root / target-arm / helper.c @ 8641136c
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| 1 |
#include "cpu.h" |
|---|---|
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#include "exec/gdbstub.h" |
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#include "helper.h" |
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#include "qemu/host-utils.h" |
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#include "sysemu/arch_init.h" |
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#include "sysemu/sysemu.h" |
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#include "qemu/bitops.h" |
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|
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#ifndef CONFIG_USER_ONLY
|
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static inline int get_phys_addr(CPUARMState *env, uint32_t address, |
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int access_type, int is_user, |
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hwaddr *phys_ptr, int *prot,
|
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target_ulong *page_size); |
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#endif
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|
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static int vfp_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg) |
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{
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int nregs;
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|
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/* VFP data registers are always little-endian. */
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nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16; |
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if (reg < nregs) {
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stfq_le_p(buf, env->vfp.regs[reg]); |
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return 8; |
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} |
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if (arm_feature(env, ARM_FEATURE_NEON)) {
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/* Aliases for Q regs. */
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nregs += 16;
|
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if (reg < nregs) {
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stfq_le_p(buf, env->vfp.regs[(reg - 32) * 2]); |
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stfq_le_p(buf + 8, env->vfp.regs[(reg - 32) * 2 + 1]); |
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return 16; |
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} |
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} |
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switch (reg - nregs) {
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case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4; |
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case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4; |
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case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4; |
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} |
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return 0; |
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} |
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|
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static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg) |
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{
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int nregs;
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nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16; |
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if (reg < nregs) {
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env->vfp.regs[reg] = ldfq_le_p(buf); |
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return 8; |
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} |
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if (arm_feature(env, ARM_FEATURE_NEON)) {
|
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nregs += 16;
|
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if (reg < nregs) {
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env->vfp.regs[(reg - 32) * 2] = ldfq_le_p(buf); |
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env->vfp.regs[(reg - 32) * 2 + 1] = ldfq_le_p(buf + 8); |
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return 16; |
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} |
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} |
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switch (reg - nregs) {
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case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4; |
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case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4; |
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case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4; |
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} |
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return 0; |
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} |
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|
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static int raw_read(CPUARMState *env, const ARMCPRegInfo *ri, |
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uint64_t *value) |
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{
|
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if (ri->type & ARM_CP_64BIT) {
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*value = CPREG_FIELD64(env, ri); |
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} else {
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*value = CPREG_FIELD32(env, ri); |
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} |
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return 0; |
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} |
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|
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static int raw_write(CPUARMState *env, const ARMCPRegInfo *ri, |
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uint64_t value) |
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{
|
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if (ri->type & ARM_CP_64BIT) {
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CPREG_FIELD64(env, ri) = value; |
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} else {
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CPREG_FIELD32(env, ri) = value; |
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} |
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return 0; |
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} |
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|
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static bool read_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri, |
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uint64_t *v) |
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{
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/* Raw read of a coprocessor register (as needed for migration, etc)
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* return true on success, false if the read is impossible for some reason.
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*/
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if (ri->type & ARM_CP_CONST) {
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*v = ri->resetvalue; |
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} else if (ri->raw_readfn) { |
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return (ri->raw_readfn(env, ri, v) == 0); |
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} else if (ri->readfn) { |
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return (ri->readfn(env, ri, v) == 0); |
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} else {
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if (ri->type & ARM_CP_64BIT) {
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*v = CPREG_FIELD64(env, ri); |
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} else {
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*v = CPREG_FIELD32(env, ri); |
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} |
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} |
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return true; |
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} |
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|
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static bool write_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri, |
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int64_t v) |
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{
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/* Raw write of a coprocessor register (as needed for migration, etc).
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* Return true on success, false if the write is impossible for some reason.
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* Note that constant registers are treated as write-ignored; the
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* caller should check for success by whether a readback gives the
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* value written.
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*/
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if (ri->type & ARM_CP_CONST) {
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return true; |
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} else if (ri->raw_writefn) { |
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return (ri->raw_writefn(env, ri, v) == 0); |
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} else if (ri->writefn) { |
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return (ri->writefn(env, ri, v) == 0); |
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} else {
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if (ri->type & ARM_CP_64BIT) {
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CPREG_FIELD64(env, ri) = v; |
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} else {
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CPREG_FIELD32(env, ri) = v; |
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} |
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} |
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return true; |
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} |
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|
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bool write_cpustate_to_list(ARMCPU *cpu)
|
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{
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/* Write the coprocessor state from cpu->env to the (index,value) list. */
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int i;
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bool ok = true; |
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|
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for (i = 0; i < cpu->cpreg_array_len; i++) { |
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uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]); |
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const ARMCPRegInfo *ri;
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uint64_t v; |
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ri = get_arm_cp_reginfo(cpu, regidx); |
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if (!ri) {
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ok = false;
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continue;
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} |
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if (ri->type & ARM_CP_NO_MIGRATE) {
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continue;
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} |
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if (!read_raw_cp_reg(&cpu->env, ri, &v)) {
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ok = false;
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continue;
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} |
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cpu->cpreg_values[i] = v; |
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} |
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return ok;
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} |
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|
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bool write_list_to_cpustate(ARMCPU *cpu)
|
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{
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int i;
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bool ok = true; |
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|
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for (i = 0; i < cpu->cpreg_array_len; i++) { |
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uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]); |
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uint64_t v = cpu->cpreg_values[i]; |
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uint64_t readback; |
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const ARMCPRegInfo *ri;
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ri = get_arm_cp_reginfo(cpu, regidx); |
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if (!ri) {
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ok = false;
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continue;
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} |
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if (ri->type & ARM_CP_NO_MIGRATE) {
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continue;
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} |
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/* Write value and confirm it reads back as written
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* (to catch read-only registers and partially read-only
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* registers where the incoming migration value doesn't match)
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*/
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if (!write_raw_cp_reg(&cpu->env, ri, v) ||
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!read_raw_cp_reg(&cpu->env, ri, &readback) || |
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readback != v) {
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ok = false;
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} |
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} |
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return ok;
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} |
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|
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static void add_cpreg_to_list(gpointer key, gpointer opaque) |
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{
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ARMCPU *cpu = opaque; |
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uint64_t regidx; |
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const ARMCPRegInfo *ri;
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regidx = *(uint32_t *)key; |
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ri = get_arm_cp_reginfo(cpu, regidx); |
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if (!(ri->type & ARM_CP_NO_MIGRATE)) {
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cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx); |
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/* The value array need not be initialized at this point */
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cpu->cpreg_array_len++; |
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} |
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} |
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|
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static void count_cpreg(gpointer key, gpointer opaque) |
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{
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ARMCPU *cpu = opaque; |
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uint64_t regidx; |
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const ARMCPRegInfo *ri;
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regidx = *(uint32_t *)key; |
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ri = get_arm_cp_reginfo(cpu, regidx); |
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if (!(ri->type & ARM_CP_NO_MIGRATE)) {
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cpu->cpreg_array_len++; |
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} |
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} |
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static gint cpreg_key_compare(gconstpointer a, gconstpointer b)
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{
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uint32_t aidx = *(uint32_t *)a; |
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uint32_t bidx = *(uint32_t *)b; |
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return aidx - bidx;
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} |
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|
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static void cpreg_make_keylist(gpointer key, gpointer value, gpointer udata) |
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{
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GList **plist = udata; |
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*plist = g_list_prepend(*plist, key); |
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} |
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void init_cpreg_list(ARMCPU *cpu)
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{
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/* Initialise the cpreg_tuples[] array based on the cp_regs hash.
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* Note that we require cpreg_tuples[] to be sorted by key ID.
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*/
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GList *keys = NULL;
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int arraylen;
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g_hash_table_foreach(cpu->cp_regs, cpreg_make_keylist, &keys); |
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|
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keys = g_list_sort(keys, cpreg_key_compare); |
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|
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cpu->cpreg_array_len = 0;
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g_list_foreach(keys, count_cpreg, cpu); |
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arraylen = cpu->cpreg_array_len; |
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cpu->cpreg_indexes = g_new(uint64_t, arraylen); |
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cpu->cpreg_values = g_new(uint64_t, arraylen); |
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cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen); |
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cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen); |
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cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len; |
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cpu->cpreg_array_len = 0;
|
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|
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g_list_foreach(keys, add_cpreg_to_list, cpu); |
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|
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assert(cpu->cpreg_array_len == arraylen); |
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|
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g_list_free(keys); |
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} |
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|
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static int dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) |
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{
|
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env->cp15.c3 = value; |
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tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */ |
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return 0; |
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} |
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|
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static int fcse_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) |
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{
|
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if (env->cp15.c13_fcse != value) {
|
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/* Unlike real hardware the qemu TLB uses virtual addresses,
|
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* not modified virtual addresses, so this causes a TLB flush.
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*/
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tlb_flush(env, 1);
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env->cp15.c13_fcse = value; |
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} |
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return 0; |
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} |
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static int contextidr_write(CPUARMState *env, const ARMCPRegInfo *ri, |
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uint64_t value) |
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{
|
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if (env->cp15.c13_context != value && !arm_feature(env, ARM_FEATURE_MPU)) {
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/* For VMSA (when not using the LPAE long descriptor page table
|
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* format) this register includes the ASID, so do a TLB flush.
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* For PMSA it is purely a process ID and no action is needed.
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*/
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tlb_flush(env, 1);
|
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} |
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env->cp15.c13_context = value; |
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return 0; |
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} |
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|
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static int tlbiall_write(CPUARMState *env, const ARMCPRegInfo *ri, |
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uint64_t value) |
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{
|
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/* Invalidate all (TLBIALL) */
|
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tlb_flush(env, 1);
|
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return 0; |
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} |
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|
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static int tlbimva_write(CPUARMState *env, const ARMCPRegInfo *ri, |
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uint64_t value) |
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{
|
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/* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */
|
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tlb_flush_page(env, value & TARGET_PAGE_MASK); |
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return 0; |
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} |
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|
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static int tlbiasid_write(CPUARMState *env, const ARMCPRegInfo *ri, |
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uint64_t value) |
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{
|
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/* Invalidate by ASID (TLBIASID) */
|
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tlb_flush(env, value == 0);
|
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return 0; |
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} |
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|
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static int tlbimvaa_write(CPUARMState *env, const ARMCPRegInfo *ri, |
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uint64_t value) |
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{
|
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/* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */
|
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tlb_flush_page(env, value & TARGET_PAGE_MASK); |
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return 0; |
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} |
| 335 |
|
| 336 |
static const ARMCPRegInfo cp_reginfo[] = { |
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/* DBGDIDR: just RAZ. In particular this means the "debug architecture
|
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* version" bits will read as a reserved value, which should cause
|
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* Linux to not try to use the debug hardware.
|
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*/
|
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{ .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
|
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.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
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/* MMU Domain access control / MPU write buffer control */
|
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{ .name = "DACR", .cp = 15,
|
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.crn = 3, .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
|
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.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c3), |
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.resetvalue = 0, .writefn = dacr_write, .raw_writefn = raw_write, },
|
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{ .name = "FCSEIDR", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 0,
|
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.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c13_fcse), |
| 350 |
.resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, },
|
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{ .name = "CONTEXTIDR", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 1,
|
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.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c13_fcse), |
| 353 |
.resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
|
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/* ??? This covers not just the impdef TLB lockdown registers but also
|
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* some v7VMSA registers relating to TEX remap, so it is overly broad.
|
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*/
|
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{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = CP_ANY,
|
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.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP }, |
| 359 |
/* MMU TLB control. Note that the wildcarding means we cover not just
|
| 360 |
* the unified TLB ops but also the dside/iside/inner-shareable variants.
|
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*/
|
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{ .name = "TLBIALL", .cp = 15, .crn = 8, .crm = CP_ANY,
|
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.opc1 = CP_ANY, .opc2 = 0, .access = PL1_W, .writefn = tlbiall_write,
|
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.type = ARM_CP_NO_MIGRATE }, |
| 365 |
{ .name = "TLBIMVA", .cp = 15, .crn = 8, .crm = CP_ANY,
|
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.opc1 = CP_ANY, .opc2 = 1, .access = PL1_W, .writefn = tlbimva_write,
|
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.type = ARM_CP_NO_MIGRATE }, |
| 368 |
{ .name = "TLBIASID", .cp = 15, .crn = 8, .crm = CP_ANY,
|
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.opc1 = CP_ANY, .opc2 = 2, .access = PL1_W, .writefn = tlbiasid_write,
|
| 370 |
.type = ARM_CP_NO_MIGRATE }, |
| 371 |
{ .name = "TLBIMVAA", .cp = 15, .crn = 8, .crm = CP_ANY,
|
| 372 |
.opc1 = CP_ANY, .opc2 = 3, .access = PL1_W, .writefn = tlbimvaa_write,
|
| 373 |
.type = ARM_CP_NO_MIGRATE }, |
| 374 |
/* Cache maintenance ops; some of this space may be overridden later. */
|
| 375 |
{ .name = "CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
|
| 376 |
.opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
|
| 377 |
.type = ARM_CP_NOP | ARM_CP_OVERRIDE }, |
| 378 |
REGINFO_SENTINEL |
| 379 |
}; |
| 380 |
|
| 381 |
static const ARMCPRegInfo not_v6_cp_reginfo[] = { |
| 382 |
/* Not all pre-v6 cores implemented this WFI, so this is slightly
|
| 383 |
* over-broad.
|
| 384 |
*/
|
| 385 |
{ .name = "WFI_v5", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = 2,
|
| 386 |
.access = PL1_W, .type = ARM_CP_WFI }, |
| 387 |
REGINFO_SENTINEL |
| 388 |
}; |
| 389 |
|
| 390 |
static const ARMCPRegInfo not_v7_cp_reginfo[] = { |
| 391 |
/* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which
|
| 392 |
* is UNPREDICTABLE; we choose to NOP as most implementations do).
|
| 393 |
*/
|
| 394 |
{ .name = "WFI_v6", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
|
| 395 |
.access = PL1_W, .type = ARM_CP_WFI }, |
| 396 |
/* L1 cache lockdown. Not architectural in v6 and earlier but in practice
|
| 397 |
* implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and
|
| 398 |
* OMAPCP will override this space.
|
| 399 |
*/
|
| 400 |
{ .name = "DLOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 401 |
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_data), |
| 402 |
.resetvalue = 0 },
|
| 403 |
{ .name = "ILOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 1,
|
| 404 |
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_insn), |
| 405 |
.resetvalue = 0 },
|
| 406 |
/* v6 doesn't have the cache ID registers but Linux reads them anyway */
|
| 407 |
{ .name = "DUMMY", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = CP_ANY,
|
| 408 |
.access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE, |
| 409 |
.resetvalue = 0 },
|
| 410 |
REGINFO_SENTINEL |
| 411 |
}; |
| 412 |
|
| 413 |
static int cpacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) |
| 414 |
{
|
| 415 |
if (env->cp15.c1_coproc != value) {
|
| 416 |
env->cp15.c1_coproc = value; |
| 417 |
/* ??? Is this safe when called from within a TB? */
|
| 418 |
tb_flush(env); |
| 419 |
} |
| 420 |
return 0; |
| 421 |
} |
| 422 |
|
| 423 |
static const ARMCPRegInfo v6_cp_reginfo[] = { |
| 424 |
/* prefetch by MVA in v6, NOP in v7 */
|
| 425 |
{ .name = "MVA_prefetch",
|
| 426 |
.cp = 15, .crn = 7, .crm = 13, .opc1 = 0, .opc2 = 1, |
| 427 |
.access = PL1_W, .type = ARM_CP_NOP }, |
| 428 |
{ .name = "ISB", .cp = 15, .crn = 7, .crm = 5, .opc1 = 0, .opc2 = 4,
|
| 429 |
.access = PL0_W, .type = ARM_CP_NOP }, |
| 430 |
{ .name = "DSB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 4,
|
| 431 |
.access = PL0_W, .type = ARM_CP_NOP }, |
| 432 |
{ .name = "DMB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 5,
|
| 433 |
.access = PL0_W, .type = ARM_CP_NOP }, |
| 434 |
{ .name = "IFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 2,
|
| 435 |
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c6_insn), |
| 436 |
.resetvalue = 0, },
|
| 437 |
/* Watchpoint Fault Address Register : should actually only be present
|
| 438 |
* for 1136, 1176, 11MPCore.
|
| 439 |
*/
|
| 440 |
{ .name = "WFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1,
|
| 441 |
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0, },
|
| 442 |
{ .name = "CPACR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2,
|
| 443 |
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_coproc), |
| 444 |
.resetvalue = 0, .writefn = cpacr_write },
|
| 445 |
REGINFO_SENTINEL |
| 446 |
}; |
| 447 |
|
| 448 |
|
| 449 |
static int pmreg_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 450 |
uint64_t *value) |
| 451 |
{
|
| 452 |
/* Generic performance monitor register read function for where
|
| 453 |
* user access may be allowed by PMUSERENR.
|
| 454 |
*/
|
| 455 |
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) { |
| 456 |
return EXCP_UDEF;
|
| 457 |
} |
| 458 |
*value = CPREG_FIELD32(env, ri); |
| 459 |
return 0; |
| 460 |
} |
| 461 |
|
| 462 |
static int pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 463 |
uint64_t value) |
| 464 |
{
|
| 465 |
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) { |
| 466 |
return EXCP_UDEF;
|
| 467 |
} |
| 468 |
/* only the DP, X, D and E bits are writable */
|
| 469 |
env->cp15.c9_pmcr &= ~0x39;
|
| 470 |
env->cp15.c9_pmcr |= (value & 0x39);
|
| 471 |
return 0; |
| 472 |
} |
| 473 |
|
| 474 |
static int pmcntenset_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 475 |
uint64_t value) |
| 476 |
{
|
| 477 |
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) { |
| 478 |
return EXCP_UDEF;
|
| 479 |
} |
| 480 |
value &= (1 << 31); |
| 481 |
env->cp15.c9_pmcnten |= value; |
| 482 |
return 0; |
| 483 |
} |
| 484 |
|
| 485 |
static int pmcntenclr_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 486 |
uint64_t value) |
| 487 |
{
|
| 488 |
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) { |
| 489 |
return EXCP_UDEF;
|
| 490 |
} |
| 491 |
value &= (1 << 31); |
| 492 |
env->cp15.c9_pmcnten &= ~value; |
| 493 |
return 0; |
| 494 |
} |
| 495 |
|
| 496 |
static int pmovsr_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 497 |
uint64_t value) |
| 498 |
{
|
| 499 |
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) { |
| 500 |
return EXCP_UDEF;
|
| 501 |
} |
| 502 |
env->cp15.c9_pmovsr &= ~value; |
| 503 |
return 0; |
| 504 |
} |
| 505 |
|
| 506 |
static int pmxevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 507 |
uint64_t value) |
| 508 |
{
|
| 509 |
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) { |
| 510 |
return EXCP_UDEF;
|
| 511 |
} |
| 512 |
env->cp15.c9_pmxevtyper = value & 0xff;
|
| 513 |
return 0; |
| 514 |
} |
| 515 |
|
| 516 |
static int pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 517 |
uint64_t value) |
| 518 |
{
|
| 519 |
env->cp15.c9_pmuserenr = value & 1;
|
| 520 |
return 0; |
| 521 |
} |
| 522 |
|
| 523 |
static int pmintenset_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 524 |
uint64_t value) |
| 525 |
{
|
| 526 |
/* We have no event counters so only the C bit can be changed */
|
| 527 |
value &= (1 << 31); |
| 528 |
env->cp15.c9_pminten |= value; |
| 529 |
return 0; |
| 530 |
} |
| 531 |
|
| 532 |
static int pmintenclr_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 533 |
uint64_t value) |
| 534 |
{
|
| 535 |
value &= (1 << 31); |
| 536 |
env->cp15.c9_pminten &= ~value; |
| 537 |
return 0; |
| 538 |
} |
| 539 |
|
| 540 |
static int vbar_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 541 |
uint64_t value) |
| 542 |
{
|
| 543 |
env->cp15.c12_vbar = value & ~0x1Ful;
|
| 544 |
return 0; |
| 545 |
} |
| 546 |
|
| 547 |
static int ccsidr_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 548 |
uint64_t *value) |
| 549 |
{
|
| 550 |
ARMCPU *cpu = arm_env_get_cpu(env); |
| 551 |
*value = cpu->ccsidr[env->cp15.c0_cssel]; |
| 552 |
return 0; |
| 553 |
} |
| 554 |
|
| 555 |
static int csselr_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 556 |
uint64_t value) |
| 557 |
{
|
| 558 |
env->cp15.c0_cssel = value & 0xf;
|
| 559 |
return 0; |
| 560 |
} |
| 561 |
|
| 562 |
static const ARMCPRegInfo v7_cp_reginfo[] = { |
| 563 |
/* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
|
| 564 |
* debug components
|
| 565 |
*/
|
| 566 |
{ .name = "DBGDRAR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 567 |
.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 568 |
{ .name = "DBGDSAR", .cp = 14, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 569 |
.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 570 |
/* the old v6 WFI, UNPREDICTABLE in v7 but we choose to NOP */
|
| 571 |
{ .name = "NOP", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
|
| 572 |
.access = PL1_W, .type = ARM_CP_NOP }, |
| 573 |
/* Performance monitors are implementation defined in v7,
|
| 574 |
* but with an ARM recommended set of registers, which we
|
| 575 |
* follow (although we don't actually implement any counters)
|
| 576 |
*
|
| 577 |
* Performance registers fall into three categories:
|
| 578 |
* (a) always UNDEF in PL0, RW in PL1 (PMINTENSET, PMINTENCLR)
|
| 579 |
* (b) RO in PL0 (ie UNDEF on write), RW in PL1 (PMUSERENR)
|
| 580 |
* (c) UNDEF in PL0 if PMUSERENR.EN==0, otherwise accessible (all others)
|
| 581 |
* For the cases controlled by PMUSERENR we must set .access to PL0_RW
|
| 582 |
* or PL0_RO as appropriate and then check PMUSERENR in the helper fn.
|
| 583 |
*/
|
| 584 |
{ .name = "PMCNTENSET", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 1,
|
| 585 |
.access = PL0_RW, .resetvalue = 0,
|
| 586 |
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten), |
| 587 |
.readfn = pmreg_read, .writefn = pmcntenset_write, |
| 588 |
.raw_readfn = raw_read, .raw_writefn = raw_write }, |
| 589 |
{ .name = "PMCNTENCLR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 2,
|
| 590 |
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten), |
| 591 |
.readfn = pmreg_read, .writefn = pmcntenclr_write, |
| 592 |
.type = ARM_CP_NO_MIGRATE }, |
| 593 |
{ .name = "PMOVSR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 3,
|
| 594 |
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmovsr), |
| 595 |
.readfn = pmreg_read, .writefn = pmovsr_write, |
| 596 |
.raw_readfn = raw_read, .raw_writefn = raw_write }, |
| 597 |
/* Unimplemented so WI. Strictly speaking write accesses in PL0 should
|
| 598 |
* respect PMUSERENR.
|
| 599 |
*/
|
| 600 |
{ .name = "PMSWINC", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 4,
|
| 601 |
.access = PL0_W, .type = ARM_CP_NOP }, |
| 602 |
/* Since we don't implement any events, writing to PMSELR is UNPREDICTABLE.
|
| 603 |
* We choose to RAZ/WI. XXX should respect PMUSERENR.
