root / target-arm / helper.c @ e9aa6c21
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| 1 |
#include "cpu.h" |
|---|---|
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#include "gdbstub.h" |
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#include "helper.h" |
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#include "host-utils.h" |
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#include "sysemu.h" |
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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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|
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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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} |
| 51 |
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 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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REGINFO_SENTINEL |
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}; |
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|
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static const ARMCPRegInfo v7_cp_reginfo[] = { |
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/* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
|
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* debug components
|
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*/
|
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{ .name = "DBGDRAR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
|
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.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
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{ .name = "DBGDRAR", .cp = 14, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
|
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.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
|
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REGINFO_SENTINEL |
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}; |
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|
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void register_cp_regs_for_features(ARMCPU *cpu)
|
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{
|
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/* Register all the coprocessor registers based on feature bits */
|
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CPUARMState *env = &cpu->env; |
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if (arm_feature(env, ARM_FEATURE_M)) {
|
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/* M profile has no coprocessor registers */
|
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return;
|
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} |
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|
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define_arm_cp_regs(cpu, cp_reginfo); |
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if (arm_feature(env, ARM_FEATURE_V7)) {
|
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define_arm_cp_regs(cpu, v7_cp_reginfo); |
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} |
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} |
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|
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ARMCPU *cpu_arm_init(const char *cpu_model) |
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{
|
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ARMCPU *cpu; |
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CPUARMState *env; |
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static int inited = 0; |
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|
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if (!object_class_by_name(cpu_model)) {
|
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return NULL; |
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} |
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cpu = ARM_CPU(object_new(cpu_model)); |
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env = &cpu->env; |
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env->cpu_model_str = cpu_model; |
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arm_cpu_realize(cpu); |
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|
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if (tcg_enabled() && !inited) {
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inited = 1;
|
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arm_translate_init(); |
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} |
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|
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cpu_reset(CPU(cpu)); |
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if (arm_feature(env, ARM_FEATURE_NEON)) {
|
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gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg, |
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51, "arm-neon.xml", 0); |
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} else if (arm_feature(env, ARM_FEATURE_VFP3)) { |
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gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg, |
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35, "arm-vfp3.xml", 0); |
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} else if (arm_feature(env, ARM_FEATURE_VFP)) { |
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gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg, |
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19, "arm-vfp.xml", 0); |
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} |
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qemu_init_vcpu(env); |
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return cpu;
|
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} |
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|
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typedef struct ARMCPUListState { |
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fprintf_function cpu_fprintf; |
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FILE *file; |
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} ARMCPUListState; |
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|
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/* Sort alphabetically by type name, except for "any". */
|
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static gint arm_cpu_list_compare(gconstpointer a, gconstpointer b)
|
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{
|
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ObjectClass *class_a = (ObjectClass *)a; |
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ObjectClass *class_b = (ObjectClass *)b; |
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const char *name_a, *name_b; |
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|
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name_a = object_class_get_name(class_a); |
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name_b = object_class_get_name(class_b); |
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if (strcmp(name_a, "any") == 0) { |
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return 1; |
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} else if (strcmp(name_b, "any") == 0) { |
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return -1; |
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} else {
|
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return strcmp(name_a, name_b);
|
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} |
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} |
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|
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static void arm_cpu_list_entry(gpointer data, gpointer user_data) |
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{
|
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ObjectClass *oc = data; |
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ARMCPUListState *s = user_data; |
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|
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(*s->cpu_fprintf)(s->file, " %s\n",
|
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object_class_get_name(oc)); |
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} |
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|
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void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
|
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{
|
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ARMCPUListState s = {
|
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.file = f, |
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.cpu_fprintf = cpu_fprintf, |
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}; |
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GSList *list; |
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|
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list = object_class_get_list(TYPE_ARM_CPU, false);
|
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list = g_slist_sort(list, arm_cpu_list_compare); |
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(*cpu_fprintf)(f, "Available CPUs:\n");
|
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g_slist_foreach(list, arm_cpu_list_entry, &s); |
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g_slist_free(list); |
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} |
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|
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void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
|
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const ARMCPRegInfo *r, void *opaque) |
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{
|
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/* Define implementations of coprocessor registers.
|
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* We store these in a hashtable because typically
|
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* there are less than 150 registers in a space which
|
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* is 16*16*16*8*8 = 262144 in size.
|
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* Wildcarding is supported for the crm, opc1 and opc2 fields.
|
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* If a register is defined twice then the second definition is
|
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* used, so this can be used to define some generic registers and
|
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* then override them with implementation specific variations.
|
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* At least one of the original and the second definition should
|
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* include ARM_CP_OVERRIDE in its type bits -- this is just a guard
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* against accidental use.
|
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*/
|
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int crm, opc1, opc2;
|
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int crmmin = (r->crm == CP_ANY) ? 0 : r->crm; |
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int crmmax = (r->crm == CP_ANY) ? 15 : r->crm; |
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int opc1min = (r->opc1 == CP_ANY) ? 0 : r->opc1; |
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int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1; |
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int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2; |
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int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2; |
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/* 64 bit registers have only CRm and Opc1 fields */
|
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assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn))); |
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/* Check that the register definition has enough info to handle
|
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* reads and writes if they are permitted.
|
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*/
|
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if (!(r->type & (ARM_CP_SPECIAL|ARM_CP_CONST))) {
|
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if (r->access & PL3_R) {
|
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assert(r->fieldoffset || r->readfn); |
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} |
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if (r->access & PL3_W) {
|
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assert(r->fieldoffset || r->writefn); |
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} |
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} |
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/* Bad type field probably means missing sentinel at end of reg list */
|
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assert(cptype_valid(r->type)); |
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for (crm = crmmin; crm <= crmmax; crm++) {
|
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for (opc1 = opc1min; opc1 <= opc1max; opc1++) {
|
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for (opc2 = opc2min; opc2 <= opc2max; opc2++) {
|
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uint32_t *key = g_new(uint32_t, 1);
|
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ARMCPRegInfo *r2 = g_memdup(r, sizeof(ARMCPRegInfo));
|
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int is64 = (r->type & ARM_CP_64BIT) ? 1 : 0; |
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*key = ENCODE_CP_REG(r->cp, is64, r->crn, crm, opc1, opc2); |
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r2->opaque = opaque; |
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/* Make sure reginfo passed to helpers for wildcarded regs
|
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* has the correct crm/opc1/opc2 for this reg, not CP_ANY:
|
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*/
|
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r2->crm = crm; |
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r2->opc1 = opc1; |
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r2->opc2 = opc2; |
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/* Overriding of an existing definition must be explicitly
|
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* requested.
|
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*/
|
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if (!(r->type & ARM_CP_OVERRIDE)) {
|
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ARMCPRegInfo *oldreg; |
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oldreg = g_hash_table_lookup(cpu->cp_regs, key); |
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if (oldreg && !(oldreg->type & ARM_CP_OVERRIDE)) {
|
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fprintf(stderr, "Register redefined: cp=%d %d bit "
|
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"crn=%d crm=%d opc1=%d opc2=%d, "
|
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"was %s, now %s\n", r2->cp, 32 + 32 * is64, |
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r2->crn, r2->crm, r2->opc1, r2->opc2, |
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oldreg->name, r2->name); |
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assert(0);
|
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} |
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} |
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g_hash_table_insert(cpu->cp_regs, key, r2); |
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} |
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} |
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} |
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} |
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|
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void define_arm_cp_regs_with_opaque(ARMCPU *cpu,
|
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const ARMCPRegInfo *regs, void *opaque) |
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{
|
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/* Define a whole list of registers */
|
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const ARMCPRegInfo *r;
|
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for (r = regs; r->type != ARM_CP_SENTINEL; r++) {
|
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define_one_arm_cp_reg_with_opaque(cpu, r, opaque); |
| 255 |
} |
| 256 |
} |
| 257 |
|
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const ARMCPRegInfo *get_arm_cp_reginfo(ARMCPU *cpu, uint32_t encoded_cp)
|
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{
|
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return g_hash_table_lookup(cpu->cp_regs, &encoded_cp);
|
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} |
| 262 |
|
