root / target-arm / helper.c @ 9ee6e8bb
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#include <stdio.h> |
---|---|
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "cpu.h" |
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#include "exec-all.h" |
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#include "gdbstub.h" |
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|
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static uint32_t cortexa8_cp15_c0_c1[8] = |
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{ 0x1031, 0x11, 0x400, 0, 0x31100003, 0x20000000, 0x01202000, 0x11 }; |
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|
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static uint32_t cortexa8_cp15_c0_c2[8] = |
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{ 0x00101111, 0x12112111, 0x21232031, 0x11112131, 0x00111142, 0, 0, 0 }; |
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|
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static uint32_t mpcore_cp15_c0_c1[8] = |
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{ 0x111, 0x1, 0, 0x2, 0x01100103, 0x10020302, 0x01222000, 0 }; |
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|
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static uint32_t mpcore_cp15_c0_c2[8] = |
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{ 0x00100011, 0x12002111, 0x11221011, 0x01102131, 0x141, 0, 0, 0 }; |
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|
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static uint32_t arm1136_cp15_c0_c1[8] = |
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{ 0x111, 0x1, 0x2, 0x3, 0x01130003, 0x10030302, 0x01222110, 0 }; |
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|
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static uint32_t arm1136_cp15_c0_c2[8] = |
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{ 0x00140011, 0x12002111, 0x11231111, 0x01102131, 0x141, 0, 0, 0 }; |
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|
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static uint32_t cpu_arm_find_by_name(const char *name); |
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|
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static inline void set_feature(CPUARMState *env, int feature) |
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{ |
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env->features |= 1u << feature;
|
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} |
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|
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static void cpu_reset_model_id(CPUARMState *env, uint32_t id) |
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{ |
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env->cp15.c0_cpuid = id; |
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switch (id) {
|
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case ARM_CPUID_ARM926:
|
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set_feature(env, ARM_FEATURE_VFP); |
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env->vfp.xregs[ARM_VFP_FPSID] = 0x41011090;
|
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env->cp15.c0_cachetype = 0x1dd20d2;
|
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env->cp15.c1_sys = 0x00090078;
|
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break;
|
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case ARM_CPUID_ARM946:
|
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set_feature(env, ARM_FEATURE_MPU); |
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env->cp15.c0_cachetype = 0x0f004006;
|
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env->cp15.c1_sys = 0x00000078;
|
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break;
|
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case ARM_CPUID_ARM1026:
|
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set_feature(env, ARM_FEATURE_VFP); |
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set_feature(env, ARM_FEATURE_AUXCR); |
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env->vfp.xregs[ARM_VFP_FPSID] = 0x410110a0;
|
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env->cp15.c0_cachetype = 0x1dd20d2;
|
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env->cp15.c1_sys = 0x00090078;
|
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break;
|
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case ARM_CPUID_ARM1136:
|
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set_feature(env, ARM_FEATURE_V6); |
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set_feature(env, ARM_FEATURE_VFP); |
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set_feature(env, ARM_FEATURE_AUXCR); |
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env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
|
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env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
|
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env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
|
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memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c1, 8 * sizeof(uint32_t)); |
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memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c2, 8 * sizeof(uint32_t)); |
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env->cp15.c0_cachetype = 0x1dd20d2;
|
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break;
|
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case ARM_CPUID_ARM11MPCORE:
|
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set_feature(env, ARM_FEATURE_V6); |
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set_feature(env, ARM_FEATURE_V6K); |
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set_feature(env, ARM_FEATURE_VFP); |
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set_feature(env, ARM_FEATURE_AUXCR); |
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env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
|
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env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
|
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env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
|
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memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c1, 8 * sizeof(uint32_t)); |
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memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c2, 8 * sizeof(uint32_t)); |
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env->cp15.c0_cachetype = 0x1dd20d2;
|
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break;
|
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case ARM_CPUID_CORTEXA8:
|
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set_feature(env, ARM_FEATURE_V6); |
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set_feature(env, ARM_FEATURE_V6K); |
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set_feature(env, ARM_FEATURE_V7); |
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set_feature(env, ARM_FEATURE_AUXCR); |
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set_feature(env, ARM_FEATURE_THUMB2); |
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set_feature(env, ARM_FEATURE_VFP); |
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set_feature(env, ARM_FEATURE_VFP3); |
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set_feature(env, ARM_FEATURE_NEON); |
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env->vfp.xregs[ARM_VFP_FPSID] = 0x410330c0;
|
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env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222;
|
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env->vfp.xregs[ARM_VFP_MVFR1] = 0x00011100;
|
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memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c1, 8 * sizeof(uint32_t)); |
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memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c2, 8 * sizeof(uint32_t)); |