|
| 604 |
*/
|
| 605 |
{ .name = "PMSELR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 5,
|
| 606 |
.access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 607 |
/* Unimplemented, RAZ/WI. XXX PMUSERENR */
|
| 608 |
{ .name = "PMCCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 0,
|
| 609 |
.access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 610 |
{ .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1,
|
| 611 |
.access = PL0_RW, |
| 612 |
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmxevtyper), |
| 613 |
.readfn = pmreg_read, .writefn = pmxevtyper_write, |
| 614 |
.raw_readfn = raw_read, .raw_writefn = raw_write }, |
| 615 |
/* Unimplemented, RAZ/WI. XXX PMUSERENR */
|
| 616 |
{ .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2,
|
| 617 |
.access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 618 |
{ .name = "PMUSERENR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 0,
|
| 619 |
.access = PL0_R | PL1_RW, |
| 620 |
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmuserenr), |
| 621 |
.resetvalue = 0,
|
| 622 |
.writefn = pmuserenr_write, .raw_writefn = raw_write }, |
| 623 |
{ .name = "PMINTENSET", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 1,
|
| 624 |
.access = PL1_RW, |
| 625 |
.fieldoffset = offsetof(CPUARMState, cp15.c9_pminten), |
| 626 |
.resetvalue = 0,
|
| 627 |
.writefn = pmintenset_write, .raw_writefn = raw_write }, |
| 628 |
{ .name = "PMINTENCLR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 2,
|
| 629 |
.access = PL1_RW, .type = ARM_CP_NO_MIGRATE, |
| 630 |
.fieldoffset = offsetof(CPUARMState, cp15.c9_pminten), |
| 631 |
.resetvalue = 0, .writefn = pmintenclr_write, },
|
| 632 |
{ .name = "VBAR", .cp = 15, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 633 |
.access = PL1_RW, .writefn = vbar_write, |
| 634 |
.fieldoffset = offsetof(CPUARMState, cp15.c12_vbar), |
| 635 |
.resetvalue = 0 },
|
| 636 |
{ .name = "SCR", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 0,
|
| 637 |
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_scr), |
| 638 |
.resetvalue = 0, },
|
| 639 |
{ .name = "CCSIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0,
|
| 640 |
.access = PL1_R, .readfn = ccsidr_read, .type = ARM_CP_NO_MIGRATE }, |
| 641 |
{ .name = "CSSELR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 2, .opc2 = 0,
|
| 642 |
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c0_cssel), |
| 643 |
.writefn = csselr_write, .resetvalue = 0 },
|
| 644 |
/* Auxiliary ID register: this actually has an IMPDEF value but for now
|
| 645 |
* just RAZ for all cores:
|
| 646 |
*/
|
| 647 |
{ .name = "AIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 7,
|
| 648 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 649 |
REGINFO_SENTINEL |
| 650 |
}; |
| 651 |
|
| 652 |
static int teecr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) |
| 653 |
{
|
| 654 |
value &= 1;
|
| 655 |
env->teecr = value; |
| 656 |
return 0; |
| 657 |
} |
| 658 |
|
| 659 |
static int teehbr_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 660 |
uint64_t *value) |
| 661 |
{
|
| 662 |
/* This is a helper function because the user access rights
|
| 663 |
* depend on the value of the TEECR.
|
| 664 |
*/
|
| 665 |
if (arm_current_pl(env) == 0 && (env->teecr & 1)) { |
| 666 |
return EXCP_UDEF;
|
| 667 |
} |
| 668 |
*value = env->teehbr; |
| 669 |
return 0; |
| 670 |
} |
| 671 |
|
| 672 |
static int teehbr_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 673 |
uint64_t value) |
| 674 |
{
|
| 675 |
if (arm_current_pl(env) == 0 && (env->teecr & 1)) { |
| 676 |
return EXCP_UDEF;
|
| 677 |
} |
| 678 |
env->teehbr = value; |
| 679 |
return 0; |
| 680 |
} |
| 681 |
|
| 682 |
static const ARMCPRegInfo t2ee_cp_reginfo[] = { |
| 683 |
{ .name = "TEECR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 6, .opc2 = 0,
|
| 684 |
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, teecr), |
| 685 |
.resetvalue = 0,
|
| 686 |
.writefn = teecr_write }, |
| 687 |
{ .name = "TEEHBR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 6, .opc2 = 0,
|
| 688 |
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, teehbr), |
| 689 |
.resetvalue = 0, .raw_readfn = raw_read, .raw_writefn = raw_write,
|
| 690 |
.readfn = teehbr_read, .writefn = teehbr_write }, |
| 691 |
REGINFO_SENTINEL |
| 692 |
}; |
| 693 |
|
| 694 |
static const ARMCPRegInfo v6k_cp_reginfo[] = { |
| 695 |
{ .name = "TPIDRURW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 2,
|
| 696 |
.access = PL0_RW, |
| 697 |
.fieldoffset = offsetof(CPUARMState, cp15.c13_tls1), |
| 698 |
.resetvalue = 0 },
|
| 699 |
{ .name = "TPIDRURO", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 3,
|
| 700 |
.access = PL0_R|PL1_W, |
| 701 |
.fieldoffset = offsetof(CPUARMState, cp15.c13_tls2), |
| 702 |
.resetvalue = 0 },
|
| 703 |
{ .name = "TPIDRPRW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 4,
|
| 704 |
.access = PL1_RW, |
| 705 |
.fieldoffset = offsetof(CPUARMState, cp15.c13_tls3), |
| 706 |
.resetvalue = 0 },
|
| 707 |
REGINFO_SENTINEL |
| 708 |
}; |
| 709 |
|
| 710 |
#ifndef CONFIG_USER_ONLY
|
| 711 |
|
| 712 |
static uint64_t gt_get_countervalue(CPUARMState *env)
|
| 713 |
{
|
| 714 |
return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / GTIMER_SCALE;
|
| 715 |
} |
| 716 |
|
| 717 |
static void gt_recalc_timer(ARMCPU *cpu, int timeridx) |
| 718 |
{
|
| 719 |
ARMGenericTimer *gt = &cpu->env.cp15.c14_timer[timeridx]; |
| 720 |
|
| 721 |
if (gt->ctl & 1) { |
| 722 |
/* Timer enabled: calculate and set current ISTATUS, irq, and
|
| 723 |
* reset timer to when ISTATUS next has to change
|
| 724 |
*/
|
| 725 |
uint64_t count = gt_get_countervalue(&cpu->env); |
| 726 |
/* Note that this must be unsigned 64 bit arithmetic: */
|
| 727 |
int istatus = count >= gt->cval;
|
| 728 |
uint64_t nexttick; |
| 729 |
|
| 730 |
gt->ctl = deposit32(gt->ctl, 2, 1, istatus); |
| 731 |
qemu_set_irq(cpu->gt_timer_outputs[timeridx], |
| 732 |
(istatus && !(gt->ctl & 2)));
|
| 733 |
if (istatus) {
|
| 734 |
/* Next transition is when count rolls back over to zero */
|
| 735 |
nexttick = UINT64_MAX; |
| 736 |
} else {
|
| 737 |
/* Next transition is when we hit cval */
|
| 738 |
nexttick = gt->cval; |
| 739 |
} |
| 740 |
/* Note that the desired next expiry time might be beyond the
|
| 741 |
* signed-64-bit range of a QEMUTimer -- in this case we just
|
| 742 |
* set the timer for as far in the future as possible. When the
|
| 743 |
* timer expires we will reset the timer for any remaining period.
|
| 744 |
*/
|
| 745 |
if (nexttick > INT64_MAX / GTIMER_SCALE) {
|
| 746 |
nexttick = INT64_MAX / GTIMER_SCALE; |
| 747 |
} |
| 748 |
timer_mod(cpu->gt_timer[timeridx], nexttick); |
| 749 |
} else {
|
| 750 |
/* Timer disabled: ISTATUS and timer output always clear */
|
| 751 |
gt->ctl &= ~4;
|
| 752 |
qemu_set_irq(cpu->gt_timer_outputs[timeridx], 0);
|
| 753 |
timer_del(cpu->gt_timer[timeridx]); |
| 754 |
} |
| 755 |
} |
| 756 |
|
| 757 |
static int gt_cntfrq_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 758 |
uint64_t *value) |
| 759 |
{
|
| 760 |
/* Not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero */
|
| 761 |
if (arm_current_pl(env) == 0 && !extract32(env->cp15.c14_cntkctl, 0, 2)) { |
| 762 |
return EXCP_UDEF;
|
| 763 |
} |
| 764 |
*value = env->cp15.c14_cntfrq; |
| 765 |
return 0; |
| 766 |
} |
| 767 |
|
| 768 |
static void gt_cnt_reset(CPUARMState *env, const ARMCPRegInfo *ri) |
| 769 |
{
|
| 770 |
ARMCPU *cpu = arm_env_get_cpu(env); |
| 771 |
int timeridx = ri->opc1 & 1; |
| 772 |
|
| 773 |
timer_del(cpu->gt_timer[timeridx]); |
| 774 |
} |
| 775 |
|
| 776 |
static int gt_cnt_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 777 |
uint64_t *value) |
| 778 |
{
|
| 779 |
int timeridx = ri->opc1 & 1; |
| 780 |
|
| 781 |
if (arm_current_pl(env) == 0 && |
| 782 |
!extract32(env->cp15.c14_cntkctl, timeridx, 1)) {
|
| 783 |
return EXCP_UDEF;
|
| 784 |
} |
| 785 |
*value = gt_get_countervalue(env); |
| 786 |
return 0; |
| 787 |
} |
| 788 |
|
| 789 |
static int gt_cval_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 790 |
uint64_t *value) |
| 791 |
{
|
| 792 |
int timeridx = ri->opc1 & 1; |
| 793 |
|
| 794 |
if (arm_current_pl(env) == 0 && |
| 795 |
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) { |
| 796 |
return EXCP_UDEF;
|
| 797 |
} |
| 798 |
*value = env->cp15.c14_timer[timeridx].cval; |
| 799 |
return 0; |
| 800 |
} |
| 801 |
|
| 802 |
static int gt_cval_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 803 |
uint64_t value) |
| 804 |
{
|
| 805 |
int timeridx = ri->opc1 & 1; |
| 806 |
|
| 807 |
env->cp15.c14_timer[timeridx].cval = value; |
| 808 |
gt_recalc_timer(arm_env_get_cpu(env), timeridx); |
| 809 |
return 0; |
| 810 |
} |
| 811 |
static int gt_tval_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 812 |
uint64_t *value) |
| 813 |
{
|
| 814 |
int timeridx = ri->crm & 1; |
| 815 |
|
| 816 |
if (arm_current_pl(env) == 0 && |
| 817 |
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) { |
| 818 |
return EXCP_UDEF;
|
| 819 |
} |
| 820 |
*value = (uint32_t)(env->cp15.c14_timer[timeridx].cval - |
| 821 |
gt_get_countervalue(env)); |
| 822 |
return 0; |
| 823 |
} |
| 824 |
|
| 825 |
static int gt_tval_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 826 |
uint64_t value) |
| 827 |
{
|
| 828 |
int timeridx = ri->crm & 1; |
| 829 |
|
| 830 |
env->cp15.c14_timer[timeridx].cval = gt_get_countervalue(env) + |
| 831 |
+ sextract64(value, 0, 32); |
| 832 |
gt_recalc_timer(arm_env_get_cpu(env), timeridx); |
| 833 |
return 0; |
| 834 |
} |
| 835 |
|
| 836 |
static int gt_ctl_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 837 |
uint64_t *value) |
| 838 |
{
|
| 839 |
int timeridx = ri->crm & 1; |
| 840 |
|
| 841 |
if (arm_current_pl(env) == 0 && |
| 842 |
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) { |
| 843 |
return EXCP_UDEF;
|
| 844 |
} |
| 845 |
*value = env->cp15.c14_timer[timeridx].ctl; |
| 846 |
return 0; |
| 847 |
} |
| 848 |
|
| 849 |
static int gt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 850 |
uint64_t value) |
| 851 |
{
|
| 852 |
ARMCPU *cpu = arm_env_get_cpu(env); |
| 853 |
int timeridx = ri->crm & 1; |
| 854 |
uint32_t oldval = env->cp15.c14_timer[timeridx].ctl; |
| 855 |
|
| 856 |
env->cp15.c14_timer[timeridx].ctl = value & 3;
|
| 857 |
if ((oldval ^ value) & 1) { |
| 858 |
/* Enable toggled */
|
| 859 |
gt_recalc_timer(cpu, timeridx); |
| 860 |
} else if ((oldval & value) & 2) { |
| 861 |
/* IMASK toggled: don't need to recalculate,
|
| 862 |
* just set the interrupt line based on ISTATUS
|
| 863 |
*/
|
| 864 |
qemu_set_irq(cpu->gt_timer_outputs[timeridx], |
| 865 |
(oldval & 4) && (value & 2)); |
| 866 |
} |
| 867 |
return 0; |
| 868 |
} |
| 869 |
|
| 870 |
void arm_gt_ptimer_cb(void *opaque) |
| 871 |
{
|
| 872 |
ARMCPU *cpu = opaque; |
| 873 |
|
| 874 |
gt_recalc_timer(cpu, GTIMER_PHYS); |
| 875 |
} |
| 876 |
|
| 877 |
void arm_gt_vtimer_cb(void *opaque) |
| 878 |
{
|
| 879 |
ARMCPU *cpu = opaque; |
| 880 |
|
| 881 |
gt_recalc_timer(cpu, GTIMER_VIRT); |
| 882 |
} |
| 883 |
|
| 884 |
static const ARMCPRegInfo generic_timer_cp_reginfo[] = { |
| 885 |
/* Note that CNTFRQ is purely reads-as-written for the benefit
|
| 886 |
* of software; writing it doesn't actually change the timer frequency.
|
| 887 |
* Our reset value matches the fixed frequency we implement the timer at.
|
| 888 |
*/
|
| 889 |
{ .name = "CNTFRQ", .cp = 15, .crn = 14, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 890 |
.access = PL1_RW | PL0_R, |
| 891 |
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntfrq), |
| 892 |
.resetvalue = (1000 * 1000 * 1000) / GTIMER_SCALE, |
| 893 |
.readfn = gt_cntfrq_read, .raw_readfn = raw_read, |
| 894 |
}, |
| 895 |
/* overall control: mostly access permissions */
|
| 896 |
{ .name = "CNTKCTL", .cp = 15, .crn = 14, .crm = 1, .opc1 = 0, .opc2 = 0,
|
| 897 |
.access = PL1_RW, |
| 898 |
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntkctl), |
| 899 |
.resetvalue = 0,
|
| 900 |
}, |
| 901 |
/* per-timer control */
|
| 902 |
{ .name = "CNTP_CTL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 1,
|
| 903 |
.type = ARM_CP_IO, .access = PL1_RW | PL0_R, |
| 904 |
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].ctl), |
| 905 |
.resetvalue = 0,
|
| 906 |
.readfn = gt_ctl_read, .writefn = gt_ctl_write, |
| 907 |
.raw_readfn = raw_read, .raw_writefn = raw_write, |
| 908 |
}, |
| 909 |
{ .name = "CNTV_CTL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 1,
|
| 910 |
.type = ARM_CP_IO, .access = PL1_RW | PL0_R, |
| 911 |
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].ctl), |
| 912 |
.resetvalue = 0,
|
| 913 |
.readfn = gt_ctl_read, .writefn = gt_ctl_write, |
| 914 |
.raw_readfn = raw_read, .raw_writefn = raw_write, |
| 915 |
}, |
| 916 |
/* TimerValue views: a 32 bit downcounting view of the underlying state */
|
| 917 |
{ .name = "CNTP_TVAL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 0,
|
| 918 |
.type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R, |
| 919 |
.readfn = gt_tval_read, .writefn = gt_tval_write, |
| 920 |
}, |
| 921 |
{ .name = "CNTV_TVAL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 0,
|
| 922 |
.type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R, |
| 923 |
.readfn = gt_tval_read, .writefn = gt_tval_write, |
| 924 |
}, |
| 925 |
/* The counter itself */
|
| 926 |
{ .name = "CNTPCT", .cp = 15, .crm = 14, .opc1 = 0,
|
| 927 |
.access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO, |
| 928 |
.readfn = gt_cnt_read, .resetfn = gt_cnt_reset, |
| 929 |
}, |
| 930 |
{ .name = "CNTVCT", .cp = 15, .crm = 14, .opc1 = 1,
|
| 931 |
.access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO, |
| 932 |
.readfn = gt_cnt_read, .resetfn = gt_cnt_reset, |
| 933 |
}, |
| 934 |
/* Comparison value, indicating when the timer goes off */
|
| 935 |
{ .name = "CNTP_CVAL", .cp = 15, .crm = 14, .opc1 = 2,
|
| 936 |
.access = PL1_RW | PL0_R, |
| 937 |
.type = ARM_CP_64BIT | ARM_CP_IO, |
| 938 |
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval), |
| 939 |
.resetvalue = 0,
|
| 940 |
.readfn = gt_cval_read, .writefn = gt_cval_write, |
| 941 |
.raw_readfn = raw_read, .raw_writefn = raw_write, |
| 942 |
}, |
| 943 |
{ .name = "CNTV_CVAL", .cp = 15, .crm = 14, .opc1 = 3,
|
| 944 |
.access = PL1_RW | PL0_R, |
| 945 |
.type = ARM_CP_64BIT | ARM_CP_IO, |
| 946 |
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval), |
| 947 |
.resetvalue = 0,
|
| 948 |
.readfn = gt_cval_read, .writefn = gt_cval_write, |
| 949 |
.raw_readfn = raw_read, .raw_writefn = raw_write, |
| 950 |
}, |
| 951 |
REGINFO_SENTINEL |
| 952 |
}; |
| 953 |
|
| 954 |
#else
|
| 955 |
/* In user-mode none of the generic timer registers are accessible,
|
| 956 |
* and their implementation depends on QEMU_CLOCK_VIRTUAL and qdev gpio outputs,
|
| 957 |
* so instead just don't register any of them.
|
| 958 |
*/
|
| 959 |
static const ARMCPRegInfo generic_timer_cp_reginfo[] = { |
| 960 |
REGINFO_SENTINEL |
| 961 |
}; |
| 962 |
|
| 963 |
#endif
|
| 964 |
|
| 965 |
static int par_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) |
| 966 |
{
|
| 967 |
if (arm_feature(env, ARM_FEATURE_LPAE)) {
|
| 968 |
env->cp15.c7_par = value; |
| 969 |
} else if (arm_feature(env, ARM_FEATURE_V7)) { |
| 970 |
env->cp15.c7_par = value & 0xfffff6ff;
|
| 971 |
} else {
|
| 972 |
env->cp15.c7_par = value & 0xfffff1ff;
|
| 973 |
} |
| 974 |
return 0; |
| 975 |
} |
| 976 |
|
| 977 |
#ifndef CONFIG_USER_ONLY
|
| 978 |
/* get_phys_addr() isn't present for user-mode-only targets */
|
| 979 |
|
| 980 |
/* Return true if extended addresses are enabled, ie this is an
|
| 981 |
* LPAE implementation and we are using the long-descriptor translation
|
| 982 |
* table format because the TTBCR EAE bit is set.
|
| 983 |
*/
|
| 984 |
static inline bool extended_addresses_enabled(CPUARMState *env) |
| 985 |
{
|
| 986 |
return arm_feature(env, ARM_FEATURE_LPAE)
|
| 987 |
&& (env->cp15.c2_control & (1U << 31)); |
| 988 |
} |
| 989 |
|
| 990 |
static int ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) |
| 991 |
{
|
| 992 |
hwaddr phys_addr; |
| 993 |
target_ulong page_size; |
| 994 |
int prot;
|
| 995 |
int ret, is_user = ri->opc2 & 2; |
| 996 |
int access_type = ri->opc2 & 1; |
| 997 |
|
| 998 |
if (ri->opc2 & 4) { |
| 999 |
/* Other states are only available with TrustZone */
|
| 1000 |
return EXCP_UDEF;
|
| 1001 |
} |
| 1002 |
ret = get_phys_addr(env, value, access_type, is_user, |
| 1003 |
&phys_addr, &prot, &page_size); |
| 1004 |
if (extended_addresses_enabled(env)) {
|
| 1005 |
/* ret is a DFSR/IFSR value for the long descriptor
|
| 1006 |
* translation table format, but with WnR always clear.
|
| 1007 |
* Convert it to a 64-bit PAR.
|
| 1008 |
*/
|
| 1009 |
uint64_t par64 = (1 << 11); /* LPAE bit always set */ |
| 1010 |
if (ret == 0) { |
| 1011 |
par64 |= phys_addr & ~0xfffULL;
|
| 1012 |
/* We don't set the ATTR or SH fields in the PAR. */
|
| 1013 |
} else {
|
| 1014 |
par64 |= 1; /* F */ |
| 1015 |
par64 |= (ret & 0x3f) << 1; /* FS */ |
| 1016 |
/* Note that S2WLK and FSTAGE are always zero, because we don't
|
| 1017 |
* implement virtualization and therefore there can't be a stage 2
|
| 1018 |
* fault.
|
| 1019 |
*/
|
| 1020 |
} |
| 1021 |
env->cp15.c7_par = par64; |
| 1022 |
env->cp15.c7_par_hi = par64 >> 32;
|
| 1023 |
} else {
|
| 1024 |
/* ret is a DFSR/IFSR value for the short descriptor
|
| 1025 |
* translation table format (with WnR always clear).
|
| 1026 |
* Convert it to a 32-bit PAR.
|
| 1027 |
*/
|
| 1028 |
if (ret == 0) { |
| 1029 |
/* We do not set any attribute bits in the PAR */
|
| 1030 |
if (page_size == (1 << 24) |
| 1031 |
&& arm_feature(env, ARM_FEATURE_V7)) {
|
| 1032 |
env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1; |
| 1033 |
} else {
|
| 1034 |
env->cp15.c7_par = phys_addr & 0xfffff000;
|
| 1035 |
} |
| 1036 |
} else {
|
| 1037 |
env->cp15.c7_par = ((ret & (10 << 1)) >> 5) | |
| 1038 |
((ret & (12 << 1)) >> 6) | |
| 1039 |
((ret & 0xf) << 1) | 1; |
| 1040 |
} |
| 1041 |
env->cp15.c7_par_hi = 0;
|
| 1042 |
} |
| 1043 |
return 0; |
| 1044 |
} |
| 1045 |
#endif
|
| 1046 |
|
| 1047 |
static const ARMCPRegInfo vapa_cp_reginfo[] = { |
| 1048 |
{ .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0,
|
| 1049 |
.access = PL1_RW, .resetvalue = 0,
|
| 1050 |
.fieldoffset = offsetof(CPUARMState, cp15.c7_par), |
| 1051 |
.writefn = par_write }, |
| 1052 |
#ifndef CONFIG_USER_ONLY
|
| 1053 |
{ .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY,
|
| 1054 |
.access = PL1_W, .writefn = ats_write, .type = ARM_CP_NO_MIGRATE }, |
| 1055 |
#endif
|
| 1056 |
REGINFO_SENTINEL |
| 1057 |
}; |
| 1058 |
|
| 1059 |
/* Return basic MPU access permission bits. */
|
| 1060 |
static uint32_t simple_mpu_ap_bits(uint32_t val)
|
| 1061 |
{
|
| 1062 |
uint32_t ret; |
| 1063 |
uint32_t mask; |
| 1064 |
int i;
|
| 1065 |
ret = 0;
|
| 1066 |
mask = 3;
|
| 1067 |
for (i = 0; i < 16; i += 2) { |
| 1068 |
ret |= (val >> i) & mask; |
| 1069 |
mask <<= 2;
|
| 1070 |
} |
| 1071 |
return ret;
|
| 1072 |
} |
| 1073 |
|
| 1074 |
/* Pad basic MPU access permission bits to extended format. */
|
| 1075 |
static uint32_t extended_mpu_ap_bits(uint32_t val)
|
| 1076 |
{
|
| 1077 |
uint32_t ret; |
| 1078 |
uint32_t mask; |
| 1079 |
int i;
|
| 1080 |
ret = 0;
|
| 1081 |
mask = 3;
|
| 1082 |
for (i = 0; i < 16; i += 2) { |
| 1083 |
ret |= (val & mask) << i; |
| 1084 |
mask <<= 2;
|
| 1085 |
} |
| 1086 |
return ret;
|
| 1087 |
} |
| 1088 |
|
| 1089 |
static int pmsav5_data_ap_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1090 |
uint64_t value) |
| 1091 |
{
|
| 1092 |
env->cp15.c5_data = extended_mpu_ap_bits(value); |
| 1093 |
return 0; |
| 1094 |
} |
| 1095 |
|
| 1096 |
static int pmsav5_data_ap_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1097 |
uint64_t *value) |
| 1098 |
{
|
| 1099 |
*value = simple_mpu_ap_bits(env->cp15.c5_data); |
| 1100 |
return 0; |
| 1101 |
} |
| 1102 |
|
| 1103 |
static int pmsav5_insn_ap_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1104 |
uint64_t value) |
| 1105 |
{
|
| 1106 |
env->cp15.c5_insn = extended_mpu_ap_bits(value); |
| 1107 |
return 0; |
| 1108 |
} |
| 1109 |
|
| 1110 |
static int pmsav5_insn_ap_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1111 |
uint64_t *value) |
| 1112 |
{
|
| 1113 |
*value = simple_mpu_ap_bits(env->cp15.c5_insn); |
| 1114 |
return 0; |
| 1115 |
} |
| 1116 |
|
| 1117 |
static int arm946_prbs_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1118 |
uint64_t *value) |
| 1119 |
{
|
| 1120 |
if (ri->crm >= 8) { |
| 1121 |
return EXCP_UDEF;
|
| 1122 |
} |
| 1123 |
*value = env->cp15.c6_region[ri->crm]; |
| 1124 |
return 0; |
| 1125 |
} |
| 1126 |
|
| 1127 |
static int arm946_prbs_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1128 |
uint64_t value) |
| 1129 |
{
|
| 1130 |
if (ri->crm >= 8) { |
| 1131 |
return EXCP_UDEF;
|
| 1132 |
} |
| 1133 |
env->cp15.c6_region[ri->crm] = value; |
| 1134 |
return 0; |
| 1135 |
} |
| 1136 |
|
| 1137 |
static const ARMCPRegInfo pmsav5_cp_reginfo[] = { |
| 1138 |
{ .name = "DATA_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 1139 |
.access = PL1_RW, .type = ARM_CP_NO_MIGRATE, |
| 1140 |
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0,
|
| 1141 |
.readfn = pmsav5_data_ap_read, .writefn = pmsav5_data_ap_write, }, |
| 1142 |
{ .name = "INSN_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
|
| 1143 |
.access = PL1_RW, .type = ARM_CP_NO_MIGRATE, |
| 1144 |
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0,
|
| 1145 |
.readfn = pmsav5_insn_ap_read, .writefn = pmsav5_insn_ap_write, }, |
| 1146 |
{ .name = "DATA_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 2,
|
| 1147 |
.access = PL1_RW, |
| 1148 |
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
|
| 1149 |
{ .name = "INSN_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 3,
|
| 1150 |
.access = PL1_RW, |
| 1151 |
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0, },
|
| 1152 |
{ .name = "DCACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 1153 |
.access = PL1_RW, |
| 1154 |
.fieldoffset = offsetof(CPUARMState, cp15.c2_data), .resetvalue = 0, },
|
| 1155 |
{ .name = "ICACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
|
| 1156 |
.access = PL1_RW, |
| 1157 |
.fieldoffset = offsetof(CPUARMState, cp15.c2_insn), .resetvalue = 0, },
|
| 1158 |
/* Protection region base and size registers */
|
| 1159 |
{ .name = "946_PRBS", .cp = 15, .crn = 6, .crm = CP_ANY, .opc1 = 0,
|
| 1160 |
.opc2 = CP_ANY, .access = PL1_RW, |
| 1161 |
.readfn = arm946_prbs_read, .writefn = arm946_prbs_write, }, |
| 1162 |
REGINFO_SENTINEL |
| 1163 |
}; |
| 1164 |
|
| 1165 |
static int vmsa_ttbcr_raw_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1166 |
uint64_t value) |
| 1167 |
{
|
| 1168 |
int maskshift = extract32(value, 0, 3); |
| 1169 |
|
| 1170 |
if (arm_feature(env, ARM_FEATURE_LPAE)) {
|
| 1171 |
value &= ~((7 << 19) | (3 << 14) | (0xf << 3)); |
| 1172 |
} else {
|
| 1173 |
value &= 7;
|
| 1174 |
} |
| 1175 |
/* Note that we always calculate c2_mask and c2_base_mask, but
|
| 1176 |
* they are only used for short-descriptor tables (ie if EAE is 0);
|
| 1177 |
* for long-descriptor tables the TTBCR fields are used differently
|
| 1178 |
* and the c2_mask and c2_base_mask values are meaningless.