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int arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri, |
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uint64_t value) |
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{
|
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/* Helper coprocessor write function for write-ignore registers */
|
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return 0; |
| 268 |
} |
| 269 |
|
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int arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t *value) |
| 271 |
{
|
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/* Helper coprocessor write function for read-as-zero registers */
|
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*value = 0;
|
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return 0; |
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} |
| 276 |
|
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static int bad_mode_switch(CPUARMState *env, int mode) |
| 278 |
{
|
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/* Return true if it is not valid for us to switch to
|
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* this CPU mode (ie all the UNPREDICTABLE cases in
|
| 281 |
* the ARM ARM CPSRWriteByInstr pseudocode).
|
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*/
|
| 283 |
switch (mode) {
|
| 284 |
case ARM_CPU_MODE_USR:
|
| 285 |
case ARM_CPU_MODE_SYS:
|
| 286 |
case ARM_CPU_MODE_SVC:
|
| 287 |
case ARM_CPU_MODE_ABT:
|
| 288 |
case ARM_CPU_MODE_UND:
|
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case ARM_CPU_MODE_IRQ:
|
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case ARM_CPU_MODE_FIQ:
|
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return 0; |
| 292 |
default:
|
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return 1; |
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} |
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} |
| 296 |
|
| 297 |
uint32_t cpsr_read(CPUARMState *env) |
| 298 |
{
|
| 299 |
int ZF;
|
| 300 |
ZF = (env->ZF == 0);
|
| 301 |
return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) | |
| 302 |
(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27) |
| 303 |
| (env->thumb << 5) | ((env->condexec_bits & 3) << 25) |
| 304 |
| ((env->condexec_bits & 0xfc) << 8) |
| 305 |
| (env->GE << 16);
|
| 306 |
} |
| 307 |
|
| 308 |
void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
|
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{
|
| 310 |
if (mask & CPSR_NZCV) {
|
| 311 |
env->ZF = (~val) & CPSR_Z; |
| 312 |
env->NF = val; |
| 313 |
env->CF = (val >> 29) & 1; |
| 314 |
env->VF = (val << 3) & 0x80000000; |
| 315 |
} |
| 316 |
if (mask & CPSR_Q)
|
| 317 |
env->QF = ((val & CPSR_Q) != 0);
|
| 318 |
if (mask & CPSR_T)
|
| 319 |
env->thumb = ((val & CPSR_T) != 0);
|
| 320 |
if (mask & CPSR_IT_0_1) {
|
| 321 |
env->condexec_bits &= ~3;
|
| 322 |
env->condexec_bits |= (val >> 25) & 3; |
| 323 |
} |
| 324 |
if (mask & CPSR_IT_2_7) {
|
| 325 |
env->condexec_bits &= 3;
|
| 326 |
env->condexec_bits |= (val >> 8) & 0xfc; |
| 327 |
} |
| 328 |
if (mask & CPSR_GE) {
|
| 329 |
env->GE = (val >> 16) & 0xf; |
| 330 |
} |
| 331 |
|
| 332 |
if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
|
| 333 |
if (bad_mode_switch(env, val & CPSR_M)) {
|
| 334 |
/* Attempt to switch to an invalid mode: this is UNPREDICTABLE.
|
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* We choose to ignore the attempt and leave the CPSR M field
|
| 336 |
* untouched.
|
| 337 |
*/
|
| 338 |
mask &= ~CPSR_M; |
| 339 |
} else {
|
| 340 |
switch_mode(env, val & CPSR_M); |
| 341 |
} |
| 342 |
} |
| 343 |
mask &= ~CACHED_CPSR_BITS; |
| 344 |
env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask); |
| 345 |
} |
| 346 |
|
| 347 |
/* Sign/zero extend */
|
| 348 |
uint32_t HELPER(sxtb16)(uint32_t x) |
| 349 |
{
|
| 350 |
uint32_t res; |
| 351 |
res = (uint16_t)(int8_t)x; |
| 352 |
res |= (uint32_t)(int8_t)(x >> 16) << 16; |
| 353 |
return res;
|
| 354 |
} |
| 355 |
|
| 356 |
uint32_t HELPER(uxtb16)(uint32_t x) |
| 357 |
{
|
| 358 |
uint32_t res; |
| 359 |
res = (uint16_t)(uint8_t)x; |
| 360 |
res |= (uint32_t)(uint8_t)(x >> 16) << 16; |
| 361 |
return res;
|
| 362 |
} |
| 363 |
|
| 364 |
uint32_t HELPER(clz)(uint32_t x) |
| 365 |
{
|
| 366 |
return clz32(x);
|
| 367 |
} |
| 368 |
|
| 369 |
int32_t HELPER(sdiv)(int32_t num, int32_t den) |
| 370 |
{
|
| 371 |
if (den == 0) |
| 372 |
return 0; |
| 373 |
if (num == INT_MIN && den == -1) |
| 374 |
return INT_MIN;
|
| 375 |
return num / den;
|
| 376 |
} |
| 377 |
|
| 378 |
uint32_t HELPER(udiv)(uint32_t num, uint32_t den) |
| 379 |
{
|
| 380 |
if (den == 0) |
| 381 |
return 0; |
| 382 |
return num / den;
|
| 383 |
} |
| 384 |
|
| 385 |
uint32_t HELPER(rbit)(uint32_t x) |
| 386 |
{
|
| 387 |
x = ((x & 0xff000000) >> 24) |
| 388 |
| ((x & 0x00ff0000) >> 8) |
| 389 |
| ((x & 0x0000ff00) << 8) |
| 390 |
| ((x & 0x000000ff) << 24); |
| 391 |
x = ((x & 0xf0f0f0f0) >> 4) |
| 392 |
| ((x & 0x0f0f0f0f) << 4); |
| 393 |
x = ((x & 0x88888888) >> 3) |
| 394 |
| ((x & 0x44444444) >> 1) |
| 395 |
| ((x & 0x22222222) << 1) |
| 396 |
| ((x & 0x11111111) << 3); |
| 397 |
return x;
|
| 398 |
} |
| 399 |
|
| 400 |
uint32_t HELPER(abs)(uint32_t x) |
| 401 |
{
|
| 402 |
return ((int32_t)x < 0) ? -x : x; |
| 403 |
} |
| 404 |
|
| 405 |
#if defined(CONFIG_USER_ONLY)
|
| 406 |
|
| 407 |
void do_interrupt (CPUARMState *env)
|
| 408 |
{
|
| 409 |
env->exception_index = -1;
|
| 410 |
} |
| 411 |
|
| 412 |
int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address, int rw, |
| 413 |
int mmu_idx)
|
| 414 |
{
|
| 415 |
if (rw == 2) { |
| 416 |
env->exception_index = EXCP_PREFETCH_ABORT; |
| 417 |
env->cp15.c6_insn = address; |
| 418 |
} else {
|
| 419 |
env->exception_index = EXCP_DATA_ABORT; |
| 420 |
env->cp15.c6_data = address; |
| 421 |
} |
| 422 |
return 1; |
| 423 |
} |
| 424 |
|
| 425 |
void HELPER(set_cp15)(CPUARMState *env, uint32_t insn, uint32_t val)
|
| 426 |
{
|
| 427 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
| 428 |
} |
| 429 |
|
| 430 |
uint32_t HELPER(get_cp15)(CPUARMState *env, uint32_t insn) |
| 431 |
{
|
| 432 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
| 433 |
} |
| 434 |
|
| 435 |
/* These should probably raise undefined insn exceptions. */
|
| 436 |
void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
|
| 437 |
{
|
| 438 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
| 439 |
} |
| 440 |
|
| 441 |
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg) |
| 442 |
{
|
| 443 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
| 444 |
return 0; |
| 445 |
} |
| 446 |
|
| 447 |
void switch_mode(CPUARMState *env, int mode) |
| 448 |
{
|
| 449 |
if (mode != ARM_CPU_MODE_USR)
|
| 450 |
cpu_abort(env, "Tried to switch out of user mode\n");
|
| 451 |
} |
| 452 |
|
| 453 |
void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
|
| 454 |
{
|
| 455 |
cpu_abort(env, "banked r13 write\n");
|
| 456 |
} |
| 457 |
|
| 458 |
uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode) |
| 459 |
{
|
| 460 |
cpu_abort(env, "banked r13 read\n");
|
| 461 |
return 0; |
| 462 |
} |
| 463 |
|
| 464 |
#else
|
| 465 |
|
| 466 |
/* Map CPU modes onto saved register banks. */
|
| 467 |
static inline int bank_number(CPUARMState *env, int mode) |
| 468 |
{
|
| 469 |
switch (mode) {
|
| 470 |
case ARM_CPU_MODE_USR:
|
| 471 |
case ARM_CPU_MODE_SYS:
|
| 472 |
return 0; |
| 473 |
case ARM_CPU_MODE_SVC:
|
| 474 |
return 1; |
| 475 |
case ARM_CPU_MODE_ABT:
|
| 476 |
return 2; |
| 477 |
case ARM_CPU_MODE_UND:
|
| 478 |
return 3; |
| 479 |
case ARM_CPU_MODE_IRQ:
|
| 480 |
return 4; |
| 481 |
case ARM_CPU_MODE_FIQ:
|
| 482 |
return 5; |
| 483 |
} |
| 484 |
cpu_abort(env, "Bad mode %x\n", mode);
|
| 485 |
return -1; |
| 486 |
} |
| 487 |
|
| 488 |
void switch_mode(CPUARMState *env, int mode) |
| 489 |
{
|
| 490 |
int old_mode;
|
| 491 |
int i;
|
| 492 |
|
| 493 |
old_mode = env->uncached_cpsr & CPSR_M; |
| 494 |
if (mode == old_mode)
|
| 495 |
return;
|
| 496 |
|
| 497 |
if (old_mode == ARM_CPU_MODE_FIQ) {
|
| 498 |
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
| 499 |
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); |
| 500 |
} else if (mode == ARM_CPU_MODE_FIQ) { |
| 501 |
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
| 502 |
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); |
| 503 |
} |
| 504 |
|
| 505 |
i = bank_number(env, old_mode); |
| 506 |
env->banked_r13[i] = env->regs[13];
|
| 507 |
env->banked_r14[i] = env->regs[14];
|
| 508 |
env->banked_spsr[i] = env->spsr; |
| 509 |
|
| 510 |
i = bank_number(env, mode); |
| 511 |
env->regs[13] = env->banked_r13[i];
|
| 512 |
env->regs[14] = env->banked_r14[i];
|
| 513 |
env->spsr = env->banked_spsr[i]; |
| 514 |
} |
| 515 |
|
| 516 |
static void v7m_push(CPUARMState *env, uint32_t val) |
| 517 |
{
|
| 518 |
env->regs[13] -= 4; |
| 519 |
stl_phys(env->regs[13], val);
|
| 520 |
} |
| 521 |
|
| 522 |
static uint32_t v7m_pop(CPUARMState *env)
|
| 523 |
{
|
| 524 |
uint32_t val; |
| 525 |
val = ldl_phys(env->regs[13]);
|
| 526 |
env->regs[13] += 4; |
| 527 |
return val;
|
| 528 |
} |
| 529 |
|
| 530 |
/* Switch to V7M main or process stack pointer. */
|
| 531 |
static void switch_v7m_sp(CPUARMState *env, int process) |
| 532 |
{
|
| 533 |
uint32_t tmp; |
| 534 |
if (env->v7m.current_sp != process) {
|
| 535 |
tmp = env->v7m.other_sp; |
| 536 |
env->v7m.other_sp = env->regs[13];
|
| 537 |
env->regs[13] = tmp;
|
| 538 |
env->v7m.current_sp = process; |
| 539 |
} |
| 540 |
} |
| 541 |
|
| 542 |
static void do_v7m_exception_exit(CPUARMState *env) |
| 543 |
{
|
| 544 |
uint32_t type; |
| 545 |
uint32_t xpsr; |
| 546 |
|
| 547 |
type = env->regs[15];
|
| 548 |
if (env->v7m.exception != 0) |
| 549 |
armv7m_nvic_complete_irq(env->nvic, env->v7m.exception); |
| 550 |
|
| 551 |
/* Switch to the target stack. */
|
| 552 |
switch_v7m_sp(env, (type & 4) != 0); |
| 553 |
/* Pop registers. */
|
| 554 |
env->regs[0] = v7m_pop(env);
|
| 555 |
env->regs[1] = v7m_pop(env);
|
| 556 |
env->regs[2] = v7m_pop(env);
|
| 557 |
env->regs[3] = v7m_pop(env);
|
| 558 |
env->regs[12] = v7m_pop(env);
|
| 559 |
env->regs[14] = v7m_pop(env);
|
| 560 |
env->regs[15] = v7m_pop(env);
|
| 561 |
xpsr = v7m_pop(env); |
| 562 |
xpsr_write(env, xpsr, 0xfffffdff);
|
| 563 |
/* Undo stack alignment. */
|
| 564 |
if (xpsr & 0x200) |
| 565 |
env->regs[13] |= 4; |
| 566 |
/* ??? The exception return type specifies Thread/Handler mode. However
|
| 567 |
this is also implied by the xPSR value. Not sure what to do
|
| 568 |
if there is a mismatch. */
|
| 569 |
/* ??? Likewise for mismatches between the CONTROL register and the stack
|
| 570 |
pointer. */
|
| 571 |
} |
| 572 |
|
| 573 |
static void do_interrupt_v7m(CPUARMState *env) |
| 574 |
{
|
| 575 |
uint32_t xpsr = xpsr_read(env); |
| 576 |
uint32_t lr; |
| 577 |
uint32_t addr; |
| 578 |
|
| 579 |
lr = 0xfffffff1;
|
| 580 |
if (env->v7m.current_sp)
|
| 581 |
lr |= 4;
|
| 582 |
if (env->v7m.exception == 0) |
| 583 |
lr |= 8;
|
| 584 |
|
| 585 |
/* For exceptions we just mark as pending on the NVIC, and let that
|
| 586 |
handle it. */
|
| 587 |
/* TODO: Need to escalate if the current priority is higher than the
|
| 588 |
one we're raising. */
|
| 589 |
switch (env->exception_index) {
|
| 590 |
case EXCP_UDEF:
|
| 591 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE); |
| 592 |
return;
|
| 593 |
case EXCP_SWI:
|
| 594 |
env->regs[15] += 2; |
| 595 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC); |
| 596 |
return;
|
| 597 |
case EXCP_PREFETCH_ABORT:
|
| 598 |
case EXCP_DATA_ABORT:
|
| 599 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM); |
| 600 |
return;
|
| 601 |
case EXCP_BKPT:
|
| 602 |
if (semihosting_enabled) {
|
| 603 |
int nr;
|
| 604 |
nr = arm_lduw_code(env->regs[15], env->bswap_code) & 0xff; |
| 605 |
if (nr == 0xab) { |
| 606 |
env->regs[15] += 2; |
| 607 |
env->regs[0] = do_arm_semihosting(env);
|
| 608 |
return;
|
| 609 |
} |
| 610 |
} |
| 611 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG); |
| 612 |
return;
|
| 613 |
case EXCP_IRQ:
|
| 614 |
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic); |
| 615 |
break;
|
| 616 |
case EXCP_EXCEPTION_EXIT:
|
| 617 |
do_v7m_exception_exit(env); |
| 618 |
return;
|
| 619 |
default:
|
| 620 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
| 621 |
return; /* Never happens. Keep compiler happy. */ |
| 622 |
} |
| 623 |
|
| 624 |
/* Align stack pointer. */
|
| 625 |
/* ??? Should only do this if Configuration Control Register
|
| 626 |
STACKALIGN bit is set. */
|
| 627 |
if (env->regs[13] & 4) { |
| 628 |
env->regs[13] -= 4; |
| 629 |
xpsr |= 0x200;
|
| 630 |
} |
| 631 |
/* Switch to the handler mode. */
|
| 632 |
v7m_push(env, xpsr); |
| 633 |
v7m_push(env, env->regs[15]);
|
| 634 |
v7m_push(env, env->regs[14]);
|
| 635 |
v7m_push(env, env->regs[12]);
|
| 636 |
v7m_push(env, env->regs[3]);
|
| 637 |
v7m_push(env, env->regs[2]);
|
| 638 |
v7m_push(env, env->regs[1]);
|
| 639 |
v7m_push(env, env->regs[0]);
|
| 640 |
switch_v7m_sp(env, 0);
|
| 641 |
/* Clear IT bits */
|
| 642 |
env->condexec_bits = 0;
|
| 643 |
env->regs[14] = lr;
|
| 644 |
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
|
| 645 |
env->regs[15] = addr & 0xfffffffe; |
| 646 |
env->thumb = addr & 1;
|
| 647 |
} |
| 648 |
|
| 649 |
/* Handle a CPU exception. */
|
| 650 |
void do_interrupt(CPUARMState *env)
|
| 651 |
{
|
| 652 |
uint32_t addr; |
| 653 |
uint32_t mask; |
| 654 |
int new_mode;
|
| 655 |
uint32_t offset; |
| 656 |
|
| 657 |
if (IS_M(env)) {
|
| 658 |
do_interrupt_v7m(env); |
| 659 |
return;
|
| 660 |
} |
| 661 |
/* TODO: Vectored interrupt controller. */
|
| 662 |
switch (env->exception_index) {
|
| 663 |
case EXCP_UDEF:
|
| 664 |
new_mode = ARM_CPU_MODE_UND; |
| 665 |
addr = 0x04;
|
| 666 |
mask = CPSR_I; |
| 667 |
if (env->thumb)
|
| 668 |
offset = 2;
|
| 669 |
else
|
| 670 |
offset = 4;
|
| 671 |
break;
|
| 672 |
case EXCP_SWI:
|
| 673 |
if (semihosting_enabled) {
|
| 674 |
/* Check for semihosting interrupt. */
|
| 675 |
if (env->thumb) {
|
| 676 |
mask = arm_lduw_code(env->regs[15] - 2, env->bswap_code) & 0xff; |
| 677 |
} else {
|
| 678 |
mask = arm_ldl_code(env->regs[15] - 4, env->bswap_code) |
| 679 |
& 0xffffff;
|
| 680 |
} |
| 681 |
/* Only intercept calls from privileged modes, to provide some
|
| 682 |
semblance of security. */
|
| 683 |
if (((mask == 0x123456 && !env->thumb) |
| 684 |
|| (mask == 0xab && env->thumb))
|
| 685 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
|
| 686 |
env->regs[0] = do_arm_semihosting(env);
|
| 687 |
return;
|
| 688 |
} |
| 689 |
} |
| 690 |
new_mode = ARM_CPU_MODE_SVC; |
| 691 |
addr = 0x08;
|
| 692 |
mask = CPSR_I; |
| 693 |
/* The PC already points to the next instruction. */
|
| 694 |
offset = 0;
|
| 695 |
break;
|
| 696 |
case EXCP_BKPT:
|
| 697 |
/* See if this is a semihosting syscall. */
|
| 698 |
if (env->thumb && semihosting_enabled) {
|
| 699 |
mask = arm_lduw_code(env->regs[15], env->bswap_code) & 0xff; |
| 700 |
if (mask == 0xab |
| 701 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
|
| 702 |
env->regs[15] += 2; |
| 703 |
env->regs[0] = do_arm_semihosting(env);
|
| 704 |
return;
|
| 705 |
} |
| 706 |
} |
| 707 |
env->cp15.c5_insn = 2;
|
| 708 |
/* Fall through to prefetch abort. */
|
| 709 |
case EXCP_PREFETCH_ABORT:
|
| 710 |
new_mode = ARM_CPU_MODE_ABT; |
| 711 |
addr = 0x0c;
|
| 712 |
mask = CPSR_A | CPSR_I; |
| 713 |
offset = 4;
|
| 714 |
break;
|
| 715 |
case EXCP_DATA_ABORT:
|
| 716 |
new_mode = ARM_CPU_MODE_ABT; |
| 717 |
addr = 0x10;
|
| 718 |
mask = CPSR_A | CPSR_I; |
| 719 |
offset = 8;
|
| 720 |
break;
|
| 721 |
case EXCP_IRQ:
|
| 722 |
new_mode = ARM_CPU_MODE_IRQ; |
| 723 |
addr = 0x18;
|
| 724 |
/* Disable IRQ and imprecise data aborts. */
|
| 725 |
mask = CPSR_A | CPSR_I; |
| 726 |
offset = 4;
|
| 727 |
break;
|
| 728 |
case EXCP_FIQ:
|
| 729 |
new_mode = ARM_CPU_MODE_FIQ; |
| 730 |
addr = 0x1c;
|
| 731 |
/* Disable FIQ, IRQ and imprecise data aborts. */
|
| 732 |
mask = CPSR_A | CPSR_I | CPSR_F; |
| 733 |
offset = 4;
|
| 734 |
break;
|
| 735 |
default:
|
| 736 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
| 737 |
return; /* Never happens. Keep compiler happy. */ |
| 738 |
} |
| 739 |
/* High vectors. */
|
| 740 |
if (env->cp15.c1_sys & (1 << 13)) { |
| 741 |
addr += 0xffff0000;
|
| 742 |
} |
| 743 |
switch_mode (env, new_mode); |
| 744 |
env->spsr = cpsr_read(env); |
| 745 |
/* Clear IT bits. */
|
| 746 |
env->condexec_bits = 0;
|
| 747 |
/* Switch to the new mode, and to the correct instruction set. */
|
| 748 |
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode; |
| 749 |
env->uncached_cpsr |= mask; |
| 750 |
/* this is a lie, as the was no c1_sys on V4T/V5, but who cares
|
| 751 |
* and we should just guard the thumb mode on V4 */
|
| 752 |
if (arm_feature(env, ARM_FEATURE_V4T)) {
|
| 753 |
env->thumb = (env->cp15.c1_sys & (1 << 30)) != 0; |
| 754 |
} |
| 755 |
env->regs[14] = env->regs[15] + offset; |
| 756 |
env->regs[15] = addr;
|
| 757 |
env->interrupt_request |= CPU_INTERRUPT_EXITTB; |
| 758 |
} |
| 759 |
|
| 760 |
/* Check section/page access permissions.