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env->cp15.c0_cachetype = 0x1dd20d2;
|
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break;
|
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case ARM_CPUID_CORTEXM3:
|
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set_feature(env, ARM_FEATURE_V6); |
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set_feature(env, ARM_FEATURE_THUMB2); |
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set_feature(env, ARM_FEATURE_V7); |
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set_feature(env, ARM_FEATURE_M); |
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set_feature(env, ARM_FEATURE_DIV); |
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break;
|
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case ARM_CPUID_ANY: /* For userspace emulation. */ |
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set_feature(env, ARM_FEATURE_V6); |
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set_feature(env, ARM_FEATURE_V6K); |
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set_feature(env, ARM_FEATURE_V7); |
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set_feature(env, ARM_FEATURE_THUMB2); |
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set_feature(env, ARM_FEATURE_VFP); |
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set_feature(env, ARM_FEATURE_VFP3); |
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set_feature(env, ARM_FEATURE_NEON); |
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set_feature(env, ARM_FEATURE_DIV); |
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break;
|
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case ARM_CPUID_TI915T:
|
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case ARM_CPUID_TI925T:
|
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set_feature(env, ARM_FEATURE_OMAPCP); |
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env->cp15.c0_cpuid = ARM_CPUID_TI925T; /* Depends on wiring. */
|
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env->cp15.c0_cachetype = 0x5109149;
|
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env->cp15.c1_sys = 0x00000070;
|
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env->cp15.c15_i_max = 0x000;
|
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env->cp15.c15_i_min = 0xff0;
|
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break;
|
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case ARM_CPUID_PXA250:
|
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case ARM_CPUID_PXA255:
|
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case ARM_CPUID_PXA260:
|
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case ARM_CPUID_PXA261:
|
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case ARM_CPUID_PXA262:
|
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set_feature(env, ARM_FEATURE_XSCALE); |
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/* JTAG_ID is ((id << 28) | 0x09265013) */
|
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env->cp15.c0_cachetype = 0xd172172;
|
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env->cp15.c1_sys = 0x00000078;
|
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break;
|
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case ARM_CPUID_PXA270_A0:
|
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case ARM_CPUID_PXA270_A1:
|
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case ARM_CPUID_PXA270_B0:
|
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case ARM_CPUID_PXA270_B1:
|
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case ARM_CPUID_PXA270_C0:
|
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case ARM_CPUID_PXA270_C5:
|
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set_feature(env, ARM_FEATURE_XSCALE); |
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/* JTAG_ID is ((id << 28) | 0x09265013) */
|
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set_feature(env, ARM_FEATURE_IWMMXT); |
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env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q'; |
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env->cp15.c0_cachetype = 0xd172172;
|
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env->cp15.c1_sys = 0x00000078;
|
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break;
|
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default:
|
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cpu_abort(env, "Bad CPU ID: %x\n", id);
|
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break;
|
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} |
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} |
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|
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void cpu_reset(CPUARMState *env)
|
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{ |
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uint32_t id; |
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id = env->cp15.c0_cpuid; |
154 |
memset(env, 0, offsetof(CPUARMState, breakpoints));
|
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if (id)
|
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cpu_reset_model_id(env, id); |
157 |
#if defined (CONFIG_USER_ONLY)
|
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env->uncached_cpsr = ARM_CPU_MODE_USR; |
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env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30; |
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#else
|
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/* SVC mode with interrupts disabled. */
|
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env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I; |
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/* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is
|
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clear at reset. */
|
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if (IS_M(env))
|
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env->uncached_cpsr &= ~CPSR_I; |
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env->vfp.xregs[ARM_VFP_FPEXC] = 0;
|
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#endif
|
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env->regs[15] = 0; |
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tlb_flush(env, 1);
|
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} |
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|
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CPUARMState *cpu_arm_init(const char *cpu_model) |
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{ |
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CPUARMState *env; |
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uint32_t id; |
177 |
|
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id = cpu_arm_find_by_name(cpu_model); |
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if (id == 0) |
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return NULL; |
181 |
env = qemu_mallocz(sizeof(CPUARMState));
|
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if (!env)
|
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return NULL; |
184 |
cpu_exec_init(env); |
185 |
env->cp15.c0_cpuid = id; |
186 |
cpu_reset(env); |
187 |
return env;
|
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} |
189 |
|
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struct arm_cpu_t {
|
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uint32_t id; |
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const char *name; |
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}; |
194 |
|
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static const struct arm_cpu_t arm_cpu_names[] = { |
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{ ARM_CPUID_ARM926, "arm926"},
|
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{ ARM_CPUID_ARM946, "arm946"},
|
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{ ARM_CPUID_ARM1026, "arm1026"},
|
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{ ARM_CPUID_ARM1136, "arm1136"},
|
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{ ARM_CPUID_ARM11MPCORE, "arm11mpcore"},