|
| 1179 |
*/
|
| 1180 |
env->cp15.c2_control = value; |
| 1181 |
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> maskshift);
|
| 1182 |
env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> maskshift);
|
| 1183 |
return 0; |
| 1184 |
} |
| 1185 |
|
| 1186 |
static int vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1187 |
uint64_t value) |
| 1188 |
{
|
| 1189 |
if (arm_feature(env, ARM_FEATURE_LPAE)) {
|
| 1190 |
/* With LPAE the TTBCR could result in a change of ASID
|
| 1191 |
* via the TTBCR.A1 bit, so do a TLB flush.
|
| 1192 |
*/
|
| 1193 |
tlb_flush(env, 1);
|
| 1194 |
} |
| 1195 |
return vmsa_ttbcr_raw_write(env, ri, value);
|
| 1196 |
} |
| 1197 |
|
| 1198 |
static void vmsa_ttbcr_reset(CPUARMState *env, const ARMCPRegInfo *ri) |
| 1199 |
{
|
| 1200 |
env->cp15.c2_base_mask = 0xffffc000u;
|
| 1201 |
env->cp15.c2_control = 0;
|
| 1202 |
env->cp15.c2_mask = 0;
|
| 1203 |
} |
| 1204 |
|
| 1205 |
static const ARMCPRegInfo vmsa_cp_reginfo[] = { |
| 1206 |
{ .name = "DFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 1207 |
.access = PL1_RW, |
| 1208 |
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
|
| 1209 |
{ .name = "IFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
|
| 1210 |
.access = PL1_RW, |
| 1211 |
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0, },
|
| 1212 |
{ .name = "TTBR0", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 1213 |
.access = PL1_RW, |
| 1214 |
.fieldoffset = offsetof(CPUARMState, cp15.c2_base0), .resetvalue = 0, },
|
| 1215 |
{ .name = "TTBR1", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
|
| 1216 |
.access = PL1_RW, |
| 1217 |
.fieldoffset = offsetof(CPUARMState, cp15.c2_base1), .resetvalue = 0, },
|
| 1218 |
{ .name = "TTBCR", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
|
| 1219 |
.access = PL1_RW, .writefn = vmsa_ttbcr_write, |
| 1220 |
.resetfn = vmsa_ttbcr_reset, .raw_writefn = vmsa_ttbcr_raw_write, |
| 1221 |
.fieldoffset = offsetof(CPUARMState, cp15.c2_control) }, |
| 1222 |
{ .name = "DFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 1223 |
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c6_data), |
| 1224 |
.resetvalue = 0, },
|
| 1225 |
REGINFO_SENTINEL |
| 1226 |
}; |
| 1227 |
|
| 1228 |
static int omap_ticonfig_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1229 |
uint64_t value) |
| 1230 |
{
|
| 1231 |
env->cp15.c15_ticonfig = value & 0xe7;
|
| 1232 |
/* The OS_TYPE bit in this register changes the reported CPUID! */
|
| 1233 |
env->cp15.c0_cpuid = (value & (1 << 5)) ? |
| 1234 |
ARM_CPUID_TI915T : ARM_CPUID_TI925T; |
| 1235 |
return 0; |
| 1236 |
} |
| 1237 |
|
| 1238 |
static int omap_threadid_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1239 |
uint64_t value) |
| 1240 |
{
|
| 1241 |
env->cp15.c15_threadid = value & 0xffff;
|
| 1242 |
return 0; |
| 1243 |
} |
| 1244 |
|
| 1245 |
static int omap_wfi_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1246 |
uint64_t value) |
| 1247 |
{
|
| 1248 |
/* Wait-for-interrupt (deprecated) */
|
| 1249 |
cpu_interrupt(CPU(arm_env_get_cpu(env)), CPU_INTERRUPT_HALT); |
| 1250 |
return 0; |
| 1251 |
} |
| 1252 |
|
| 1253 |
static int omap_cachemaint_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1254 |
uint64_t value) |
| 1255 |
{
|
| 1256 |
/* On OMAP there are registers indicating the max/min index of dcache lines
|
| 1257 |
* containing a dirty line; cache flush operations have to reset these.
|
| 1258 |
*/
|
| 1259 |
env->cp15.c15_i_max = 0x000;
|
| 1260 |
env->cp15.c15_i_min = 0xff0;
|
| 1261 |
return 0; |
| 1262 |
} |
| 1263 |
|
| 1264 |
static const ARMCPRegInfo omap_cp_reginfo[] = { |
| 1265 |
{ .name = "DFSR", .cp = 15, .crn = 5, .crm = CP_ANY,
|
| 1266 |
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_OVERRIDE, |
| 1267 |
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
|
| 1268 |
{ .name = "", .cp = 15, .crn = 15, .crm = 0, .opc1 = 0, .opc2 = 0,
|
| 1269 |
.access = PL1_RW, .type = ARM_CP_NOP }, |
| 1270 |
{ .name = "TICONFIG", .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0,
|
| 1271 |
.access = PL1_RW, |
| 1272 |
.fieldoffset = offsetof(CPUARMState, cp15.c15_ticonfig), .resetvalue = 0,
|
| 1273 |
.writefn = omap_ticonfig_write }, |
| 1274 |
{ .name = "IMAX", .cp = 15, .crn = 15, .crm = 2, .opc1 = 0, .opc2 = 0,
|
| 1275 |
.access = PL1_RW, |
| 1276 |
.fieldoffset = offsetof(CPUARMState, cp15.c15_i_max), .resetvalue = 0, },
|
| 1277 |
{ .name = "IMIN", .cp = 15, .crn = 15, .crm = 3, .opc1 = 0, .opc2 = 0,
|
| 1278 |
.access = PL1_RW, .resetvalue = 0xff0,
|
| 1279 |
.fieldoffset = offsetof(CPUARMState, cp15.c15_i_min) }, |
| 1280 |
{ .name = "THREADID", .cp = 15, .crn = 15, .crm = 4, .opc1 = 0, .opc2 = 0,
|
| 1281 |
.access = PL1_RW, |
| 1282 |
.fieldoffset = offsetof(CPUARMState, cp15.c15_threadid), .resetvalue = 0,
|
| 1283 |
.writefn = omap_threadid_write }, |
| 1284 |
{ .name = "TI925T_STATUS", .cp = 15, .crn = 15,
|
| 1285 |
.crm = 8, .opc1 = 0, .opc2 = 0, .access = PL1_RW, |
| 1286 |
.type = ARM_CP_NO_MIGRATE, |
| 1287 |
.readfn = arm_cp_read_zero, .writefn = omap_wfi_write, }, |
| 1288 |
/* TODO: Peripheral port remap register:
|
| 1289 |
* On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
|
| 1290 |
* base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff),
|
| 1291 |
* when MMU is off.
|
| 1292 |
*/
|
| 1293 |
{ .name = "OMAP_CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
|
| 1294 |
.opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
|
| 1295 |
.type = ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE, |
| 1296 |
.writefn = omap_cachemaint_write }, |
| 1297 |
{ .name = "C9", .cp = 15, .crn = 9,
|
| 1298 |
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, |
| 1299 |
.type = ARM_CP_CONST | ARM_CP_OVERRIDE, .resetvalue = 0 },
|
| 1300 |
REGINFO_SENTINEL |
| 1301 |
}; |
| 1302 |
|
| 1303 |
static int xscale_cpar_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1304 |
uint64_t value) |
| 1305 |
{
|
| 1306 |
value &= 0x3fff;
|
| 1307 |
if (env->cp15.c15_cpar != value) {
|
| 1308 |
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
|
| 1309 |
tb_flush(env); |
| 1310 |
env->cp15.c15_cpar = value; |
| 1311 |
} |
| 1312 |
return 0; |
| 1313 |
} |
| 1314 |
|
| 1315 |
static const ARMCPRegInfo xscale_cp_reginfo[] = { |
| 1316 |
{ .name = "XSCALE_CPAR",
|
| 1317 |
.cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0, .access = PL1_RW, |
| 1318 |
.fieldoffset = offsetof(CPUARMState, cp15.c15_cpar), .resetvalue = 0,
|
| 1319 |
.writefn = xscale_cpar_write, }, |
| 1320 |
{ .name = "XSCALE_AUXCR",
|
| 1321 |
.cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1, .access = PL1_RW, |
| 1322 |
.fieldoffset = offsetof(CPUARMState, cp15.c1_xscaleauxcr), |
| 1323 |
.resetvalue = 0, },
|
| 1324 |
REGINFO_SENTINEL |
| 1325 |
}; |
| 1326 |
|
| 1327 |
static const ARMCPRegInfo dummy_c15_cp_reginfo[] = { |
| 1328 |
/* RAZ/WI the whole crn=15 space, when we don't have a more specific
|
| 1329 |
* implementation of this implementation-defined space.
|
| 1330 |
* Ideally this should eventually disappear in favour of actually
|
| 1331 |
* implementing the correct behaviour for all cores.
|
| 1332 |
*/
|
| 1333 |
{ .name = "C15_IMPDEF", .cp = 15, .crn = 15,
|
| 1334 |
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, |
| 1335 |
.access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE, |
| 1336 |
.resetvalue = 0 },
|
| 1337 |
REGINFO_SENTINEL |
| 1338 |
}; |
| 1339 |
|
| 1340 |
static const ARMCPRegInfo cache_dirty_status_cp_reginfo[] = { |
| 1341 |
/* Cache status: RAZ because we have no cache so it's always clean */
|
| 1342 |
{ .name = "CDSR", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 6,
|
| 1343 |
.access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE, |
| 1344 |
.resetvalue = 0 },
|
| 1345 |
REGINFO_SENTINEL |
| 1346 |
}; |
| 1347 |
|
| 1348 |
static const ARMCPRegInfo cache_block_ops_cp_reginfo[] = { |
| 1349 |
/* We never have a a block transfer operation in progress */
|
| 1350 |
{ .name = "BXSR", .cp = 15, .crn = 7, .crm = 12, .opc1 = 0, .opc2 = 4,
|
| 1351 |
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE, |
| 1352 |
.resetvalue = 0 },
|
| 1353 |
/* The cache ops themselves: these all NOP for QEMU */
|
| 1354 |
{ .name = "IICR", .cp = 15, .crm = 5, .opc1 = 0,
|
| 1355 |
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, |
| 1356 |
{ .name = "IDCR", .cp = 15, .crm = 6, .opc1 = 0,
|
| 1357 |
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, |
| 1358 |
{ .name = "CDCR", .cp = 15, .crm = 12, .opc1 = 0,
|
| 1359 |
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, |
| 1360 |
{ .name = "PIR", .cp = 15, .crm = 12, .opc1 = 1,
|
| 1361 |
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, |
| 1362 |
{ .name = "PDR", .cp = 15, .crm = 12, .opc1 = 2,
|
| 1363 |
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, |
| 1364 |
{ .name = "CIDCR", .cp = 15, .crm = 14, .opc1 = 0,
|
| 1365 |
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, |
| 1366 |
REGINFO_SENTINEL |
| 1367 |
}; |
| 1368 |
|
| 1369 |
static const ARMCPRegInfo cache_test_clean_cp_reginfo[] = { |
| 1370 |
/* The cache test-and-clean instructions always return (1 << 30)
|
| 1371 |
* to indicate that there are no dirty cache lines.
|
| 1372 |
*/
|
| 1373 |
{ .name = "TC_DCACHE", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 3,
|
| 1374 |
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE, |
| 1375 |
.resetvalue = (1 << 30) }, |
| 1376 |
{ .name = "TCI_DCACHE", .cp = 15, .crn = 7, .crm = 14, .opc1 = 0, .opc2 = 3,
|
| 1377 |
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE, |
| 1378 |
.resetvalue = (1 << 30) }, |
| 1379 |
REGINFO_SENTINEL |
| 1380 |
}; |
| 1381 |
|
| 1382 |
static const ARMCPRegInfo strongarm_cp_reginfo[] = { |
| 1383 |
/* Ignore ReadBuffer accesses */
|
| 1384 |
{ .name = "C9_READBUFFER", .cp = 15, .crn = 9,
|
| 1385 |
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, |
| 1386 |
.access = PL1_RW, .resetvalue = 0,
|
| 1387 |
.type = ARM_CP_CONST | ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE }, |
| 1388 |
REGINFO_SENTINEL |
| 1389 |
}; |
| 1390 |
|
| 1391 |
static int mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1392 |
uint64_t *value) |
| 1393 |
{
|
| 1394 |
CPUState *cs = CPU(arm_env_get_cpu(env)); |
| 1395 |
uint32_t mpidr = cs->cpu_index; |
| 1396 |
/* We don't support setting cluster ID ([8..11])
|
| 1397 |
* so these bits always RAZ.
|
| 1398 |
*/
|
| 1399 |
if (arm_feature(env, ARM_FEATURE_V7MP)) {
|
| 1400 |
mpidr |= (1U << 31); |
| 1401 |
/* Cores which are uniprocessor (non-coherent)
|
| 1402 |
* but still implement the MP extensions set
|
| 1403 |
* bit 30. (For instance, A9UP.) However we do
|
| 1404 |
* not currently model any of those cores.
|
| 1405 |
*/
|
| 1406 |
} |
| 1407 |
*value = mpidr; |
| 1408 |
return 0; |
| 1409 |
} |
| 1410 |
|
| 1411 |
static const ARMCPRegInfo mpidr_cp_reginfo[] = { |
| 1412 |
{ .name = "MPIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 5,
|
| 1413 |
.access = PL1_R, .readfn = mpidr_read, .type = ARM_CP_NO_MIGRATE }, |
| 1414 |
REGINFO_SENTINEL |
| 1415 |
}; |
| 1416 |
|
| 1417 |
static int par64_read(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t *value) |
| 1418 |
{
|
| 1419 |
*value = ((uint64_t)env->cp15.c7_par_hi << 32) | env->cp15.c7_par;
|
| 1420 |
return 0; |
| 1421 |
} |
| 1422 |
|
| 1423 |
static int par64_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) |
| 1424 |
{
|
| 1425 |
env->cp15.c7_par_hi = value >> 32;
|
| 1426 |
env->cp15.c7_par = value; |
| 1427 |
return 0; |
| 1428 |
} |
| 1429 |
|
| 1430 |
static void par64_reset(CPUARMState *env, const ARMCPRegInfo *ri) |
| 1431 |
{
|
| 1432 |
env->cp15.c7_par_hi = 0;
|
| 1433 |
env->cp15.c7_par = 0;
|
| 1434 |
} |
| 1435 |
|
| 1436 |
static int ttbr064_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1437 |
uint64_t *value) |
| 1438 |
{
|
| 1439 |
*value = ((uint64_t)env->cp15.c2_base0_hi << 32) | env->cp15.c2_base0;
|
| 1440 |
return 0; |
| 1441 |
} |
| 1442 |
|
| 1443 |
static int ttbr064_raw_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1444 |
uint64_t value) |
| 1445 |
{
|
| 1446 |
env->cp15.c2_base0_hi = value >> 32;
|
| 1447 |
env->cp15.c2_base0 = value; |
| 1448 |
return 0; |
| 1449 |
} |
| 1450 |
|
| 1451 |
static int ttbr064_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1452 |
uint64_t value) |
| 1453 |
{
|
| 1454 |
/* Writes to the 64 bit format TTBRs may change the ASID */
|
| 1455 |
tlb_flush(env, 1);
|
| 1456 |
return ttbr064_raw_write(env, ri, value);
|
| 1457 |
} |
| 1458 |
|
| 1459 |
static void ttbr064_reset(CPUARMState *env, const ARMCPRegInfo *ri) |
| 1460 |
{
|
| 1461 |
env->cp15.c2_base0_hi = 0;
|
| 1462 |
env->cp15.c2_base0 = 0;
|
| 1463 |
} |
| 1464 |
|
| 1465 |
static int ttbr164_read(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1466 |
uint64_t *value) |
| 1467 |
{
|
| 1468 |
*value = ((uint64_t)env->cp15.c2_base1_hi << 32) | env->cp15.c2_base1;
|
| 1469 |
return 0; |
| 1470 |
} |
| 1471 |
|
| 1472 |
static int ttbr164_write(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1473 |
uint64_t value) |
| 1474 |
{
|
| 1475 |
env->cp15.c2_base1_hi = value >> 32;
|
| 1476 |
env->cp15.c2_base1 = value; |
| 1477 |
return 0; |
| 1478 |
} |
| 1479 |
|
| 1480 |
static void ttbr164_reset(CPUARMState *env, const ARMCPRegInfo *ri) |
| 1481 |
{
|
| 1482 |
env->cp15.c2_base1_hi = 0;
|
| 1483 |
env->cp15.c2_base1 = 0;
|
| 1484 |
} |
| 1485 |
|
| 1486 |
static const ARMCPRegInfo lpae_cp_reginfo[] = { |
| 1487 |
/* NOP AMAIR0/1: the override is because these clash with the rather
|
| 1488 |
* broadly specified TLB_LOCKDOWN entry in the generic cp_reginfo.
|
| 1489 |
*/
|
| 1490 |
{ .name = "AMAIR0", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 0,
|
| 1491 |
.access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE, |
| 1492 |
.resetvalue = 0 },
|
| 1493 |
{ .name = "AMAIR1", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 1,
|
| 1494 |
.access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE, |
| 1495 |
.resetvalue = 0 },
|
| 1496 |
/* 64 bit access versions of the (dummy) debug registers */
|
| 1497 |
{ .name = "DBGDRAR", .cp = 14, .crm = 1, .opc1 = 0,
|
| 1498 |
.access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
|
| 1499 |
{ .name = "DBGDSAR", .cp = 14, .crm = 2, .opc1 = 0,
|
| 1500 |
.access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
|
| 1501 |
{ .name = "PAR", .cp = 15, .crm = 7, .opc1 = 0,
|
| 1502 |
.access = PL1_RW, .type = ARM_CP_64BIT, |
| 1503 |
.readfn = par64_read, .writefn = par64_write, .resetfn = par64_reset }, |
| 1504 |
{ .name = "TTBR0", .cp = 15, .crm = 2, .opc1 = 0,
|
| 1505 |
.access = PL1_RW, .type = ARM_CP_64BIT, .readfn = ttbr064_read, |
| 1506 |
.writefn = ttbr064_write, .raw_writefn = ttbr064_raw_write, |
| 1507 |
.resetfn = ttbr064_reset }, |
| 1508 |
{ .name = "TTBR1", .cp = 15, .crm = 2, .opc1 = 1,
|
| 1509 |
.access = PL1_RW, .type = ARM_CP_64BIT, .readfn = ttbr164_read, |
| 1510 |
.writefn = ttbr164_write, .resetfn = ttbr164_reset }, |
| 1511 |
REGINFO_SENTINEL |
| 1512 |
}; |
| 1513 |
|
| 1514 |
static int sctlr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) |
| 1515 |
{
|
| 1516 |
env->cp15.c1_sys = value; |
| 1517 |
/* ??? Lots of these bits are not implemented. */
|
| 1518 |
/* This may enable/disable the MMU, so do a TLB flush. */
|
| 1519 |
tlb_flush(env, 1);
|
| 1520 |
return 0; |
| 1521 |
} |
| 1522 |
|
| 1523 |
void register_cp_regs_for_features(ARMCPU *cpu)
|
| 1524 |
{
|
| 1525 |
/* Register all the coprocessor registers based on feature bits */
|
| 1526 |
CPUARMState *env = &cpu->env; |
| 1527 |
if (arm_feature(env, ARM_FEATURE_M)) {
|
| 1528 |
/* M profile has no coprocessor registers */
|
| 1529 |
return;
|
| 1530 |
} |
| 1531 |
|
| 1532 |
define_arm_cp_regs(cpu, cp_reginfo); |
| 1533 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
| 1534 |
/* The ID registers all have impdef reset values */
|
| 1535 |
ARMCPRegInfo v6_idregs[] = {
|
| 1536 |
{ .name = "ID_PFR0", .cp = 15, .crn = 0, .crm = 1,
|
| 1537 |
.opc1 = 0, .opc2 = 0, .access = PL1_R, .type = ARM_CP_CONST, |
| 1538 |
.resetvalue = cpu->id_pfr0 }, |
| 1539 |
{ .name = "ID_PFR1", .cp = 15, .crn = 0, .crm = 1,
|
| 1540 |
.opc1 = 0, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST, |
| 1541 |
.resetvalue = cpu->id_pfr1 }, |
| 1542 |
{ .name = "ID_DFR0", .cp = 15, .crn = 0, .crm = 1,
|
| 1543 |
.opc1 = 0, .opc2 = 2, .access = PL1_R, .type = ARM_CP_CONST, |
| 1544 |
.resetvalue = cpu->id_dfr0 }, |
| 1545 |
{ .name = "ID_AFR0", .cp = 15, .crn = 0, .crm = 1,
|
| 1546 |
.opc1 = 0, .opc2 = 3, .access = PL1_R, .type = ARM_CP_CONST, |
| 1547 |
.resetvalue = cpu->id_afr0 }, |
| 1548 |
{ .name = "ID_MMFR0", .cp = 15, .crn = 0, .crm = 1,
|
| 1549 |
.opc1 = 0, .opc2 = 4, .access = PL1_R, .type = ARM_CP_CONST, |
| 1550 |
.resetvalue = cpu->id_mmfr0 }, |
| 1551 |
{ .name = "ID_MMFR1", .cp = 15, .crn = 0, .crm = 1,
|
| 1552 |
.opc1 = 0, .opc2 = 5, .access = PL1_R, .type = ARM_CP_CONST, |
| 1553 |
.resetvalue = cpu->id_mmfr1 }, |
| 1554 |
{ .name = "ID_MMFR2", .cp = 15, .crn = 0, .crm = 1,
|
| 1555 |
.opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST, |
| 1556 |
.resetvalue = cpu->id_mmfr2 }, |
| 1557 |
{ .name = "ID_MMFR3", .cp = 15, .crn = 0, .crm = 1,
|
| 1558 |
.opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST, |
| 1559 |
.resetvalue = cpu->id_mmfr3 }, |
| 1560 |
{ .name = "ID_ISAR0", .cp = 15, .crn = 0, .crm = 2,
|
| 1561 |
.opc1 = 0, .opc2 = 0, .access = PL1_R, .type = ARM_CP_CONST, |
| 1562 |
.resetvalue = cpu->id_isar0 }, |
| 1563 |
{ .name = "ID_ISAR1", .cp = 15, .crn = 0, .crm = 2,
|
| 1564 |
.opc1 = 0, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST, |
| 1565 |
.resetvalue = cpu->id_isar1 }, |
| 1566 |
{ .name = "ID_ISAR2", .cp = 15, .crn = 0, .crm = 2,
|
| 1567 |
.opc1 = 0, .opc2 = 2, .access = PL1_R, .type = ARM_CP_CONST, |
| 1568 |
.resetvalue = cpu->id_isar2 }, |
| 1569 |
{ .name = "ID_ISAR3", .cp = 15, .crn = 0, .crm = 2,
|
| 1570 |
.opc1 = 0, .opc2 = 3, .access = PL1_R, .type = ARM_CP_CONST, |
| 1571 |
.resetvalue = cpu->id_isar3 }, |
| 1572 |
{ .name = "ID_ISAR4", .cp = 15, .crn = 0, .crm = 2,
|
| 1573 |
.opc1 = 0, .opc2 = 4, .access = PL1_R, .type = ARM_CP_CONST, |
| 1574 |
.resetvalue = cpu->id_isar4 }, |
| 1575 |
{ .name = "ID_ISAR5", .cp = 15, .crn = 0, .crm = 2,
|
| 1576 |
.opc1 = 0, .opc2 = 5, .access = PL1_R, .type = ARM_CP_CONST, |
| 1577 |
.resetvalue = cpu->id_isar5 }, |
| 1578 |
/* 6..7 are as yet unallocated and must RAZ */
|
| 1579 |
{ .name = "ID_ISAR6", .cp = 15, .crn = 0, .crm = 2,
|
| 1580 |
.opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST, |
| 1581 |
.resetvalue = 0 },
|
| 1582 |
{ .name = "ID_ISAR7", .cp = 15, .crn = 0, .crm = 2,
|
| 1583 |
.opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST, |
| 1584 |
.resetvalue = 0 },
|
| 1585 |
REGINFO_SENTINEL |
| 1586 |
}; |
| 1587 |
define_arm_cp_regs(cpu, v6_idregs); |
| 1588 |
define_arm_cp_regs(cpu, v6_cp_reginfo); |
| 1589 |
} else {
|
| 1590 |
define_arm_cp_regs(cpu, not_v6_cp_reginfo); |
| 1591 |
} |
| 1592 |
if (arm_feature(env, ARM_FEATURE_V6K)) {
|
| 1593 |
define_arm_cp_regs(cpu, v6k_cp_reginfo); |
| 1594 |
} |
| 1595 |
if (arm_feature(env, ARM_FEATURE_V7)) {
|
| 1596 |
/* v7 performance monitor control register: same implementor
|
| 1597 |
* field as main ID register, and we implement no event counters.