|
| 761 |
Returns the page protection flags, or zero if the access is not
|
| 762 |
permitted. */
|
| 763 |
static inline int check_ap(CPUARMState *env, int ap, int domain_prot, |
| 764 |
int access_type, int is_user) |
| 765 |
{
|
| 766 |
int prot_ro;
|
| 767 |
|
| 768 |
if (domain_prot == 3) { |
| 769 |
return PAGE_READ | PAGE_WRITE;
|
| 770 |
} |
| 771 |
|
| 772 |
if (access_type == 1) |
| 773 |
prot_ro = 0;
|
| 774 |
else
|
| 775 |
prot_ro = PAGE_READ; |
| 776 |
|
| 777 |
switch (ap) {
|
| 778 |
case 0: |
| 779 |
if (access_type == 1) |
| 780 |
return 0; |
| 781 |
switch ((env->cp15.c1_sys >> 8) & 3) { |
| 782 |
case 1: |
| 783 |
return is_user ? 0 : PAGE_READ; |
| 784 |
case 2: |
| 785 |
return PAGE_READ;
|
| 786 |
default:
|
| 787 |
return 0; |
| 788 |
} |
| 789 |
case 1: |
| 790 |
return is_user ? 0 : PAGE_READ | PAGE_WRITE; |
| 791 |
case 2: |
| 792 |
if (is_user)
|
| 793 |
return prot_ro;
|
| 794 |
else
|
| 795 |
return PAGE_READ | PAGE_WRITE;
|
| 796 |
case 3: |
| 797 |
return PAGE_READ | PAGE_WRITE;
|
| 798 |
case 4: /* Reserved. */ |
| 799 |
return 0; |
| 800 |
case 5: |
| 801 |
return is_user ? 0 : prot_ro; |
| 802 |
case 6: |
| 803 |
return prot_ro;
|
| 804 |
case 7: |
| 805 |
if (!arm_feature (env, ARM_FEATURE_V6K))
|
| 806 |
return 0; |
| 807 |
return prot_ro;
|
| 808 |
default:
|
| 809 |
abort(); |
| 810 |
} |
| 811 |
} |
| 812 |
|
| 813 |
static uint32_t get_level1_table_address(CPUARMState *env, uint32_t address)
|
| 814 |
{
|
| 815 |
uint32_t table; |
| 816 |
|
| 817 |
if (address & env->cp15.c2_mask)
|
| 818 |
table = env->cp15.c2_base1 & 0xffffc000;
|
| 819 |
else
|
| 820 |
table = env->cp15.c2_base0 & env->cp15.c2_base_mask; |
| 821 |
|
| 822 |
table |= (address >> 18) & 0x3ffc; |
| 823 |
return table;
|
| 824 |
} |
| 825 |
|
| 826 |
static int get_phys_addr_v5(CPUARMState *env, uint32_t address, int access_type, |
| 827 |
int is_user, uint32_t *phys_ptr, int *prot, |
| 828 |
target_ulong *page_size) |
| 829 |
{
|
| 830 |
int code;
|
| 831 |
uint32_t table; |
| 832 |
uint32_t desc; |
| 833 |
int type;
|
| 834 |
int ap;
|
| 835 |
int domain;
|
| 836 |
int domain_prot;
|
| 837 |
uint32_t phys_addr; |
| 838 |
|
| 839 |
/* Pagetable walk. */
|
| 840 |
/* Lookup l1 descriptor. */
|
| 841 |
table = get_level1_table_address(env, address); |
| 842 |
desc = ldl_phys(table); |
| 843 |
type = (desc & 3);
|
| 844 |
domain = (desc >> 5) & 0x0f; |
| 845 |
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3; |
| 846 |
if (type == 0) { |
| 847 |
/* Section translation fault. */
|
| 848 |
code = 5;
|
| 849 |
goto do_fault;
|
| 850 |
} |
| 851 |
if (domain_prot == 0 || domain_prot == 2) { |
| 852 |
if (type == 2) |
| 853 |
code = 9; /* Section domain fault. */ |
| 854 |
else
|
| 855 |
code = 11; /* Page domain fault. */ |
| 856 |
goto do_fault;
|
| 857 |
} |
| 858 |
if (type == 2) { |
| 859 |
/* 1Mb section. */
|
| 860 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
| 861 |
ap = (desc >> 10) & 3; |
| 862 |
code = 13;
|
| 863 |
*page_size = 1024 * 1024; |
| 864 |
} else {
|
| 865 |
/* Lookup l2 entry. */
|
| 866 |
if (type == 1) { |
| 867 |
/* Coarse pagetable. */
|
| 868 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
| 869 |
} else {
|
| 870 |
/* Fine pagetable. */
|
| 871 |
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc); |
| 872 |
} |
| 873 |
desc = ldl_phys(table); |
| 874 |
switch (desc & 3) { |
| 875 |
case 0: /* Page translation fault. */ |
| 876 |
code = 7;
|
| 877 |
goto do_fault;
|
| 878 |
case 1: /* 64k page. */ |
| 879 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
| 880 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
| 881 |
*page_size = 0x10000;
|
| 882 |
break;
|
| 883 |
case 2: /* 4k page. */ |
| 884 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
| 885 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
| 886 |
*page_size = 0x1000;
|
| 887 |
break;
|
| 888 |
case 3: /* 1k page. */ |
| 889 |
if (type == 1) { |
| 890 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 891 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
| 892 |
} else {
|
| 893 |
/* Page translation fault. */
|
| 894 |
code = 7;
|
| 895 |
goto do_fault;
|
| 896 |
} |
| 897 |
} else {
|
| 898 |
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff); |
| 899 |
} |
| 900 |
ap = (desc >> 4) & 3; |
| 901 |
*page_size = 0x400;
|
| 902 |
break;
|
| 903 |
default:
|
| 904 |
/* Never happens, but compiler isn't smart enough to tell. */
|
| 905 |
abort(); |
| 906 |
} |
| 907 |
code = 15;
|
| 908 |
} |
| 909 |
*prot = check_ap(env, ap, domain_prot, access_type, is_user); |
| 910 |
if (!*prot) {
|
| 911 |
/* Access permission fault. */
|
| 912 |
goto do_fault;
|
| 913 |
} |
| 914 |
*prot |= PAGE_EXEC; |
| 915 |
*phys_ptr = phys_addr; |
| 916 |
return 0; |
| 917 |
do_fault:
|
| 918 |
return code | (domain << 4); |
| 919 |
} |
| 920 |
|
| 921 |
static int get_phys_addr_v6(CPUARMState *env, uint32_t address, int access_type, |
| 922 |
int is_user, uint32_t *phys_ptr, int *prot, |
| 923 |
target_ulong *page_size) |
| 924 |
{
|
| 925 |
int code;
|
| 926 |
uint32_t table; |
| 927 |
uint32_t desc; |
| 928 |
uint32_t xn; |
| 929 |
int type;
|
| 930 |
int ap;
|
| 931 |
int domain;
|
| 932 |
int domain_prot;
|
| 933 |
uint32_t phys_addr; |
| 934 |
|
| 935 |
/* Pagetable walk. */
|
| 936 |
/* Lookup l1 descriptor. */
|
| 937 |
table = get_level1_table_address(env, address); |
| 938 |
desc = ldl_phys(table); |
| 939 |
type = (desc & 3);
|
| 940 |
if (type == 0) { |
| 941 |
/* Section translation fault. */
|
| 942 |
code = 5;
|
| 943 |
domain = 0;
|
| 944 |
goto do_fault;
|
| 945 |
} else if (type == 2 && (desc & (1 << 18))) { |
| 946 |
/* Supersection. */
|
| 947 |
domain = 0;
|
| 948 |
} else {
|
| 949 |
/* Section or page. */
|
| 950 |
domain = (desc >> 5) & 0x0f; |
| 951 |
} |
| 952 |
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3; |
| 953 |
if (domain_prot == 0 || domain_prot == 2) { |
| 954 |
if (type == 2) |
| 955 |
code = 9; /* Section domain fault. */ |
| 956 |
else
|
| 957 |
code = 11; /* Page domain fault. */ |
| 958 |
goto do_fault;
|
| 959 |
} |
| 960 |
if (type == 2) { |
| 961 |
if (desc & (1 << 18)) { |
| 962 |
/* Supersection. */
|
| 963 |
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff); |
| 964 |
*page_size = 0x1000000;
|
| 965 |
} else {
|
| 966 |
/* Section. */
|
| 967 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
| 968 |
*page_size = 0x100000;
|
| 969 |
} |
| 970 |
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4); |
| 971 |
xn = desc & (1 << 4); |
| 972 |
code = 13;
|
| 973 |
} else {
|
| 974 |
/* Lookup l2 entry. */
|
| 975 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
| 976 |
desc = ldl_phys(table); |
| 977 |
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4); |
| 978 |
switch (desc & 3) { |
| 979 |
case 0: /* Page translation fault. */ |
| 980 |
code = 7;
|
| 981 |
goto do_fault;
|
| 982 |
case 1: /* 64k page. */ |
| 983 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
| 984 |
xn = desc & (1 << 15); |
| 985 |
*page_size = 0x10000;
|
| 986 |
break;
|
| 987 |
case 2: case 3: /* 4k page. */ |
| 988 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
| 989 |
xn = desc & 1;
|
| 990 |
*page_size = 0x1000;
|
| 991 |
break;
|
| 992 |
default:
|
| 993 |
/* Never happens, but compiler isn't smart enough to tell. */
|
| 994 |
abort(); |
| 995 |
} |
| 996 |
code = 15;
|
| 997 |
} |
| 998 |
if (domain_prot == 3) { |
| 999 |
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
| 1000 |
} else {
|
| 1001 |
if (xn && access_type == 2) |
| 1002 |
goto do_fault;
|
| 1003 |
|
| 1004 |
/* The simplified model uses AP[0] as an access control bit. */
|
| 1005 |
if ((env->cp15.c1_sys & (1 << 29)) && (ap & 1) == 0) { |
| 1006 |
/* Access flag fault. */
|
| 1007 |
code = (code == 15) ? 6 : 3; |
| 1008 |
goto do_fault;
|
| 1009 |
} |
| 1010 |
*prot = check_ap(env, ap, domain_prot, access_type, is_user); |
| 1011 |
if (!*prot) {
|
| 1012 |
/* Access permission fault. */
|
| 1013 |
goto do_fault;
|
| 1014 |
} |
| 1015 |
if (!xn) {
|
| 1016 |
*prot |= PAGE_EXEC; |
| 1017 |
} |
| 1018 |
} |
| 1019 |
*phys_ptr = phys_addr; |
| 1020 |
return 0; |
| 1021 |
do_fault:
|
| 1022 |
return code | (domain << 4); |
| 1023 |
} |
| 1024 |
|
| 1025 |
static int get_phys_addr_mpu(CPUARMState *env, uint32_t address, int access_type, |
| 1026 |
int is_user, uint32_t *phys_ptr, int *prot) |
| 1027 |
{
|
| 1028 |
int n;
|
| 1029 |
uint32_t mask; |
| 1030 |
uint32_t base; |
| 1031 |
|
| 1032 |
*phys_ptr = address; |
| 1033 |
for (n = 7; n >= 0; n--) { |
| 1034 |
base = env->cp15.c6_region[n]; |
| 1035 |
if ((base & 1) == 0) |
| 1036 |
continue;
|
| 1037 |
mask = 1 << ((base >> 1) & 0x1f); |
| 1038 |
/* Keep this shift separate from the above to avoid an
|
| 1039 |
(undefined) << 32. */
|
| 1040 |
mask = (mask << 1) - 1; |
| 1041 |
if (((base ^ address) & ~mask) == 0) |
| 1042 |
break;
|
| 1043 |
} |
| 1044 |
if (n < 0) |
| 1045 |
return 2; |
| 1046 |
|
| 1047 |
if (access_type == 2) { |
| 1048 |
mask = env->cp15.c5_insn; |
| 1049 |
} else {
|
| 1050 |
mask = env->cp15.c5_data; |
| 1051 |
} |
| 1052 |
mask = (mask >> (n * 4)) & 0xf; |
| 1053 |
switch (mask) {
|
| 1054 |
case 0: |
| 1055 |
return 1; |
| 1056 |
case 1: |
| 1057 |
if (is_user)
|
| 1058 |
return 1; |
| 1059 |
*prot = PAGE_READ | PAGE_WRITE; |
| 1060 |
break;
|
| 1061 |
case 2: |
| 1062 |
*prot = PAGE_READ; |
| 1063 |
if (!is_user)
|
| 1064 |
*prot |= PAGE_WRITE; |
| 1065 |
break;
|
| 1066 |
case 3: |
| 1067 |
*prot = PAGE_READ | PAGE_WRITE; |
| 1068 |
break;
|
| 1069 |
case 5: |
| 1070 |
if (is_user)
|
| 1071 |
return 1; |
| 1072 |
*prot = PAGE_READ; |
| 1073 |
break;
|
| 1074 |
case 6: |
| 1075 |
*prot = PAGE_READ; |
| 1076 |
break;
|
| 1077 |
default:
|
| 1078 |
/* Bad permission. */
|
| 1079 |
return 1; |
| 1080 |
} |
| 1081 |
*prot |= PAGE_EXEC; |
| 1082 |
return 0; |
| 1083 |
} |
| 1084 |
|
| 1085 |
static inline int get_phys_addr(CPUARMState *env, uint32_t address, |
| 1086 |
int access_type, int is_user, |
| 1087 |
uint32_t *phys_ptr, int *prot,
|
| 1088 |
target_ulong *page_size) |
| 1089 |
{
|
| 1090 |
/* Fast Context Switch Extension. */
|
| 1091 |
if (address < 0x02000000) |
| 1092 |
address += env->cp15.c13_fcse; |
| 1093 |
|
| 1094 |
if ((env->cp15.c1_sys & 1) == 0) { |
| 1095 |
/* MMU/MPU disabled. */
|
| 1096 |
*phys_ptr = address; |
| 1097 |
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
| 1098 |
*page_size = TARGET_PAGE_SIZE; |
| 1099 |
return 0; |
| 1100 |
} else if (arm_feature(env, ARM_FEATURE_MPU)) { |
| 1101 |
*page_size = TARGET_PAGE_SIZE; |
| 1102 |
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
|
| 1103 |
prot); |
| 1104 |
} else if (env->cp15.c1_sys & (1 << 23)) { |
| 1105 |
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
|
| 1106 |
prot, page_size); |
| 1107 |
} else {
|
| 1108 |
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
|
| 1109 |
prot, page_size); |
| 1110 |
} |
| 1111 |
} |
| 1112 |
|
| 1113 |
int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address,
|
| 1114 |
int access_type, int mmu_idx) |
| 1115 |
{
|
| 1116 |
uint32_t phys_addr; |
| 1117 |
target_ulong page_size; |
| 1118 |
int prot;
|
| 1119 |
int ret, is_user;
|
| 1120 |
|
| 1121 |
is_user = mmu_idx == MMU_USER_IDX; |
| 1122 |
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot, |
| 1123 |
&page_size); |
| 1124 |
if (ret == 0) { |
| 1125 |
/* Map a single [sub]page. */
|
| 1126 |
phys_addr &= ~(uint32_t)0x3ff;
|
| 1127 |
address &= ~(uint32_t)0x3ff;
|
| 1128 |
tlb_set_page (env, address, phys_addr, prot, mmu_idx, page_size); |
| 1129 |
return 0; |
| 1130 |
} |
| 1131 |
|
| 1132 |
if (access_type == 2) { |
| 1133 |
env->cp15.c5_insn = ret; |
| 1134 |
env->cp15.c6_insn = address; |
| 1135 |
env->exception_index = EXCP_PREFETCH_ABORT; |
| 1136 |
} else {
|
| 1137 |
env->cp15.c5_data = ret; |
| 1138 |
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) |
| 1139 |
env->cp15.c5_data |= (1 << 11); |
| 1140 |
env->cp15.c6_data = address; |
| 1141 |
env->exception_index = EXCP_DATA_ABORT; |
| 1142 |
} |
| 1143 |
return 1; |
| 1144 |
} |
| 1145 |
|
| 1146 |