|
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{ ARM_CPUID_CORTEXM3, "cortex-m3"},
|
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{ ARM_CPUID_CORTEXA8, "cortex-a8"},
|
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{ ARM_CPUID_TI925T, "ti925t" },
|
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{ ARM_CPUID_PXA250, "pxa250" },
|
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{ ARM_CPUID_PXA255, "pxa255" },
|
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{ ARM_CPUID_PXA260, "pxa260" },
|
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{ ARM_CPUID_PXA261, "pxa261" },
|
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{ ARM_CPUID_PXA262, "pxa262" },
|
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{ ARM_CPUID_PXA270, "pxa270" },
|
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{ ARM_CPUID_PXA270_A0, "pxa270-a0" },
|
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{ ARM_CPUID_PXA270_A1, "pxa270-a1" },
|
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{ ARM_CPUID_PXA270_B0, "pxa270-b0" },
|
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{ ARM_CPUID_PXA270_B1, "pxa270-b1" },
|
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{ ARM_CPUID_PXA270_C0, "pxa270-c0" },
|
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{ ARM_CPUID_PXA270_C5, "pxa270-c5" },
|
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{ ARM_CPUID_ANY, "any"},
|
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{ 0, NULL} |
218 |
}; |
219 |
|
220 |
void arm_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) |
221 |
{ |
222 |
int i;
|
223 |
|
224 |
(*cpu_fprintf)(f, "Available CPUs:\n");
|
225 |
for (i = 0; arm_cpu_names[i].name; i++) { |
226 |
(*cpu_fprintf)(f, " %s\n", arm_cpu_names[i].name);
|
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} |
228 |
} |
229 |
|
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/* return 0 if not found */
|
231 |
static uint32_t cpu_arm_find_by_name(const char *name) |
232 |
{ |
233 |
int i;
|
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uint32_t id; |
235 |
|
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id = 0;
|
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for (i = 0; arm_cpu_names[i].name; i++) { |
238 |
if (strcmp(name, arm_cpu_names[i].name) == 0) { |
239 |
id = arm_cpu_names[i].id; |
240 |
break;
|
241 |
} |
242 |
} |
243 |
return id;
|
244 |
} |
245 |
|
246 |
void cpu_arm_close(CPUARMState *env)
|
247 |
{ |
248 |
free(env); |
249 |
} |
250 |
|
251 |
/* Polynomial multiplication is like integer multiplcation except the
|
252 |
partial products are XORed, not added. */
|
253 |
uint32_t helper_neon_mul_p8(uint32_t op1, uint32_t op2) |
254 |
{ |
255 |
uint32_t mask; |
256 |
uint32_t result; |
257 |
result = 0;
|
258 |
while (op1) {
|
259 |
mask = 0;
|
260 |
if (op1 & 1) |
261 |
mask |= 0xff;
|
262 |
if (op1 & (1 << 8)) |
263 |
mask |= (0xff << 8); |
264 |
if (op1 & (1 << 16)) |
265 |
mask |= (0xff << 16); |
266 |
if (op1 & (1 << 24)) |
267 |
mask |= (0xff << 24); |
268 |
result ^= op2 & mask; |
269 |
op1 = (op1 >> 1) & 0x7f7f7f7f; |
270 |
op2 = (op2 << 1) & 0xfefefefe; |
271 |
} |
272 |
return result;
|
273 |
} |
274 |
|
275 |
#if defined(CONFIG_USER_ONLY)
|
276 |
|
277 |
void do_interrupt (CPUState *env)
|
278 |
{ |
279 |
env->exception_index = -1;
|
280 |
} |
281 |
|
282 |
/* Structure used to record exclusive memory locations. */
|
283 |
typedef struct mmon_state { |
284 |
struct mmon_state *next;
|
285 |
CPUARMState *cpu_env; |
286 |
uint32_t addr; |
287 |
} mmon_state; |
288 |
|
289 |
/* Chain of current locks. */
|
290 |
static mmon_state* mmon_head = NULL; |
291 |
|
292 |
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw, |
293 |
int mmu_idx, int is_softmmu) |
294 |
{ |
295 |
if (rw == 2) { |
296 |
env->exception_index = EXCP_PREFETCH_ABORT; |
297 |
env->cp15.c6_insn = address; |
298 |
} else {
|
299 |
env->exception_index = EXCP_DATA_ABORT; |
300 |
env->cp15.c6_data = address; |
301 |
} |
302 |
return 1; |
303 |
} |
304 |
|
305 |
static void allocate_mmon_state(CPUState *env) |
306 |
{ |
307 |
env->mmon_entry = malloc(sizeof (mmon_state));
|
308 |
if (!env->mmon_entry)
|
309 |
abort(); |
310 |
memset (env->mmon_entry, 0, sizeof (mmon_state)); |
311 |
env->mmon_entry->cpu_env = env; |
312 |
mmon_head = env->mmon_entry; |
313 |
} |
314 |
|
315 |
/* Flush any monitor locks for the specified address. */
|
316 |
static void flush_mmon(uint32_t addr) |
317 |
{ |
318 |
mmon_state *mon; |
319 |
|
320 |
for (mon = mmon_head; mon; mon = mon->next)
|
321 |
{ |
322 |
if (mon->addr != addr)
|
323 |
continue;
|
324 |
|
325 |
mon->addr = 0;
|
326 |
break;
|
327 |
} |
328 |
} |
329 |
|
330 |
/* Mark an address for exclusive access. */
|
331 |
void helper_mark_exclusive(CPUState *env, uint32_t addr)
|
332 |
{ |
333 |
if (!env->mmon_entry)
|
334 |
allocate_mmon_state(env); |
335 |
/* Clear any previous locks. */
|
336 |
flush_mmon(addr); |
337 |
env->mmon_entry->addr = addr; |
338 |
} |
339 |
|
340 |
/* Test if an exclusive address is still exclusive. Returns zero
|
341 |
if the address is still exclusive. */
|
342 |
int helper_test_exclusive(CPUState *env, uint32_t addr)
|
343 |
{ |
344 |
int res;
|
345 |
|
346 |
if (!env->mmon_entry)
|
347 |
return 1; |
348 |
if (env->mmon_entry->addr == addr)
|
349 |
res = 0;
|
350 |
else
|
351 |
res = 1;
|
352 |
flush_mmon(addr); |
353 |
return res;
|
354 |
} |
355 |
|
356 |
void helper_clrex(CPUState *env)
|
357 |
{ |
358 |
if (!(env->mmon_entry && env->mmon_entry->addr))
|
359 |
return;
|
360 |
flush_mmon(env->mmon_entry->addr); |
361 |
} |
362 |
|
363 |
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
364 |
{ |
365 |
return addr;
|
366 |
} |
367 |
|
368 |
/* These should probably raise undefined insn exceptions. */
|
369 |
void helper_set_cp(CPUState *env, uint32_t insn, uint32_t val)
|
370 |
{ |
371 |
int op1 = (insn >> 8) & 0xf; |
372 |
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
|
373 |
return;
|
374 |
} |
375 |
|
376 |
uint32_t helper_get_cp(CPUState *env, uint32_t insn) |
377 |
{ |
378 |
int op1 = (insn >> 8) & 0xf; |
379 |
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
|
380 |
return 0; |
381 |
} |
382 |
|
383 |
void helper_set_cp15(CPUState *env, uint32_t insn, uint32_t val)
|
384 |
{ |
385 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
386 |
} |
387 |
|
388 |
uint32_t helper_get_cp15(CPUState *env, uint32_t insn) |
389 |
{ |
390 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
391 |
return 0; |
392 |
} |
393 |
|
394 |
/* These should probably raise undefined insn exceptions. */
|
395 |
void helper_v7m_msr(CPUState *env, int reg, uint32_t val) |
396 |
{ |
397 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
398 |
} |
399 |
|
400 |
uint32_t helper_v7m_mrs(CPUState *env, int reg)
|
401 |
{ |
402 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
403 |
return 0; |
404 |
} |
405 |
|
406 |
void switch_mode(CPUState *env, int mode) |
407 |
{ |
408 |
if (mode != ARM_CPU_MODE_USR)
|
409 |
cpu_abort(env, "Tried to switch out of user mode\n");
|
410 |
} |
411 |
|
412 |
void helper_set_r13_banked(CPUState *env, int mode, uint32_t val) |
413 |
{ |
414 |
cpu_abort(env, "banked r13 write\n");
|
415 |
} |
416 |
|
417 |
uint32_t helper_get_r13_banked(CPUState *env, int mode)
|
418 |
{ |
419 |
cpu_abort(env, "banked r13 read\n");
|
420 |
return 0; |
421 |
} |
422 |
|
423 |
#else
|
424 |
|
425 |
extern int semihosting_enabled; |
426 |
|
427 |
/* Map CPU modes onto saved register banks. */
|
428 |
static inline int bank_number (int mode) |
429 |
{ |
430 |
switch (mode) {
|
431 |
case ARM_CPU_MODE_USR:
|
432 |
case ARM_CPU_MODE_SYS:
|
433 |
return 0; |
434 |
case ARM_CPU_MODE_SVC:
|
435 |
return 1; |
436 |
case ARM_CPU_MODE_ABT:
|
437 |
return 2; |
438 |
case ARM_CPU_MODE_UND:
|
439 |
return 3; |
440 |
case ARM_CPU_MODE_IRQ:
|
441 |
return 4; |
442 |
case ARM_CPU_MODE_FIQ:
|
443 |
return 5; |
444 |
} |
445 |
cpu_abort(cpu_single_env, "Bad mode %x\n", mode);
|
446 |
return -1; |
447 |
} |
448 |
|
449 |
void switch_mode(CPUState *env, int mode) |
450 |
{ |
451 |
int old_mode;