|
| 1598 |
*/
|
| 1599 |
ARMCPRegInfo pmcr = {
|
| 1600 |
.name = "PMCR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 0, |
| 1601 |
.access = PL0_RW, .resetvalue = cpu->midr & 0xff000000,
|
| 1602 |
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcr), |
| 1603 |
.readfn = pmreg_read, .writefn = pmcr_write, |
| 1604 |
.raw_readfn = raw_read, .raw_writefn = raw_write, |
| 1605 |
}; |
| 1606 |
ARMCPRegInfo clidr = {
|
| 1607 |
.name = "CLIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 1, |
| 1608 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->clidr |
| 1609 |
}; |
| 1610 |
define_one_arm_cp_reg(cpu, &pmcr); |
| 1611 |
define_one_arm_cp_reg(cpu, &clidr); |
| 1612 |
define_arm_cp_regs(cpu, v7_cp_reginfo); |
| 1613 |
} else {
|
| 1614 |
define_arm_cp_regs(cpu, not_v7_cp_reginfo); |
| 1615 |
} |
| 1616 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
| 1617 |
/* These are the MPU registers prior to PMSAv6. Any new
|
| 1618 |
* PMSA core later than the ARM946 will require that we
|
| 1619 |
* implement the PMSAv6 or PMSAv7 registers, which are
|
| 1620 |
* completely different.
|
| 1621 |
*/
|
| 1622 |
assert(!arm_feature(env, ARM_FEATURE_V6)); |
| 1623 |
define_arm_cp_regs(cpu, pmsav5_cp_reginfo); |
| 1624 |
} else {
|
| 1625 |
define_arm_cp_regs(cpu, vmsa_cp_reginfo); |
| 1626 |
} |
| 1627 |
if (arm_feature(env, ARM_FEATURE_THUMB2EE)) {
|
| 1628 |
define_arm_cp_regs(cpu, t2ee_cp_reginfo); |
| 1629 |
} |
| 1630 |
if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) {
|
| 1631 |
define_arm_cp_regs(cpu, generic_timer_cp_reginfo); |
| 1632 |
} |
| 1633 |
if (arm_feature(env, ARM_FEATURE_VAPA)) {
|
| 1634 |
define_arm_cp_regs(cpu, vapa_cp_reginfo); |
| 1635 |
} |
| 1636 |
if (arm_feature(env, ARM_FEATURE_CACHE_TEST_CLEAN)) {
|
| 1637 |
define_arm_cp_regs(cpu, cache_test_clean_cp_reginfo); |
| 1638 |
} |
| 1639 |
if (arm_feature(env, ARM_FEATURE_CACHE_DIRTY_REG)) {
|
| 1640 |
define_arm_cp_regs(cpu, cache_dirty_status_cp_reginfo); |
| 1641 |
} |
| 1642 |
if (arm_feature(env, ARM_FEATURE_CACHE_BLOCK_OPS)) {
|
| 1643 |
define_arm_cp_regs(cpu, cache_block_ops_cp_reginfo); |
| 1644 |
} |
| 1645 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
| 1646 |
define_arm_cp_regs(cpu, omap_cp_reginfo); |
| 1647 |
} |
| 1648 |
if (arm_feature(env, ARM_FEATURE_STRONGARM)) {
|
| 1649 |
define_arm_cp_regs(cpu, strongarm_cp_reginfo); |
| 1650 |
} |
| 1651 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 1652 |
define_arm_cp_regs(cpu, xscale_cp_reginfo); |
| 1653 |
} |
| 1654 |
if (arm_feature(env, ARM_FEATURE_DUMMY_C15_REGS)) {
|
| 1655 |
define_arm_cp_regs(cpu, dummy_c15_cp_reginfo); |
| 1656 |
} |
| 1657 |
if (arm_feature(env, ARM_FEATURE_LPAE)) {
|
| 1658 |
define_arm_cp_regs(cpu, lpae_cp_reginfo); |
| 1659 |
} |
| 1660 |
/* Slightly awkwardly, the OMAP and StrongARM cores need all of
|
| 1661 |
* cp15 crn=0 to be writes-ignored, whereas for other cores they should
|
| 1662 |
* be read-only (ie write causes UNDEF exception).
|
| 1663 |
*/
|
| 1664 |
{
|
| 1665 |
ARMCPRegInfo id_cp_reginfo[] = {
|
| 1666 |
/* Note that the MIDR isn't a simple constant register because
|
| 1667 |
* of the TI925 behaviour where writes to another register can
|
| 1668 |
* cause the MIDR value to change.
|
| 1669 |
*
|
| 1670 |
* Unimplemented registers in the c15 0 0 0 space default to
|
| 1671 |
* MIDR. Define MIDR first as this entire space, then CTR, TCMTR
|
| 1672 |
* and friends override accordingly.
|
| 1673 |
*/
|
| 1674 |
{ .name = "MIDR",
|
| 1675 |
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = CP_ANY, |
| 1676 |
.access = PL1_R, .resetvalue = cpu->midr, |
| 1677 |
.writefn = arm_cp_write_ignore, .raw_writefn = raw_write, |
| 1678 |
.fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid), |
| 1679 |
.type = ARM_CP_OVERRIDE }, |
| 1680 |
{ .name = "CTR",
|
| 1681 |
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 1, |
| 1682 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->ctr }, |
| 1683 |
{ .name = "TCMTR",
|
| 1684 |
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 2, |
| 1685 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 1686 |
{ .name = "TLBTR",
|
| 1687 |
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 3, |
| 1688 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 1689 |
/* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
|
| 1690 |
{ .name = "DUMMY",
|
| 1691 |
.cp = 15, .crn = 0, .crm = 3, .opc1 = 0, .opc2 = CP_ANY, |
| 1692 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 1693 |
{ .name = "DUMMY",
|
| 1694 |
.cp = 15, .crn = 0, .crm = 4, .opc1 = 0, .opc2 = CP_ANY, |
| 1695 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 1696 |
{ .name = "DUMMY",
|
| 1697 |
.cp = 15, .crn = 0, .crm = 5, .opc1 = 0, .opc2 = CP_ANY, |
| 1698 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 1699 |
{ .name = "DUMMY",
|
| 1700 |
.cp = 15, .crn = 0, .crm = 6, .opc1 = 0, .opc2 = CP_ANY, |
| 1701 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 1702 |
{ .name = "DUMMY",
|
| 1703 |
.cp = 15, .crn = 0, .crm = 7, .opc1 = 0, .opc2 = CP_ANY, |
| 1704 |
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
| 1705 |
REGINFO_SENTINEL |
| 1706 |
}; |
| 1707 |
ARMCPRegInfo crn0_wi_reginfo = {
|
| 1708 |
.name = "CRN0_WI", .cp = 15, .crn = 0, .crm = CP_ANY, |
| 1709 |
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_W, |
| 1710 |
.type = ARM_CP_NOP | ARM_CP_OVERRIDE |
| 1711 |
}; |
| 1712 |
if (arm_feature(env, ARM_FEATURE_OMAPCP) ||
|
| 1713 |
arm_feature(env, ARM_FEATURE_STRONGARM)) {
|
| 1714 |
ARMCPRegInfo *r; |
| 1715 |
/* Register the blanket "writes ignored" value first to cover the
|
| 1716 |
* whole space. Then update the specific ID registers to allow write
|
| 1717 |
* access, so that they ignore writes rather than causing them to
|
| 1718 |
* UNDEF.
|
| 1719 |
*/
|
| 1720 |
define_one_arm_cp_reg(cpu, &crn0_wi_reginfo); |
| 1721 |
for (r = id_cp_reginfo; r->type != ARM_CP_SENTINEL; r++) {
|
| 1722 |
r->access = PL1_RW; |
| 1723 |
} |
| 1724 |
} |
| 1725 |
define_arm_cp_regs(cpu, id_cp_reginfo); |
| 1726 |
} |
| 1727 |
|
| 1728 |
if (arm_feature(env, ARM_FEATURE_MPIDR)) {
|
| 1729 |
define_arm_cp_regs(cpu, mpidr_cp_reginfo); |
| 1730 |
} |
| 1731 |
|
| 1732 |
if (arm_feature(env, ARM_FEATURE_AUXCR)) {
|
| 1733 |
ARMCPRegInfo auxcr = {
|
| 1734 |
.name = "AUXCR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1, |
| 1735 |
.access = PL1_RW, .type = ARM_CP_CONST, |
| 1736 |
.resetvalue = cpu->reset_auxcr |
| 1737 |
}; |
| 1738 |
define_one_arm_cp_reg(cpu, &auxcr); |
| 1739 |
} |
| 1740 |
|
| 1741 |
/* Generic registers whose values depend on the implementation */
|
| 1742 |
{
|
| 1743 |
ARMCPRegInfo sctlr = {
|
| 1744 |
.name = "SCTLR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0, |
| 1745 |
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_sys), |
| 1746 |
.writefn = sctlr_write, .resetvalue = cpu->reset_sctlr, |
| 1747 |
.raw_writefn = raw_write, |
| 1748 |
}; |
| 1749 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 1750 |
/* Normally we would always end the TB on an SCTLR write, but Linux
|
| 1751 |
* arch/arm/mach-pxa/sleep.S expects two instructions following
|
| 1752 |
* an MMU enable to execute from cache. Imitate this behaviour.
|
| 1753 |
*/
|
| 1754 |
sctlr.type |= ARM_CP_SUPPRESS_TB_END; |
| 1755 |
} |
| 1756 |
define_one_arm_cp_reg(cpu, &sctlr); |
| 1757 |
} |
| 1758 |
} |
| 1759 |
|
| 1760 |
ARMCPU *cpu_arm_init(const char *cpu_model) |
| 1761 |
{
|
| 1762 |
ARMCPU *cpu; |
| 1763 |
ObjectClass *oc; |
| 1764 |
|
| 1765 |
oc = cpu_class_by_name(TYPE_ARM_CPU, cpu_model); |
| 1766 |
if (!oc) {
|
| 1767 |
return NULL; |
| 1768 |
} |
| 1769 |
cpu = ARM_CPU(object_new(object_class_get_name(oc))); |
| 1770 |
|
| 1771 |
/* TODO this should be set centrally, once possible */
|
| 1772 |
object_property_set_bool(OBJECT(cpu), true, "realized", NULL); |
| 1773 |
|
| 1774 |
return cpu;
|
| 1775 |
} |
| 1776 |
|
| 1777 |
void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu)
|
| 1778 |
{
|
| 1779 |
CPUState *cs = CPU(cpu); |
| 1780 |
CPUARMState *env = &cpu->env; |
| 1781 |
|
| 1782 |
if (arm_feature(env, ARM_FEATURE_NEON)) {
|
| 1783 |
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg, |
| 1784 |
51, "arm-neon.xml", 0); |
| 1785 |
} else if (arm_feature(env, ARM_FEATURE_VFP3)) { |
| 1786 |
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg, |
| 1787 |
35, "arm-vfp3.xml", 0); |
| 1788 |
} else if (arm_feature(env, ARM_FEATURE_VFP)) { |
| 1789 |
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg, |
| 1790 |
19, "arm-vfp.xml", 0); |
| 1791 |
} |
| 1792 |
} |
| 1793 |
|
| 1794 |
/* Sort alphabetically by type name, except for "any". */
|
| 1795 |
static gint arm_cpu_list_compare(gconstpointer a, gconstpointer b)
|
| 1796 |
{
|
| 1797 |
ObjectClass *class_a = (ObjectClass *)a; |
| 1798 |
ObjectClass *class_b = (ObjectClass *)b; |
| 1799 |
const char *name_a, *name_b; |
| 1800 |
|
| 1801 |
name_a = object_class_get_name(class_a); |
| 1802 |
name_b = object_class_get_name(class_b); |
| 1803 |
if (strcmp(name_a, "any-" TYPE_ARM_CPU) == 0) { |
| 1804 |
return 1; |
| 1805 |
} else if (strcmp(name_b, "any-" TYPE_ARM_CPU) == 0) { |
| 1806 |
return -1; |
| 1807 |
} else {
|
| 1808 |
return strcmp(name_a, name_b);
|
| 1809 |
} |
| 1810 |
} |
| 1811 |
|
| 1812 |
static void arm_cpu_list_entry(gpointer data, gpointer user_data) |
| 1813 |
{
|
| 1814 |
ObjectClass *oc = data; |
| 1815 |
CPUListState *s = user_data; |
| 1816 |
const char *typename; |
| 1817 |
char *name;
|
| 1818 |
|
| 1819 |
typename = object_class_get_name(oc); |
| 1820 |
name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_ARM_CPU));
|
| 1821 |
(*s->cpu_fprintf)(s->file, " %s\n",
|
| 1822 |
name); |
| 1823 |
g_free(name); |
| 1824 |
} |
| 1825 |
|
| 1826 |
void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
|
| 1827 |
{
|
| 1828 |
CPUListState s = {
|
| 1829 |
.file = f, |
| 1830 |
.cpu_fprintf = cpu_fprintf, |
| 1831 |
}; |
| 1832 |
GSList *list; |
| 1833 |
|
| 1834 |
list = object_class_get_list(TYPE_ARM_CPU, false);
|
| 1835 |
list = g_slist_sort(list, arm_cpu_list_compare); |
| 1836 |
(*cpu_fprintf)(f, "Available CPUs:\n");
|
| 1837 |
g_slist_foreach(list, arm_cpu_list_entry, &s); |
| 1838 |
g_slist_free(list); |
| 1839 |
} |
| 1840 |
|
| 1841 |
static void arm_cpu_add_definition(gpointer data, gpointer user_data) |
| 1842 |
{
|
| 1843 |
ObjectClass *oc = data; |
| 1844 |
CpuDefinitionInfoList **cpu_list = user_data; |
| 1845 |
CpuDefinitionInfoList *entry; |
| 1846 |
CpuDefinitionInfo *info; |
| 1847 |
const char *typename; |
| 1848 |
|
| 1849 |
typename = object_class_get_name(oc); |
| 1850 |
info = g_malloc0(sizeof(*info));
|
| 1851 |
info->name = g_strndup(typename, |
| 1852 |
strlen(typename) - strlen("-" TYPE_ARM_CPU));
|
| 1853 |
|
| 1854 |
entry = g_malloc0(sizeof(*entry));
|
| 1855 |
entry->value = info; |
| 1856 |
entry->next = *cpu_list; |
| 1857 |
*cpu_list = entry; |
| 1858 |
} |
| 1859 |
|
| 1860 |
CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp) |
| 1861 |
{
|
| 1862 |
CpuDefinitionInfoList *cpu_list = NULL;
|
| 1863 |
GSList *list; |
| 1864 |
|
| 1865 |
list = object_class_get_list(TYPE_ARM_CPU, false);
|
| 1866 |
g_slist_foreach(list, arm_cpu_add_definition, &cpu_list); |
| 1867 |
g_slist_free(list); |
| 1868 |
|
| 1869 |
return cpu_list;
|
| 1870 |
} |
| 1871 |
|
| 1872 |
void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
|
| 1873 |
const ARMCPRegInfo *r, void *opaque) |
| 1874 |
{
|
| 1875 |
/* Define implementations of coprocessor registers.
|
| 1876 |
* We store these in a hashtable because typically
|
| 1877 |
* there are less than 150 registers in a space which
|
| 1878 |
* is 16*16*16*8*8 = 262144 in size.
|
| 1879 |
* Wildcarding is supported for the crm, opc1 and opc2 fields.
|
| 1880 |
* If a register is defined twice then the second definition is
|
| 1881 |
* used, so this can be used to define some generic registers and
|
| 1882 |
* then override them with implementation specific variations.
|
| 1883 |
* At least one of the original and the second definition should
|
| 1884 |
* include ARM_CP_OVERRIDE in its type bits -- this is just a guard
|
| 1885 |
* against accidental use.
|
| 1886 |
*/
|
| 1887 |
int crm, opc1, opc2;
|
| 1888 |
int crmmin = (r->crm == CP_ANY) ? 0 : r->crm; |
| 1889 |
int crmmax = (r->crm == CP_ANY) ? 15 : r->crm; |
| 1890 |
int opc1min = (r->opc1 == CP_ANY) ? 0 : r->opc1; |
| 1891 |
int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1; |
| 1892 |
int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2; |
| 1893 |
int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2; |
| 1894 |
/* 64 bit registers have only CRm and Opc1 fields */
|
| 1895 |
assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn))); |
| 1896 |
/* Check that the register definition has enough info to handle
|
| 1897 |
* reads and writes if they are permitted.
|
| 1898 |
*/
|
| 1899 |
if (!(r->type & (ARM_CP_SPECIAL|ARM_CP_CONST))) {
|
| 1900 |
if (r->access & PL3_R) {
|
| 1901 |
assert(r->fieldoffset || r->readfn); |
| 1902 |
} |
| 1903 |
if (r->access & PL3_W) {
|
| 1904 |
assert(r->fieldoffset || r->writefn); |
| 1905 |
} |
| 1906 |
} |
| 1907 |
/* Bad type field probably means missing sentinel at end of reg list */
|
| 1908 |
assert(cptype_valid(r->type)); |
| 1909 |
for (crm = crmmin; crm <= crmmax; crm++) {
|
| 1910 |
for (opc1 = opc1min; opc1 <= opc1max; opc1++) {
|
| 1911 |
for (opc2 = opc2min; opc2 <= opc2max; opc2++) {
|
| 1912 |
uint32_t *key = g_new(uint32_t, 1);
|
| 1913 |
ARMCPRegInfo *r2 = g_memdup(r, sizeof(ARMCPRegInfo));
|
| 1914 |
int is64 = (r->type & ARM_CP_64BIT) ? 1 : 0; |
| 1915 |
*key = ENCODE_CP_REG(r->cp, is64, r->crn, crm, opc1, opc2); |
| 1916 |
if (opaque) {
|
| 1917 |
r2->opaque = opaque; |
| 1918 |
} |
| 1919 |
/* Make sure reginfo passed to helpers for wildcarded regs
|
| 1920 |
* has the correct crm/opc1/opc2 for this reg, not CP_ANY:
|
| 1921 |
*/
|
| 1922 |
r2->crm = crm; |
| 1923 |
r2->opc1 = opc1; |
| 1924 |
r2->opc2 = opc2; |
| 1925 |
/* By convention, for wildcarded registers only the first
|
| 1926 |
* entry is used for migration; the others are marked as
|
| 1927 |
* NO_MIGRATE so we don't try to transfer the register
|
| 1928 |
* multiple times. Special registers (ie NOP/WFI) are
|
| 1929 |
* never migratable.
|
| 1930 |
*/
|
| 1931 |
if ((r->type & ARM_CP_SPECIAL) ||
|
| 1932 |
((r->crm == CP_ANY) && crm != 0) ||
|
| 1933 |
((r->opc1 == CP_ANY) && opc1 != 0) ||
|
| 1934 |
((r->opc2 == CP_ANY) && opc2 != 0)) {
|
| 1935 |
r2->type |= ARM_CP_NO_MIGRATE; |
| 1936 |
} |
| 1937 |
|
| 1938 |
/* Overriding of an existing definition must be explicitly
|
| 1939 |
* requested.
|
| 1940 |
*/
|
| 1941 |
if (!(r->type & ARM_CP_OVERRIDE)) {
|
| 1942 |
ARMCPRegInfo *oldreg; |
| 1943 |
oldreg = g_hash_table_lookup(cpu->cp_regs, key); |
| 1944 |
if (oldreg && !(oldreg->type & ARM_CP_OVERRIDE)) {
|
| 1945 |
fprintf(stderr, "Register redefined: cp=%d %d bit "
|
| 1946 |
"crn=%d crm=%d opc1=%d opc2=%d, "
|
| 1947 |
"was %s, now %s\n", r2->cp, 32 + 32 * is64, |
| 1948 |
r2->crn, r2->crm, r2->opc1, r2->opc2, |
| 1949 |
oldreg->name, r2->name); |
| 1950 |
g_assert_not_reached(); |
| 1951 |
} |
| 1952 |
} |
| 1953 |
g_hash_table_insert(cpu->cp_regs, key, r2); |
| 1954 |
} |
| 1955 |
} |
| 1956 |
} |
| 1957 |
} |
| 1958 |
|
| 1959 |
void define_arm_cp_regs_with_opaque(ARMCPU *cpu,
|
| 1960 |
const ARMCPRegInfo *regs, void *opaque) |
| 1961 |
{
|
| 1962 |
/* Define a whole list of registers */
|
| 1963 |
const ARMCPRegInfo *r;
|
| 1964 |
for (r = regs; r->type != ARM_CP_SENTINEL; r++) {
|
| 1965 |
define_one_arm_cp_reg_with_opaque(cpu, r, opaque); |
| 1966 |
} |
| 1967 |
} |
| 1968 |
|
| 1969 |
const ARMCPRegInfo *get_arm_cp_reginfo(ARMCPU *cpu, uint32_t encoded_cp)
|
| 1970 |
{
|
| 1971 |
return g_hash_table_lookup(cpu->cp_regs, &encoded_cp);
|
| 1972 |
} |
| 1973 |
|
| 1974 |
int arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri, |
| 1975 |
uint64_t value) |
| 1976 |
{
|
| 1977 |
/* Helper coprocessor write function for write-ignore registers */
|
| 1978 |
return 0; |
| 1979 |
} |
| 1980 |
|
| 1981 |
int arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t *value) |
| 1982 |
{
|
| 1983 |
/* Helper coprocessor write function for read-as-zero registers */
|
| 1984 |
*value = 0;
|
| 1985 |
return 0; |
| 1986 |
} |
| 1987 |
|
| 1988 |
static int bad_mode_switch(CPUARMState *env, int mode) |
| 1989 |
{
|
| 1990 |
/* Return true if it is not valid for us to switch to
|
| 1991 |
* this CPU mode (ie all the UNPREDICTABLE cases in
|
| 1992 |
* the ARM ARM CPSRWriteByInstr pseudocode).