target_phys_addr_t cpu_get_phys_page_debug(CPUARMState *env, target_ulong addr) |
| 1147 |
{
|
| 1148 |
uint32_t phys_addr; |
| 1149 |
target_ulong page_size; |
| 1150 |
int prot;
|
| 1151 |
int ret;
|
| 1152 |
|
| 1153 |
ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot, &page_size); |
| 1154 |
|
| 1155 |
if (ret != 0) |
| 1156 |
return -1; |
| 1157 |
|
| 1158 |
return phys_addr;
|
| 1159 |
} |
| 1160 |
|
| 1161 |
/* Return basic MPU access permission bits. */
|
| 1162 |
static uint32_t simple_mpu_ap_bits(uint32_t val)
|
| 1163 |
{
|
| 1164 |
uint32_t ret; |
| 1165 |
uint32_t mask; |
| 1166 |
int i;
|
| 1167 |
ret = 0;
|
| 1168 |
mask = 3;
|
| 1169 |
for (i = 0; i < 16; i += 2) { |
| 1170 |
ret |= (val >> i) & mask; |
| 1171 |
mask <<= 2;
|
| 1172 |
} |
| 1173 |
return ret;
|
| 1174 |
} |
| 1175 |
|
| 1176 |
/* Pad basic MPU access permission bits to extended format. */
|
| 1177 |
static uint32_t extended_mpu_ap_bits(uint32_t val)
|
| 1178 |
{
|
| 1179 |
uint32_t ret; |
| 1180 |
uint32_t mask; |
| 1181 |
int i;
|
| 1182 |
ret = 0;
|
| 1183 |
mask = 3;
|
| 1184 |
for (i = 0; i < 16; i += 2) { |
| 1185 |
ret |= (val & mask) << i; |
| 1186 |
mask <<= 2;
|
| 1187 |
} |
| 1188 |
return ret;
|
| 1189 |
} |
| 1190 |
|
| 1191 |
void HELPER(set_cp15)(CPUARMState *env, uint32_t insn, uint32_t val)
|
| 1192 |
{
|
| 1193 |
int op1;
|
| 1194 |
int op2;
|
| 1195 |
int crm;
|
| 1196 |
|
| 1197 |
op1 = (insn >> 21) & 7; |
| 1198 |
op2 = (insn >> 5) & 7; |
| 1199 |
crm = insn & 0xf;
|
| 1200 |
switch ((insn >> 16) & 0xf) { |
| 1201 |
case 0: |
| 1202 |
/* ID codes. */
|
| 1203 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
| 1204 |
break;
|
| 1205 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1206 |
break;
|
| 1207 |
if (arm_feature(env, ARM_FEATURE_V7)
|
| 1208 |
&& op1 == 2 && crm == 0 && op2 == 0) { |
| 1209 |
env->cp15.c0_cssel = val & 0xf;
|
| 1210 |
break;
|
| 1211 |
} |
| 1212 |
goto bad_reg;
|
| 1213 |
case 1: /* System configuration. */ |
| 1214 |
if (arm_feature(env, ARM_FEATURE_V7)
|
| 1215 |
&& op1 == 0 && crm == 1 && op2 == 0) { |
| 1216 |
env->cp15.c1_scr = val; |
| 1217 |
break;
|
| 1218 |
} |
| 1219 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1220 |
op2 = 0;
|
| 1221 |
switch (op2) {
|
| 1222 |
case 0: |
| 1223 |
if (!arm_feature(env, ARM_FEATURE_XSCALE) || crm == 0) |
| 1224 |
env->cp15.c1_sys = val; |
| 1225 |
/* ??? Lots of these bits are not implemented. */
|
| 1226 |
/* This may enable/disable the MMU, so do a TLB flush. */
|
| 1227 |
tlb_flush(env, 1);
|
| 1228 |
break;
|
| 1229 |
case 1: /* Auxiliary control register. */ |
| 1230 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 1231 |
env->cp15.c1_xscaleauxcr = val; |
| 1232 |
break;
|
| 1233 |
} |
| 1234 |
/* Not implemented. */
|
| 1235 |
break;
|
| 1236 |
case 2: |
| 1237 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
| 1238 |
goto bad_reg;
|
| 1239 |
if (env->cp15.c1_coproc != val) {
|
| 1240 |
env->cp15.c1_coproc = val; |
| 1241 |
/* ??? Is this safe when called from within a TB? */
|
| 1242 |
tb_flush(env); |
| 1243 |
} |
| 1244 |
break;
|
| 1245 |
default:
|
| 1246 |
goto bad_reg;
|
| 1247 |
} |
| 1248 |
break;
|
| 1249 |
case 2: /* MMU Page table control / MPU cache control. */ |
| 1250 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
| 1251 |
switch (op2) {
|
| 1252 |
case 0: |
| 1253 |
env->cp15.c2_data = val; |
| 1254 |
break;
|
| 1255 |
case 1: |
| 1256 |
env->cp15.c2_insn = val; |
| 1257 |
break;
|
| 1258 |
default:
|
| 1259 |
goto bad_reg;
|
| 1260 |
} |
| 1261 |
} else {
|
| 1262 |
switch (op2) {
|
| 1263 |
case 0: |
| 1264 |
env->cp15.c2_base0 = val; |
| 1265 |
break;
|
| 1266 |
case 1: |
| 1267 |
env->cp15.c2_base1 = val; |
| 1268 |
break;
|
| 1269 |
case 2: |
| 1270 |
val &= 7;
|
| 1271 |
env->cp15.c2_control = val; |
| 1272 |
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val);
|
| 1273 |
env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> val);
|
| 1274 |
break;
|
| 1275 |
default:
|
| 1276 |
goto bad_reg;
|
| 1277 |
} |
| 1278 |
} |
| 1279 |
break;
|
| 1280 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
| 1281 |
env->cp15.c3 = val; |
| 1282 |
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */ |
| 1283 |
break;
|
| 1284 |
case 4: /* Reserved. */ |
| 1285 |
goto bad_reg;
|
| 1286 |
case 5: /* MMU Fault status / MPU access permission. */ |
| 1287 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1288 |
op2 = 0;
|
| 1289 |
switch (op2) {
|
| 1290 |
case 0: |
| 1291 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
| 1292 |
val = extended_mpu_ap_bits(val); |
| 1293 |
env->cp15.c5_data = val; |
| 1294 |
break;
|
| 1295 |
case 1: |
| 1296 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
| 1297 |
val = extended_mpu_ap_bits(val); |
| 1298 |
env->cp15.c5_insn = val; |
| 1299 |
break;
|
| 1300 |
case 2: |
| 1301 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
| 1302 |
goto bad_reg;
|
| 1303 |
env->cp15.c5_data = val; |
| 1304 |
break;
|
| 1305 |
case 3: |
| 1306 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
| 1307 |
goto bad_reg;
|
| 1308 |
env->cp15.c5_insn = val; |
| 1309 |
break;
|
| 1310 |
default:
|
| 1311 |
goto bad_reg;
|
| 1312 |
} |
| 1313 |
break;
|
| 1314 |
case 6: /* MMU Fault address / MPU base/size. */ |
| 1315 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
| 1316 |
if (crm >= 8) |
| 1317 |
goto bad_reg;
|
| 1318 |
env->cp15.c6_region[crm] = val; |
| 1319 |
} else {
|
| 1320 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1321 |
op2 = 0;
|
| 1322 |
switch (op2) {
|
| 1323 |
case 0: |
| 1324 |
env->cp15.c6_data = val; |
| 1325 |
break;
|
| 1326 |
case 1: /* ??? This is WFAR on armv6 */ |
| 1327 |
case 2: |
| 1328 |
env->cp15.c6_insn = val; |
| 1329 |
break;
|
| 1330 |
default:
|
| 1331 |
goto bad_reg;
|
| 1332 |
} |
| 1333 |
} |
| 1334 |
break;
|
| 1335 |
case 7: /* Cache control. */ |
| 1336 |
env->cp15.c15_i_max = 0x000;
|
| 1337 |
env->cp15.c15_i_min = 0xff0;
|
| 1338 |
if (op1 != 0) { |
| 1339 |
goto bad_reg;
|
| 1340 |
} |
| 1341 |
/* No cache, so nothing to do except VA->PA translations. */
|
| 1342 |
if (arm_feature(env, ARM_FEATURE_VAPA)) {
|
| 1343 |
switch (crm) {
|
| 1344 |
case 4: |
| 1345 |
if (arm_feature(env, ARM_FEATURE_V7)) {
|
| 1346 |
env->cp15.c7_par = val & 0xfffff6ff;
|
| 1347 |
} else {
|
| 1348 |
env->cp15.c7_par = val & 0xfffff1ff;
|
| 1349 |
} |
| 1350 |
break;
|
| 1351 |
case 8: { |
| 1352 |
uint32_t phys_addr; |
| 1353 |
target_ulong page_size; |
| 1354 |
int prot;
|
| 1355 |
int ret, is_user = op2 & 2; |
| 1356 |
int access_type = op2 & 1; |
| 1357 |
|
| 1358 |
if (op2 & 4) { |
| 1359 |
/* Other states are only available with TrustZone */
|
| 1360 |
goto bad_reg;
|
| 1361 |
} |
| 1362 |
ret = get_phys_addr(env, val, access_type, is_user, |
| 1363 |
&phys_addr, &prot, &page_size); |
| 1364 |
if (ret == 0) { |
| 1365 |
/* We do not set any attribute bits in the PAR */
|
| 1366 |
if (page_size == (1 << 24) |
| 1367 |
&& arm_feature(env, ARM_FEATURE_V7)) {
|
| 1368 |
env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1; |
| 1369 |
} else {
|
| 1370 |
env->cp15.c7_par = phys_addr & 0xfffff000;
|
| 1371 |
} |
| 1372 |
} else {
|
| 1373 |
env->cp15.c7_par = ((ret & (10 << 1)) >> 5) | |
| 1374 |
((ret & (12 << 1)) >> 6) | |
| 1375 |
((ret & 0xf) << 1) | 1; |
| 1376 |
} |
| 1377 |
break;
|
| 1378 |
} |
| 1379 |
} |
| 1380 |
} |
| 1381 |
break;
|
| 1382 |
case 8: /* MMU TLB control. */ |
| 1383 |
switch (op2) {
|
| 1384 |
case 0: /* Invalidate all (TLBIALL) */ |
| 1385 |
tlb_flush(env, 1);
|
| 1386 |
break;
|
| 1387 |
case 1: /* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */ |
| 1388 |
tlb_flush_page(env, val & TARGET_PAGE_MASK); |
| 1389 |
break;
|
| 1390 |
case 2: /* Invalidate by ASID (TLBIASID) */ |
| 1391 |
tlb_flush(env, val == 0);
|
| 1392 |
break;
|
| 1393 |
case 3: /* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */ |
| 1394 |
tlb_flush_page(env, val & TARGET_PAGE_MASK); |
| 1395 |
break;
|
| 1396 |
default:
|
| 1397 |
goto bad_reg;
|
| 1398 |
} |
| 1399 |
break;
|
| 1400 |
case 9: |
| 1401 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1402 |
break;
|
| 1403 |
if (arm_feature(env, ARM_FEATURE_STRONGARM))
|
| 1404 |
break; /* Ignore ReadBuffer access */ |
| 1405 |
switch (crm) {
|
| 1406 |
case 0: /* Cache lockdown. */ |
| 1407 |
switch (op1) {
|
| 1408 |
case 0: /* L1 cache. */ |
| 1409 |
switch (op2) {
|
| 1410 |
case 0: |
| 1411 |
env->cp15.c9_data = val; |
| 1412 |
break;
|
| 1413 |
case 1: |
| 1414 |
env->cp15.c9_insn = val; |
| 1415 |
break;
|
| 1416 |
default:
|
| 1417 |
goto bad_reg;
|
| 1418 |
} |
| 1419 |
break;
|
| 1420 |
case 1: /* L2 cache. */ |
| 1421 |
/* Ignore writes to L2 lockdown/auxiliary registers. */
|
| 1422 |
break;
|
| 1423 |
default:
|
| 1424 |
goto bad_reg;
|
| 1425 |
} |
| 1426 |
break;
|
| 1427 |
case 1: /* TCM memory region registers. */ |
| 1428 |
/* Not implemented. */
|
| 1429 |
goto bad_reg;
|
| 1430 |
case 12: /* Performance monitor control */ |
| 1431 |
/* Performance monitors are implementation defined in v7,
|
| 1432 |
* but with an ARM recommended set of registers, which we
|
| 1433 |
* follow (although we don't actually implement any counters)
|
| 1434 |
*/
|
| 1435 |
if (!arm_feature(env, ARM_FEATURE_V7)) {
|
| 1436 |
goto bad_reg;
|
| 1437 |
} |
| 1438 |
switch (op2) {
|
| 1439 |
case 0: /* performance monitor control register */ |
| 1440 |
/* only the DP, X, D and E bits are writable */
|
| 1441 |
env->cp15.c9_pmcr &= ~0x39;
|
| 1442 |
env->cp15.c9_pmcr |= (val & 0x39);
|
| 1443 |
break;
|
| 1444 |
case 1: /* Count enable set register */ |
| 1445 |
val &= (1 << 31); |
| 1446 |
env->cp15.c9_pmcnten |= val; |
| 1447 |
break;
|
| 1448 |
case 2: /* Count enable clear */ |
| 1449 |
val &= (1 << 31); |
| 1450 |
env->cp15.c9_pmcnten &= ~val; |
| 1451 |
break;
|
| 1452 |
case 3: /* Overflow flag status */ |
| 1453 |
env->cp15.c9_pmovsr &= ~val; |
| 1454 |
break;
|
| 1455 |
case 4: /* Software increment */ |
| 1456 |
/* RAZ/WI since we don't implement the software-count event */
|
| 1457 |
break;
|
| 1458 |
case 5: /* Event counter selection register */ |
| 1459 |
/* Since we don't implement any events, writing to this register
|
| 1460 |
* is actually UNPREDICTABLE. So we choose to RAZ/WI.
|
| 1461 |
*/
|
| 1462 |
break;
|
| 1463 |
default:
|
| 1464 |
goto bad_reg;
|
| 1465 |
} |
| 1466 |
break;
|
| 1467 |
case 13: /* Performance counters */ |
| 1468 |
if (!arm_feature(env, ARM_FEATURE_V7)) {
|
| 1469 |
goto bad_reg;
|
| 1470 |
} |
| 1471 |
switch (op2) {
|
| 1472 |
case 0: /* Cycle count register: not implemented, so RAZ/WI */ |
| 1473 |
break;
|
| 1474 |
case 1: /* Event type select */ |
| 1475 |
env->cp15.c9_pmxevtyper = val & 0xff;
|
| 1476 |
break;
|
| 1477 |
case 2: /* Event count register */ |
| 1478 |
/* Unimplemented (we have no events), RAZ/WI */
|
| 1479 |
break;
|
| 1480 |
default:
|
| 1481 |
goto bad_reg;
|
| 1482 |
} |
| 1483 |
break;
|
| 1484 |
case 14: /* Performance monitor control */ |
| 1485 |
if (!arm_feature(env, ARM_FEATURE_V7)) {
|
| 1486 |
goto bad_reg;
|
| 1487 |
} |
| 1488 |
switch (op2) {
|
| 1489 |
case 0: /* user enable */ |
| 1490 |
env->cp15.c9_pmuserenr = val & 1;
|
| 1491 |
/* changes access rights for cp registers, so flush tbs */
|
| 1492 |
tb_flush(env); |
| 1493 |
break;
|
| 1494 |
case 1: /* interrupt enable set */ |
| 1495 |
/* We have no event counters so only the C bit can be changed */
|
| 1496 |
val &= (1 << 31); |
| 1497 |
env->cp15.c9_pminten |= val; |
| 1498 |
break;
|
| 1499 |
case 2: /* interrupt enable clear */ |
| 1500 |
val &= (1 << 31); |
| 1501 |
env->cp15.c9_pminten &= ~val; |
| 1502 |
break;
|
| 1503 |
} |
| 1504 |
break;
|
| 1505 |
default:
|
| 1506 |
goto bad_reg;
|
| 1507 |
} |
| 1508 |
break;
|
| 1509 |
case 10: /* MMU TLB lockdown. */ |
| 1510 |
/* ??? TLB lockdown not implemented. */
|
| 1511 |
break;
|
| 1512 |
case 12: /* Reserved. */ |
| 1513 |
goto bad_reg;
|
| 1514 |
case 13: /* Process ID. */ |
| 1515 |
switch (op2) {
|
| 1516 |
case 0: |
| 1517 |
/* Unlike real hardware the qemu TLB uses virtual addresses,
|
| 1518 |
not modified virtual addresses, so this causes a TLB flush.