|
452 |
int i;
|
453 |
|
454 |
old_mode = env->uncached_cpsr & CPSR_M; |
455 |
if (mode == old_mode)
|
456 |
return;
|
457 |
|
458 |
if (old_mode == ARM_CPU_MODE_FIQ) {
|
459 |
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
460 |
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); |
461 |
} else if (mode == ARM_CPU_MODE_FIQ) { |
462 |
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
463 |
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); |
464 |
} |
465 |
|
466 |
i = bank_number(old_mode); |
467 |
env->banked_r13[i] = env->regs[13];
|
468 |
env->banked_r14[i] = env->regs[14];
|
469 |
env->banked_spsr[i] = env->spsr; |
470 |
|
471 |
i = bank_number(mode); |
472 |
env->regs[13] = env->banked_r13[i];
|
473 |
env->regs[14] = env->banked_r14[i];
|
474 |
env->spsr = env->banked_spsr[i]; |
475 |
} |
476 |
|
477 |
static void v7m_push(CPUARMState *env, uint32_t val) |
478 |
{ |
479 |
env->regs[13] -= 4; |
480 |
stl_phys(env->regs[13], val);
|
481 |
} |
482 |
|
483 |
static uint32_t v7m_pop(CPUARMState *env)
|
484 |
{ |
485 |
uint32_t val; |
486 |
val = ldl_phys(env->regs[13]);
|
487 |
env->regs[13] += 4; |
488 |
return val;
|
489 |
} |
490 |
|
491 |
/* Switch to V7M main or process stack pointer. */
|
492 |
static void switch_v7m_sp(CPUARMState *env, int process) |
493 |
{ |
494 |
uint32_t tmp; |
495 |
if (env->v7m.current_sp != process) {
|
496 |
tmp = env->v7m.other_sp; |
497 |
env->v7m.other_sp = env->regs[13];
|
498 |
env->regs[13] = tmp;
|
499 |
env->v7m.current_sp = process; |
500 |
} |
501 |
} |
502 |
|
503 |
static void do_v7m_exception_exit(CPUARMState *env) |
504 |
{ |
505 |
uint32_t type; |
506 |
uint32_t xpsr; |
507 |
|
508 |
type = env->regs[15];
|
509 |
if (env->v7m.exception != 0) |
510 |
armv7m_nvic_complete_irq(env->v7m.nvic, env->v7m.exception); |
511 |
|
512 |
/* Switch to the target stack. */
|
513 |
switch_v7m_sp(env, (type & 4) != 0); |
514 |
/* Pop registers. */
|
515 |
env->regs[0] = v7m_pop(env);
|
516 |
env->regs[1] = v7m_pop(env);
|
517 |
env->regs[2] = v7m_pop(env);
|
518 |
env->regs[3] = v7m_pop(env);
|
519 |
env->regs[12] = v7m_pop(env);
|
520 |
env->regs[14] = v7m_pop(env);
|
521 |
env->regs[15] = v7m_pop(env);
|
522 |
xpsr = v7m_pop(env); |
523 |
xpsr_write(env, xpsr, 0xfffffdff);
|
524 |
/* Undo stack alignment. */
|
525 |
if (xpsr & 0x200) |
526 |
env->regs[13] |= 4; |
527 |
/* ??? The exception return type specifies Thread/Handler mode. However
|
528 |
this is also implied by the xPSR value. Not sure what to do
|
529 |
if there is a mismatch. */
|
530 |
/* ??? Likewise for mismatches between the CONTROL register and the stack
|
531 |
pointer. */
|
532 |
} |
533 |
|
534 |
void do_interrupt_v7m(CPUARMState *env)
|
535 |
{ |
536 |
uint32_t xpsr = xpsr_read(env); |
537 |
uint32_t lr; |
538 |
uint32_t addr; |
539 |
|
540 |
lr = 0xfffffff1;
|
541 |
if (env->v7m.current_sp)
|
542 |
lr |= 4;
|
543 |
if (env->v7m.exception == 0) |
544 |
lr |= 8;
|
545 |
|
546 |
/* For exceptions we just mark as pending on the NVIC, and let that
|
547 |
handle it. */
|
548 |
/* TODO: Need to escalate if the current priority is higher than the
|
549 |
one we're raising. */
|
550 |
switch (env->exception_index) {
|
551 |
case EXCP_UDEF:
|
552 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_USAGE); |
553 |
return;
|
554 |
case EXCP_SWI:
|
555 |
env->regs[15] += 2; |
556 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_SVC); |
557 |
return;
|
558 |
case EXCP_PREFETCH_ABORT:
|
559 |
case EXCP_DATA_ABORT:
|
560 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_MEM); |
561 |
return;
|
562 |
case EXCP_BKPT:
|
563 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_DEBUG); |
564 |
return;
|
565 |
case EXCP_IRQ:
|
566 |
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->v7m.nvic); |
567 |
break;
|
568 |
case EXCP_EXCEPTION_EXIT:
|
569 |
do_v7m_exception_exit(env); |
570 |
return;
|
571 |
default:
|
572 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
573 |
return; /* Never happens. Keep compiler happy. */ |
574 |
} |
575 |
|
576 |
/* Align stack pointer. */
|
577 |
/* ??? Should only do this if Configuration Control Register
|
578 |
STACKALIGN bit is set. */
|
579 |
if (env->regs[13] & 4) { |
580 |
env->regs[13] += 4; |
581 |
xpsr |= 0x200;
|
582 |
} |
583 |
/* Switch to the hander mode. */
|
584 |
v7m_push(env, xpsr); |
585 |
v7m_push(env, env->regs[15]);
|
586 |
v7m_push(env, env->regs[14]);
|
587 |
v7m_push(env, env->regs[12]);
|
588 |
v7m_push(env, env->regs[3]);
|
589 |
v7m_push(env, env->regs[2]);
|
590 |
v7m_push(env, env->regs[1]);
|
591 |
v7m_push(env, env->regs[0]);
|
592 |
switch_v7m_sp(env, 0);
|
593 |
env->uncached_cpsr &= ~CPSR_IT; |
594 |
env->regs[14] = lr;
|
595 |
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
|
596 |
env->regs[15] = addr & 0xfffffffe; |
597 |
env->thumb = addr & 1;
|
598 |
} |
599 |
|
600 |
/* Handle a CPU exception. */
|
601 |
void do_interrupt(CPUARMState *env)
|
602 |
{ |
603 |
uint32_t addr; |
604 |
uint32_t mask; |
605 |
int new_mode;
|
606 |
uint32_t offset; |
607 |
|
608 |
if (IS_M(env)) {
|
609 |
do_interrupt_v7m(env); |
610 |
return;
|
611 |
} |
612 |
/* TODO: Vectored interrupt controller. */
|
613 |
switch (env->exception_index) {
|
614 |
case EXCP_UDEF:
|
615 |
new_mode = ARM_CPU_MODE_UND; |
616 |
addr = 0x04;
|
617 |
mask = CPSR_I; |
618 |
if (env->thumb)
|
619 |
offset = 2;
|
620 |
else
|
621 |
offset = 4;
|
622 |
break;
|
623 |
case EXCP_SWI:
|
624 |
if (semihosting_enabled) {
|
625 |
/* Check for semihosting interrupt. */
|
626 |
if (env->thumb) {
|
627 |
mask = lduw_code(env->regs[15] - 2) & 0xff; |
628 |
} else {
|
629 |
mask = ldl_code(env->regs[15] - 4) & 0xffffff; |
630 |
} |
631 |
/* Only intercept calls from privileged modes, to provide some
|
632 |
semblance of security. */
|
633 |
if (((mask == 0x123456 && !env->thumb) |
634 |
|| (mask == 0xab && env->thumb))
|
635 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { |
636 |
env->regs[0] = do_arm_semihosting(env);
|
637 |
return;
|
638 |
} |
639 |
} |
640 |
new_mode = ARM_CPU_MODE_SVC; |
641 |
addr = 0x08;
|
642 |
mask = CPSR_I; |
643 |
/* The PC already points to the next instructon. */
|
644 |
offset = 0;
|
645 |
break;
|
646 |
case EXCP_BKPT:
|
647 |
/* See if this is a semihosting syscall. */
|
648 |
if (env->thumb) {
|
649 |
mask = lduw_code(env->regs[15]) & 0xff; |
650 |
if (mask == 0xab |
651 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { |
652 |
env->regs[15] += 2; |
653 |
env->regs[0] = do_arm_semihosting(env);
|
654 |
return;
|
655 |
} |
656 |
} |
657 |
/* Fall through to prefetch abort. */
|
658 |
case EXCP_PREFETCH_ABORT:
|
659 |
new_mode = ARM_CPU_MODE_ABT; |
660 |
addr = 0x0c;
|
661 |
mask = CPSR_A | CPSR_I; |
662 |
offset = 4;
|
663 |
break;
|
664 |
case EXCP_DATA_ABORT:
|
665 |
new_mode = ARM_CPU_MODE_ABT; |
666 |
addr = 0x10;
|
667 |
mask = CPSR_A | CPSR_I; |
668 |
offset = 8;
|
669 |
break;
|
670 |
case EXCP_IRQ:
|
671 |
new_mode = ARM_CPU_MODE_IRQ; |
672 |
addr = 0x18;
|
673 |
/* Disable IRQ and imprecise data aborts. */
|
674 |
mask = CPSR_A | CPSR_I; |
675 |
offset = 4;
|
676 |
break;
|
677 |
case EXCP_FIQ:
|
678 |
new_mode = ARM_CPU_MODE_FIQ; |
679 |
addr = 0x1c;
|
680 |
/* Disable FIQ, IRQ and imprecise data aborts. */
|
681 |
mask = CPSR_A | CPSR_I | CPSR_F; |
682 |
offset = 4;
|
683 |
break;
|
684 |
default:
|
685 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
686 |
return; /* Never happens. Keep compiler happy. */ |
687 |
} |
688 |
/* High vectors. */
|
689 |
if (env->cp15.c1_sys & (1 << 13)) { |
690 |
addr += 0xffff0000;
|
691 |
} |
692 |
switch_mode (env, new_mode); |
693 |
env->spsr = cpsr_read(env); |
694 |
/* Clear IT bits. */
|
695 |
env->condexec_bits = 0;
|
696 |
/* Switch to the new mode, and switch to Arm mode. */
|
697 |
/* ??? Thumb interrupt handlers not implemented. */
|
698 |
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode; |
699 |
env->uncached_cpsr |= mask; |
700 |
env->thumb = 0;
|
701 |
env->regs[14] = env->regs[15] + offset; |
702 |
env->regs[15] = addr;
|
703 |
env->interrupt_request |= CPU_INTERRUPT_EXITTB; |
704 |
} |
705 |
|
706 |
/* Check section/page access permissions.