|
| 1993 |
*/
|
| 1994 |
switch (mode) {
|
| 1995 |
case ARM_CPU_MODE_USR:
|
| 1996 |
case ARM_CPU_MODE_SYS:
|
| 1997 |
case ARM_CPU_MODE_SVC:
|
| 1998 |
case ARM_CPU_MODE_ABT:
|
| 1999 |
case ARM_CPU_MODE_UND:
|
| 2000 |
case ARM_CPU_MODE_IRQ:
|
| 2001 |
case ARM_CPU_MODE_FIQ:
|
| 2002 |
return 0; |
| 2003 |
default:
|
| 2004 |
return 1; |
| 2005 |
} |
| 2006 |
} |
| 2007 |
|
| 2008 |
uint32_t cpsr_read(CPUARMState *env) |
| 2009 |
{
|
| 2010 |
int ZF;
|
| 2011 |
ZF = (env->ZF == 0);
|
| 2012 |
return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) | |
| 2013 |
(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27) |
| 2014 |
| (env->thumb << 5) | ((env->condexec_bits & 3) << 25) |
| 2015 |
| ((env->condexec_bits & 0xfc) << 8) |
| 2016 |
| (env->GE << 16);
|
| 2017 |
} |
| 2018 |
|
| 2019 |
void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
|
| 2020 |
{
|
| 2021 |
if (mask & CPSR_NZCV) {
|
| 2022 |
env->ZF = (~val) & CPSR_Z; |
| 2023 |
env->NF = val; |
| 2024 |
env->CF = (val >> 29) & 1; |
| 2025 |
env->VF = (val << 3) & 0x80000000; |
| 2026 |
} |
| 2027 |
if (mask & CPSR_Q)
|
| 2028 |
env->QF = ((val & CPSR_Q) != 0);
|
| 2029 |
if (mask & CPSR_T)
|
| 2030 |
env->thumb = ((val & CPSR_T) != 0);
|
| 2031 |
if (mask & CPSR_IT_0_1) {
|
| 2032 |
env->condexec_bits &= ~3;
|
| 2033 |
env->condexec_bits |= (val >> 25) & 3; |
| 2034 |
} |
| 2035 |
if (mask & CPSR_IT_2_7) {
|
| 2036 |
env->condexec_bits &= 3;
|
| 2037 |
env->condexec_bits |= (val >> 8) & 0xfc; |
| 2038 |
} |
| 2039 |
if (mask & CPSR_GE) {
|
| 2040 |
env->GE = (val >> 16) & 0xf; |
| 2041 |
} |
| 2042 |
|
| 2043 |
if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
|
| 2044 |
if (bad_mode_switch(env, val & CPSR_M)) {
|
| 2045 |
/* Attempt to switch to an invalid mode: this is UNPREDICTABLE.
|
| 2046 |
* We choose to ignore the attempt and leave the CPSR M field
|
| 2047 |
* untouched.
|
| 2048 |
*/
|
| 2049 |
mask &= ~CPSR_M; |
| 2050 |
} else {
|
| 2051 |
switch_mode(env, val & CPSR_M); |
| 2052 |
} |
| 2053 |
} |
| 2054 |
mask &= ~CACHED_CPSR_BITS; |
| 2055 |
env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask); |
| 2056 |
} |
| 2057 |
|
| 2058 |
/* Sign/zero extend */
|
| 2059 |
uint32_t HELPER(sxtb16)(uint32_t x) |
| 2060 |
{
|
| 2061 |
uint32_t res; |
| 2062 |
res = (uint16_t)(int8_t)x; |
| 2063 |
res |= (uint32_t)(int8_t)(x >> 16) << 16; |
| 2064 |
return res;
|
| 2065 |
} |
| 2066 |
|
| 2067 |
uint32_t HELPER(uxtb16)(uint32_t x) |
| 2068 |
{
|
| 2069 |
uint32_t res; |
| 2070 |
res = (uint16_t)(uint8_t)x; |
| 2071 |
res |= (uint32_t)(uint8_t)(x >> 16) << 16; |
| 2072 |
return res;
|
| 2073 |
} |
| 2074 |
|
| 2075 |
uint32_t HELPER(clz)(uint32_t x) |
| 2076 |
{
|
| 2077 |
return clz32(x);
|
| 2078 |
} |
| 2079 |
|
| 2080 |
int32_t HELPER(sdiv)(int32_t num, int32_t den) |
| 2081 |
{
|
| 2082 |
if (den == 0) |
| 2083 |
return 0; |
| 2084 |
if (num == INT_MIN && den == -1) |
| 2085 |
return INT_MIN;
|
| 2086 |
return num / den;
|
| 2087 |
} |
| 2088 |
|
| 2089 |
uint32_t HELPER(udiv)(uint32_t num, uint32_t den) |
| 2090 |
{
|
| 2091 |
if (den == 0) |
| 2092 |
return 0; |
| 2093 |
return num / den;
|
| 2094 |
} |
| 2095 |
|
| 2096 |
uint32_t HELPER(rbit)(uint32_t x) |
| 2097 |
{
|
| 2098 |
x = ((x & 0xff000000) >> 24) |
| 2099 |
| ((x & 0x00ff0000) >> 8) |
| 2100 |
| ((x & 0x0000ff00) << 8) |
| 2101 |
| ((x & 0x000000ff) << 24); |
| 2102 |
x = ((x & 0xf0f0f0f0) >> 4) |
| 2103 |
| ((x & 0x0f0f0f0f) << 4); |
| 2104 |
x = ((x & 0x88888888) >> 3) |
| 2105 |
| ((x & 0x44444444) >> 1) |
| 2106 |
| ((x & 0x22222222) << 1) |
| 2107 |
| ((x & 0x11111111) << 3); |
| 2108 |
return x;
|
| 2109 |
} |
| 2110 |
|
| 2111 |
#if defined(CONFIG_USER_ONLY)
|
| 2112 |
|
| 2113 |
void arm_cpu_do_interrupt(CPUState *cs)
|
| 2114 |
{
|
| 2115 |
ARMCPU *cpu = ARM_CPU(cs); |
| 2116 |
CPUARMState *env = &cpu->env; |
| 2117 |
|
| 2118 |
env->exception_index = -1;
|
| 2119 |
} |
| 2120 |
|
| 2121 |
int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address, int rw, |
| 2122 |
int mmu_idx)
|
| 2123 |
{
|
| 2124 |
if (rw == 2) { |
| 2125 |
env->exception_index = EXCP_PREFETCH_ABORT; |
| 2126 |
env->cp15.c6_insn = address; |
| 2127 |
} else {
|
| 2128 |
env->exception_index = EXCP_DATA_ABORT; |
| 2129 |
env->cp15.c6_data = address; |
| 2130 |
} |
| 2131 |
return 1; |
| 2132 |
} |
| 2133 |
|
| 2134 |
/* These should probably raise undefined insn exceptions. */
|
| 2135 |
void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
|
| 2136 |
{
|
| 2137 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
| 2138 |
} |
| 2139 |
|
| 2140 |
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg) |
| 2141 |
{
|
| 2142 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
| 2143 |
return 0; |
| 2144 |
} |
| 2145 |
|
| 2146 |
void switch_mode(CPUARMState *env, int mode) |
| 2147 |
{
|
| 2148 |
if (mode != ARM_CPU_MODE_USR)
|
| 2149 |
cpu_abort(env, "Tried to switch out of user mode\n");
|
| 2150 |
} |
| 2151 |
|
| 2152 |
void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
|
| 2153 |
{
|
| 2154 |
cpu_abort(env, "banked r13 write\n");
|
| 2155 |
} |
| 2156 |
|
| 2157 |
uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode) |
| 2158 |
{
|
| 2159 |
cpu_abort(env, "banked r13 read\n");
|
| 2160 |
return 0; |
| 2161 |
} |
| 2162 |
|
| 2163 |
#else
|
| 2164 |
|
| 2165 |
/* Map CPU modes onto saved register banks. */
|
| 2166 |
int bank_number(int mode) |
| 2167 |
{
|
| 2168 |
switch (mode) {
|
| 2169 |
case ARM_CPU_MODE_USR:
|
| 2170 |
case ARM_CPU_MODE_SYS:
|
| 2171 |
return 0; |
| 2172 |
case ARM_CPU_MODE_SVC:
|
| 2173 |
return 1; |
| 2174 |
case ARM_CPU_MODE_ABT:
|
| 2175 |
return 2; |
| 2176 |
case ARM_CPU_MODE_UND:
|
| 2177 |
return 3; |
| 2178 |
case ARM_CPU_MODE_IRQ:
|
| 2179 |
return 4; |
| 2180 |
case ARM_CPU_MODE_FIQ:
|
| 2181 |
return 5; |
| 2182 |
} |
| 2183 |
hw_error("bank number requested for bad CPSR mode value 0x%x\n", mode);
|
| 2184 |
} |
| 2185 |
|
| 2186 |
void switch_mode(CPUARMState *env, int mode) |
| 2187 |
{
|
| 2188 |
int old_mode;
|
| 2189 |
int i;
|
| 2190 |
|
| 2191 |
old_mode = env->uncached_cpsr & CPSR_M; |
| 2192 |
if (mode == old_mode)
|
| 2193 |
return;
|
| 2194 |
|
| 2195 |
if (old_mode == ARM_CPU_MODE_FIQ) {
|
| 2196 |
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
| 2197 |
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); |
| 2198 |
} else if (mode == ARM_CPU_MODE_FIQ) { |
| 2199 |
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
| 2200 |
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); |
| 2201 |
} |
| 2202 |
|
| 2203 |
i = bank_number(old_mode); |
| 2204 |
env->banked_r13[i] = env->regs[13];
|
| 2205 |
env->banked_r14[i] = env->regs[14];
|
| 2206 |
env->banked_spsr[i] = env->spsr; |
| 2207 |
|
| 2208 |
i = bank_number(mode); |
| 2209 |
env->regs[13] = env->banked_r13[i];
|
| 2210 |
env->regs[14] = env->banked_r14[i];
|
| 2211 |
env->spsr = env->banked_spsr[i]; |
| 2212 |
} |
| 2213 |
|
| 2214 |
static void v7m_push(CPUARMState *env, uint32_t val) |
| 2215 |
{
|
| 2216 |
env->regs[13] -= 4; |
| 2217 |
stl_phys(env->regs[13], val);
|
| 2218 |
} |
| 2219 |
|
| 2220 |
static uint32_t v7m_pop(CPUARMState *env)
|
| 2221 |
{
|
| 2222 |
uint32_t val; |
| 2223 |
val = ldl_phys(env->regs[13]);
|
| 2224 |
env->regs[13] += 4; |
| 2225 |
return val;
|
| 2226 |
} |
| 2227 |
|
| 2228 |
/* Switch to V7M main or process stack pointer. */
|
| 2229 |
static void switch_v7m_sp(CPUARMState *env, int process) |
| 2230 |
{
|
| 2231 |
uint32_t tmp; |
| 2232 |
if (env->v7m.current_sp != process) {
|
| 2233 |
tmp = env->v7m.other_sp; |
| 2234 |
env->v7m.other_sp = env->regs[13];
|
| 2235 |
env->regs[13] = tmp;
|
| 2236 |
env->v7m.current_sp = process; |
| 2237 |
} |
| 2238 |
} |
| 2239 |
|
| 2240 |
static void do_v7m_exception_exit(CPUARMState *env) |
| 2241 |
{
|
| 2242 |
uint32_t type; |
| 2243 |
uint32_t xpsr; |
| 2244 |
|
| 2245 |
type = env->regs[15];
|
| 2246 |
if (env->v7m.exception != 0) |
| 2247 |
armv7m_nvic_complete_irq(env->nvic, env->v7m.exception); |
| 2248 |
|
| 2249 |
/* Switch to the target stack. */
|
| 2250 |
switch_v7m_sp(env, (type & 4) != 0); |
| 2251 |
/* Pop registers. */
|
| 2252 |
env->regs[0] = v7m_pop(env);
|
| 2253 |
env->regs[1] = v7m_pop(env);
|
| 2254 |
env->regs[2] = v7m_pop(env);
|
| 2255 |
env->regs[3] = v7m_pop(env);
|
| 2256 |
env->regs[12] = v7m_pop(env);
|
| 2257 |
env->regs[14] = v7m_pop(env);
|
| 2258 |
env->regs[15] = v7m_pop(env);
|
| 2259 |
xpsr = v7m_pop(env); |
| 2260 |
xpsr_write(env, xpsr, 0xfffffdff);
|
| 2261 |
/* Undo stack alignment. */
|
| 2262 |
if (xpsr & 0x200) |
| 2263 |
env->regs[13] |= 4; |
| 2264 |
/* ??? The exception return type specifies Thread/Handler mode. However
|
| 2265 |
this is also implied by the xPSR value. Not sure what to do
|
| 2266 |
if there is a mismatch. */
|
| 2267 |
/* ??? Likewise for mismatches between the CONTROL register and the stack
|
| 2268 |
pointer. */
|
| 2269 |
} |
| 2270 |
|
| 2271 |
/* Exception names for debug logging; note that not all of these
|
| 2272 |
* precisely correspond to architectural exceptions.
|
| 2273 |
*/
|
| 2274 |
static const char * const excnames[] = { |
| 2275 |
[EXCP_UDEF] = "Undefined Instruction",
|
| 2276 |
[EXCP_SWI] = "SVC",
|
| 2277 |
[EXCP_PREFETCH_ABORT] = "Prefetch Abort",
|
| 2278 |
[EXCP_DATA_ABORT] = "Data Abort",
|
| 2279 |
[EXCP_IRQ] = "IRQ",
|
| 2280 |
[EXCP_FIQ] = "FIQ",
|
| 2281 |
[EXCP_BKPT] = "Breakpoint",
|
| 2282 |
[EXCP_EXCEPTION_EXIT] = "QEMU v7M exception exit",
|
| 2283 |
[EXCP_KERNEL_TRAP] = "QEMU intercept of kernel commpage",
|
| 2284 |
[EXCP_STREX] = "QEMU intercept of STREX",
|
| 2285 |
}; |
| 2286 |
|
| 2287 |
static inline void arm_log_exception(int idx) |
| 2288 |
{
|
| 2289 |
if (qemu_loglevel_mask(CPU_LOG_INT)) {
|
| 2290 |
const char *exc = NULL; |
| 2291 |
|
| 2292 |
if (idx >= 0 && idx < ARRAY_SIZE(excnames)) { |
| 2293 |
exc = excnames[idx]; |
| 2294 |
} |
| 2295 |
if (!exc) {
|
| 2296 |
exc = "unknown";
|
| 2297 |
} |
| 2298 |
qemu_log_mask(CPU_LOG_INT, "Taking exception %d [%s]\n", idx, exc);
|
| 2299 |
} |
| 2300 |
} |
| 2301 |
|
| 2302 |
void arm_v7m_cpu_do_interrupt(CPUState *cs)
|
| 2303 |
{
|
| 2304 |
ARMCPU *cpu = ARM_CPU(cs); |
| 2305 |
CPUARMState *env = &cpu->env; |
| 2306 |
uint32_t xpsr = xpsr_read(env); |
| 2307 |
uint32_t lr; |
| 2308 |
uint32_t addr; |
| 2309 |
|
| 2310 |
arm_log_exception(env->exception_index); |
| 2311 |
|
| 2312 |
lr = 0xfffffff1;
|
| 2313 |
if (env->v7m.current_sp)
|
| 2314 |
lr |= 4;
|
| 2315 |
if (env->v7m.exception == 0) |
| 2316 |
lr |= 8;
|
| 2317 |
|
| 2318 |
/* For exceptions we just mark as pending on the NVIC, and let that
|
| 2319 |
handle it. */
|
| 2320 |
/* TODO: Need to escalate if the current priority is higher than the
|
| 2321 |
one we're raising. */
|
| 2322 |
switch (env->exception_index) {
|
| 2323 |
case EXCP_UDEF:
|
| 2324 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE); |
| 2325 |
return;
|
| 2326 |
case EXCP_SWI:
|
| 2327 |
/* The PC already points to the next instruction. */
|
| 2328 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC); |
| 2329 |
return;
|
| 2330 |
case EXCP_PREFETCH_ABORT:
|
| 2331 |
case EXCP_DATA_ABORT:
|
| 2332 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM); |
| 2333 |
return;
|
| 2334 |
case EXCP_BKPT:
|
| 2335 |
if (semihosting_enabled) {
|
| 2336 |
int nr;
|
| 2337 |
nr = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff; |
| 2338 |
if (nr == 0xab) { |
| 2339 |
env->regs[15] += 2; |
| 2340 |
env->regs[0] = do_arm_semihosting(env);
|
| 2341 |
qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
|
| 2342 |
return;
|
| 2343 |
} |
| 2344 |
} |
| 2345 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG); |
| 2346 |
return;
|
| 2347 |
case EXCP_IRQ:
|
| 2348 |
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic); |
| 2349 |
break;
|
| 2350 |
case EXCP_EXCEPTION_EXIT:
|
| 2351 |
do_v7m_exception_exit(env); |
| 2352 |
return;
|
| 2353 |
default:
|
| 2354 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
| 2355 |
return; /* Never happens. Keep compiler happy. */ |
| 2356 |
} |
| 2357 |
|
| 2358 |
/* Align stack pointer. */
|
| 2359 |
/* ??? Should only do this if Configuration Control Register
|
| 2360 |
STACKALIGN bit is set. */
|
| 2361 |
if (env->regs[13] & 4) { |
| 2362 |
env->regs[13] -= 4; |
| 2363 |
xpsr |= 0x200;
|
| 2364 |
} |
| 2365 |
/* Switch to the handler mode. */
|
| 2366 |
v7m_push(env, xpsr); |
| 2367 |
v7m_push(env, env->regs[15]);
|
| 2368 |
v7m_push(env, env->regs[14]);
|
| 2369 |
v7m_push(env, env->regs[12]);
|
| 2370 |
v7m_push(env, env->regs[3]);
|
| 2371 |
v7m_push(env, env->regs[2]);
|
| 2372 |
v7m_push(env, env->regs[1]);
|
| 2373 |
v7m_push(env, env->regs[0]);
|
| 2374 |
switch_v7m_sp(env, 0);
|
| 2375 |
/* Clear IT bits */
|
| 2376 |
env->condexec_bits = 0;
|
| 2377 |
env->regs[14] = lr;
|
| 2378 |
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
|
| 2379 |
env->regs[15] = addr & 0xfffffffe; |
| 2380 |
env->thumb = addr & 1;
|
| 2381 |
} |
| 2382 |
|
| 2383 |
/* Handle a CPU exception. */
|
| 2384 |
void arm_cpu_do_interrupt(CPUState *cs)
|
| 2385 |
{
|
| 2386 |
ARMCPU *cpu = ARM_CPU(cs); |
| 2387 |
CPUARMState *env = &cpu->env; |
| 2388 |
uint32_t addr; |
| 2389 |
uint32_t mask; |
| 2390 |
int new_mode;
|
| 2391 |
uint32_t offset; |
| 2392 |
|
| 2393 |
assert(!IS_M(env)); |
| 2394 |
|
| 2395 |
arm_log_exception(env->exception_index); |
| 2396 |
|
| 2397 |
/* TODO: Vectored interrupt controller. */
|
| 2398 |
switch (env->exception_index) {
|
| 2399 |
case EXCP_UDEF:
|
| 2400 |
new_mode = ARM_CPU_MODE_UND; |
| 2401 |
addr = 0x04;
|
| 2402 |
mask = CPSR_I; |
| 2403 |
if (env->thumb)
|
| 2404 |
offset = 2;
|
| 2405 |
else
|
| 2406 |
offset = 4;
|
| 2407 |
break;
|
| 2408 |
case EXCP_SWI:
|
| 2409 |
if (semihosting_enabled) {
|
| 2410 |
/* Check for semihosting interrupt. */
|
| 2411 |
if (env->thumb) {
|
| 2412 |
mask = arm_lduw_code(env, env->regs[15] - 2, env->bswap_code) |
| 2413 |
& 0xff;
|
| 2414 |
} else {
|
| 2415 |
mask = arm_ldl_code(env, env->regs[15] - 4, env->bswap_code) |
| 2416 |
& 0xffffff;
|
| 2417 |
} |
| 2418 |
/* Only intercept calls from privileged modes, to provide some
|
| 2419 |
semblance of security. */
|
| 2420 |
if (((mask == 0x123456 && !env->thumb) |
| 2421 |
|| (mask == 0xab && env->thumb))
|
| 2422 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
|
| 2423 |
env->regs[0] = do_arm_semihosting(env);
|
| 2424 |
qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
|
| 2425 |
return;
|
| 2426 |
} |
| 2427 |
} |
| 2428 |
new_mode = ARM_CPU_MODE_SVC; |
| 2429 |
addr = 0x08;
|
| 2430 |
mask = CPSR_I; |
| 2431 |
/* The PC already points to the next instruction. */
|
| 2432 |
offset = 0;
|
| 2433 |
break;
|
| 2434 |
case EXCP_BKPT:
|
| 2435 |
/* See if this is a semihosting syscall. */
|
| 2436 |
if (env->thumb && semihosting_enabled) {
|
| 2437 |
mask = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff; |
| 2438 |
if (mask == 0xab |
| 2439 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
|
| 2440 |
env->regs[15] += 2; |
| 2441 |
env->regs[0] = do_arm_semihosting(env);
|
| 2442 |
qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
|
| 2443 |
return;
|
| 2444 |
} |
| 2445 |
} |
| 2446 |
env->cp15.c5_insn = 2;
|
| 2447 |
/* Fall through to prefetch abort. */
|
| 2448 |
case EXCP_PREFETCH_ABORT:
|
| 2449 |
qemu_log_mask(CPU_LOG_INT, "...with IFSR 0x%x IFAR 0x%x\n",
|
| 2450 |
env->cp15.c5_insn, env->cp15.c6_insn); |
| 2451 |
new_mode = ARM_CPU_MODE_ABT; |
| 2452 |
addr = 0x0c;
|
| 2453 |
mask = CPSR_A | CPSR_I; |
| 2454 |
offset = 4;
|
| 2455 |
break;
|
| 2456 |
case EXCP_DATA_ABORT:
|
| 2457 |
qemu_log_mask(CPU_LOG_INT, "...with DFSR 0x%x DFAR 0x%x\n",
|
| 2458 |
env->cp15.c5_data, env->cp15.c6_data); |
| 2459 |
new_mode = ARM_CPU_MODE_ABT; |
| 2460 |
addr = 0x10;
|
| 2461 |
mask = CPSR_A | CPSR_I; |
| 2462 |
offset = 8;
|
| 2463 |
break;
|
| 2464 |
case EXCP_IRQ:
|
| 2465 |
new_mode = ARM_CPU_MODE_IRQ; |
| 2466 |
addr = 0x18;
|
| 2467 |
/* Disable IRQ and imprecise data aborts. */
|
| 2468 |
mask = CPSR_A | CPSR_I; |
| 2469 |
offset = 4;
|
| 2470 |
break;
|
| 2471 |
case EXCP_FIQ:
|
| 2472 |
new_mode = ARM_CPU_MODE_FIQ; |
| 2473 |
addr = 0x1c;
|
| 2474 |
/* Disable FIQ, IRQ and imprecise data aborts. */
|
| 2475 |
mask = CPSR_A | CPSR_I | CPSR_F; |
| 2476 |
offset = 4;
|
| 2477 |
break;
|
| 2478 |
default:
|
| 2479 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
| 2480 |
return; /* Never happens. Keep compiler happy. */ |
| 2481 |
} |
| 2482 |
/* High vectors. */
|
| 2483 |
if (env->cp15.c1_sys & (1 << 13)) { |
| 2484 |
/* when enabled, base address cannot be remapped. */
|
| 2485 |
addr += 0xffff0000;
|
| 2486 |
} else {
|
| 2487 |
/* ARM v7 architectures provide a vector base address register to remap
|
| 2488 |
* the interrupt vector table.
|
| 2489 |
* This register is only followed in non-monitor mode, and has a secure
|
| 2490 |
* and un-secure copy. Since the cpu is always in a un-secure operation
|
| 2491 |
* and is never in monitor mode this feature is always active.
|
| 2492 |
* Note: only bits 31:5 are valid.