|
| 1519 |
*/
|
| 1520 |
if (env->cp15.c13_fcse != val)
|
| 1521 |
tlb_flush(env, 1);
|
| 1522 |
env->cp15.c13_fcse = val; |
| 1523 |
break;
|
| 1524 |
case 1: |
| 1525 |
/* This changes the ASID, so do a TLB flush. */
|
| 1526 |
if (env->cp15.c13_context != val
|
| 1527 |
&& !arm_feature(env, ARM_FEATURE_MPU)) |
| 1528 |
tlb_flush(env, 0);
|
| 1529 |
env->cp15.c13_context = val; |
| 1530 |
break;
|
| 1531 |
default:
|
| 1532 |
goto bad_reg;
|
| 1533 |
} |
| 1534 |
break;
|
| 1535 |
case 14: /* Generic timer */ |
| 1536 |
if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) {
|
| 1537 |
/* Dummy implementation: RAZ/WI for all */
|
| 1538 |
break;
|
| 1539 |
} |
| 1540 |
goto bad_reg;
|
| 1541 |
case 15: /* Implementation specific. */ |
| 1542 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 1543 |
if (op2 == 0 && crm == 1) { |
| 1544 |
if (env->cp15.c15_cpar != (val & 0x3fff)) { |
| 1545 |
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
|
| 1546 |
tb_flush(env); |
| 1547 |
env->cp15.c15_cpar = val & 0x3fff;
|
| 1548 |
} |
| 1549 |
break;
|
| 1550 |
} |
| 1551 |
goto bad_reg;
|
| 1552 |
} |
| 1553 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
| 1554 |
switch (crm) {
|
| 1555 |
case 0: |
| 1556 |
break;
|
| 1557 |
case 1: /* Set TI925T configuration. */ |
| 1558 |
env->cp15.c15_ticonfig = val & 0xe7;
|
| 1559 |
env->cp15.c0_cpuid = (val & (1 << 5)) ? /* OS_TYPE bit */ |
| 1560 |
ARM_CPUID_TI915T : ARM_CPUID_TI925T; |
| 1561 |
break;
|
| 1562 |
case 2: /* Set I_max. */ |
| 1563 |
env->cp15.c15_i_max = val; |
| 1564 |
break;
|
| 1565 |
case 3: /* Set I_min. */ |
| 1566 |
env->cp15.c15_i_min = val; |
| 1567 |
break;
|
| 1568 |
case 4: /* Set thread-ID. */ |
| 1569 |
env->cp15.c15_threadid = val & 0xffff;
|
| 1570 |
break;
|
| 1571 |
case 8: /* Wait-for-interrupt (deprecated). */ |
| 1572 |
cpu_interrupt(env, CPU_INTERRUPT_HALT); |
| 1573 |
break;
|
| 1574 |
default:
|
| 1575 |
goto bad_reg;
|
| 1576 |
} |
| 1577 |
} |
| 1578 |
if (ARM_CPUID(env) == ARM_CPUID_CORTEXA9) {
|
| 1579 |
switch (crm) {
|
| 1580 |
case 0: |
| 1581 |
if ((op1 == 0) && (op2 == 0)) { |
| 1582 |
env->cp15.c15_power_control = val; |
| 1583 |
} else if ((op1 == 0) && (op2 == 1)) { |
| 1584 |
env->cp15.c15_diagnostic = val; |
| 1585 |
} else if ((op1 == 0) && (op2 == 2)) { |
| 1586 |
env->cp15.c15_power_diagnostic = val; |
| 1587 |
} |
| 1588 |
default:
|
| 1589 |
break;
|
| 1590 |
} |
| 1591 |
} |
| 1592 |
break;
|
| 1593 |
} |
| 1594 |
return;
|
| 1595 |
bad_reg:
|
| 1596 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
| 1597 |
cpu_abort(env, "Unimplemented cp15 register write (c%d, c%d, {%d, %d})\n",
|
| 1598 |
(insn >> 16) & 0xf, crm, op1, op2); |
| 1599 |
} |
| 1600 |
|
| 1601 |
uint32_t HELPER(get_cp15)(CPUARMState *env, uint32_t insn) |
| 1602 |
{
|
| 1603 |
int op1;
|
| 1604 |
int op2;
|
| 1605 |
int crm;
|
| 1606 |
|
| 1607 |
op1 = (insn >> 21) & 7; |
| 1608 |
op2 = (insn >> 5) & 7; |
| 1609 |
crm = insn & 0xf;
|
| 1610 |
switch ((insn >> 16) & 0xf) { |
| 1611 |
case 0: /* ID codes. */ |
| 1612 |
switch (op1) {
|
| 1613 |
case 0: |
| 1614 |
switch (crm) {
|
| 1615 |
case 0: |
| 1616 |
switch (op2) {
|
| 1617 |
case 0: /* Device ID. */ |
| 1618 |
return env->cp15.c0_cpuid;
|
| 1619 |
case 1: /* Cache Type. */ |
| 1620 |
return env->cp15.c0_cachetype;
|
| 1621 |
case 2: /* TCM status. */ |
| 1622 |
return 0; |
| 1623 |
case 3: /* TLB type register. */ |
| 1624 |
return 0; /* No lockable TLB entries. */ |
| 1625 |
case 5: /* MPIDR */ |
| 1626 |
/* The MPIDR was standardised in v7; prior to
|
| 1627 |
* this it was implemented only in the 11MPCore.
|
| 1628 |
* For all other pre-v7 cores it does not exist.
|
| 1629 |
*/
|
| 1630 |
if (arm_feature(env, ARM_FEATURE_V7) ||
|
| 1631 |
ARM_CPUID(env) == ARM_CPUID_ARM11MPCORE) {
|
| 1632 |
int mpidr = env->cpu_index;
|
| 1633 |
/* We don't support setting cluster ID ([8..11])
|
| 1634 |
* so these bits always RAZ.
|
| 1635 |
*/
|
| 1636 |
if (arm_feature(env, ARM_FEATURE_V7MP)) {
|
| 1637 |
mpidr |= (1 << 31); |
| 1638 |
/* Cores which are uniprocessor (non-coherent)
|
| 1639 |
* but still implement the MP extensions set
|
| 1640 |
* bit 30. (For instance, A9UP.) However we do
|
| 1641 |
* not currently model any of those cores.
|
| 1642 |
*/
|
| 1643 |
} |
| 1644 |
return mpidr;
|
| 1645 |
} |
| 1646 |
/* otherwise fall through to the unimplemented-reg case */
|
| 1647 |
default:
|
| 1648 |
goto bad_reg;
|
| 1649 |
} |
| 1650 |
case 1: |
| 1651 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
| 1652 |
goto bad_reg;
|
| 1653 |
return env->cp15.c0_c1[op2];
|
| 1654 |
case 2: |
| 1655 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
| 1656 |
goto bad_reg;
|
| 1657 |
return env->cp15.c0_c2[op2];
|
| 1658 |
case 3: case 4: case 5: case 6: case 7: |
| 1659 |
return 0; |
| 1660 |
default:
|
| 1661 |
goto bad_reg;
|
| 1662 |
} |
| 1663 |
case 1: |
| 1664 |
/* These registers aren't documented on arm11 cores. However
|
| 1665 |
Linux looks at them anyway. */
|
| 1666 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
| 1667 |
goto bad_reg;
|
| 1668 |
if (crm != 0) |
| 1669 |
goto bad_reg;
|
| 1670 |
if (!arm_feature(env, ARM_FEATURE_V7))
|
| 1671 |
return 0; |
| 1672 |
|
| 1673 |
switch (op2) {
|
| 1674 |
case 0: |
| 1675 |
return env->cp15.c0_ccsid[env->cp15.c0_cssel];
|
| 1676 |
case 1: |
| 1677 |
return env->cp15.c0_clid;
|
| 1678 |
case 7: |
| 1679 |
return 0; |
| 1680 |
} |
| 1681 |
goto bad_reg;
|
| 1682 |
case 2: |
| 1683 |
if (op2 != 0 || crm != 0) |
| 1684 |
goto bad_reg;
|
| 1685 |
return env->cp15.c0_cssel;
|
| 1686 |
default:
|
| 1687 |
goto bad_reg;
|
| 1688 |
} |
| 1689 |
case 1: /* System configuration. */ |
| 1690 |
if (arm_feature(env, ARM_FEATURE_V7)
|
| 1691 |
&& op1 == 0 && crm == 1 && op2 == 0) { |
| 1692 |
return env->cp15.c1_scr;
|
| 1693 |
} |
| 1694 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1695 |
op2 = 0;
|
| 1696 |
switch (op2) {
|
| 1697 |
case 0: /* Control register. */ |
| 1698 |
return env->cp15.c1_sys;
|
| 1699 |
case 1: /* Auxiliary control register. */ |
| 1700 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
| 1701 |
return env->cp15.c1_xscaleauxcr;
|
| 1702 |
if (!arm_feature(env, ARM_FEATURE_AUXCR))
|
| 1703 |
goto bad_reg;
|
| 1704 |
switch (ARM_CPUID(env)) {
|
| 1705 |
case ARM_CPUID_ARM1026:
|
| 1706 |
return 1; |
| 1707 |
case ARM_CPUID_ARM1136:
|
| 1708 |
case ARM_CPUID_ARM1136_R2:
|
| 1709 |
case ARM_CPUID_ARM1176:
|
| 1710 |
return 7; |
| 1711 |
case ARM_CPUID_ARM11MPCORE:
|
| 1712 |
return 1; |
| 1713 |
case ARM_CPUID_CORTEXA8:
|
| 1714 |
return 2; |
| 1715 |
case ARM_CPUID_CORTEXA9:
|
| 1716 |
case ARM_CPUID_CORTEXA15:
|
| 1717 |
return 0; |
| 1718 |
default:
|
| 1719 |
goto bad_reg;
|
| 1720 |
} |
| 1721 |
case 2: /* Coprocessor access register. */ |
| 1722 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
| 1723 |
goto bad_reg;
|
| 1724 |
return env->cp15.c1_coproc;
|
| 1725 |
default:
|
| 1726 |
goto bad_reg;
|
| 1727 |
} |
| 1728 |
case 2: /* MMU Page table control / MPU cache control. */ |
| 1729 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
| 1730 |
switch (op2) {
|
| 1731 |
case 0: |
| 1732 |
return env->cp15.c2_data;
|
| 1733 |
break;
|
| 1734 |
case 1: |
| 1735 |
return env->cp15.c2_insn;
|
| 1736 |
break;
|
| 1737 |
default:
|
| 1738 |
goto bad_reg;
|
| 1739 |
} |
| 1740 |
} else {
|
| 1741 |
switch (op2) {
|
| 1742 |
case 0: |
| 1743 |
return env->cp15.c2_base0;
|
| 1744 |
case 1: |
| 1745 |
return env->cp15.c2_base1;
|
| 1746 |
case 2: |
| 1747 |
return env->cp15.c2_control;
|
| 1748 |
default:
|
| 1749 |
goto bad_reg;
|
| 1750 |
} |
| 1751 |
} |
| 1752 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
| 1753 |
return env->cp15.c3;
|
| 1754 |
case 4: /* Reserved. */ |
| 1755 |
goto bad_reg;
|
| 1756 |
case 5: /* MMU Fault status / MPU access permission. */ |
| 1757 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1758 |
op2 = 0;
|
| 1759 |
switch (op2) {
|
| 1760 |
case 0: |
| 1761 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
| 1762 |
return simple_mpu_ap_bits(env->cp15.c5_data);
|
| 1763 |
return env->cp15.c5_data;
|
| 1764 |
case 1: |
| 1765 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
| 1766 |
return simple_mpu_ap_bits(env->cp15.c5_insn);
|
| 1767 |
return env->cp15.c5_insn;
|
| 1768 |
case 2: |
| 1769 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
| 1770 |
goto bad_reg;
|
| 1771 |
return env->cp15.c5_data;
|
| 1772 |
case 3: |
| 1773 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
| 1774 |
goto bad_reg;
|
| 1775 |
return env->cp15.c5_insn;
|
| 1776 |
default:
|
| 1777 |
goto bad_reg;
|
| 1778 |
} |
| 1779 |
case 6: /* MMU Fault address. */ |
| 1780 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
| 1781 |
if (crm >= 8) |
| 1782 |
goto bad_reg;
|
| 1783 |
return env->cp15.c6_region[crm];
|
| 1784 |
} else {
|
| 1785 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1786 |
op2 = 0;
|
| 1787 |
switch (op2) {
|
| 1788 |
case 0: |
| 1789 |
return env->cp15.c6_data;
|
| 1790 |
case 1: |
| 1791 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
| 1792 |
/* Watchpoint Fault Adrress. */
|
| 1793 |
return 0; /* Not implemented. */ |
| 1794 |
} else {
|
| 1795 |
/* Instruction Fault Adrress. */
|
| 1796 |
/* Arm9 doesn't have an IFAR, but implementing it anyway
|
| 1797 |
shouldn't do any harm. */
|
| 1798 |
return env->cp15.c6_insn;
|
| 1799 |
} |
| 1800 |
case 2: |
| 1801 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
| 1802 |
/* Instruction Fault Adrress. */
|
| 1803 |
return env->cp15.c6_insn;
|
| 1804 |
} else {
|
| 1805 |
goto bad_reg;
|
| 1806 |
} |
| 1807 |
default:
|
| 1808 |
goto bad_reg;
|
| 1809 |
} |
| 1810 |
} |
| 1811 |
case 7: /* Cache control. */ |
| 1812 |
if (crm == 4 && op1 == 0 && op2 == 0) { |
| 1813 |
return env->cp15.c7_par;
|
| 1814 |
} |
| 1815 |
/* FIXME: Should only clear Z flag if destination is r15. */
|
| 1816 |
env->ZF = 0;
|
| 1817 |
return 0; |
| 1818 |
case 8: /* MMU TLB control. */ |
| 1819 |
goto bad_reg;
|
| 1820 |
case 9: |
| 1821 |
switch (crm) {
|
| 1822 |
case 0: /* Cache lockdown */ |
| 1823 |
switch (op1) {
|
| 1824 |
case 0: /* L1 cache. */ |
| 1825 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
| 1826 |
return 0; |
| 1827 |
} |
| 1828 |
switch (op2) {
|
| 1829 |
case 0: |
| 1830 |
return env->cp15.c9_data;
|
| 1831 |
case 1: |
| 1832 |
return env->cp15.c9_insn;
|
| 1833 |
default:
|
| 1834 |
goto bad_reg;
|
| 1835 |
} |
| 1836 |
case 1: /* L2 cache */ |
| 1837 |
/* L2 Lockdown and Auxiliary control. */
|
| 1838 |
switch (op2) {
|
| 1839 |
case 0: |
| 1840 |
/* L2 cache lockdown (A8 only) */
|
| 1841 |
return 0; |
| 1842 |
case 2: |
| 1843 |
/* L2 cache auxiliary control (A8) or control (A15) */
|
| 1844 |
if (ARM_CPUID(env) == ARM_CPUID_CORTEXA15) {
|
| 1845 |
/* Linux wants the number of processors from here.
|
| 1846 |
* Might as well set the interrupt-controller bit too.