|
707 |
Returns the page protection flags, or zero if the access is not
|
708 |
permitted. */
|
709 |
static inline int check_ap(CPUState *env, int ap, int domain, int access_type, |
710 |
int is_user)
|
711 |
{ |
712 |
int prot_ro;
|
713 |
|
714 |
if (domain == 3) |
715 |
return PAGE_READ | PAGE_WRITE;
|
716 |
|
717 |
if (access_type == 1) |
718 |
prot_ro = 0;
|
719 |
else
|
720 |
prot_ro = PAGE_READ; |
721 |
|
722 |
switch (ap) {
|
723 |
case 0: |
724 |
if (access_type == 1) |
725 |
return 0; |
726 |
switch ((env->cp15.c1_sys >> 8) & 3) { |
727 |
case 1: |
728 |
return is_user ? 0 : PAGE_READ; |
729 |
case 2: |
730 |
return PAGE_READ;
|
731 |
default:
|
732 |
return 0; |
733 |
} |
734 |
case 1: |
735 |
return is_user ? 0 : PAGE_READ | PAGE_WRITE; |
736 |
case 2: |
737 |
if (is_user)
|
738 |
return prot_ro;
|
739 |
else
|
740 |
return PAGE_READ | PAGE_WRITE;
|
741 |
case 3: |
742 |
return PAGE_READ | PAGE_WRITE;
|
743 |
case 4: case 7: /* Reserved. */ |
744 |
return 0; |
745 |
case 5: |
746 |
return is_user ? 0 : prot_ro; |
747 |
case 6: |
748 |
return prot_ro;
|
749 |
default:
|
750 |
abort(); |
751 |
} |
752 |
} |
753 |
|
754 |
static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type, |
755 |
int is_user, uint32_t *phys_ptr, int *prot) |
756 |
{ |
757 |
int code;
|
758 |
uint32_t table; |
759 |
uint32_t desc; |
760 |
int type;
|
761 |
int ap;
|
762 |
int domain;
|
763 |
uint32_t phys_addr; |
764 |
|
765 |
/* Pagetable walk. */
|
766 |
/* Lookup l1 descriptor. */
|
767 |
if (address & env->cp15.c2_mask)
|
768 |
table = env->cp15.c2_base1; |
769 |
else
|
770 |
table = env->cp15.c2_base0; |
771 |
table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc); |
772 |
desc = ldl_phys(table); |
773 |
type = (desc & 3);
|
774 |
domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3; |
775 |
if (type == 0) { |
776 |
/* Secton translation fault. */
|
777 |
code = 5;
|
778 |
goto do_fault;
|
779 |
} |
780 |
if (domain == 0 || domain == 2) { |
781 |
if (type == 2) |
782 |
code = 9; /* Section domain fault. */ |
783 |
else
|
784 |
code = 11; /* Page domain fault. */ |
785 |
goto do_fault;
|
786 |
} |
787 |
if (type == 2) { |
788 |
/* 1Mb section. */
|
789 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
790 |
ap = (desc >> 10) & 3; |
791 |
code = 13;
|
792 |
} else {
|
793 |
/* Lookup l2 entry. */
|
794 |
if (type == 1) { |
795 |
/* Coarse pagetable. */
|
796 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
797 |
} else {
|
798 |
/* Fine pagetable. */
|
799 |
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc); |
800 |
} |
801 |
desc = ldl_phys(table); |
802 |
switch (desc & 3) { |
803 |
case 0: /* Page translation fault. */ |
804 |
code = 7;
|
805 |
goto do_fault;
|
806 |
case 1: /* 64k page. */ |
807 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
808 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
809 |
break;
|
810 |
case 2: /* 4k page. */ |
811 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
812 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
813 |
break;
|
814 |
case 3: /* 1k page. */ |
815 |
if (type == 1) { |
816 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
817 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
818 |
} else {
|
819 |
/* Page translation fault. */
|
820 |
code = 7;
|
821 |
goto do_fault;
|
822 |
} |
823 |
} else {
|
824 |
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff); |
825 |
} |
826 |
ap = (desc >> 4) & 3; |
827 |
break;
|
828 |
default:
|
829 |
/* Never happens, but compiler isn't smart enough to tell. */
|
830 |
abort(); |
831 |
} |
832 |
code = 15;
|
833 |
} |
834 |
*prot = check_ap(env, ap, domain, access_type, is_user); |
835 |
if (!*prot) {
|
836 |
/* Access permission fault. */
|
837 |
goto do_fault;
|
838 |
} |
839 |
*phys_ptr = phys_addr; |
840 |
return 0; |
841 |
do_fault:
|
842 |
return code | (domain << 4); |
843 |
} |
844 |
|
845 |
static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type, |
846 |
int is_user, uint32_t *phys_ptr, int *prot) |
847 |
{ |
848 |
int code;
|
849 |
uint32_t table; |
850 |
uint32_t desc; |
851 |
uint32_t xn; |
852 |
int type;
|
853 |
int ap;
|
854 |
int domain;
|
855 |
uint32_t phys_addr; |
856 |
|
857 |
/* Pagetable walk. */
|
858 |
/* Lookup l1 descriptor. */
|
859 |
if (address & env->cp15.c2_mask)
|
860 |
table = env->cp15.c2_base1; |
861 |
else
|
862 |
table = env->cp15.c2_base0; |
863 |
table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc); |
864 |
desc = ldl_phys(table); |
865 |
type = (desc & 3);
|
866 |
if (type == 0) { |
867 |
/* Secton translation fault. */
|
868 |
code = 5;
|
869 |
domain = 0;
|
870 |
goto do_fault;
|
871 |
} else if (type == 2 && (desc & (1 << 18))) { |
872 |
/* Supersection. */
|
873 |
domain = 0;
|
874 |
} else {
|
875 |
/* Section or page. */
|
876 |
domain = (desc >> 4) & 0x1e; |
877 |
} |
878 |
domain = (env->cp15.c3 >> domain) & 3;
|
879 |
if (domain == 0 || domain == 2) { |
880 |
if (type == 2) |
881 |
code = 9; /* Section domain fault. */ |
882 |
else
|
883 |
code = 11; /* Page domain fault. */ |
884 |
goto do_fault;
|
885 |
} |
886 |
if (type == 2) { |
887 |
if (desc & (1 << 18)) { |
888 |
/* Supersection. */
|
889 |
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff); |
890 |
} else {
|
891 |
/* Section. */
|
892 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
893 |
} |
894 |
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4); |
895 |
xn = desc & (1 << 4); |
896 |
code = 13;
|
897 |
} else {
|
898 |
/* Lookup l2 entry. */
|
899 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
900 |
desc = ldl_phys(table); |
901 |
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4); |
902 |
switch (desc & 3) { |
903 |
case 0: /* Page translation fault. */ |
904 |
code = 7;
|
905 |
goto do_fault;
|
906 |
case 1: /* 64k page. */ |
907 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
908 |
xn = desc & (1 << 15); |
909 |
break;
|
910 |
case 2: case 3: /* 4k page. */ |
911 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
912 |
xn = desc & 1;
|
913 |
break;
|
914 |
default:
|
915 |
/* Never happens, but compiler isn't smart enough to tell. */
|
916 |
abort(); |
917 |
} |
918 |
code = 15;