|
| 2493 |
*/
|
| 2494 |
addr += env->cp15.c12_vbar; |
| 2495 |
} |
| 2496 |
switch_mode (env, new_mode); |
| 2497 |
env->spsr = cpsr_read(env); |
| 2498 |
/* Clear IT bits. */
|
| 2499 |
env->condexec_bits = 0;
|
| 2500 |
/* Switch to the new mode, and to the correct instruction set. */
|
| 2501 |
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode; |
| 2502 |
env->uncached_cpsr |= mask; |
| 2503 |
/* this is a lie, as the was no c1_sys on V4T/V5, but who cares
|
| 2504 |
* and we should just guard the thumb mode on V4 */
|
| 2505 |
if (arm_feature(env, ARM_FEATURE_V4T)) {
|
| 2506 |
env->thumb = (env->cp15.c1_sys & (1 << 30)) != 0; |
| 2507 |
} |
| 2508 |
env->regs[14] = env->regs[15] + offset; |
| 2509 |
env->regs[15] = addr;
|
| 2510 |
cs->interrupt_request |= CPU_INTERRUPT_EXITTB; |
| 2511 |
} |
| 2512 |
|
| 2513 |
/* Check section/page access permissions.
|
| 2514 |
Returns the page protection flags, or zero if the access is not
|
| 2515 |
permitted. */
|
| 2516 |
static inline int check_ap(CPUARMState *env, int ap, int domain_prot, |
| 2517 |
int access_type, int is_user) |
| 2518 |
{
|
| 2519 |
int prot_ro;
|
| 2520 |
|
| 2521 |
if (domain_prot == 3) { |
| 2522 |
return PAGE_READ | PAGE_WRITE;
|
| 2523 |
} |
| 2524 |
|
| 2525 |
if (access_type == 1) |
| 2526 |
prot_ro = 0;
|
| 2527 |
else
|
| 2528 |
prot_ro = PAGE_READ; |
| 2529 |
|
| 2530 |
switch (ap) {
|
| 2531 |
case 0: |
| 2532 |
if (access_type == 1) |
| 2533 |
return 0; |
| 2534 |
switch ((env->cp15.c1_sys >> 8) & 3) { |
| 2535 |
case 1: |
| 2536 |
return is_user ? 0 : PAGE_READ; |
| 2537 |
case 2: |
| 2538 |
return PAGE_READ;
|
| 2539 |
default:
|
| 2540 |
return 0; |
| 2541 |
} |
| 2542 |
case 1: |
| 2543 |
return is_user ? 0 : PAGE_READ | PAGE_WRITE; |
| 2544 |
case 2: |
| 2545 |
if (is_user)
|
| 2546 |
return prot_ro;
|
| 2547 |
else
|
| 2548 |
return PAGE_READ | PAGE_WRITE;
|
| 2549 |
case 3: |
| 2550 |
return PAGE_READ | PAGE_WRITE;
|
| 2551 |
case 4: /* Reserved. */ |
| 2552 |
return 0; |
| 2553 |
case 5: |
| 2554 |
return is_user ? 0 : prot_ro; |
| 2555 |
case 6: |
| 2556 |
return prot_ro;
|
| 2557 |
case 7: |
| 2558 |
if (!arm_feature (env, ARM_FEATURE_V6K))
|
| 2559 |
return 0; |
| 2560 |
return prot_ro;
|
| 2561 |
default:
|
| 2562 |
abort(); |
| 2563 |
} |
| 2564 |
} |
| 2565 |
|
| 2566 |
static uint32_t get_level1_table_address(CPUARMState *env, uint32_t address)
|
| 2567 |
{
|
| 2568 |
uint32_t table; |
| 2569 |
|
| 2570 |
if (address & env->cp15.c2_mask)
|
| 2571 |
table = env->cp15.c2_base1 & 0xffffc000;
|
| 2572 |
else
|
| 2573 |
table = env->cp15.c2_base0 & env->cp15.c2_base_mask; |
| 2574 |
|
| 2575 |
table |= (address >> 18) & 0x3ffc; |
| 2576 |
return table;
|
| 2577 |
} |
| 2578 |
|
| 2579 |
static int get_phys_addr_v5(CPUARMState *env, uint32_t address, int access_type, |
| 2580 |
int is_user, hwaddr *phys_ptr,
|
| 2581 |
int *prot, target_ulong *page_size)
|
| 2582 |
{
|
| 2583 |
int code;
|
| 2584 |
uint32_t table; |
| 2585 |
uint32_t desc; |
| 2586 |
int type;
|
| 2587 |
int ap;
|
| 2588 |
int domain;
|
| 2589 |
int domain_prot;
|
| 2590 |
hwaddr phys_addr; |
| 2591 |
|
| 2592 |
/* Pagetable walk. */
|
| 2593 |
/* Lookup l1 descriptor. */
|
| 2594 |
table = get_level1_table_address(env, address); |
| 2595 |
desc = ldl_phys(table); |
| 2596 |
type = (desc & 3);
|
| 2597 |
domain = (desc >> 5) & 0x0f; |
| 2598 |
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3; |
| 2599 |
if (type == 0) { |
| 2600 |
/* Section translation fault. */
|
| 2601 |
code = 5;
|
| 2602 |
goto do_fault;
|
| 2603 |
} |
| 2604 |
if (domain_prot == 0 || domain_prot == 2) { |
| 2605 |
if (type == 2) |
| 2606 |
code = 9; /* Section domain fault. */ |
| 2607 |
else
|
| 2608 |
code = 11; /* Page domain fault. */ |
| 2609 |
goto do_fault;
|
| 2610 |
} |
| 2611 |
if (type == 2) { |
| 2612 |
/* 1Mb section. */
|
| 2613 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
| 2614 |
ap = (desc >> 10) & 3; |
| 2615 |
code = 13;
|
| 2616 |
*page_size = 1024 * 1024; |
| 2617 |
} else {
|
| 2618 |
/* Lookup l2 entry. */
|
| 2619 |
if (type == 1) { |
| 2620 |
/* Coarse pagetable. */
|
| 2621 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
| 2622 |
} else {
|
| 2623 |
/* Fine pagetable. */
|
| 2624 |
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc); |
| 2625 |
} |
| 2626 |
desc = ldl_phys(table); |
| 2627 |
switch (desc & 3) { |
| 2628 |
case 0: /* Page translation fault. */ |
| 2629 |
code = 7;
|
| 2630 |
goto do_fault;
|
| 2631 |
case 1: /* 64k page. */ |
| 2632 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
| 2633 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
| 2634 |
*page_size = 0x10000;
|
| 2635 |
break;
|
| 2636 |
case 2: /* 4k page. */ |
| 2637 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
| 2638 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
| 2639 |
*page_size = 0x1000;
|
| 2640 |
break;
|
| 2641 |
case 3: /* 1k page. */ |
| 2642 |
if (type == 1) { |
| 2643 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 2644 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
| 2645 |
} else {
|
| 2646 |
/* Page translation fault. */
|
| 2647 |
code = 7;
|
| 2648 |
goto do_fault;
|
| 2649 |
} |
| 2650 |
} else {
|
| 2651 |
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff); |
| 2652 |
} |
| 2653 |
ap = (desc >> 4) & 3; |
| 2654 |
*page_size = 0x400;
|
| 2655 |
break;
|
| 2656 |
default:
|
| 2657 |
/* Never happens, but compiler isn't smart enough to tell. */
|
| 2658 |
abort(); |
| 2659 |
} |
| 2660 |
code = 15;
|
| 2661 |
} |
| 2662 |
*prot = check_ap(env, ap, domain_prot, access_type, is_user); |
| 2663 |
if (!*prot) {
|
| 2664 |
/* Access permission fault. */
|
| 2665 |
goto do_fault;
|
| 2666 |
} |
| 2667 |
*prot |= PAGE_EXEC; |
| 2668 |
*phys_ptr = phys_addr; |
| 2669 |
return 0; |
| 2670 |
do_fault:
|
| 2671 |
return code | (domain << 4); |
| 2672 |
} |
| 2673 |
|
| 2674 |
static int get_phys_addr_v6(CPUARMState *env, uint32_t address, int access_type, |
| 2675 |
int is_user, hwaddr *phys_ptr,
|
| 2676 |
int *prot, target_ulong *page_size)
|
| 2677 |
{
|
| 2678 |
int code;
|
| 2679 |
uint32_t table; |
| 2680 |
uint32_t desc; |
| 2681 |
uint32_t xn; |
| 2682 |
uint32_t pxn = 0;
|
| 2683 |
int type;
|
| 2684 |
int ap;
|
| 2685 |
int domain = 0; |
| 2686 |
int domain_prot;
|
| 2687 |
hwaddr phys_addr; |
| 2688 |
|
| 2689 |
/* Pagetable walk. */
|
| 2690 |
/* Lookup l1 descriptor. */
|
| 2691 |
table = get_level1_table_address(env, address); |
| 2692 |
desc = ldl_phys(table); |
| 2693 |
type = (desc & 3);
|
| 2694 |
if (type == 0 || (type == 3 && !arm_feature(env, ARM_FEATURE_PXN))) { |
| 2695 |
/* Section translation fault, or attempt to use the encoding
|
| 2696 |
* which is Reserved on implementations without PXN.
|
| 2697 |
*/
|
| 2698 |
code = 5;
|
| 2699 |
goto do_fault;
|
| 2700 |
} |
| 2701 |
if ((type == 1) || !(desc & (1 << 18))) { |
| 2702 |
/* Page or Section. */
|
| 2703 |
domain = (desc >> 5) & 0x0f; |
| 2704 |
} |
| 2705 |
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3; |
| 2706 |
if (domain_prot == 0 || domain_prot == 2) { |
| 2707 |
if (type != 1) { |
| 2708 |
code = 9; /* Section domain fault. */ |
| 2709 |
} else {
|
| 2710 |
code = 11; /* Page domain fault. */ |
| 2711 |
} |
| 2712 |
goto do_fault;
|
| 2713 |
} |
| 2714 |
if (type != 1) { |
| 2715 |
if (desc & (1 << 18)) { |
| 2716 |
/* Supersection. */
|
| 2717 |
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff); |
| 2718 |
*page_size = 0x1000000;
|
| 2719 |
} else {
|
| 2720 |
/* Section. */
|
| 2721 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
| 2722 |
*page_size = 0x100000;
|
| 2723 |
} |
| 2724 |
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4); |
| 2725 |
xn = desc & (1 << 4); |
| 2726 |
pxn = desc & 1;
|
| 2727 |
code = 13;
|
| 2728 |
} else {
|
| 2729 |
if (arm_feature(env, ARM_FEATURE_PXN)) {
|
| 2730 |
pxn = (desc >> 2) & 1; |
| 2731 |
} |
| 2732 |
/* Lookup l2 entry. */
|
| 2733 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
| 2734 |
desc = ldl_phys(table); |
| 2735 |
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4); |
| 2736 |
switch (desc & 3) { |
| 2737 |
case 0: /* Page translation fault. */ |
| 2738 |
code = 7;
|
| 2739 |
goto do_fault;
|
| 2740 |
case 1: /* 64k page. */ |
| 2741 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
| 2742 |
xn = desc & (1 << 15); |
| 2743 |
*page_size = 0x10000;
|
| 2744 |
break;
|
| 2745 |
case 2: case 3: /* 4k page. */ |
| 2746 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
| 2747 |
xn = desc & 1;
|
| 2748 |
*page_size = 0x1000;
|
| 2749 |
break;
|
| 2750 |
default:
|
| 2751 |
/* Never happens, but compiler isn't smart enough to tell. */
|
| 2752 |
abort(); |
| 2753 |
} |
| 2754 |
code = 15;
|
| 2755 |
} |
| 2756 |
if (domain_prot == 3) { |
| 2757 |
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
| 2758 |
} else {
|
| 2759 |
if (pxn && !is_user) {
|
| 2760 |
xn = 1;
|
| 2761 |
} |
| 2762 |
if (xn && access_type == 2) |
| 2763 |
goto do_fault;
|
| 2764 |
|
| 2765 |
/* The simplified model uses AP[0] as an access control bit. */
|
| 2766 |
if ((env->cp15.c1_sys & (1 << 29)) && (ap & 1) == 0) { |
| 2767 |
/* Access flag fault. */
|
| 2768 |
code = (code == 15) ? 6 : 3; |
| 2769 |
goto do_fault;
|
| 2770 |
} |
| 2771 |
*prot = check_ap(env, ap, domain_prot, access_type, is_user); |
| 2772 |
if (!*prot) {
|
| 2773 |
/* Access permission fault. */
|
| 2774 |
goto do_fault;
|
| 2775 |
} |
| 2776 |
if (!xn) {
|
| 2777 |
*prot |= PAGE_EXEC; |
| 2778 |
} |
| 2779 |
} |
| 2780 |
*phys_ptr = phys_addr; |
| 2781 |
return 0; |
| 2782 |
do_fault:
|
| 2783 |
return code | (domain << 4); |
| 2784 |
} |
| 2785 |
|
| 2786 |
/* Fault type for long-descriptor MMU fault reporting; this corresponds
|
| 2787 |
* to bits [5..2] in the STATUS field in long-format DFSR/IFSR.
|
| 2788 |
*/
|
| 2789 |
typedef enum { |
| 2790 |
translation_fault = 1,
|
| 2791 |
access_fault = 2,
|
| 2792 |
permission_fault = 3,
|
| 2793 |
} MMUFaultType; |
| 2794 |
|
| 2795 |
static int get_phys_addr_lpae(CPUARMState *env, uint32_t address, |
| 2796 |
int access_type, int is_user, |
| 2797 |
hwaddr *phys_ptr, int *prot,
|
| 2798 |
target_ulong *page_size_ptr) |
| 2799 |
{
|
| 2800 |
/* Read an LPAE long-descriptor translation table. */
|
| 2801 |
MMUFaultType fault_type = translation_fault; |
| 2802 |
uint32_t level = 1;
|
| 2803 |
uint32_t epd; |
| 2804 |
uint32_t tsz; |
| 2805 |
uint64_t ttbr; |
| 2806 |
int ttbr_select;
|
| 2807 |
int n;
|
| 2808 |
hwaddr descaddr; |
| 2809 |
uint32_t tableattrs; |
| 2810 |
target_ulong page_size; |
| 2811 |
uint32_t attrs; |
| 2812 |
|
| 2813 |
/* Determine whether this address is in the region controlled by
|
| 2814 |
* TTBR0 or TTBR1 (or if it is in neither region and should fault).
|
| 2815 |
* This is a Non-secure PL0/1 stage 1 translation, so controlled by
|
| 2816 |
* TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32:
|
| 2817 |
*/
|
| 2818 |
uint32_t t0sz = extract32(env->cp15.c2_control, 0, 3); |
| 2819 |
uint32_t t1sz = extract32(env->cp15.c2_control, 16, 3); |
| 2820 |
if (t0sz && !extract32(address, 32 - t0sz, t0sz)) { |
| 2821 |
/* there is a ttbr0 region and we are in it (high bits all zero) */
|
| 2822 |
ttbr_select = 0;
|
| 2823 |
} else if (t1sz && !extract32(~address, 32 - t1sz, t1sz)) { |
| 2824 |
/* there is a ttbr1 region and we are in it (high bits all one) */
|
| 2825 |
ttbr_select = 1;
|
| 2826 |
} else if (!t0sz) { |
| 2827 |
/* ttbr0 region is "everything not in the ttbr1 region" */
|
| 2828 |
ttbr_select = 0;
|
| 2829 |
} else if (!t1sz) { |
| 2830 |
/* ttbr1 region is "everything not in the ttbr0 region" */
|
| 2831 |
ttbr_select = 1;
|
| 2832 |
} else {
|
| 2833 |
/* in the gap between the two regions, this is a Translation fault */
|
| 2834 |
fault_type = translation_fault; |
| 2835 |
goto do_fault;
|
| 2836 |
} |
| 2837 |
|
| 2838 |
/* Note that QEMU ignores shareability and cacheability attributes,
|
| 2839 |
* so we don't need to do anything with the SH, ORGN, IRGN fields
|
| 2840 |
* in the TTBCR. Similarly, TTBCR:A1 selects whether we get the
|
| 2841 |
* ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently
|
| 2842 |
* implement any ASID-like capability so we can ignore it (instead
|
| 2843 |
* we will always flush the TLB any time the ASID is changed).
|
| 2844 |
*/
|
| 2845 |
if (ttbr_select == 0) { |
| 2846 |
ttbr = ((uint64_t)env->cp15.c2_base0_hi << 32) | env->cp15.c2_base0;
|
| 2847 |
epd = extract32(env->cp15.c2_control, 7, 1); |
| 2848 |
tsz = t0sz; |
| 2849 |
} else {
|
| 2850 |
ttbr = ((uint64_t)env->cp15.c2_base1_hi << 32) | env->cp15.c2_base1;
|
| 2851 |
epd = extract32(env->cp15.c2_control, 23, 1); |
| 2852 |
tsz = t1sz; |
| 2853 |
} |
| 2854 |
|
| 2855 |
if (epd) {
|
| 2856 |
/* Translation table walk disabled => Translation fault on TLB miss */
|
| 2857 |
goto do_fault;
|
| 2858 |
} |
| 2859 |
|
| 2860 |
/* If the region is small enough we will skip straight to a 2nd level
|
| 2861 |
* lookup. This affects the number of bits of the address used in
|
| 2862 |
* combination with the TTBR to find the first descriptor. ('n' here
|
| 2863 |
* matches the usage in the ARM ARM sB3.6.6, where bits [39..n] are
|
| 2864 |
* from the TTBR, [n-1..3] from the vaddr, and [2..0] always zero).
|
| 2865 |
*/
|
| 2866 |
if (tsz > 1) { |
| 2867 |
level = 2;
|
| 2868 |
n = 14 - tsz;
|
| 2869 |
} else {
|
| 2870 |
n = 5 - tsz;
|
| 2871 |
} |
| 2872 |
|
| 2873 |
/* Clear the vaddr bits which aren't part of the within-region address,
|
| 2874 |
* so that we don't have to special case things when calculating the
|
| 2875 |
* first descriptor address.
|
| 2876 |
*/
|
| 2877 |
address &= (0xffffffffU >> tsz);
|
| 2878 |
|
| 2879 |
/* Now we can extract the actual base address from the TTBR */
|
| 2880 |
descaddr = extract64(ttbr, 0, 40); |
| 2881 |
descaddr &= ~((1ULL << n) - 1); |
| 2882 |
|
| 2883 |
tableattrs = 0;
|
| 2884 |
for (;;) {
|
| 2885 |
uint64_t descriptor; |
| 2886 |
|
| 2887 |
descaddr |= ((address >> (9 * (4 - level))) & 0xff8); |
| 2888 |
descriptor = ldq_phys(descaddr); |
| 2889 |
if (!(descriptor & 1) || |
| 2890 |
(!(descriptor & 2) && (level == 3))) { |
| 2891 |
/* Invalid, or the Reserved level 3 encoding */
|
| 2892 |
goto do_fault;
|
| 2893 |
} |
| 2894 |
descaddr = descriptor & 0xfffffff000ULL;
|
| 2895 |
|
| 2896 |
if ((descriptor & 2) && (level < 3)) { |
| 2897 |
/* Table entry. The top five bits are attributes which may
|
| 2898 |
* propagate down through lower levels of the table (and
|
| 2899 |
* which are all arranged so that 0 means "no effect", so
|
| 2900 |
* we can gather them up by ORing in the bits at each level).
|
| 2901 |
*/
|
| 2902 |
tableattrs |= extract64(descriptor, 59, 5); |
| 2903 |
level++; |
| 2904 |
continue;
|
| 2905 |
} |
| 2906 |
/* Block entry at level 1 or 2, or page entry at level 3.
|
| 2907 |
* These are basically the same thing, although the number
|
| 2908 |
* of bits we pull in from the vaddr varies.
|
| 2909 |
*/
|
| 2910 |
page_size = (1 << (39 - (9 * level))); |
| 2911 |
descaddr |= (address & (page_size - 1));
|
| 2912 |
/* Extract attributes from the descriptor and merge with table attrs */
|
| 2913 |
attrs = extract64(descriptor, 2, 10) |
| 2914 |
| (extract64(descriptor, 52, 12) << 10); |
| 2915 |
attrs |= extract32(tableattrs, 0, 2) << 11; /* XN, PXN */ |
| 2916 |
attrs |= extract32(tableattrs, 3, 1) << 5; /* APTable[1] => AP[2] */ |
| 2917 |
/* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1
|
| 2918 |
* means "force PL1 access only", which means forcing AP[1] to 0.
|
| 2919 |
*/
|
| 2920 |
if (extract32(tableattrs, 2, 1)) { |
| 2921 |
attrs &= ~(1 << 4); |
| 2922 |
} |
| 2923 |
/* Since we're always in the Non-secure state, NSTable is ignored. */
|
| 2924 |
break;
|
| 2925 |
} |
| 2926 |
/* Here descaddr is the final physical address, and attributes
|
| 2927 |
* are all in attrs.
|
| 2928 |
*/
|
| 2929 |
fault_type = access_fault; |
| 2930 |
if ((attrs & (1 << 8)) == 0) { |
| 2931 |
/* Access flag */
|
| 2932 |
goto do_fault;
|
| 2933 |
} |
| 2934 |
fault_type = permission_fault; |
| 2935 |
if (is_user && !(attrs & (1 << 4))) { |
| 2936 |
/* Unprivileged access not enabled */
|
| 2937 |
goto do_fault;
|
| 2938 |
} |
| 2939 |
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
| 2940 |
if (attrs & (1 << 12) || (!is_user && (attrs & (1 << 11)))) { |
| 2941 |
/* XN or PXN */
|
| 2942 |
if (access_type == 2) { |
| 2943 |
goto do_fault;
|
| 2944 |
} |
| 2945 |
*prot &= ~PAGE_EXEC; |
| 2946 |
} |
| 2947 |
if (attrs & (1 << 5)) { |
| 2948 |
/* Write access forbidden */
|
| 2949 |
if (access_type == 1) { |
| 2950 |
goto do_fault;
|
| 2951 |
} |
| 2952 |
*prot &= ~PAGE_WRITE; |
| 2953 |
} |
| 2954 |
|
| 2955 |
*phys_ptr = descaddr; |
| 2956 |
*page_size_ptr = page_size; |
| 2957 |
return 0; |
| 2958 |
|
| 2959 |
do_fault:
|
| 2960 |
/* Long-descriptor format IFSR/DFSR value */
|
| 2961 |
return (1 << 9) | (fault_type << 2) | level; |
| 2962 |
} |
| 2963 |
|
| 2964 |
static int get_phys_addr_mpu(CPUARMState *env, uint32_t address, |
| 2965 |
int access_type, int is_user, |
| 2966 |
hwaddr *phys_ptr, int *prot)
|
| 2967 |
{
|
| 2968 |
int n;
|
| 2969 |
uint32_t mask; |
| 2970 |
uint32_t base; |
| 2971 |
|
| 2972 |
*phys_ptr = address; |
| 2973 |
for (n = 7; n >= 0; n--) { |
| 2974 |
base = env->cp15.c6_region[n]; |
| 2975 |
if ((base & 1) == 0) |
| 2976 |
continue;
|
| 2977 |
mask = 1 << ((base >> 1) & 0x1f); |
| 2978 |
/* Keep this shift separate from the above to avoid an
|
| 2979 |
(undefined) << 32. */
|
| 2980 |
mask = (mask << 1) - 1; |
| 2981 |
if (((base ^ address) & ~mask) == 0) |
| 2982 |
break;
|
| 2983 |
} |
| 2984 |
if (n < 0) |
| 2985 |
return 2; |
| 2986 |
|
| 2987 |
if (access_type == 2) { |
| 2988 |
mask = env->cp15.c5_insn; |
| 2989 |
} else {
|
| 2990 |
mask = env->cp15.c5_data; |
| 2991 |
} |
| 2992 |
mask = (mask >> (n * 4)) & 0xf; |
| 2993 |
switch (mask) {
|
| 2994 |
case 0: |
| 2995 |
return 1; |
| 2996 |
case 1: |
| 2997 |
if (is_user)
|
| 2998 |
return 1; |
| 2999 |
*prot = PAGE_READ | PAGE_WRITE; |
| 3000 |
break;
|
| 3001 |
case 2: |
| 3002 |
*prot = PAGE_READ; |
| 3003 |
if (!is_user)
|
| 3004 |
*prot |= PAGE_WRITE; |
| 3005 |
break;
|
| 3006 |
case 3: |
| 3007 |
*prot = PAGE_READ | PAGE_WRITE; |
| 3008 |
break;
|
| 3009 |
case 5: |
| 3010 |
if (is_user)
|
| 3011 |
return 1; |
| 3012 |
*prot = PAGE_READ; |
| 3013 |
break;
|
| 3014 |
case 6: |
| 3015 |
*prot = PAGE_READ; |
| 3016 |
break;
|
| 3017 |
default:
|
| 3018 |
/* Bad permission. */
|
| 3019 |
return 1; |
| 3020 |
} |
| 3021 |
*prot |= PAGE_EXEC; |
| 3022 |
return 0; |
| 3023 |
} |
| 3024 |
|
| 3025 |
/* get_phys_addr - get the physical address for this virtual address
|
| 3026 |
*
|
| 3027 |
* Find the physical address corresponding to the given virtual address,
|
| 3028 |
* by doing a translation table walk on MMU based systems or using the
|
| 3029 |
* MPU state on MPU based systems.