|
| 1847 |
*/
|
| 1848 |
return ((smp_cpus - 1) << 24) | (1 << 23); |
| 1849 |
} |
| 1850 |
return 0; |
| 1851 |
case 3: |
| 1852 |
/* L2 cache extended control (A15) */
|
| 1853 |
return 0; |
| 1854 |
default:
|
| 1855 |
goto bad_reg;
|
| 1856 |
} |
| 1857 |
default:
|
| 1858 |
goto bad_reg;
|
| 1859 |
} |
| 1860 |
break;
|
| 1861 |
case 12: /* Performance monitor control */ |
| 1862 |
if (!arm_feature(env, ARM_FEATURE_V7)) {
|
| 1863 |
goto bad_reg;
|
| 1864 |
} |
| 1865 |
switch (op2) {
|
| 1866 |
case 0: /* performance monitor control register */ |
| 1867 |
return env->cp15.c9_pmcr;
|
| 1868 |
case 1: /* count enable set */ |
| 1869 |
case 2: /* count enable clear */ |
| 1870 |
return env->cp15.c9_pmcnten;
|
| 1871 |
case 3: /* overflow flag status */ |
| 1872 |
return env->cp15.c9_pmovsr;
|
| 1873 |
case 4: /* software increment */ |
| 1874 |
case 5: /* event counter selection register */ |
| 1875 |
return 0; /* Unimplemented, RAZ/WI */ |
| 1876 |
default:
|
| 1877 |
goto bad_reg;
|
| 1878 |
} |
| 1879 |
case 13: /* Performance counters */ |
| 1880 |
if (!arm_feature(env, ARM_FEATURE_V7)) {
|
| 1881 |
goto bad_reg;
|
| 1882 |
} |
| 1883 |
switch (op2) {
|
| 1884 |
case 1: /* Event type select */ |
| 1885 |
return env->cp15.c9_pmxevtyper;
|
| 1886 |
case 0: /* Cycle count register */ |
| 1887 |
case 2: /* Event count register */ |
| 1888 |
/* Unimplemented, so RAZ/WI */
|
| 1889 |
return 0; |
| 1890 |
default:
|
| 1891 |
goto bad_reg;
|
| 1892 |
} |
| 1893 |
case 14: /* Performance monitor control */ |
| 1894 |
if (!arm_feature(env, ARM_FEATURE_V7)) {
|
| 1895 |
goto bad_reg;
|
| 1896 |
} |
| 1897 |
switch (op2) {
|
| 1898 |
case 0: /* user enable */ |
| 1899 |
return env->cp15.c9_pmuserenr;
|
| 1900 |
case 1: /* interrupt enable set */ |
| 1901 |
case 2: /* interrupt enable clear */ |
| 1902 |
return env->cp15.c9_pminten;
|
| 1903 |
default:
|
| 1904 |
goto bad_reg;
|
| 1905 |
} |
| 1906 |
default:
|
| 1907 |
goto bad_reg;
|
| 1908 |
} |
| 1909 |
break;
|
| 1910 |
case 10: /* MMU TLB lockdown. */ |
| 1911 |
/* ??? TLB lockdown not implemented. */
|
| 1912 |
return 0; |
| 1913 |
case 11: /* TCM DMA control. */ |
| 1914 |
case 12: /* Reserved. */ |
| 1915 |
goto bad_reg;
|
| 1916 |
case 13: /* Process ID. */ |
| 1917 |
switch (op2) {
|
| 1918 |
case 0: |
| 1919 |
return env->cp15.c13_fcse;
|
| 1920 |
case 1: |
| 1921 |
return env->cp15.c13_context;
|
| 1922 |
default:
|
| 1923 |
goto bad_reg;
|
| 1924 |
} |
| 1925 |
case 14: /* Generic timer */ |
| 1926 |
if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) {
|
| 1927 |
/* Dummy implementation: RAZ/WI for all */
|
| 1928 |
return 0; |
| 1929 |
} |
| 1930 |
goto bad_reg;
|
| 1931 |
case 15: /* Implementation specific. */ |
| 1932 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 1933 |
if (op2 == 0 && crm == 1) |
| 1934 |
return env->cp15.c15_cpar;
|
| 1935 |
|
| 1936 |
goto bad_reg;
|
| 1937 |
} |
| 1938 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
| 1939 |
switch (crm) {
|
| 1940 |
case 0: |
| 1941 |
return 0; |
| 1942 |
case 1: /* Read TI925T configuration. */ |
| 1943 |
return env->cp15.c15_ticonfig;
|
| 1944 |
case 2: /* Read I_max. */ |
| 1945 |
return env->cp15.c15_i_max;
|
| 1946 |
case 3: /* Read I_min. */ |
| 1947 |
return env->cp15.c15_i_min;
|
| 1948 |
case 4: /* Read thread-ID. */ |
| 1949 |
return env->cp15.c15_threadid;
|
| 1950 |
case 8: /* TI925T_status */ |
| 1951 |
return 0; |
| 1952 |
} |
| 1953 |
/* TODO: Peripheral port remap register:
|
| 1954 |
* On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt
|
| 1955 |
* controller base address at $rn & ~0xfff and map size of
|
| 1956 |
* 0x200 << ($rn & 0xfff), when MMU is off. */
|
| 1957 |
goto bad_reg;
|
| 1958 |
} |
| 1959 |
if (ARM_CPUID(env) == ARM_CPUID_CORTEXA9) {
|
| 1960 |
switch (crm) {
|
| 1961 |
case 0: |
| 1962 |
if ((op1 == 4) && (op2 == 0)) { |
| 1963 |
/* The config_base_address should hold the value of
|
| 1964 |
* the peripheral base. ARM should get this from a CPU
|
| 1965 |
* object property, but that support isn't available in
|
| 1966 |
* December 2011. Default to 0 for now and board models
|
| 1967 |
* that care can set it by a private hook */
|
| 1968 |
return env->cp15.c15_config_base_address;
|
| 1969 |
} else if ((op1 == 0) && (op2 == 0)) { |
| 1970 |
/* power_control should be set to maximum latency. Again,
|
| 1971 |
default to 0 and set by private hook */
|
| 1972 |
return env->cp15.c15_power_control;
|
| 1973 |
} else if ((op1 == 0) && (op2 == 1)) { |
| 1974 |
return env->cp15.c15_diagnostic;
|
| 1975 |
} else if ((op1 == 0) && (op2 == 2)) { |
| 1976 |
return env->cp15.c15_power_diagnostic;
|
| 1977 |
} |
| 1978 |
break;
|
| 1979 |
case 1: /* NEON Busy */ |
| 1980 |
return 0; |
| 1981 |
case 5: /* tlb lockdown */ |
| 1982 |
case 6: |
| 1983 |
case 7: |
| 1984 |
if ((op1 == 5) && (op2 == 2)) { |
| 1985 |
return 0; |
| 1986 |
} |
| 1987 |
break;
|
| 1988 |
default:
|
| 1989 |
break;
|
| 1990 |
} |
| 1991 |
goto bad_reg;
|
| 1992 |
} |
| 1993 |
return 0; |
| 1994 |
} |
| 1995 |
bad_reg:
|
| 1996 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
| 1997 |
cpu_abort(env, "Unimplemented cp15 register read (c%d, c%d, {%d, %d})\n",
|
| 1998 |
(insn >> 16) & 0xf, crm, op1, op2); |
| 1999 |
return 0; |
| 2000 |
} |
| 2001 |
|
| 2002 |
void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
|
| 2003 |
{
|
| 2004 |
if ((env->uncached_cpsr & CPSR_M) == mode) {
|
| 2005 |
env->regs[13] = val;
|
| 2006 |
} else {
|
| 2007 |
env->banked_r13[bank_number(env, mode)] = val; |
| 2008 |
} |
| 2009 |
} |
| 2010 |
|
| 2011 |
uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode) |
| 2012 |
{
|
| 2013 |
if ((env->uncached_cpsr & CPSR_M) == mode) {
|
| 2014 |
return env->regs[13]; |
| 2015 |
} else {
|
| 2016 |
return env->banked_r13[bank_number(env, mode)];
|
| 2017 |
} |
| 2018 |
} |
| 2019 |
|
| 2020 |
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg) |
| 2021 |
{
|
| 2022 |
switch (reg) {
|
| 2023 |
case 0: /* APSR */ |
| 2024 |
return xpsr_read(env) & 0xf8000000; |
| 2025 |
case 1: /* IAPSR */ |
| 2026 |
return xpsr_read(env) & 0xf80001ff; |
| 2027 |
case 2: /* EAPSR */ |
| 2028 |
return xpsr_read(env) & 0xff00fc00; |
| 2029 |
case 3: /* xPSR */ |
| 2030 |
return xpsr_read(env) & 0xff00fdff; |
| 2031 |
case 5: /* IPSR */ |
| 2032 |
return xpsr_read(env) & 0x000001ff; |
| 2033 |
case 6: /* EPSR */ |
| 2034 |
return xpsr_read(env) & 0x0700fc00; |
| 2035 |
case 7: /* IEPSR */ |
| 2036 |
return xpsr_read(env) & 0x0700edff; |
| 2037 |
case 8: /* MSP */ |
| 2038 |
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13]; |
| 2039 |
case 9: /* PSP */ |
| 2040 |
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp; |
| 2041 |
case 16: /* PRIMASK */ |
| 2042 |
return (env->uncached_cpsr & CPSR_I) != 0; |
| 2043 |
case 17: /* BASEPRI */ |
| 2044 |
case 18: /* BASEPRI_MAX */ |
| 2045 |
return env->v7m.basepri;
|
| 2046 |
case 19: /* FAULTMASK */ |
| 2047 |
return (env->uncached_cpsr & CPSR_F) != 0; |
| 2048 |
case 20: /* CONTROL */ |
| 2049 |
return env->v7m.control;
|
| 2050 |
default:
|
| 2051 |
/* ??? For debugging only. */
|
| 2052 |
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
|
| 2053 |
return 0; |
| 2054 |
} |
| 2055 |
} |
| 2056 |
|
| 2057 |
void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
|
| 2058 |
{
|
| 2059 |
switch (reg) {
|
| 2060 |
case 0: /* APSR */ |
| 2061 |
xpsr_write(env, val, 0xf8000000);
|
| 2062 |
break;
|
| 2063 |
case 1: /* IAPSR */ |
| 2064 |
xpsr_write(env, val, 0xf8000000);
|
| 2065 |
break;
|
| 2066 |
case 2: /* EAPSR */ |
| 2067 |
xpsr_write(env, val, 0xfe00fc00);
|
| 2068 |
break;
|
| 2069 |
case 3: /* xPSR */ |
| 2070 |
xpsr_write(env, val, 0xfe00fc00);
|
| 2071 |
break;
|
| 2072 |
case 5: /* IPSR */ |
| 2073 |
/* IPSR bits are readonly. */
|
| 2074 |
break;
|
| 2075 |
case 6: /* EPSR */ |
| 2076 |
xpsr_write(env, val, 0x0600fc00);
|
| 2077 |
break;
|
| 2078 |
case 7: /* IEPSR */ |
| 2079 |
xpsr_write(env, val, 0x0600fc00);
|
| 2080 |
break;
|
| 2081 |
case 8: /* MSP */ |
| 2082 |
if (env->v7m.current_sp)
|
| 2083 |
env->v7m.other_sp = val; |
| 2084 |
else
|
| 2085 |
env->regs[13] = val;
|
| 2086 |
break;
|
| 2087 |
case 9: /* PSP */ |
| 2088 |
if (env->v7m.current_sp)
|
| 2089 |
env->regs[13] = val;
|
| 2090 |
else
|
| 2091 |
env->v7m.other_sp = val; |
| 2092 |
break;
|
| 2093 |
case 16: /* PRIMASK */ |
| 2094 |
if (val & 1) |
| 2095 |
env->uncached_cpsr |= CPSR_I; |
| 2096 |
else
|
| 2097 |
env->uncached_cpsr &= ~CPSR_I; |
| 2098 |
break;
|
| 2099 |
case 17: /* BASEPRI */ |
| 2100 |
env->v7m.basepri = val & 0xff;
|
| 2101 |
break;
|
| 2102 |
case 18: /* BASEPRI_MAX */ |
| 2103 |
val &= 0xff;
|
| 2104 |
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0)) |
| 2105 |
env->v7m.basepri = val; |
| 2106 |
break;
|
| 2107 |
case 19: /* FAULTMASK */ |
| 2108 |
if (val & 1) |
| 2109 |
env->uncached_cpsr |= CPSR_F; |
| 2110 |
else
|
| 2111 |
env->uncached_cpsr &= ~CPSR_F; |
| 2112 |
break;
|
| 2113 |
case 20: /* CONTROL */ |
| 2114 |
env->v7m.control = val & 3;
|
| 2115 |
switch_v7m_sp(env, (val & 2) != 0); |
| 2116 |
break;
|
| 2117 |
default:
|
| 2118 |
/* ??? For debugging only. */
|
| 2119 |
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
|
| 2120 |
return;
|
| 2121 |
} |
| 2122 |
} |
| 2123 |
|
| 2124 |
#endif
|
| 2125 |
|
| 2126 |
/* Note that signed overflow is undefined in C. The following routines are
|
| 2127 |
careful to use unsigned types where modulo arithmetic is required.
|
| 2128 |
Failure to do so _will_ break on newer gcc. */
|
| 2129 |
|
| 2130 |
/* Signed saturating arithmetic. */
|
| 2131 |
|
| 2132 |
/* Perform 16-bit signed saturating addition. */
|
| 2133 |
static inline uint16_t add16_sat(uint16_t a, uint16_t b) |
| 2134 |
{
|
| 2135 |
uint16_t res; |
| 2136 |
|
| 2137 |
res = a + b; |
| 2138 |
if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) { |
| 2139 |
if (a & 0x8000) |
| 2140 |
res = 0x8000;
|
| 2141 |
else
|
| 2142 |
res = 0x7fff;
|
| 2143 |
} |
| 2144 |
return res;
|
| 2145 |
} |
| 2146 |
|
| 2147 |
/* Perform 8-bit signed saturating addition. */
|
| 2148 |
static inline uint8_t add8_sat(uint8_t a, uint8_t b) |
| 2149 |
{
|
| 2150 |
uint8_t res; |
| 2151 |
|
| 2152 |
res = a + b; |
| 2153 |
if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) { |
| 2154 |
if (a & 0x80) |
| 2155 |
res = 0x80;
|
| 2156 |
else
|
| 2157 |
res = 0x7f;
|
| 2158 |
} |
| 2159 |
return res;
|
| 2160 |
} |
| 2161 |
|
| 2162 |
/* Perform 16-bit signed saturating subtraction. */
|
| 2163 |
static inline uint16_t sub16_sat(uint16_t a, uint16_t b) |
| 2164 |
{
|
| 2165 |
uint16_t res; |
| 2166 |
|
| 2167 |
res = a - b; |
| 2168 |
if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) { |
| 2169 |
if (a & 0x8000) |
| 2170 |
res = 0x8000;
|
| 2171 |
else
|
| 2172 |
res = 0x7fff;
|
| 2173 |
} |
| 2174 |
return res;
|
| 2175 |
} |
| 2176 |
|
| 2177 |
/* Perform 8-bit signed saturating subtraction. */
|
| 2178 |
static inline uint8_t sub8_sat(uint8_t a, uint8_t b) |
| 2179 |
{
|
| 2180 |
uint8_t res; |
| 2181 |
|
| 2182 |
res = a - b; |
| 2183 |
if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) { |
| 2184 |
if (a & 0x80) |
| 2185 |
res = 0x80;
|
| 2186 |
else
|
| 2187 |
res = 0x7f;
|
| 2188 |
} |
| 2189 |
return res;
|
| 2190 |
} |
| 2191 |
|
| 2192 |
#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16); |
| 2193 |
#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16); |
| 2194 |
#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8); |
| 2195 |
#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8); |
| 2196 |
#define PFX q
|
| 2197 |
|
| 2198 |
#include "op_addsub.h" |
| 2199 |
|
| 2200 |
/* Unsigned saturating arithmetic. */
|
| 2201 |
static inline uint16_t add16_usat(uint16_t a, uint16_t b) |
| 2202 |
{
|
| 2203 |
uint16_t res; |
| 2204 |
res = a + b; |
| 2205 |
if (res < a)
|
| 2206 |
res = 0xffff;
|
| 2207 |
return res;
|
| 2208 |
} |
| 2209 |
|
| 2210 |
static inline uint16_t sub16_usat(uint16_t a, uint16_t b) |
| 2211 |
{
|
| 2212 |
if (a > b)
|
| 2213 |
return a - b;
|
| 2214 |
else
|
| 2215 |
return 0; |
| 2216 |
} |
| 2217 |
|
| 2218 |
static inline uint8_t add8_usat(uint8_t a, uint8_t b) |
| 2219 |
{
|
| 2220 |
uint8_t res; |
| 2221 |
res = a + b; |
| 2222 |
if (res < a)
|
| 2223 |
res = 0xff;
|
| 2224 |
return res;
|
| 2225 |
} |
| 2226 |
|
| 2227 |
static inline uint8_t sub8_usat(uint8_t a, uint8_t b) |
| 2228 |
{
|
| 2229 |
if (a > b)
|
| 2230 |
return a - b;
|
| 2231 |
else
|
| 2232 |
return 0; |
| 2233 |
} |
| 2234 |
|
| 2235 |
#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16); |
| 2236 |
#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16); |
| 2237 |
#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8); |
| 2238 |
#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8); |
| 2239 |
#define PFX uq
|
| 2240 |
|