|
919 |
} |
920 |
if (xn && access_type == 2) |
921 |
goto do_fault;
|
922 |
|
923 |
*prot = check_ap(env, ap, domain, access_type, is_user); |
924 |
if (!*prot) {
|
925 |
/* Access permission fault. */
|
926 |
goto do_fault;
|
927 |
} |
928 |
*phys_ptr = phys_addr; |
929 |
return 0; |
930 |
do_fault:
|
931 |
return code | (domain << 4); |
932 |
} |
933 |
|
934 |
static int get_phys_addr_mpu(CPUState *env, uint32_t address, int access_type, |
935 |
int is_user, uint32_t *phys_ptr, int *prot) |
936 |
{ |
937 |
int n;
|
938 |
uint32_t mask; |
939 |
uint32_t base; |
940 |
|
941 |
*phys_ptr = address; |
942 |
for (n = 7; n >= 0; n--) { |
943 |
base = env->cp15.c6_region[n]; |
944 |
if ((base & 1) == 0) |
945 |
continue;
|
946 |
mask = 1 << ((base >> 1) & 0x1f); |
947 |
/* Keep this shift separate from the above to avoid an
|
948 |
(undefined) << 32. */
|
949 |
mask = (mask << 1) - 1; |
950 |
if (((base ^ address) & ~mask) == 0) |
951 |
break;
|
952 |
} |
953 |
if (n < 0) |
954 |
return 2; |
955 |
|
956 |
if (access_type == 2) { |
957 |
mask = env->cp15.c5_insn; |
958 |
} else {
|
959 |
mask = env->cp15.c5_data; |
960 |
} |
961 |
mask = (mask >> (n * 4)) & 0xf; |
962 |
switch (mask) {
|
963 |
case 0: |
964 |
return 1; |
965 |
case 1: |
966 |
if (is_user)
|
967 |
return 1; |
968 |
*prot = PAGE_READ | PAGE_WRITE; |
969 |
break;
|
970 |
case 2: |
971 |
*prot = PAGE_READ; |
972 |
if (!is_user)
|
973 |
*prot |= PAGE_WRITE; |
974 |
break;
|
975 |
case 3: |
976 |
*prot = PAGE_READ | PAGE_WRITE; |
977 |
break;
|
978 |
case 5: |
979 |
if (is_user)
|
980 |
return 1; |
981 |
*prot = PAGE_READ; |
982 |
break;
|
983 |
case 6: |
984 |
*prot = PAGE_READ; |
985 |
break;
|
986 |
default:
|
987 |
/* Bad permission. */
|
988 |
return 1; |
989 |
} |
990 |
return 0; |
991 |
} |
992 |
|
993 |
static inline int get_phys_addr(CPUState *env, uint32_t address, |
994 |
int access_type, int is_user, |
995 |
uint32_t *phys_ptr, int *prot)
|
996 |
{ |
997 |
/* Fast Context Switch Extension. */
|
998 |
if (address < 0x02000000) |
999 |
address += env->cp15.c13_fcse; |
1000 |
|
1001 |
if ((env->cp15.c1_sys & 1) == 0) { |
1002 |
/* MMU/MPU disabled. */
|
1003 |
*phys_ptr = address; |
1004 |
*prot = PAGE_READ | PAGE_WRITE; |
1005 |
return 0; |
1006 |
} else if (arm_feature(env, ARM_FEATURE_MPU)) { |
1007 |
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
|
1008 |
prot); |
1009 |
} else if (env->cp15.c1_sys & (1 << 23)) { |
1010 |
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
|
1011 |
prot); |
1012 |
} else {
|
1013 |
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
|
1014 |
prot); |
1015 |
} |
1016 |
} |
1017 |
|
1018 |
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address,
|
1019 |
int access_type, int mmu_idx, int is_softmmu) |
1020 |
{ |
1021 |
uint32_t phys_addr; |
1022 |
int prot;
|
1023 |
int ret, is_user;
|
1024 |
|
1025 |
is_user = mmu_idx == MMU_USER_IDX; |
1026 |
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot); |
1027 |
if (ret == 0) { |
1028 |
/* Map a single [sub]page. */
|
1029 |
phys_addr &= ~(uint32_t)0x3ff;
|
1030 |
address &= ~(uint32_t)0x3ff;
|
1031 |
return tlb_set_page (env, address, phys_addr, prot, mmu_idx,
|
1032 |
is_softmmu); |
1033 |
} |
1034 |
|
1035 |
if (access_type == 2) { |
1036 |
env->cp15.c5_insn = ret; |
1037 |
env->cp15.c6_insn = address; |
1038 |
env->exception_index = EXCP_PREFETCH_ABORT; |
1039 |
} else {
|
1040 |
env->cp15.c5_data = ret; |
1041 |
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) |
1042 |
env->cp15.c5_data |= (1 << 11); |
1043 |
env->cp15.c6_data = address; |
1044 |
env->exception_index = EXCP_DATA_ABORT; |
1045 |
} |
1046 |
return 1; |
1047 |
} |
1048 |
|
1049 |
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
1050 |
{ |
1051 |
uint32_t phys_addr; |
1052 |
int prot;
|
1053 |
int ret;
|
1054 |
|
1055 |
ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot); |
1056 |
|
1057 |
if (ret != 0) |
1058 |
return -1; |
1059 |
|
1060 |
return phys_addr;
|
1061 |
} |
1062 |
|
1063 |
/* Not really implemented. Need to figure out a sane way of doing this.
|
1064 |
Maybe add generic watchpoint support and use that. */
|
1065 |
|
1066 |
void helper_mark_exclusive(CPUState *env, uint32_t addr)
|
1067 |
{ |
1068 |
env->mmon_addr = addr; |
1069 |
} |
1070 |
|
1071 |
int helper_test_exclusive(CPUState *env, uint32_t addr)
|
1072 |
{ |
1073 |
return (env->mmon_addr != addr);
|
1074 |
} |
1075 |
|
1076 |
void helper_clrex(CPUState *env)
|
1077 |
{ |
1078 |
env->mmon_addr = -1;
|
1079 |
} |
1080 |
|
1081 |
void helper_set_cp(CPUState *env, uint32_t insn, uint32_t val)
|
1082 |
{ |
1083 |
int cp_num = (insn >> 8) & 0xf; |
1084 |
int cp_info = (insn >> 5) & 7; |
1085 |
int src = (insn >> 16) & 0xf; |
1086 |
int operand = insn & 0xf; |
1087 |
|
1088 |
if (env->cp[cp_num].cp_write)
|
1089 |
env->cp[cp_num].cp_write(env->cp[cp_num].opaque, |
1090 |
cp_info, src, operand, val); |
1091 |
} |
1092 |
|
1093 |
uint32_t helper_get_cp(CPUState *env, uint32_t insn) |
1094 |
{ |
1095 |
int cp_num = (insn >> 8) & 0xf; |
1096 |
int cp_info = (insn >> 5) & 7; |
1097 |
int dest = (insn >> 16) & 0xf; |
1098 |
int operand = insn & 0xf; |
1099 |
|
1100 |
if (env->cp[cp_num].cp_read)
|
1101 |
return env->cp[cp_num].cp_read(env->cp[cp_num].opaque,
|
1102 |
cp_info, dest, operand); |
1103 |
return 0; |
1104 |
} |
1105 |
|
1106 |
/* Return basic MPU access permission bits. */
|
1107 |
static uint32_t simple_mpu_ap_bits(uint32_t val)
|
1108 |
{ |
1109 |
uint32_t ret; |
1110 |
uint32_t mask; |
1111 |
int i;
|
1112 |
ret = 0;
|
1113 |
mask = 3;
|
1114 |
for (i = 0; i < 16; i += 2) { |
1115 |
ret |= (val >> i) & mask; |
1116 |
mask <<= 2;
|
1117 |
} |
1118 |
return ret;
|
1119 |
} |
1120 |
|
1121 |
/* Pad basic MPU access permission bits to extended format. */
|
1122 |
static uint32_t extended_mpu_ap_bits(uint32_t val)
|
1123 |
{ |
1124 |
uint32_t ret; |
1125 |
uint32_t mask; |
1126 |
int i;
|
1127 |
ret = 0;
|
1128 |
mask = 3;
|
1129 |
for (i = 0; i < 16; i += 2) { |
1130 |
ret |= (val & mask) << i; |
1131 |
mask <<= 2;
|
1132 |
} |
1133 |
return ret;
|
1134 |
} |
1135 |
|
1136 |
void helper_set_cp15(CPUState *env, uint32_t insn, uint32_t val)
|
1137 |
{ |
1138 |