|
| 3030 |
*
|
| 3031 |
* Returns 0 if the translation was successful. Otherwise, phys_ptr,
|
| 3032 |
* prot and page_size are not filled in, and the return value provides
|
| 3033 |
* information on why the translation aborted, in the format of a
|
| 3034 |
* DFSR/IFSR fault register, with the following caveats:
|
| 3035 |
* * we honour the short vs long DFSR format differences.
|
| 3036 |
* * the WnR bit is never set (the caller must do this).
|
| 3037 |
* * for MPU based systems we don't bother to return a full FSR format
|
| 3038 |
* value.
|
| 3039 |
*
|
| 3040 |
* @env: CPUARMState
|
| 3041 |
* @address: virtual address to get physical address for
|
| 3042 |
* @access_type: 0 for read, 1 for write, 2 for execute
|
| 3043 |
* @is_user: 0 for privileged access, 1 for user
|
| 3044 |
* @phys_ptr: set to the physical address corresponding to the virtual address
|
| 3045 |
* @prot: set to the permissions for the page containing phys_ptr
|
| 3046 |
* @page_size: set to the size of the page containing phys_ptr
|
| 3047 |
*/
|
| 3048 |
static inline int get_phys_addr(CPUARMState *env, uint32_t address, |
| 3049 |
int access_type, int is_user, |
| 3050 |
hwaddr *phys_ptr, int *prot,
|
| 3051 |
target_ulong *page_size) |
| 3052 |
{
|
| 3053 |
/* Fast Context Switch Extension. */
|
| 3054 |
if (address < 0x02000000) |
| 3055 |
address += env->cp15.c13_fcse; |
| 3056 |
|
| 3057 |
if ((env->cp15.c1_sys & 1) == 0) { |
| 3058 |
/* MMU/MPU disabled. */
|
| 3059 |
*phys_ptr = address; |
| 3060 |
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
| 3061 |
*page_size = TARGET_PAGE_SIZE; |
| 3062 |
return 0; |
| 3063 |
} else if (arm_feature(env, ARM_FEATURE_MPU)) { |
| 3064 |
*page_size = TARGET_PAGE_SIZE; |
| 3065 |
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
|
| 3066 |
prot); |
| 3067 |
} else if (extended_addresses_enabled(env)) { |
| 3068 |
return get_phys_addr_lpae(env, address, access_type, is_user, phys_ptr,
|
| 3069 |
prot, page_size); |
| 3070 |
} else if (env->cp15.c1_sys & (1 << 23)) { |
| 3071 |
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
|
| 3072 |
prot, page_size); |
| 3073 |
} else {
|
| 3074 |
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
|
| 3075 |
prot, page_size); |
| 3076 |
} |
| 3077 |
} |
| 3078 |
|
| 3079 |
int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address,
|
| 3080 |
int access_type, int mmu_idx) |
| 3081 |
{
|
| 3082 |
hwaddr phys_addr; |
| 3083 |
target_ulong page_size; |
| 3084 |
int prot;
|
| 3085 |
int ret, is_user;
|
| 3086 |
|
| 3087 |
is_user = mmu_idx == MMU_USER_IDX; |
| 3088 |
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot, |
| 3089 |
&page_size); |
| 3090 |
if (ret == 0) { |
| 3091 |
/* Map a single [sub]page. */
|
| 3092 |
phys_addr &= ~(hwaddr)0x3ff;
|
| 3093 |
address &= ~(uint32_t)0x3ff;
|
| 3094 |
tlb_set_page (env, address, phys_addr, prot, mmu_idx, page_size); |
| 3095 |
return 0; |
| 3096 |
} |
| 3097 |
|
| 3098 |
if (access_type == 2) { |
| 3099 |
env->cp15.c5_insn = ret; |
| 3100 |
env->cp15.c6_insn = address; |
| 3101 |
env->exception_index = EXCP_PREFETCH_ABORT; |
| 3102 |
} else {
|
| 3103 |
env->cp15.c5_data = ret; |
| 3104 |
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) |
| 3105 |
env->cp15.c5_data |= (1 << 11); |
| 3106 |
env->cp15.c6_data = address; |
| 3107 |
env->exception_index = EXCP_DATA_ABORT; |
| 3108 |
} |
| 3109 |
return 1; |
| 3110 |
} |
| 3111 |
|
| 3112 |
hwaddr arm_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) |
| 3113 |
{
|
| 3114 |
ARMCPU *cpu = ARM_CPU(cs); |
| 3115 |
hwaddr phys_addr; |
| 3116 |
target_ulong page_size; |
| 3117 |
int prot;
|
| 3118 |
int ret;
|
| 3119 |
|
| 3120 |
ret = get_phys_addr(&cpu->env, addr, 0, 0, &phys_addr, &prot, &page_size); |
| 3121 |
|
| 3122 |
if (ret != 0) { |
| 3123 |
return -1; |
| 3124 |
} |
| 3125 |
|
| 3126 |
return phys_addr;
|
| 3127 |
} |
| 3128 |
|
| 3129 |
void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
|
| 3130 |
{
|
| 3131 |
if ((env->uncached_cpsr & CPSR_M) == mode) {
|
| 3132 |
env->regs[13] = val;
|
| 3133 |
} else {
|
| 3134 |
env->banked_r13[bank_number(mode)] = val; |
| 3135 |
} |
| 3136 |
} |
| 3137 |
|
| 3138 |
uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode) |
| 3139 |
{
|
| 3140 |
if ((env->uncached_cpsr & CPSR_M) == mode) {
|
| 3141 |
return env->regs[13]; |
| 3142 |
} else {
|
| 3143 |
return env->banked_r13[bank_number(mode)];
|
| 3144 |
} |
| 3145 |
} |
| 3146 |
|
| 3147 |
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg) |
| 3148 |
{
|
| 3149 |
switch (reg) {
|
| 3150 |
case 0: /* APSR */ |
| 3151 |
return xpsr_read(env) & 0xf8000000; |
| 3152 |
case 1: /* IAPSR */ |
| 3153 |
return xpsr_read(env) & 0xf80001ff; |
| 3154 |
case 2: /* EAPSR */ |
| 3155 |
return xpsr_read(env) & 0xff00fc00; |
| 3156 |
case 3: /* xPSR */ |
| 3157 |
return xpsr_read(env) & 0xff00fdff; |
| 3158 |
case 5: /* IPSR */ |
| 3159 |
return xpsr_read(env) & 0x000001ff; |
| 3160 |
case 6: /* EPSR */ |
| 3161 |
return xpsr_read(env) & 0x0700fc00; |
| 3162 |
case 7: /* IEPSR */ |
| 3163 |
return xpsr_read(env) & 0x0700edff; |
| 3164 |
case 8: /* MSP */ |
| 3165 |
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13]; |
| 3166 |
case 9: /* PSP */ |
| 3167 |
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp; |
| 3168 |
case 16: /* PRIMASK */ |
| 3169 |
return (env->uncached_cpsr & CPSR_I) != 0; |
| 3170 |
case 17: /* BASEPRI */ |
| 3171 |
case 18: /* BASEPRI_MAX */ |
| 3172 |
return env->v7m.basepri;
|
| 3173 |
case 19: /* FAULTMASK */ |
| 3174 |
return (env->uncached_cpsr & CPSR_F) != 0; |
| 3175 |
case 20: /* CONTROL */ |
| 3176 |
return env->v7m.control;
|
| 3177 |
default:
|
| 3178 |
/* ??? For debugging only. */
|
| 3179 |
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
|
| 3180 |
return 0; |
| 3181 |
} |
| 3182 |
} |
| 3183 |
|
| 3184 |
void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
|
| 3185 |
{
|
| 3186 |
switch (reg) {
|
| 3187 |
case 0: /* APSR */ |
| 3188 |
xpsr_write(env, val, 0xf8000000);
|
| 3189 |
break;
|
| 3190 |
case 1: /* IAPSR */ |
| 3191 |
xpsr_write(env, val, 0xf8000000);
|
| 3192 |
break;
|
| 3193 |
case 2: /* EAPSR */ |
| 3194 |
xpsr_write(env, val, 0xfe00fc00);
|
| 3195 |
break;
|
| 3196 |
case 3: /* xPSR */ |
| 3197 |
xpsr_write(env, val, 0xfe00fc00);
|
| 3198 |
break;
|
| 3199 |
case 5: /* IPSR */ |
| 3200 |
/* IPSR bits are readonly. */
|
| 3201 |
break;
|
| 3202 |
case 6: /* EPSR */ |
| 3203 |
xpsr_write(env, val, 0x0600fc00);
|
| 3204 |
break;
|
| 3205 |
case 7: /* IEPSR */ |
| 3206 |
xpsr_write(env, val, 0x0600fc00);
|
| 3207 |
break;
|
| 3208 |
case 8: /* MSP */ |
| 3209 |
if (env->v7m.current_sp)
|
| 3210 |
env->v7m.other_sp = val; |
| 3211 |
else
|
| 3212 |
env->regs[13] = val;
|
| 3213 |
break;
|
| 3214 |
case 9: /* PSP */ |
| 3215 |
if (env->v7m.current_sp)
|
| 3216 |
env->regs[13] = val;
|
| 3217 |
else
|
| 3218 |
env->v7m.other_sp = val; |
| 3219 |
break;
|
| 3220 |
case 16: /* PRIMASK */ |
| 3221 |
if (val & 1) |
| 3222 |
env->uncached_cpsr |= CPSR_I; |
| 3223 |
else
|
| 3224 |
env->uncached_cpsr &= ~CPSR_I; |
| 3225 |
break;
|
| 3226 |
case 17: /* BASEPRI */ |
| 3227 |
env->v7m.basepri = val & 0xff;
|
| 3228 |
break;
|
| 3229 |
case 18: /* BASEPRI_MAX */ |
| 3230 |
val &= 0xff;
|
| 3231 |
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0)) |
| 3232 |
env->v7m.basepri = val; |
| 3233 |
break;
|
| 3234 |
case 19: /* FAULTMASK */ |
| 3235 |
if (val & 1) |
| 3236 |
env->uncached_cpsr |= CPSR_F; |
| 3237 |
else
|
| 3238 |
env->uncached_cpsr &= ~CPSR_F; |
| 3239 |
break;
|
| 3240 |
case 20: /* CONTROL */ |
| 3241 |
env->v7m.control = val & 3;
|
| 3242 |
switch_v7m_sp(env, (val & 2) != 0); |
| 3243 |
break;
|
| 3244 |
default:
|
| 3245 |
/* ??? For debugging only. */
|
| 3246 |
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
|
| 3247 |
return;
|
| 3248 |
} |
| 3249 |
} |
| 3250 |
|
| 3251 |
#endif
|
| 3252 |
|
| 3253 |
/* Note that signed overflow is undefined in C. The following routines are
|
| 3254 |
careful to use unsigned types where modulo arithmetic is required.
|
| 3255 |
Failure to do so _will_ break on newer gcc. */
|
| 3256 |
|
| 3257 |
/* Signed saturating arithmetic. */
|
| 3258 |
|
| 3259 |
/* Perform 16-bit signed saturating addition. */
|
| 3260 |
static inline uint16_t add16_sat(uint16_t a, uint16_t b) |
| 3261 |
{
|
| 3262 |
uint16_t res; |
| 3263 |
|
| 3264 |
res = a + b; |
| 3265 |
if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) { |
| 3266 |
if (a & 0x8000) |
| 3267 |
res = 0x8000;
|
| 3268 |
else
|
| 3269 |
res = 0x7fff;
|
| 3270 |
} |
| 3271 |
return res;
|
| 3272 |
} |
| 3273 |
|
| 3274 |
/* Perform 8-bit signed saturating addition. */
|
| 3275 |
static inline uint8_t add8_sat(uint8_t a, uint8_t b) |
| 3276 |
{
|
| 3277 |
uint8_t res; |
| 3278 |
|
| 3279 |
res = a + b; |
| 3280 |
if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) { |
| 3281 |
if (a & 0x80) |
| 3282 |
res = 0x80;
|
| 3283 |
else
|
| 3284 |
res = 0x7f;
|
| 3285 |
} |
| 3286 |
return res;
|
| 3287 |
} |
| 3288 |
|
| 3289 |
/* Perform 16-bit signed saturating subtraction. */
|
| 3290 |
static inline uint16_t sub16_sat(uint16_t a, uint16_t b) |
| 3291 |
{
|
| 3292 |
uint16_t res; |
| 3293 |
|
| 3294 |
res = a - b; |
| 3295 |
if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) { |
| 3296 |
if (a & 0x8000) |
| 3297 |
res = 0x8000;
|
| 3298 |
else
|
| 3299 |
res = 0x7fff;
|
| 3300 |
} |
| 3301 |
return res;
|
| 3302 |
} |
| 3303 |
|
| 3304 |
/* Perform 8-bit signed saturating subtraction. */
|
| 3305 |
static inline uint8_t sub8_sat(uint8_t a, uint8_t b) |
| 3306 |
{
|
| 3307 |
uint8_t res; |
| 3308 |
|
| 3309 |
res = a - b; |
| 3310 |
if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) { |
| 3311 |
if (a & 0x80) |
| 3312 |
res = 0x80;
|
| 3313 |
else
|
| 3314 |
res = 0x7f;
|
| 3315 |
} |
| 3316 |
return res;
|
| 3317 |
} |
| 3318 |
|
| 3319 |
#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16); |
| 3320 |
#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16); |
| 3321 |
#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8); |
| 3322 |
#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8); |
| 3323 |
#define PFX q
|
| 3324 |
|
| 3325 |
#include "op_addsub.h" |
| 3326 |
|
| 3327 |
/* Unsigned saturating arithmetic. */
|
| 3328 |
static inline uint16_t add16_usat(uint16_t a, uint16_t b) |
| 3329 |
{
|
| 3330 |
uint16_t res; |
| 3331 |
res = a + b; |
| 3332 |
if (res < a)
|
| 3333 |
res = 0xffff;
|
| 3334 |
return res;
|
| 3335 |
} |
| 3336 |
|
| 3337 |
static inline uint16_t sub16_usat(uint16_t a, uint16_t b) |
| 3338 |
{
|
| 3339 |
if (a > b)
|
| 3340 |
return a - b;
|
| 3341 |
else
|
| 3342 |
return 0; |
| 3343 |
} |
| 3344 |
|
| 3345 |
static inline uint8_t add8_usat(uint8_t a, uint8_t b) |
| 3346 |
{
|
| 3347 |
uint8_t res; |
| 3348 |
res = a + b; |
| 3349 |
if (res < a)
|
| 3350 |
res = 0xff;
|
| 3351 |
return res;
|
| 3352 |
} |
| 3353 |
|
| 3354 |
static inline uint8_t sub8_usat(uint8_t a, uint8_t b) |
| 3355 |
{
|
| 3356 |
if (a > b)
|
| 3357 |
return a - b;
|
| 3358 |
else
|
| 3359 |
return 0; |
| 3360 |
} |
| 3361 |
|
| 3362 |
#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16); |
| 3363 |
#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16); |
| 3364 |
#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8); |
| 3365 |
#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8); |
| 3366 |
#define PFX uq
|
| 3367 |
|
| 3368 |
#include "op_addsub.h" |
| 3369 |
|
| 3370 |
/* Signed modulo arithmetic. */
|
| 3371 |
#define SARITH16(a, b, n, op) do { \ |
| 3372 |
int32_t sum; \ |
| 3373 |
sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \ |
| 3374 |
RESULT(sum, n, 16); \
|
| 3375 |
if (sum >= 0) \ |
| 3376 |
ge |= 3 << (n * 2); \ |
| 3377 |
} while(0) |
| 3378 |
|
| 3379 |
#define SARITH8(a, b, n, op) do { \ |
| 3380 |
int32_t sum; \ |
| 3381 |
sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \ |
| 3382 |
RESULT(sum, n, 8); \
|
| 3383 |
if (sum >= 0) \ |
| 3384 |
ge |= 1 << n; \
|
| 3385 |
} while(0) |
| 3386 |
|
| 3387 |
|
| 3388 |
#define ADD16(a, b, n) SARITH16(a, b, n, +)
|
| 3389 |
#define SUB16(a, b, n) SARITH16(a, b, n, -)
|
| 3390 |
#define ADD8(a, b, n) SARITH8(a, b, n, +)
|
| 3391 |
#define SUB8(a, b, n) SARITH8(a, b, n, -)
|
| 3392 |
#define PFX s
|
| 3393 |
#define ARITH_GE
|
| 3394 |
|
| 3395 |
#include "op_addsub.h" |
| 3396 |
|
| 3397 |
/* Unsigned modulo arithmetic. */
|
| 3398 |
#define ADD16(a, b, n) do { \ |
| 3399 |
uint32_t sum; \ |
| 3400 |
sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \ |
| 3401 |
RESULT(sum, n, 16); \
|
| 3402 |
if ((sum >> 16) == 1) \ |
| 3403 |
ge |= 3 << (n * 2); \ |
| 3404 |
} while(0) |
| 3405 |
|
| 3406 |
#define ADD8(a, b, n) do { \ |
| 3407 |
uint32_t sum; \ |
| 3408 |
sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \ |
| 3409 |
RESULT(sum, n, 8); \
|
| 3410 |
if ((sum >> 8) == 1) \ |
| 3411 |
ge |= 1 << n; \
|
| 3412 |
} while(0) |
| 3413 |
|
| 3414 |
#define SUB16(a, b, n) do { \ |
| 3415 |
uint32_t sum; \ |
| 3416 |
sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \ |
| 3417 |
RESULT(sum, n, 16); \
|
| 3418 |
if ((sum >> 16) == 0) \ |
| 3419 |
ge |= 3 << (n * 2); \ |
| 3420 |
} while(0) |
| 3421 |
|
| 3422 |
#define SUB8(a, b, n) do { \ |
| 3423 |
uint32_t sum; \ |
| 3424 |
sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \ |
| 3425 |
RESULT(sum, n, 8); \
|
| 3426 |
if ((sum >> 8) == 0) \ |
| 3427 |
ge |= 1 << n; \
|
| 3428 |
} while(0) |
| 3429 |
|
| 3430 |
#define PFX u
|
| 3431 |
#define ARITH_GE
|
| 3432 |
|
| 3433 |
#include "op_addsub.h" |
| 3434 |
|
| 3435 |
/* Halved signed arithmetic. */
|
| 3436 |
#define ADD16(a, b, n) \
|
| 3437 |
RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16) |
| 3438 |
#define SUB16(a, b, n) \
|
| 3439 |
RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16) |
| 3440 |
#define ADD8(a, b, n) \
|
| 3441 |
RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8) |
| 3442 |
#define SUB8(a, b, n) \
|
| 3443 |
RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8) |
| 3444 |
#define PFX sh
|
| 3445 |
|
| 3446 |
#include "op_addsub.h" |
| 3447 |
|
| 3448 |
/* Halved unsigned arithmetic. */
|
| 3449 |
#define ADD16(a, b, n) \
|
| 3450 |
RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
| 3451 |
#define SUB16(a, b, n) \
|
| 3452 |
RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
| 3453 |
#define ADD8(a, b, n) \
|
| 3454 |
RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
| 3455 |
#define SUB8(a, b, n) \
|
| 3456 |
RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
| 3457 |
#define PFX uh
|
| 3458 |
|
| 3459 |
#include "op_addsub.h" |
| 3460 |
|
| 3461 |
static inline uint8_t do_usad(uint8_t a, uint8_t b) |
| 3462 |
{
|
| 3463 |
if (a > b)
|
| 3464 |
return a - b;
|
| 3465 |
else
|
| 3466 |
return b - a;
|
| 3467 |
} |
| 3468 |
|
| 3469 |
/* Unsigned sum of absolute byte differences. */
|
| 3470 |
uint32_t HELPER(usad8)(uint32_t a, uint32_t b) |
| 3471 |
{
|
| 3472 |
uint32_t sum; |
| 3473 |
sum = do_usad(a, b); |
| 3474 |
sum += do_usad(a >> 8, b >> 8); |
| 3475 |
sum += do_usad(a >> 16, b >>16); |
| 3476 |
sum += do_usad(a >> 24, b >> 24); |
| 3477 |
return sum;
|
| 3478 |
} |
| 3479 |
|
| 3480 |
/* For ARMv6 SEL instruction. */
|
| 3481 |
uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b) |
| 3482 |
{
|
| 3483 |
uint32_t mask; |
| 3484 |
|
| 3485 |
mask = 0;
|
| 3486 |
if (flags & 1) |
| 3487 |
mask |= 0xff;
|
| 3488 |
if (flags & 2) |
| 3489 |
mask |= 0xff00;
|
| 3490 |
if (flags & 4) |
| 3491 |
mask |= 0xff0000;
|
| 3492 |
if (flags & 8) |
| 3493 |
mask |= 0xff000000;
|
| 3494 |
return (a & mask) | (b & ~mask);
|
| 3495 |
} |
| 3496 |
|
| 3497 |
/* VFP support. We follow the convention used for VFP instructions:
|
| 3498 |
Single precision routines have a "s" suffix, double precision a
|
| 3499 |
"d" suffix. */
|
| 3500 |
|
| 3501 |
/* Convert host exception flags to vfp form. */
|
| 3502 |
static inline int vfp_exceptbits_from_host(int host_bits) |
| 3503 |
{
|
| 3504 |
int target_bits = 0; |
| 3505 |
|
| 3506 |
if (host_bits & float_flag_invalid)
|
| 3507 |
target_bits |= 1;
|
| 3508 |
if (host_bits & float_flag_divbyzero)
|
| 3509 |
target_bits |= 2;
|
| 3510 |
if (host_bits & float_flag_overflow)
|
| 3511 |
target_bits |= 4;
|
| 3512 |
if (host_bits & (float_flag_underflow | float_flag_output_denormal))
|
| 3513 |
target_bits |= 8;
|
| 3514 |
if (host_bits & float_flag_inexact)
|
| 3515 |
target_bits |= 0x10;
|
| 3516 |
if (host_bits & float_flag_input_denormal)
|
| 3517 |
target_bits |= 0x80;
|
| 3518 |
return target_bits;
|
| 3519 |
} |
| 3520 |
|
| 3521 |
uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env) |
| 3522 |
{
|
| 3523 |
int i;
|
| 3524 |
uint32_t fpscr; |
| 3525 |
|
| 3526 |
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
|
| 3527 |
| (env->vfp.vec_len << 16)
|
| 3528 |
| (env->vfp.vec_stride << 20);
|
| 3529 |
i = get_float_exception_flags(&env->vfp.fp_status); |
| 3530 |
i |= get_float_exception_flags(&env->vfp.standard_fp_status); |
| 3531 |
fpscr |= vfp_exceptbits_from_host(i); |
| 3532 |
return fpscr;
|
| 3533 |
} |
| 3534 |
|
| 3535 |
uint32_t vfp_get_fpscr(CPUARMState *env) |
| 3536 |
{
|
| 3537 |
return HELPER(vfp_get_fpscr)(env);
|
| 3538 |
} |
| 3539 |
|
| 3540 |
/* Convert vfp exception flags to target form. */
|
| 3541 |
static inline int vfp_exceptbits_to_host(int target_bits) |
| 3542 |
{
|
| 3543 |
int host_bits = 0; |
| 3544 |
|
| 3545 |
if (target_bits & 1) |
| 3546 |
host_bits |= float_flag_invalid; |
| 3547 |
if (target_bits & 2) |
| 3548 |
host_bits |= float_flag_divbyzero; |
| 3549 |
if (target_bits & 4) |
| 3550 |
host_bits |= float_flag_overflow; |
| 3551 |
if (target_bits & 8) |
| 3552 |
host_bits |= float_flag_underflow; |
| 3553 |
if (target_bits & 0x10) |
| 3554 |
host_bits |= float_flag_inexact; |
| 3555 |
if (target_bits & 0x80) |
| 3556 |
host_bits |= float_flag_input_denormal; |
| 3557 |
return host_bits;
|
| 3558 |
} |
| 3559 |
|
| 3560 |
void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
|
| 3561 |
{
|
| 3562 |
int i;
|
| 3563 |
uint32_t changed; |
| 3564 |
|
| 3565 |
changed = env->vfp.xregs[ARM_VFP_FPSCR]; |
| 3566 |
env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
|
| 3567 |
env->vfp.vec_len = (val >> 16) & 7; |
| 3568 |
env->vfp.vec_stride = (val >> 20) & 3; |
| 3569 |
|
| 3570 |
changed ^= val; |
| 3571 |
if (changed & (3 << 22)) { |
| 3572 |
i = (val >> 22) & 3; |
| 3573 |
switch (i) {
|
| 3574 |
case 0: |
| 3575 |
i = float_round_nearest_even; |
| 3576 |
break;
|
| 3577 |
case 1: |
| 3578 |
i = float_round_up; |
| 3579 |
break;
|
| 3580 |
case 2: |
| 3581 |
i = float_round_down; |
| 3582 |
break;
|
| 3583 |
case 3: |
| 3584 |
i = float_round_to_zero; |
| 3585 |
break;
|
| 3586 |
} |
| 3587 |
set_float_rounding_mode(i, &env->vfp.fp_status); |
| 3588 |
} |
| 3589 |
if (changed & (1 << 24)) { |
| 3590 |
set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); |
| 3591 |
set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); |
| 3592 |
} |
| 3593 |
if (changed & (1 << 25)) |
| 3594 |
set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status); |
| 3595 |
|
| 3596 |
i = vfp_exceptbits_to_host(val); |
| 3597 |
set_float_exception_flags(i, &env->vfp.fp_status); |
| 3598 |
set_float_exception_flags(0, &env->vfp.standard_fp_status);
|
| 3599 |
} |
| 3600 |
|
| 3601 |
void vfp_set_fpscr(CPUARMState *env, uint32_t val)
|
| 3602 |
{
|
| 3603 |
HELPER(vfp_set_fpscr)(env, val); |
| 3604 |
} |
| 3605 |
|
| 3606 |
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
|
| 3607 |
|
| 3608 |
#define VFP_BINOP(name) \
|
| 3609 |
float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \
|
| 3610 |
{ \
|
| 3611 |
float_status *fpst = fpstp; \ |
| 3612 |
return float32_ ## name(a, b, fpst); \ |
| 3613 |
} \ |
| 3614 |
float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \
|
| 3615 |
{ \
|
| 3616 |
float_status *fpst = fpstp; \ |
| 3617 |
return float64_ ## name(a, b, fpst); \ |
| 3618 |
} |
| 3619 |
VFP_BINOP(add) |
| 3620 |
VFP_BINOP(sub) |
| 3621 |
VFP_BINOP(mul) |
| 3622 |
VFP_BINOP(div) |
| 3623 |
#undef VFP_BINOP
|
| 3624 |
|
| 3625 |
float32 VFP_HELPER(neg, s)(float32 a) |
| 3626 |
{
|
| 3627 |
return float32_chs(a);
|
| 3628 |
} |
| 3629 |
|
| 3630 |
float64 VFP_HELPER(neg, d)(float64 a) |
| 3631 |
{
|
| 3632 |
return float64_chs(a);
|
| 3633 |
} |
| 3634 |
|
| 3635 |
float32 VFP_HELPER(abs, s)(float32 a) |
| 3636 |
{
|
| 3637 |
return float32_abs(a);
|
| 3638 |
} |
| 3639 |
|
| 3640 |
float64 VFP_HELPER(abs, d)(float64 a) |
| 3641 |
{
|
| 3642 |
return float64_abs(a);
|
| 3643 |
} |
| 3644 |
|
| 3645 |
float32 VFP_HELPER(sqrt, s)(float32 a, CPUARMState *env) |
| 3646 |
{
|
| 3647 |
return float32_sqrt(a, &env->vfp.fp_status);
|
| 3648 |
} |
| 3649 |
|
| 3650 |
float64 VFP_HELPER(sqrt, d)(float64 a, CPUARMState *env) |
| 3651 |
{
|
| 3652 |
return float64_sqrt(a, &env->vfp.fp_status);
|
| 3653 |
} |
| 3654 |
|
| 3655 |
/* XXX: check quiet/signaling case */
|
| 3656 |
#define DO_VFP_cmp(p, type) \
|
| 3657 |
void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env) \
|
| 3658 |
{ \
|
| 3659 |
uint32_t flags; \ |
| 3660 |
switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \ |
| 3661 |
case 0: flags = 0x6; break; \ |
| 3662 |
case -1: flags = 0x8; break; \ |
| 3663 |
case 1: flags = 0x2; break; \ |
| 3664 |
default: case 2: flags = 0x3; break; \ |
| 3665 |
} \ |
| 3666 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
| 3667 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
| 3668 |
} \ |
| 3669 |
void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \
|
| 3670 |
{ \
|
| 3671 |
uint32_t flags; \ |
| 3672 |
switch(type ## _compare(a, b, &env->vfp.fp_status)) { \ |
| 3673 |
case 0: flags = 0x6; break; \ |
| 3674 |
case -1: flags = 0x8; break; \ |
| 3675 |
case 1: flags = 0x2; break; \ |
| 3676 |
default: case 2: flags = 0x3; break; \ |
| 3677 |
} \ |
| 3678 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
| 3679 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
| 3680 |
} |
| 3681 |
DO_VFP_cmp(s, float32) |
| 3682 |
DO_VFP_cmp(d, float64) |
| 3683 |
#undef DO_VFP_cmp
|
| 3684 |
|
| 3685 |
/* Integer to float and float to integer conversions */
|
| 3686 |
|
| 3687 |
#define CONV_ITOF(name, fsz, sign) \
|
| 3688 |
float##fsz HELPER(name)(uint32_t x, void *fpstp) \ |
| 3689 |
{ \
|
| 3690 |
float_status *fpst = fpstp; \ |
| 3691 |
return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \ |
| 3692 |
} |
| 3693 |
|
| 3694 |
#define CONV_FTOI(name, fsz, sign, round) \
|
| 3695 |
uint32_t HELPER(name)(float##fsz x, void *fpstp) \ |
| 3696 |
{ \
|
| 3697 |
float_status *fpst = fpstp; \ |
| 3698 |
if (float##fsz##_is_any_nan(x)) { \ |
| 3699 |
float_raise(float_flag_invalid, fpst); \ |
| 3700 |
return 0; \ |
| 3701 |
} \ |
| 3702 |
return float##fsz##_to_##sign##int32##round(x, fpst); \ |
| 3703 |
} |
| 3704 |
|
| 3705 |
#define FLOAT_CONVS(name, p, fsz, sign) \
|
| 3706 |
CONV_ITOF(vfp_##name##to##p, fsz, sign) \ |
| 3707 |
CONV_FTOI(vfp_to##name##p, fsz, sign, ) \ |
| 3708 |
CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero) |
| 3709 |
|
| 3710 |
FLOAT_CONVS(si, s, 32, )
|
| 3711 |
FLOAT_CONVS(si, d, 64, )
|
| 3712 |
FLOAT_CONVS(ui, s, 32, u)
|
| 3713 |
FLOAT_CONVS(ui, d, 64, u)
|
| 3714 |
|
| 3715 |
#undef CONV_ITOF
|
| 3716 |
#undef CONV_FTOI
|
| 3717 |
#undef FLOAT_CONVS
|
| 3718 |
|
| 3719 |
/* floating point conversion */
|
| 3720 |
float64 VFP_HELPER(fcvtd, s)(float32 x, CPUARMState *env) |
| 3721 |
{
|
| 3722 |
float64 r = float32_to_float64(x, &env->vfp.fp_status); |
| 3723 |
/* ARM requires that S<->D conversion of any kind of NaN generates
|
| 3724 |
* a quiet NaN by forcing the most significant frac bit to 1.