| 2241 |
#include "op_addsub.h" |
| 2242 |
|
| 2243 |
/* Signed modulo arithmetic. */
|
| 2244 |
#define SARITH16(a, b, n, op) do { \ |
| 2245 |
int32_t sum; \ |
| 2246 |
sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \ |
| 2247 |
RESULT(sum, n, 16); \
|
| 2248 |
if (sum >= 0) \ |
| 2249 |
ge |= 3 << (n * 2); \ |
| 2250 |
} while(0) |
| 2251 |
|
| 2252 |
#define SARITH8(a, b, n, op) do { \ |
| 2253 |
int32_t sum; \ |
| 2254 |
sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \ |
| 2255 |
RESULT(sum, n, 8); \
|
| 2256 |
if (sum >= 0) \ |
| 2257 |
ge |= 1 << n; \
|
| 2258 |
} while(0) |
| 2259 |
|
| 2260 |
|
| 2261 |
#define ADD16(a, b, n) SARITH16(a, b, n, +)
|
| 2262 |
#define SUB16(a, b, n) SARITH16(a, b, n, -)
|
| 2263 |
#define ADD8(a, b, n) SARITH8(a, b, n, +)
|
| 2264 |
#define SUB8(a, b, n) SARITH8(a, b, n, -)
|
| 2265 |
#define PFX s
|
| 2266 |
#define ARITH_GE
|
| 2267 |
|
| 2268 |
#include "op_addsub.h" |
| 2269 |
|
| 2270 |
/* Unsigned modulo arithmetic. */
|
| 2271 |
#define ADD16(a, b, n) do { \ |
| 2272 |
uint32_t sum; \ |
| 2273 |
sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \ |
| 2274 |
RESULT(sum, n, 16); \
|
| 2275 |
if ((sum >> 16) == 1) \ |
| 2276 |
ge |= 3 << (n * 2); \ |
| 2277 |
} while(0) |
| 2278 |
|
| 2279 |
#define ADD8(a, b, n) do { \ |
| 2280 |
uint32_t sum; \ |
| 2281 |
sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \ |
| 2282 |
RESULT(sum, n, 8); \
|
| 2283 |
if ((sum >> 8) == 1) \ |
| 2284 |
ge |= 1 << n; \
|
| 2285 |
} while(0) |
| 2286 |
|
| 2287 |
#define SUB16(a, b, n) do { \ |
| 2288 |
uint32_t sum; \ |
| 2289 |
sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \ |
| 2290 |
RESULT(sum, n, 16); \
|
| 2291 |
if ((sum >> 16) == 0) \ |
| 2292 |
ge |= 3 << (n * 2); \ |
| 2293 |
} while(0) |
| 2294 |
|
| 2295 |
#define SUB8(a, b, n) do { \ |
| 2296 |
uint32_t sum; \ |
| 2297 |
sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \ |
| 2298 |
RESULT(sum, n, 8); \
|
| 2299 |
if ((sum >> 8) == 0) \ |
| 2300 |
ge |= 1 << n; \
|
| 2301 |
} while(0) |
| 2302 |
|
| 2303 |
#define PFX u
|
| 2304 |
#define ARITH_GE
|
| 2305 |
|
| 2306 |
#include "op_addsub.h" |
| 2307 |
|
| 2308 |
/* Halved signed arithmetic. */
|
| 2309 |
#define ADD16(a, b, n) \
|
| 2310 |
RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16) |
| 2311 |
#define SUB16(a, b, n) \
|
| 2312 |
RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16) |
| 2313 |
#define ADD8(a, b, n) \
|
| 2314 |
RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8) |
| 2315 |
#define SUB8(a, b, n) \
|
| 2316 |
RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8) |
| 2317 |
#define PFX sh
|
| 2318 |
|
| 2319 |
#include "op_addsub.h" |
| 2320 |
|
| 2321 |
/* Halved unsigned arithmetic. */
|
| 2322 |
#define ADD16(a, b, n) \
|
| 2323 |
RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
| 2324 |
#define SUB16(a, b, n) \
|
| 2325 |
RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
| 2326 |
#define ADD8(a, b, n) \
|
| 2327 |
RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
| 2328 |
#define SUB8(a, b, n) \
|
| 2329 |
RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
| 2330 |
#define PFX uh
|
| 2331 |
|
| 2332 |
#include "op_addsub.h" |
| 2333 |
|
| 2334 |
static inline uint8_t do_usad(uint8_t a, uint8_t b) |
| 2335 |
{
|
| 2336 |
if (a > b)
|
| 2337 |
return a - b;
|
| 2338 |
else
|
| 2339 |
return b - a;
|
| 2340 |
} |
| 2341 |
|
| 2342 |
/* Unsigned sum of absolute byte differences. */
|
| 2343 |
uint32_t HELPER(usad8)(uint32_t a, uint32_t b) |
| 2344 |
{
|
| 2345 |
uint32_t sum; |
| 2346 |
sum = do_usad(a, b); |
| 2347 |
sum += do_usad(a >> 8, b >> 8); |
| 2348 |
sum += do_usad(a >> 16, b >>16); |
| 2349 |
sum += do_usad(a >> 24, b >> 24); |
| 2350 |
return sum;
|
| 2351 |
} |
| 2352 |
|
| 2353 |
/* For ARMv6 SEL instruction. */
|
| 2354 |
uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b) |
| 2355 |
{
|
| 2356 |
uint32_t mask; |
| 2357 |
|
| 2358 |
mask = 0;
|
| 2359 |
if (flags & 1) |
| 2360 |
mask |= 0xff;
|
| 2361 |
if (flags & 2) |
| 2362 |
mask |= 0xff00;
|
| 2363 |
if (flags & 4) |
| 2364 |
mask |= 0xff0000;
|
| 2365 |
if (flags & 8) |
| 2366 |
mask |= 0xff000000;
|
| 2367 |
return (a & mask) | (b & ~mask);
|
| 2368 |
} |
| 2369 |
|
| 2370 |
uint32_t HELPER(logicq_cc)(uint64_t val) |
| 2371 |
{
|
| 2372 |
return (val >> 32) | (val != 0); |
| 2373 |
} |
| 2374 |
|
| 2375 |
/* VFP support. We follow the convention used for VFP instrunctions:
|
| 2376 |
Single precition routines have a "s" suffix, double precision a
|
| 2377 |
"d" suffix. */
|
| 2378 |
|
| 2379 |
/* Convert host exception flags to vfp form. */
|
| 2380 |
static inline int vfp_exceptbits_from_host(int host_bits) |
| 2381 |
{
|
| 2382 |
int target_bits = 0; |
| 2383 |
|
| 2384 |
if (host_bits & float_flag_invalid)
|
| 2385 |
target_bits |= 1;
|
| 2386 |
if (host_bits & float_flag_divbyzero)
|
| 2387 |
target_bits |= 2;
|
| 2388 |
if (host_bits & float_flag_overflow)
|
| 2389 |
target_bits |= 4;
|
| 2390 |
if (host_bits & (float_flag_underflow | float_flag_output_denormal))
|
| 2391 |
target_bits |= 8;
|
| 2392 |
if (host_bits & float_flag_inexact)
|
| 2393 |
target_bits |= 0x10;
|
| 2394 |
if (host_bits & float_flag_input_denormal)
|
| 2395 |
target_bits |= 0x80;
|
| 2396 |
return target_bits;
|
| 2397 |
} |
| 2398 |
|
| 2399 |
uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env) |
| 2400 |
{
|
| 2401 |
int i;
|
| 2402 |
uint32_t fpscr; |
| 2403 |
|
| 2404 |
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
|
| 2405 |
| (env->vfp.vec_len << 16)
|
| 2406 |
| (env->vfp.vec_stride << 20);
|
| 2407 |
i = get_float_exception_flags(&env->vfp.fp_status); |
| 2408 |
i |= get_float_exception_flags(&env->vfp.standard_fp_status); |
| 2409 |
fpscr |= vfp_exceptbits_from_host(i); |
| 2410 |
return fpscr;
|
| 2411 |
} |
| 2412 |
|
| 2413 |
uint32_t vfp_get_fpscr(CPUARMState *env) |
| 2414 |
{
|
| 2415 |
return HELPER(vfp_get_fpscr)(env);
|
| 2416 |
} |
| 2417 |
|
| 2418 |
/* Convert vfp exception flags to target form. */
|
| 2419 |
static inline int vfp_exceptbits_to_host(int target_bits) |
| 2420 |
{
|
| 2421 |
int host_bits = 0; |
| 2422 |
|
| 2423 |
if (target_bits & 1) |
| 2424 |
host_bits |= float_flag_invalid; |
| 2425 |
if (target_bits & 2) |
| 2426 |
host_bits |= float_flag_divbyzero; |
| 2427 |
if (target_bits & 4) |
| 2428 |
host_bits |= float_flag_overflow; |
| 2429 |
if (target_bits & 8) |
| 2430 |
host_bits |= float_flag_underflow; |
| 2431 |
if (target_bits & 0x10) |
| 2432 |
host_bits |= float_flag_inexact; |
| 2433 |
if (target_bits & 0x80) |
| 2434 |
host_bits |= float_flag_input_denormal; |
| 2435 |
return host_bits;
|
| 2436 |
} |
| 2437 |
|
| 2438 |
void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
|
| 2439 |
{
|
| 2440 |
int i;
|
| 2441 |
uint32_t changed; |
| 2442 |
|
| 2443 |
changed = env->vfp.xregs[ARM_VFP_FPSCR]; |
| 2444 |
env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
|
| 2445 |
env->vfp.vec_len = (val >> 16) & 7; |
| 2446 |
env->vfp.vec_stride = (val >> 20) & 3; |
| 2447 |
|
| 2448 |
changed ^= val; |
| 2449 |
if (changed & (3 << 22)) { |
| 2450 |
i = (val >> 22) & 3; |
| 2451 |
switch (i) {
|
| 2452 |
case 0: |
| 2453 |
i = float_round_nearest_even; |
| 2454 |
break;
|
| 2455 |
case 1: |
| 2456 |
i = float_round_up; |
| 2457 |
break;
|
| 2458 |
case 2: |
| 2459 |
i = float_round_down; |
| 2460 |
break;
|
| 2461 |
case 3: |
| 2462 |
i = float_round_to_zero; |
| 2463 |
break;
|
| 2464 |
} |
| 2465 |
set_float_rounding_mode(i, &env->vfp.fp_status); |
| 2466 |
} |
| 2467 |
if (changed & (1 << 24)) { |
| 2468 |
set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); |
| 2469 |
set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); |
| 2470 |
} |
| 2471 |
if (changed & (1 << 25)) |
| 2472 |
set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status); |
| 2473 |
|
| 2474 |
i = vfp_exceptbits_to_host(val); |
| 2475 |
set_float_exception_flags(i, &env->vfp.fp_status); |
| 2476 |
set_float_exception_flags(0, &env->vfp.standard_fp_status);
|
| 2477 |
} |
| 2478 |
|
| 2479 |
void vfp_set_fpscr(CPUARMState *env, uint32_t val)
|
| 2480 |
{
|
| 2481 |
HELPER(vfp_set_fpscr)(env, val); |
| 2482 |
} |
| 2483 |
|
| 2484 |
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
|
| 2485 |
|
| 2486 |
#define VFP_BINOP(name) \
|
| 2487 |
float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \
|
| 2488 |
{ \
|
| 2489 |
float_status *fpst = fpstp; \ |
| 2490 |
return float32_ ## name(a, b, fpst); \ |
| 2491 |
} \ |
| 2492 |
float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \
|
| 2493 |
{ \
|
| 2494 |
float_status *fpst = fpstp; \ |
| 2495 |
return float64_ ## name(a, b, fpst); \ |
| 2496 |
} |
| 2497 |
VFP_BINOP(add) |
| 2498 |
VFP_BINOP(sub) |
| 2499 |
VFP_BINOP(mul) |
| 2500 |
VFP_BINOP(div) |
| 2501 |
#undef VFP_BINOP
|
| 2502 |
|
| 2503 |
float32 VFP_HELPER(neg, s)(float32 a) |
| 2504 |
{
|
| 2505 |
return float32_chs(a);
|
| 2506 |
} |
| 2507 |
|
| 2508 |
float64 VFP_HELPER(neg, d)(float64 a) |
| 2509 |
{
|
| 2510 |
return float64_chs(a);
|
| 2511 |
} |
| 2512 |
|
| 2513 |
float32 VFP_HELPER(abs, s)(float32 a) |
| 2514 |
{
|
| 2515 |
return float32_abs(a);
|
| 2516 |
} |
| 2517 |
|
| 2518 |
float64 VFP_HELPER(abs, d)(float64 a) |
| 2519 |
{
|
| 2520 |
return float64_abs(a);
|
| 2521 |
} |
| 2522 |
|
| 2523 |
float32 VFP_HELPER(sqrt, s)(float32 a, CPUARMState *env) |
| 2524 |
{
|
| 2525 |
return float32_sqrt(a, &env->vfp.fp_status);
|
| 2526 |
} |
| 2527 |
|
| 2528 |
float64 VFP_HELPER(sqrt, d)(float64 a, CPUARMState *env) |
| 2529 |
{
|
| 2530 |
return float64_sqrt(a, &env->vfp.fp_status);
|
| 2531 |
} |
| 2532 |
|
| 2533 |
/* XXX: check quiet/signaling case */
|
| 2534 |
#define DO_VFP_cmp(p, type) \
|
| 2535 |
void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env) \
|
| 2536 |
{ \
|
| 2537 |
uint32_t flags; \ |
| 2538 |
switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \ |
| 2539 |
case 0: flags = 0x6; break; \ |
| 2540 |
case -1: flags = 0x8; break; \ |
| 2541 |
case 1: flags = 0x2; break; \ |
| 2542 |
default: case 2: flags = 0x3; break; \ |
| 2543 |
} \ |
| 2544 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
| 2545 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
| 2546 |
} \ |
| 2547 |
void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \
|
| 2548 |
{ \
|
| 2549 |
uint32_t flags; \ |
| 2550 |
switch(type ## _compare(a, b, &env->vfp.fp_status)) { \ |
| 2551 |
case 0: flags = 0x6; break; \ |
| 2552 |
case -1: flags = 0x8; break; \ |
| 2553 |
case 1: flags = 0x2; break; \ |
| 2554 |
default: case 2: flags = 0x3; break; \ |
| 2555 |
} \ |
| 2556 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
| 2557 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
| 2558 |
} |
| 2559 |
DO_VFP_cmp(s, float32) |
| 2560 |
DO_VFP_cmp(d, float64) |
| 2561 |
#undef DO_VFP_cmp
|
| 2562 |
|
| 2563 |
/* Integer to float and float to integer conversions */
|
| 2564 |
|
| 2565 |
#define CONV_ITOF(name, fsz, sign) \
|
| 2566 |
float##fsz HELPER(name)(uint32_t x, void *fpstp) \ |
| 2567 |
{ \
|
| 2568 |
float_status *fpst = fpstp; \ |
| 2569 |
return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \ |
| 2570 |
} |
| 2571 |
|
| 2572 |
#define CONV_FTOI(name, fsz, sign, round) \
|
| 2573 |
uint32_t HELPER(name)(float##fsz x, void *fpstp) \ |
| 2574 |
{ \
|
| 2575 |
float_status *fpst = fpstp; \ |
| 2576 |
if (float##fsz##_is_any_nan(x)) { \ |
| 2577 |
float_raise(float_flag_invalid, fpst); \ |
| 2578 |
return 0; \ |
| 2579 |
} \ |
| 2580 |
return float##fsz##_to_##sign##int32##round(x, fpst); \ |
| 2581 |
} |
| 2582 |
|
| 2583 |
#define FLOAT_CONVS(name, p, fsz, sign) \
|
| 2584 |
CONV_ITOF(vfp_##name##to##p, fsz, sign) \ |
| 2585 |
CONV_FTOI(vfp_to##name##p, fsz, sign, ) \ |
| 2586 |
CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero) |
| 2587 |
|
| 2588 |
FLOAT_CONVS(si, s, 32, )
|
| 2589 |
FLOAT_CONVS(si, d, 64, )
|
| 2590 |
FLOAT_CONVS(ui, s, 32, u)
|
| 2591 |
FLOAT_CONVS(ui, d, 64, u)
|
| 2592 |
|
| 2593 |
#undef CONV_ITOF
|
| 2594 |
#undef CONV_FTOI
|
| 2595 |
#undef FLOAT_CONVS
|
| 2596 |
|
| 2597 |
/* floating point conversion */
|
| 2598 |
float64 VFP_HELPER(fcvtd, s)(float32 x, CPUARMState *env) |
| 2599 |
{
|
| 2600 |
float64 r = float32_to_float64(x, &env->vfp.fp_status); |
| 2601 |
/* ARM requires that S<->D conversion of any kind of NaN generates
|
| 2602 |
* a quiet NaN by forcing the most significant frac bit to 1.
|
| 2603 |
*/
|
| 2604 |
return float64_maybe_silence_nan(r);
|
| 2605 |
} |
| 2606 |
|
| 2607 |
float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env) |
| 2608 |
{
|
| 2609 |
float32 r = float64_to_float32(x, &env->vfp.fp_status); |
| 2610 |
/* ARM requires that S<->D conversion of any kind of NaN generates
|
| 2611 |
* a quiet NaN by forcing the most significant frac bit to 1.