int op1;
|
1139 |
int op2;
|
1140 |
int crm;
|
1141 |
|
1142 |
op1 = (insn >> 21) & 7; |
1143 |
op2 = (insn >> 5) & 7; |
1144 |
crm = insn & 0xf;
|
1145 |
switch ((insn >> 16) & 0xf) { |
1146 |
case 0: |
1147 |
if (((insn >> 21) & 7) == 2) { |
1148 |
/* ??? Select cache level. Ignore. */
|
1149 |
return;
|
1150 |
} |
1151 |
/* ID codes. */
|
1152 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1153 |
break;
|
1154 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1155 |
break;
|
1156 |
goto bad_reg;
|
1157 |
case 1: /* System configuration. */ |
1158 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1159 |
op2 = 0;
|
1160 |
switch (op2) {
|
1161 |
case 0: |
1162 |
if (!arm_feature(env, ARM_FEATURE_XSCALE) || crm == 0) |
1163 |
env->cp15.c1_sys = val; |
1164 |
/* ??? Lots of these bits are not implemented. */
|
1165 |
/* This may enable/disable the MMU, so do a TLB flush. */
|
1166 |
tlb_flush(env, 1);
|
1167 |
break;
|
1168 |
case 1: /* Auxiliary cotrol register. */ |
1169 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1170 |
env->cp15.c1_xscaleauxcr = val; |
1171 |
break;
|
1172 |
} |
1173 |
/* Not implemented. */
|
1174 |
break;
|
1175 |
case 2: |
1176 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1177 |
goto bad_reg;
|
1178 |
env->cp15.c1_coproc = val; |
1179 |
/* ??? Is this safe when called from within a TB? */
|
1180 |
tb_flush(env); |
1181 |
break;
|
1182 |
default:
|
1183 |
goto bad_reg;
|
1184 |
} |
1185 |
break;
|
1186 |
case 2: /* MMU Page table control / MPU cache control. */ |
1187 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1188 |
switch (op2) {
|
1189 |
case 0: |
1190 |
env->cp15.c2_data = val; |
1191 |
break;
|
1192 |
case 1: |
1193 |
env->cp15.c2_insn = val; |
1194 |
break;
|
1195 |
default:
|
1196 |
goto bad_reg;
|
1197 |
} |
1198 |
} else {
|
1199 |
switch (op2) {
|
1200 |
case 0: |
1201 |
env->cp15.c2_base0 = val; |
1202 |
break;
|
1203 |
case 1: |
1204 |
env->cp15.c2_base1 = val; |
1205 |
break;
|
1206 |
case 2: |
1207 |
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val);
|
1208 |
break;
|
1209 |
default:
|
1210 |
goto bad_reg;
|
1211 |
} |
1212 |
} |
1213 |
break;
|
1214 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
1215 |
env->cp15.c3 = val; |
1216 |
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */ |
1217 |
break;
|
1218 |
case 4: /* Reserved. */ |
1219 |
goto bad_reg;
|
1220 |
case 5: /* MMU Fault status / MPU access permission. */ |
1221 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1222 |
op2 = 0;
|
1223 |
switch (op2) {
|
1224 |
case 0: |
1225 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1226 |
val = extended_mpu_ap_bits(val); |
1227 |
env->cp15.c5_data = val; |
1228 |
break;
|
1229 |
case 1: |
1230 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1231 |
val = extended_mpu_ap_bits(val); |
1232 |
env->cp15.c5_insn = val; |
1233 |
break;
|
1234 |
case 2: |
1235 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1236 |
goto bad_reg;
|
1237 |
env->cp15.c5_data = val; |
1238 |
break;
|
1239 |
case 3: |
1240 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1241 |
goto bad_reg;
|
1242 |
env->cp15.c5_insn = val; |
1243 |
break;
|
1244 |
default:
|
1245 |
goto bad_reg;
|
1246 |
} |
1247 |
break;
|
1248 |
case 6: /* MMU Fault address / MPU base/size. */ |
1249 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1250 |
if (crm >= 8) |
1251 |
goto bad_reg;
|
1252 |
env->cp15.c6_region[crm] = val; |
1253 |
} else {
|
1254 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1255 |
op2 = 0;
|
1256 |
switch (op2) {
|
1257 |
case 0: |
1258 |
env->cp15.c6_data = val; |
1259 |
break;
|
1260 |
case 1: /* ??? This is WFAR on armv6 */ |
1261 |
case 2: |
1262 |
env->cp15.c6_insn = val; |
1263 |
break;
|
1264 |
default:
|
1265 |
goto bad_reg;
|
1266 |
} |
1267 |
} |
1268 |
break;
|
1269 |
case 7: /* Cache control. */ |
1270 |
env->cp15.c15_i_max = 0x000;
|
1271 |
env->cp15.c15_i_min = 0xff0;
|
1272 |
/* No cache, so nothing to do. */
|
1273 |
/* ??? MPCore has VA to PA translation functions. */
|
1274 |
break;
|
1275 |
case 8: /* MMU TLB control. */ |
1276 |
switch (op2) {
|
1277 |
case 0: /* Invalidate all. */ |
1278 |
tlb_flush(env, 0);
|
1279 |
break;
|
1280 |
case 1: /* Invalidate single TLB entry. */ |
1281 |
#if 0
|
1282 |
/* ??? This is wrong for large pages and sections. */
|
1283 |
/* As an ugly hack to make linux work we always flush a 4K
|
1284 |
pages. */
|
1285 |
val &= 0xfffff000;
|
1286 |
tlb_flush_page(env, val);
|
1287 |
tlb_flush_page(env, val + 0x400);
|
1288 |
tlb_flush_page(env, val + 0x800);
|
1289 |
tlb_flush_page(env, val + 0xc00);
|
1290 |
#else
|
1291 |
tlb_flush(env, 1);
|
1292 |
#endif
|
1293 |
break;
|
1294 |
case 2: /* Invalidate on ASID. */ |
1295 |
tlb_flush(env, val == 0);
|
1296 |
break;
|
1297 |
case 3: /* Invalidate single entry on MVA. */ |
1298 |
/* ??? This is like case 1, but ignores ASID. */
|
1299 |
tlb_flush(env, 1);
|
1300 |
break;
|
1301 |
default:
|
1302 |
goto bad_reg;
|
1303 |
} |
1304 |
break;
|
1305 |
case 9: |
1306 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1307 |
break;
|
1308 |
switch (crm) {
|
1309 |
case 0: /* Cache lockdown. */ |
1310 |
switch (op1) {
|
1311 |
case 0: /* L1 cache. */ |
1312 |
switch (op2) {
|
1313 |
case 0: |
1314 |
env->cp15.c9_data = val; |
1315 |
break;
|
1316 |
case 1: |
1317 |
env->cp15.c9_insn = val; |
1318 |
break;
|
1319 |
default:
|
1320 |
goto bad_reg;
|
1321 |
} |
1322 |
break;
|
1323 |
case 1: /* L2 cache. */ |
1324 |
/* Ignore writes to L2 lockdown/auxiliary registers. */
|
1325 |
break;
|
1326 |
default:
|
1327 |
goto bad_reg;
|
1328 |
} |
1329 |
break;
|
1330 |
case 1: /* TCM memory region registers. */ |
1331 |
/* Not implemented. */
|
1332 |
goto bad_reg;
|
1333 |
default:
|
1334 |
goto bad_reg;
|
1335 |
} |
1336 |
break;
|
1337 |
case 10: /* MMU TLB lockdown. */ |
1338 |
/* ??? TLB lockdown not implemented. */
|
1339 |
break;
|
1340 |
case 12: /* Reserved. */ |
1341 |
goto bad_reg;
|
1342 |
case 13: /* Process ID. */ |
1343 |
switch (op2) {
|
1344 |
case 0: |
1345 |
/* Unlike real hardware the qemu TLB uses virtual addresses,
|
1346 |
not modified virtual addresses, so this causes a TLB flush.