|
| 3725 |
*/
|
| 3726 |
return float64_maybe_silence_nan(r);
|
| 3727 |
} |
| 3728 |
|
| 3729 |
float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env) |
| 3730 |
{
|
| 3731 |
float32 r = float64_to_float32(x, &env->vfp.fp_status); |
| 3732 |
/* ARM requires that S<->D conversion of any kind of NaN generates
|
| 3733 |
* a quiet NaN by forcing the most significant frac bit to 1.
|
| 3734 |
*/
|
| 3735 |
return float32_maybe_silence_nan(r);
|
| 3736 |
} |
| 3737 |
|
| 3738 |
/* VFP3 fixed point conversion. */
|
| 3739 |
#define VFP_CONV_FIX(name, p, fsz, itype, sign) \
|
| 3740 |
float##fsz HELPER(vfp_##name##to##p)(uint##fsz##_t x, uint32_t shift, \ |
| 3741 |
void *fpstp) \
|
| 3742 |
{ \
|
| 3743 |
float_status *fpst = fpstp; \ |
| 3744 |
float##fsz tmp; \ |
| 3745 |
tmp = sign##int32_to_##float##fsz((itype##_t)x, fpst); \ |
| 3746 |
return float##fsz##_scalbn(tmp, -(int)shift, fpst); \ |
| 3747 |
} \ |
| 3748 |
uint##fsz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \ |
| 3749 |
void *fpstp) \
|
| 3750 |
{ \
|
| 3751 |
float_status *fpst = fpstp; \ |
| 3752 |
float##fsz tmp; \ |
| 3753 |
if (float##fsz##_is_any_nan(x)) { \ |
| 3754 |
float_raise(float_flag_invalid, fpst); \ |
| 3755 |
return 0; \ |
| 3756 |
} \ |
| 3757 |
tmp = float##fsz##_scalbn(x, shift, fpst); \ |
| 3758 |
return float##fsz##_to_##itype##_round_to_zero(tmp, fpst); \ |
| 3759 |
} |
| 3760 |
|
| 3761 |
VFP_CONV_FIX(sh, d, 64, int16, )
|
| 3762 |
VFP_CONV_FIX(sl, d, 64, int32, )
|
| 3763 |
VFP_CONV_FIX(uh, d, 64, uint16, u)
|
| 3764 |
VFP_CONV_FIX(ul, d, 64, uint32, u)
|
| 3765 |
VFP_CONV_FIX(sh, s, 32, int16, )
|
| 3766 |
VFP_CONV_FIX(sl, s, 32, int32, )
|
| 3767 |
VFP_CONV_FIX(uh, s, 32, uint16, u)
|
| 3768 |
VFP_CONV_FIX(ul, s, 32, uint32, u)
|
| 3769 |
#undef VFP_CONV_FIX
|
| 3770 |
|
| 3771 |
/* Half precision conversions. */
|
| 3772 |
static float32 do_fcvt_f16_to_f32(uint32_t a, CPUARMState *env, float_status *s)
|
| 3773 |
{
|
| 3774 |
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; |
| 3775 |
float32 r = float16_to_float32(make_float16(a), ieee, s); |
| 3776 |
if (ieee) {
|
| 3777 |
return float32_maybe_silence_nan(r);
|
| 3778 |
} |
| 3779 |
return r;
|
| 3780 |
} |
| 3781 |
|
| 3782 |
static uint32_t do_fcvt_f32_to_f16(float32 a, CPUARMState *env, float_status *s)
|
| 3783 |
{
|
| 3784 |
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; |
| 3785 |
float16 r = float32_to_float16(a, ieee, s); |
| 3786 |
if (ieee) {
|
| 3787 |
r = float16_maybe_silence_nan(r); |
| 3788 |
} |
| 3789 |
return float16_val(r);
|
| 3790 |
} |
| 3791 |
|
| 3792 |
float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env) |
| 3793 |
{
|
| 3794 |
return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status);
|
| 3795 |
} |
| 3796 |
|
| 3797 |
uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUARMState *env) |
| 3798 |
{
|
| 3799 |
return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status);
|
| 3800 |
} |
| 3801 |
|
| 3802 |
float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env) |
| 3803 |
{
|
| 3804 |
return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status);
|
| 3805 |
} |
| 3806 |
|
| 3807 |
uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUARMState *env) |
| 3808 |
{
|
| 3809 |
return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status);
|
| 3810 |
} |
| 3811 |
|
| 3812 |
#define float32_two make_float32(0x40000000) |
| 3813 |
#define float32_three make_float32(0x40400000) |
| 3814 |
#define float32_one_point_five make_float32(0x3fc00000) |
| 3815 |
|
| 3816 |
float32 HELPER(recps_f32)(float32 a, float32 b, CPUARMState *env) |
| 3817 |
{
|
| 3818 |
float_status *s = &env->vfp.standard_fp_status; |
| 3819 |
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
|
| 3820 |
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
|
| 3821 |
if (!(float32_is_zero(a) || float32_is_zero(b))) {
|
| 3822 |
float_raise(float_flag_input_denormal, s); |
| 3823 |
} |
| 3824 |
return float32_two;
|
| 3825 |
} |
| 3826 |
return float32_sub(float32_two, float32_mul(a, b, s), s);
|
| 3827 |
} |
| 3828 |
|
| 3829 |
float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUARMState *env) |
| 3830 |
{
|
| 3831 |
float_status *s = &env->vfp.standard_fp_status; |
| 3832 |
float32 product; |
| 3833 |
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
|
| 3834 |
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
|
| 3835 |
if (!(float32_is_zero(a) || float32_is_zero(b))) {
|
| 3836 |
float_raise(float_flag_input_denormal, s); |
| 3837 |
} |
| 3838 |
return float32_one_point_five;
|
| 3839 |
} |
| 3840 |
product = float32_mul(a, b, s); |
| 3841 |
return float32_div(float32_sub(float32_three, product, s), float32_two, s);
|
| 3842 |
} |
| 3843 |
|
| 3844 |
/* NEON helpers. */
|
| 3845 |
|
| 3846 |
/* Constants 256 and 512 are used in some helpers; we avoid relying on
|
| 3847 |
* int->float conversions at run-time. */
|
| 3848 |
#define float64_256 make_float64(0x4070000000000000LL) |
| 3849 |
#define float64_512 make_float64(0x4080000000000000LL) |
| 3850 |
|
| 3851 |
/* The algorithm that must be used to calculate the estimate
|
| 3852 |
* is specified by the ARM ARM.
|
| 3853 |
*/
|
| 3854 |
static float64 recip_estimate(float64 a, CPUARMState *env)
|
| 3855 |
{
|
| 3856 |
/* These calculations mustn't set any fp exception flags,
|
| 3857 |
* so we use a local copy of the fp_status.
|
| 3858 |
*/
|
| 3859 |
float_status dummy_status = env->vfp.standard_fp_status; |
| 3860 |
float_status *s = &dummy_status; |
| 3861 |
/* q = (int)(a * 512.0) */
|
| 3862 |
float64 q = float64_mul(float64_512, a, s); |
| 3863 |
int64_t q_int = float64_to_int64_round_to_zero(q, s); |
| 3864 |
|
| 3865 |
/* r = 1.0 / (((double)q + 0.5) / 512.0) */
|
| 3866 |
q = int64_to_float64(q_int, s); |
| 3867 |
q = float64_add(q, float64_half, s); |
| 3868 |
q = float64_div(q, float64_512, s); |
| 3869 |
q = float64_div(float64_one, q, s); |
| 3870 |
|
| 3871 |
/* s = (int)(256.0 * r + 0.5) */
|
| 3872 |
q = float64_mul(q, float64_256, s); |
| 3873 |
q = float64_add(q, float64_half, s); |
| 3874 |
q_int = float64_to_int64_round_to_zero(q, s); |
| 3875 |
|
| 3876 |
/* return (double)s / 256.0 */
|
| 3877 |
return float64_div(int64_to_float64(q_int, s), float64_256, s);
|
| 3878 |
} |
| 3879 |
|
| 3880 |
float32 HELPER(recpe_f32)(float32 a, CPUARMState *env) |
| 3881 |
{
|
| 3882 |
float_status *s = &env->vfp.standard_fp_status; |
| 3883 |
float64 f64; |
| 3884 |
uint32_t val32 = float32_val(a); |
| 3885 |
|
| 3886 |
int result_exp;
|
| 3887 |
int a_exp = (val32 & 0x7f800000) >> 23; |
| 3888 |
int sign = val32 & 0x80000000; |
| 3889 |
|
| 3890 |
if (float32_is_any_nan(a)) {
|
| 3891 |
if (float32_is_signaling_nan(a)) {
|
| 3892 |
float_raise(float_flag_invalid, s); |
| 3893 |
} |
| 3894 |
return float32_default_nan;
|
| 3895 |
} else if (float32_is_infinity(a)) { |
| 3896 |
return float32_set_sign(float32_zero, float32_is_neg(a));
|
| 3897 |
} else if (float32_is_zero_or_denormal(a)) { |
| 3898 |
if (!float32_is_zero(a)) {
|
| 3899 |
float_raise(float_flag_input_denormal, s); |
| 3900 |
} |
| 3901 |
float_raise(float_flag_divbyzero, s); |
| 3902 |
return float32_set_sign(float32_infinity, float32_is_neg(a));
|
| 3903 |
} else if (a_exp >= 253) { |
| 3904 |
float_raise(float_flag_underflow, s); |
| 3905 |
return float32_set_sign(float32_zero, float32_is_neg(a));
|
| 3906 |
} |
| 3907 |
|
| 3908 |
f64 = make_float64((0x3feULL << 52) |
| 3909 |
| ((int64_t)(val32 & 0x7fffff) << 29)); |
| 3910 |
|
| 3911 |
result_exp = 253 - a_exp;
|
| 3912 |
|
| 3913 |
f64 = recip_estimate(f64, env); |
| 3914 |
|
| 3915 |
val32 = sign |
| 3916 |
| ((result_exp & 0xff) << 23) |
| 3917 |
| ((float64_val(f64) >> 29) & 0x7fffff); |
| 3918 |
return make_float32(val32);
|
| 3919 |
} |
| 3920 |
|
| 3921 |
/* The algorithm that must be used to calculate the estimate
|
| 3922 |
* is specified by the ARM ARM.
|
| 3923 |
*/
|
| 3924 |
static float64 recip_sqrt_estimate(float64 a, CPUARMState *env)
|
| 3925 |
{
|
| 3926 |
/* These calculations mustn't set any fp exception flags,
|
| 3927 |
* so we use a local copy of the fp_status.
|
| 3928 |
*/
|
| 3929 |
float_status dummy_status = env->vfp.standard_fp_status; |
| 3930 |
float_status *s = &dummy_status; |
| 3931 |
float64 q; |
| 3932 |
int64_t q_int; |
| 3933 |
|
| 3934 |
if (float64_lt(a, float64_half, s)) {
|
| 3935 |
/* range 0.25 <= a < 0.5 */
|
| 3936 |
|
| 3937 |
/* a in units of 1/512 rounded down */
|
| 3938 |
/* q0 = (int)(a * 512.0); */
|
| 3939 |
q = float64_mul(float64_512, a, s); |
| 3940 |
q_int = float64_to_int64_round_to_zero(q, s); |
| 3941 |
|
| 3942 |
/* reciprocal root r */
|
| 3943 |
/* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */
|
| 3944 |
q = int64_to_float64(q_int, s); |
| 3945 |
q = float64_add(q, float64_half, s); |
| 3946 |
q = float64_div(q, float64_512, s); |
| 3947 |
q = float64_sqrt(q, s); |
| 3948 |
q = float64_div(float64_one, q, s); |
| 3949 |
} else {
|
| 3950 |
/* range 0.5 <= a < 1.0 */
|
| 3951 |
|
| 3952 |
/* a in units of 1/256 rounded down */
|
| 3953 |
/* q1 = (int)(a * 256.0); */
|
| 3954 |
q = float64_mul(float64_256, a, s); |
| 3955 |
int64_t q_int = float64_to_int64_round_to_zero(q, s); |
| 3956 |
|
| 3957 |
/* reciprocal root r */
|
| 3958 |
/* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
|
| 3959 |
q = int64_to_float64(q_int, s); |
| 3960 |
q = float64_add(q, float64_half, s); |
| 3961 |
q = float64_div(q, float64_256, s); |
| 3962 |
q = float64_sqrt(q, s); |
| 3963 |
q = float64_div(float64_one, q, s); |
| 3964 |
} |
| 3965 |
/* r in units of 1/256 rounded to nearest */
|
| 3966 |
/* s = (int)(256.0 * r + 0.5); */
|
| 3967 |
|
| 3968 |
q = float64_mul(q, float64_256,s ); |
| 3969 |
q = float64_add(q, float64_half, s); |
| 3970 |
q_int = float64_to_int64_round_to_zero(q, s); |
| 3971 |
|
| 3972 |
/* return (double)s / 256.0;*/
|
| 3973 |
return float64_div(int64_to_float64(q_int, s), float64_256, s);
|
| 3974 |
} |
| 3975 |
|
| 3976 |
float32 HELPER(rsqrte_f32)(float32 a, CPUARMState *env) |
| 3977 |
{
|
| 3978 |
float_status *s = &env->vfp.standard_fp_status; |
| 3979 |
int result_exp;
|
| 3980 |
float64 f64; |
| 3981 |
uint32_t val; |
| 3982 |
uint64_t val64; |
| 3983 |
|
| 3984 |
val = float32_val(a); |
| 3985 |
|
| 3986 |
if (float32_is_any_nan(a)) {
|
| 3987 |
if (float32_is_signaling_nan(a)) {
|
| 3988 |
float_raise(float_flag_invalid, s); |
| 3989 |
} |
| 3990 |
return float32_default_nan;
|
| 3991 |
} else if (float32_is_zero_or_denormal(a)) { |
| 3992 |
if (!float32_is_zero(a)) {
|
| 3993 |
float_raise(float_flag_input_denormal, s); |
| 3994 |
} |
| 3995 |
float_raise(float_flag_divbyzero, s); |
| 3996 |
return float32_set_sign(float32_infinity, float32_is_neg(a));
|
| 3997 |
} else if (float32_is_neg(a)) { |
| 3998 |
float_raise(float_flag_invalid, s); |
| 3999 |
return float32_default_nan;
|
| 4000 |
} else if (float32_is_infinity(a)) { |
| 4001 |
return float32_zero;
|
| 4002 |
} |
| 4003 |
|
| 4004 |
/* Normalize to a double-precision value between 0.25 and 1.0,
|
| 4005 |
* preserving the parity of the exponent. */
|
| 4006 |
if ((val & 0x800000) == 0) { |
| 4007 |
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32) |
| 4008 |
| (0x3feULL << 52) |
| 4009 |
| ((uint64_t)(val & 0x7fffff) << 29)); |
| 4010 |
} else {
|
| 4011 |
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32) |
| 4012 |
| (0x3fdULL << 52) |
| 4013 |
| ((uint64_t)(val & 0x7fffff) << 29)); |
| 4014 |
} |
| 4015 |
|
| 4016 |
result_exp = (380 - ((val & 0x7f800000) >> 23)) / 2; |
| 4017 |
|
| 4018 |
f64 = recip_sqrt_estimate(f64, env); |
| 4019 |
|
| 4020 |
val64 = float64_val(f64); |
| 4021 |
|
| 4022 |
val = ((result_exp & 0xff) << 23) |
| 4023 |
| ((val64 >> 29) & 0x7fffff); |
| 4024 |
return make_float32(val);
|
| 4025 |
} |
| 4026 |
|
| 4027 |
uint32_t HELPER(recpe_u32)(uint32_t a, CPUARMState *env) |
| 4028 |
{
|
| 4029 |
float64 f64; |
| 4030 |
|
| 4031 |
if ((a & 0x80000000) == 0) { |
| 4032 |
return 0xffffffff; |
| 4033 |
} |
| 4034 |
|
| 4035 |
f64 = make_float64((0x3feULL << 52) |
| 4036 |
| ((int64_t)(a & 0x7fffffff) << 21)); |
| 4037 |
|
| 4038 |
f64 = recip_estimate (f64, env); |
| 4039 |
|
| 4040 |
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); |
| 4041 |
} |
| 4042 |
|
| 4043 |
uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUARMState *env) |
| 4044 |
{
|
| 4045 |
float64 f64; |
| 4046 |
|
| 4047 |
if ((a & 0xc0000000) == 0) { |
| 4048 |
return 0xffffffff; |
| 4049 |
} |
| 4050 |
|
| 4051 |
if (a & 0x80000000) { |
| 4052 |
f64 = make_float64((0x3feULL << 52) |
| 4053 |
| ((uint64_t)(a & 0x7fffffff) << 21)); |
| 4054 |
} else { /* bits 31-30 == '01' */ |
| 4055 |
f64 = make_float64((0x3fdULL << 52) |
| 4056 |
| ((uint64_t)(a & 0x3fffffff) << 22)); |
| 4057 |
} |
| 4058 |
|
| 4059 |
f64 = recip_sqrt_estimate(f64, env); |
| 4060 |
|
| 4061 |
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); |
| 4062 |
} |
| 4063 |
|
| 4064 |
/* VFPv4 fused multiply-accumulate */
|
| 4065 |
float32 VFP_HELPER(muladd, s)(float32 a, float32 b, float32 c, void *fpstp)
|
| 4066 |
{
|
| 4067 |
float_status *fpst = fpstp; |
| 4068 |
return float32_muladd(a, b, c, 0, fpst); |
| 4069 |
} |
| 4070 |
|
| 4071 |
float64 VFP_HELPER(muladd, d)(float64 a, float64 b, float64 c, void *fpstp)
|
| 4072 |
{
|
| 4073 |
float_status *fpst = fpstp; |
| 4074 |
return float64_muladd(a, b, c, 0, fpst); |
| 4075 |
} |