|
| 2612 |
*/
|
| 2613 |
return float32_maybe_silence_nan(r);
|
| 2614 |
} |
| 2615 |
|
| 2616 |
/* VFP3 fixed point conversion. */
|
| 2617 |
#define VFP_CONV_FIX(name, p, fsz, itype, sign) \
|
| 2618 |
float##fsz HELPER(vfp_##name##to##p)(uint##fsz##_t x, uint32_t shift, \ |
| 2619 |
void *fpstp) \
|
| 2620 |
{ \
|
| 2621 |
float_status *fpst = fpstp; \ |
| 2622 |
float##fsz tmp; \ |
| 2623 |
tmp = sign##int32_to_##float##fsz((itype##_t)x, fpst); \ |
| 2624 |
return float##fsz##_scalbn(tmp, -(int)shift, fpst); \ |
| 2625 |
} \ |
| 2626 |
uint##fsz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \ |
| 2627 |
void *fpstp) \
|
| 2628 |
{ \
|
| 2629 |
float_status *fpst = fpstp; \ |
| 2630 |
float##fsz tmp; \ |
| 2631 |
if (float##fsz##_is_any_nan(x)) { \ |
| 2632 |
float_raise(float_flag_invalid, fpst); \ |
| 2633 |
return 0; \ |
| 2634 |
} \ |
| 2635 |
tmp = float##fsz##_scalbn(x, shift, fpst); \ |
| 2636 |
return float##fsz##_to_##itype##_round_to_zero(tmp, fpst); \ |
| 2637 |
} |
| 2638 |
|
| 2639 |
VFP_CONV_FIX(sh, d, 64, int16, )
|
| 2640 |
VFP_CONV_FIX(sl, d, 64, int32, )
|
| 2641 |
VFP_CONV_FIX(uh, d, 64, uint16, u)
|
| 2642 |
VFP_CONV_FIX(ul, d, 64, uint32, u)
|
| 2643 |
VFP_CONV_FIX(sh, s, 32, int16, )
|
| 2644 |
VFP_CONV_FIX(sl, s, 32, int32, )
|
| 2645 |
VFP_CONV_FIX(uh, s, 32, uint16, u)
|
| 2646 |
VFP_CONV_FIX(ul, s, 32, uint32, u)
|
| 2647 |
#undef VFP_CONV_FIX
|
| 2648 |
|
| 2649 |
/* Half precision conversions. */
|
| 2650 |
static float32 do_fcvt_f16_to_f32(uint32_t a, CPUARMState *env, float_status *s)
|
| 2651 |
{
|
| 2652 |
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; |
| 2653 |
float32 r = float16_to_float32(make_float16(a), ieee, s); |
| 2654 |
if (ieee) {
|
| 2655 |
return float32_maybe_silence_nan(r);
|
| 2656 |
} |
| 2657 |
return r;
|
| 2658 |
} |
| 2659 |
|
| 2660 |
static uint32_t do_fcvt_f32_to_f16(float32 a, CPUARMState *env, float_status *s)
|
| 2661 |
{
|
| 2662 |
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; |
| 2663 |
float16 r = float32_to_float16(a, ieee, s); |
| 2664 |
if (ieee) {
|
| 2665 |
r = float16_maybe_silence_nan(r); |
| 2666 |
} |
| 2667 |
return float16_val(r);
|
| 2668 |
} |
| 2669 |
|
| 2670 |
float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env) |
| 2671 |
{
|
| 2672 |
return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status);
|
| 2673 |
} |
| 2674 |
|
| 2675 |
uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUARMState *env) |
| 2676 |
{
|
| 2677 |
return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status);
|
| 2678 |
} |
| 2679 |
|
| 2680 |
float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env) |
| 2681 |
{
|
| 2682 |
return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status);
|
| 2683 |
} |
| 2684 |
|
| 2685 |
uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUARMState *env) |
| 2686 |
{
|
| 2687 |
return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status);
|
| 2688 |
} |
| 2689 |
|
| 2690 |
#define float32_two make_float32(0x40000000) |
| 2691 |
#define float32_three make_float32(0x40400000) |
| 2692 |
#define float32_one_point_five make_float32(0x3fc00000) |
| 2693 |
|
| 2694 |
float32 HELPER(recps_f32)(float32 a, float32 b, CPUARMState *env) |
| 2695 |
{
|
| 2696 |
float_status *s = &env->vfp.standard_fp_status; |
| 2697 |
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
|
| 2698 |
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
|
| 2699 |
if (!(float32_is_zero(a) || float32_is_zero(b))) {
|
| 2700 |
float_raise(float_flag_input_denormal, s); |
| 2701 |
} |
| 2702 |
return float32_two;
|
| 2703 |
} |
| 2704 |
return float32_sub(float32_two, float32_mul(a, b, s), s);
|
| 2705 |
} |
| 2706 |
|
| 2707 |
float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUARMState *env) |
| 2708 |
{
|
| 2709 |
float_status *s = &env->vfp.standard_fp_status; |
| 2710 |
float32 product; |
| 2711 |
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
|
| 2712 |
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
|
| 2713 |
if (!(float32_is_zero(a) || float32_is_zero(b))) {
|
| 2714 |
float_raise(float_flag_input_denormal, s); |
| 2715 |
} |
| 2716 |
return float32_one_point_five;
|
| 2717 |
} |
| 2718 |
product = float32_mul(a, b, s); |
| 2719 |
return float32_div(float32_sub(float32_three, product, s), float32_two, s);
|
| 2720 |
} |
| 2721 |
|
| 2722 |
/* NEON helpers. */
|
| 2723 |
|
| 2724 |
/* Constants 256 and 512 are used in some helpers; we avoid relying on
|
| 2725 |
* int->float conversions at run-time. */
|
| 2726 |
#define float64_256 make_float64(0x4070000000000000LL) |
| 2727 |
#define float64_512 make_float64(0x4080000000000000LL) |
| 2728 |
|
| 2729 |
/* The algorithm that must be used to calculate the estimate
|
| 2730 |
* is specified by the ARM ARM.
|
| 2731 |
*/
|
| 2732 |
static float64 recip_estimate(float64 a, CPUARMState *env)
|
| 2733 |
{
|
| 2734 |
/* These calculations mustn't set any fp exception flags,
|
| 2735 |
* so we use a local copy of the fp_status.
|
| 2736 |
*/
|
| 2737 |
float_status dummy_status = env->vfp.standard_fp_status; |
| 2738 |
float_status *s = &dummy_status; |
| 2739 |
/* q = (int)(a * 512.0) */
|
| 2740 |
float64 q = float64_mul(float64_512, a, s); |
| 2741 |
int64_t q_int = float64_to_int64_round_to_zero(q, s); |
| 2742 |
|
| 2743 |
/* r = 1.0 / (((double)q + 0.5) / 512.0) */
|
| 2744 |
q = int64_to_float64(q_int, s); |
| 2745 |
q = float64_add(q, float64_half, s); |
| 2746 |
q = float64_div(q, float64_512, s); |
| 2747 |
q = float64_div(float64_one, q, s); |
| 2748 |
|
| 2749 |
/* s = (int)(256.0 * r + 0.5) */
|
| 2750 |
q = float64_mul(q, float64_256, s); |
| 2751 |
q = float64_add(q, float64_half, s); |
| 2752 |
q_int = float64_to_int64_round_to_zero(q, s); |
| 2753 |
|
| 2754 |
/* return (double)s / 256.0 */
|
| 2755 |
return float64_div(int64_to_float64(q_int, s), float64_256, s);
|
| 2756 |
} |
| 2757 |
|
| 2758 |
float32 HELPER(recpe_f32)(float32 a, CPUARMState *env) |
| 2759 |
{
|
| 2760 |
float_status *s = &env->vfp.standard_fp_status; |
| 2761 |
float64 f64; |
| 2762 |
uint32_t val32 = float32_val(a); |
| 2763 |
|
| 2764 |
int result_exp;
|
| 2765 |
int a_exp = (val32 & 0x7f800000) >> 23; |
| 2766 |
int sign = val32 & 0x80000000; |
| 2767 |
|
| 2768 |
if (float32_is_any_nan(a)) {
|
| 2769 |
if (float32_is_signaling_nan(a)) {
|
| 2770 |
float_raise(float_flag_invalid, s); |
| 2771 |
} |
| 2772 |
return float32_default_nan;
|
| 2773 |
} else if (float32_is_infinity(a)) { |
| 2774 |
return float32_set_sign(float32_zero, float32_is_neg(a));
|
| 2775 |
} else if (float32_is_zero_or_denormal(a)) { |
| 2776 |
if (!float32_is_zero(a)) {
|
| 2777 |
float_raise(float_flag_input_denormal, s); |
| 2778 |
} |
| 2779 |
float_raise(float_flag_divbyzero, s); |
| 2780 |
return float32_set_sign(float32_infinity, float32_is_neg(a));
|
| 2781 |
} else if (a_exp >= 253) { |
| 2782 |
float_raise(float_flag_underflow, s); |
| 2783 |
return float32_set_sign(float32_zero, float32_is_neg(a));
|
| 2784 |
} |
| 2785 |
|
| 2786 |
f64 = make_float64((0x3feULL << 52) |
| 2787 |
| ((int64_t)(val32 & 0x7fffff) << 29)); |
| 2788 |
|
| 2789 |
result_exp = 253 - a_exp;
|
| 2790 |
|
| 2791 |
f64 = recip_estimate(f64, env); |
| 2792 |
|
| 2793 |
val32 = sign |
| 2794 |
| ((result_exp & 0xff) << 23) |
| 2795 |
| ((float64_val(f64) >> 29) & 0x7fffff); |
| 2796 |
return make_float32(val32);
|
| 2797 |
} |
| 2798 |
|
| 2799 |
/* The algorithm that must be used to calculate the estimate
|
| 2800 |
* is specified by the ARM ARM.
|
| 2801 |
*/
|
| 2802 |
static float64 recip_sqrt_estimate(float64 a, CPUARMState *env)
|
| 2803 |
{
|
| 2804 |
/* These calculations mustn't set any fp exception flags,
|
| 2805 |
* so we use a local copy of the fp_status.
|
| 2806 |
*/
|
| 2807 |
float_status dummy_status = env->vfp.standard_fp_status; |
| 2808 |
float_status *s = &dummy_status; |
| 2809 |
float64 q; |
| 2810 |
int64_t q_int; |
| 2811 |
|
| 2812 |
if (float64_lt(a, float64_half, s)) {
|
| 2813 |
/* range 0.25 <= a < 0.5 */
|
| 2814 |
|
| 2815 |
/* a in units of 1/512 rounded down */
|
| 2816 |
/* q0 = (int)(a * 512.0); */
|
| 2817 |
q = float64_mul(float64_512, a, s); |
| 2818 |
q_int = float64_to_int64_round_to_zero(q, s); |
| 2819 |
|
| 2820 |
/* reciprocal root r */
|
| 2821 |
/* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */
|
| 2822 |
q = int64_to_float64(q_int, s); |
| 2823 |
q = float64_add(q, float64_half, s); |
| 2824 |
q = float64_div(q, float64_512, s); |
| 2825 |
q = float64_sqrt(q, s); |
| 2826 |
q = float64_div(float64_one, q, s); |
| 2827 |
} else {
|
| 2828 |
/* range 0.5 <= a < 1.0 */
|
| 2829 |
|
| 2830 |
/* a in units of 1/256 rounded down */
|
| 2831 |
/* q1 = (int)(a * 256.0); */
|
| 2832 |
q = float64_mul(float64_256, a, s); |
| 2833 |
int64_t q_int = float64_to_int64_round_to_zero(q, s); |
| 2834 |
|
| 2835 |
/* reciprocal root r */
|
| 2836 |
/* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
|
| 2837 |
q = int64_to_float64(q_int, s); |
| 2838 |
q = float64_add(q, float64_half, s); |
| 2839 |
q = float64_div(q, float64_256, s); |
| 2840 |
q = float64_sqrt(q, s); |
| 2841 |
q = float64_div(float64_one, q, s); |
| 2842 |
} |
| 2843 |
/* r in units of 1/256 rounded to nearest */
|
| 2844 |
/* s = (int)(256.0 * r + 0.5); */
|
| 2845 |
|
| 2846 |
q = float64_mul(q, float64_256,s ); |
| 2847 |
q = float64_add(q, float64_half, s); |
| 2848 |
q_int = float64_to_int64_round_to_zero(q, s); |
| 2849 |
|
| 2850 |
/* return (double)s / 256.0;*/
|
| 2851 |
return float64_div(int64_to_float64(q_int, s), float64_256, s);
|
| 2852 |
} |
| 2853 |
|
| 2854 |
float32 HELPER(rsqrte_f32)(float32 a, CPUARMState *env) |
| 2855 |
{
|
| 2856 |
float_status *s = &env->vfp.standard_fp_status; |
| 2857 |
int result_exp;
|
| 2858 |
float64 f64; |
| 2859 |
uint32_t val; |
| 2860 |
uint64_t val64; |
| 2861 |
|
| 2862 |
val = float32_val(a); |
| 2863 |
|
| 2864 |
if (float32_is_any_nan(a)) {
|
| 2865 |
if (float32_is_signaling_nan(a)) {
|
| 2866 |
float_raise(float_flag_invalid, s); |
| 2867 |
} |
| 2868 |
return float32_default_nan;
|
| 2869 |
} else if (float32_is_zero_or_denormal(a)) { |
| 2870 |
if (!float32_is_zero(a)) {
|
| 2871 |
float_raise(float_flag_input_denormal, s); |
| 2872 |
} |
| 2873 |
float_raise(float_flag_divbyzero, s); |
| 2874 |
return float32_set_sign(float32_infinity, float32_is_neg(a));
|
| 2875 |
} else if (float32_is_neg(a)) { |
| 2876 |
float_raise(float_flag_invalid, s); |
| 2877 |
return float32_default_nan;
|
| 2878 |
} else if (float32_is_infinity(a)) { |
| 2879 |
return float32_zero;
|
| 2880 |
} |
| 2881 |
|
| 2882 |
/* Normalize to a double-precision value between 0.25 and 1.0,
|
| 2883 |
* preserving the parity of the exponent. */
|
| 2884 |
if ((val & 0x800000) == 0) { |
| 2885 |
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32) |
| 2886 |
| (0x3feULL << 52) |
| 2887 |
| ((uint64_t)(val & 0x7fffff) << 29)); |
| 2888 |
} else {
|
| 2889 |
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32) |
| 2890 |
| (0x3fdULL << 52) |
| 2891 |
| ((uint64_t)(val & 0x7fffff) << 29)); |
| 2892 |
} |
| 2893 |
|
| 2894 |
result_exp = (380 - ((val & 0x7f800000) >> 23)) / 2; |
| 2895 |
|
| 2896 |
f64 = recip_sqrt_estimate(f64, env); |
| 2897 |
|
| 2898 |
val64 = float64_val(f64); |
| 2899 |
|
| 2900 |
val = ((result_exp & 0xff) << 23) |
| 2901 |
| ((val64 >> 29) & 0x7fffff); |
| 2902 |
return make_float32(val);
|
| 2903 |
} |
| 2904 |
|
| 2905 |
uint32_t HELPER(recpe_u32)(uint32_t a, CPUARMState *env) |
| 2906 |
{
|
| 2907 |
float64 f64; |
| 2908 |
|
| 2909 |
if ((a & 0x80000000) == 0) { |
| 2910 |
return 0xffffffff; |
| 2911 |
} |
| 2912 |
|
| 2913 |
f64 = make_float64((0x3feULL << 52) |
| 2914 |
| ((int64_t)(a & 0x7fffffff) << 21)); |
| 2915 |
|
| 2916 |
f64 = recip_estimate (f64, env); |
| 2917 |
|
| 2918 |
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); |
| 2919 |
} |
| 2920 |
|
| 2921 |
uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUARMState *env) |
| 2922 |
{
|
| 2923 |
float64 f64; |
| 2924 |
|
| 2925 |
if ((a & 0xc0000000) == 0) { |
| 2926 |
return 0xffffffff; |
| 2927 |
} |
| 2928 |
|
| 2929 |
if (a & 0x80000000) { |
| 2930 |
f64 = make_float64((0x3feULL << 52) |
| 2931 |
| ((uint64_t)(a & 0x7fffffff) << 21)); |
| 2932 |
} else { /* bits 31-30 == '01' */ |
| 2933 |
f64 = make_float64((0x3fdULL << 52) |
| 2934 |
| ((uint64_t)(a & 0x3fffffff) << 22)); |
| 2935 |
} |
| 2936 |
|
| 2937 |
f64 = recip_sqrt_estimate(f64, env); |
| 2938 |
|
| 2939 |
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); |
| 2940 |
} |
| 2941 |
|
| 2942 |
/* VFPv4 fused multiply-accumulate */
|
| 2943 |
float32 VFP_HELPER(muladd, s)(float32 a, float32 b, float32 c, void *fpstp)
|
| 2944 |
{
|
| 2945 |
float_status *fpst = fpstp; |
| 2946 |
return float32_muladd(a, b, c, 0, fpst); |
| 2947 |
} |
| 2948 |
|
| 2949 |
float64 VFP_HELPER(muladd, d)(float64 a, float64 b, float64 c, void *fpstp)
|
| 2950 |
{
|
| 2951 |
float_status *fpst = fpstp; |
| 2952 |
return float64_muladd(a, b, c, 0, fpst); |
| 2953 |
} |
| 2954 |
|
| 2955 |
void HELPER(set_teecr)(CPUARMState *env, uint32_t val)
|
| 2956 |
{
|
| 2957 |
val &= 1;
|
| 2958 |
if (env->teecr != val) {
|
| 2959 |
env->teecr = val; |
| 2960 |
tb_flush(env); |
| 2961 |
} |
| 2962 |
} |