|
1347 |
*/
|
1348 |
if (env->cp15.c13_fcse != val)
|
1349 |
tlb_flush(env, 1);
|
1350 |
env->cp15.c13_fcse = val; |
1351 |
break;
|
1352 |
case 1: |
1353 |
/* This changes the ASID, so do a TLB flush. */
|
1354 |
if (env->cp15.c13_context != val
|
1355 |
&& !arm_feature(env, ARM_FEATURE_MPU)) |
1356 |
tlb_flush(env, 0);
|
1357 |
env->cp15.c13_context = val; |
1358 |
break;
|
1359 |
case 2: |
1360 |
env->cp15.c13_tls1 = val; |
1361 |
break;
|
1362 |
case 3: |
1363 |
env->cp15.c13_tls2 = val; |
1364 |
break;
|
1365 |
case 4: |
1366 |
env->cp15.c13_tls3 = val; |
1367 |
break;
|
1368 |
default:
|
1369 |
goto bad_reg;
|
1370 |
} |
1371 |
break;
|
1372 |
case 14: /* Reserved. */ |
1373 |
goto bad_reg;
|
1374 |
case 15: /* Implementation specific. */ |
1375 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1376 |
if (op2 == 0 && crm == 1) { |
1377 |
if (env->cp15.c15_cpar != (val & 0x3fff)) { |
1378 |
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
|
1379 |
tb_flush(env); |
1380 |
env->cp15.c15_cpar = val & 0x3fff;
|
1381 |
} |
1382 |
break;
|
1383 |
} |
1384 |
goto bad_reg;
|
1385 |
} |
1386 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
1387 |
switch (crm) {
|
1388 |
case 0: |
1389 |
break;
|
1390 |
case 1: /* Set TI925T configuration. */ |
1391 |
env->cp15.c15_ticonfig = val & 0xe7;
|
1392 |
env->cp15.c0_cpuid = (val & (1 << 5)) ? /* OS_TYPE bit */ |
1393 |
ARM_CPUID_TI915T : ARM_CPUID_TI925T; |
1394 |
break;
|
1395 |
case 2: /* Set I_max. */ |
1396 |
env->cp15.c15_i_max = val; |
1397 |
break;
|
1398 |
case 3: /* Set I_min. */ |
1399 |
env->cp15.c15_i_min = val; |
1400 |
break;
|
1401 |
case 4: /* Set thread-ID. */ |
1402 |
env->cp15.c15_threadid = val & 0xffff;
|
1403 |
break;
|
1404 |
case 8: /* Wait-for-interrupt (deprecated). */ |
1405 |
cpu_interrupt(env, CPU_INTERRUPT_HALT); |
1406 |
break;
|
1407 |
default:
|
1408 |
goto bad_reg;
|
1409 |
} |
1410 |
} |
1411 |
break;
|
1412 |
} |
1413 |
return;
|
1414 |
bad_reg:
|
1415 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
1416 |
cpu_abort(env, "Unimplemented cp15 register write (c%d, c%d, {%d, %d})\n",
|
1417 |
(insn >> 16) & 0xf, crm, op1, op2); |
1418 |
} |
1419 |
|
1420 |
uint32_t helper_get_cp15(CPUState *env, uint32_t insn) |
1421 |
{ |
1422 |
int op1;
|
1423 |
int op2;
|
1424 |
int crm;
|
1425 |
|
1426 |
op1 = (insn >> 21) & 7; |
1427 |
op2 = (insn >> 5) & 7; |
1428 |
crm = insn & 0xf;
|
1429 |
switch ((insn >> 16) & 0xf) { |
1430 |
case 0: /* ID codes. */ |
1431 |
switch (op1) {
|
1432 |
case 0: |
1433 |
switch (crm) {
|
1434 |
case 0: |
1435 |
switch (op2) {
|
1436 |
case 0: /* Device ID. */ |
1437 |
return env->cp15.c0_cpuid;
|
1438 |
case 1: /* Cache Type. */ |
1439 |
return env->cp15.c0_cachetype;
|
1440 |
case 2: /* TCM status. */ |
1441 |
return 0; |
1442 |
case 3: /* TLB type register. */ |
1443 |
return 0; /* No lockable TLB entries. */ |
1444 |
case 5: /* CPU ID */ |
1445 |
return env->cpu_index;
|
1446 |
default:
|
1447 |
goto bad_reg;
|
1448 |
} |
1449 |
case 1: |
1450 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
1451 |
goto bad_reg;
|
1452 |
return env->cp15.c0_c1[op2];
|
1453 |
case 2: |
1454 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
1455 |
goto bad_reg;
|
1456 |
return env->cp15.c0_c2[op2];
|
1457 |
case 3: case 4: case 5: case 6: case 7: |
1458 |
return 0; |
1459 |
default:
|
1460 |
goto bad_reg;
|
1461 |
} |
1462 |
case 1: |
1463 |
/* These registers aren't documented on arm11 cores. However
|
1464 |
Linux looks at them anyway. */
|
1465 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
1466 |
goto bad_reg;
|
1467 |
if (crm != 0) |
1468 |
goto bad_reg;
|
1469 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1470 |
goto bad_reg;
|
1471 |
return 0; |
1472 |
default:
|
1473 |
goto bad_reg;
|
1474 |
} |
1475 |
case 1: /* System configuration. */ |
1476 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1477 |
op2 = 0;
|
1478 |
switch (op2) {
|
1479 |
case 0: /* Control register. */ |
1480 |
return env->cp15.c1_sys;
|
1481 |
case 1: /* Auxiliary control register. */ |
1482 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1483 |
return env->cp15.c1_xscaleauxcr;
|
1484 |
if (!arm_feature(env, ARM_FEATURE_AUXCR))
|
1485 |
goto bad_reg;
|
1486 |
switch (ARM_CPUID(env)) {
|
1487 |
case ARM_CPUID_ARM1026:
|
1488 |
return 1; |
1489 |
case ARM_CPUID_ARM1136:
|
1490 |
return 7; |
1491 |
case ARM_CPUID_ARM11MPCORE:
|
1492 |
return 1; |
1493 |
case ARM_CPUID_CORTEXA8:
|
1494 |
return 0; |
1495 |
default:
|
1496 |
goto bad_reg;
|
1497 |
} |
1498 |
case 2: /* Coprocessor access register. */ |
1499 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1500 |
goto bad_reg;
|
1501 |
return env->cp15.c1_coproc;
|
1502 |
default:
|
1503 |
goto bad_reg;
|
1504 |
} |
1505 |
case 2: /* MMU Page table control / MPU cache control. */ |
1506 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1507 |
switch (op2) {
|
1508 |
case 0: |
1509 |
return env->cp15.c2_data;
|
1510 |
break;
|
1511 |
case 1: |
1512 |
return env->cp15.c2_insn;
|
1513 |
break;
|
1514 |
default:
|
1515 |
goto bad_reg;
|
1516 |
} |
1517 |
} else {
|
1518 |
switch (op2) {
|
1519 |
case 0: |
1520 |
return env->cp15.c2_base0;
|
1521 |
case 1: |
1522 |
return env->cp15.c2_base1;
|
1523 |
case 2: |
1524 |
{ |
1525 |
int n;
|
1526 |
uint32_t mask; |
1527 |
n = 0;
|
1528 |
mask = env->cp15.c2_mask; |
1529 |
while (mask) {
|
1530 |
n++; |
1531 |
mask <<= 1;
|
1532 |
} |
1533 |
return n;
|
1534 |
} |
1535 |
default:
|
1536 |
goto bad_reg;
|
1537 |
} |
1538 |
} |
1539 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
1540 |
return env->cp15.c3;
|
1541 |
case 4: /* Reserved. */ |
1542 |
goto bad_reg;
|
1543 |
case 5: /* MMU Fault status / MPU access permission. */ |
1544 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1545 |
op2 = 0;
|
1546 |
switch (op2) {
|
1547 |
case 0: |
1548 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1549 |
return simple_mpu_ap_bits(env->cp15.c5_data);
|
1550 |
return env->cp15.c5_data;
|
1551 |
case 1: |
1552 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1553 |
return simple_mpu_ap_bits(env->cp15.c5_data);
|
1554 |
return env->cp15.c5_insn;
|
1555 |
case 2: |
1556 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1557 |
goto bad_reg;
|
1558 |
return env->cp15.c5_data;
|
1559 |
case 3: |
1560 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1561 |
goto bad_reg;
|
1562 |
return env->cp15.c5_insn;
|
1563 |
default:
|
1564 |
goto bad_reg;
|
1565 |
} |
1566 |
case 6: /* MMU Fault address. */ |
1567 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1568 |
if (crm >= 8) |
1569 |
goto bad_reg;
|
1570 |
return env->cp15.c6_region[crm];
|
1571 |
} else {
|
1572 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1573 |
op2 = 0;
|
1574 |
switch (op2) {
|
1575 |
case 0: |
1576 |
return env->cp15.c6_data;
|
1577 |
case 1: |
1578 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
1579 |
/* Watchpoint Fault Adrress. */
|
1580 |
return 0; /* Not implemented. */ |
1581 |
} else {
|
1582 |
/* Instruction Fault Adrress. */
|
1583 |
/* Arm9 doesn't have an IFAR, but implementing it anyway
|
1584 |
shouldn't do any harm. */
|
1585 |
return env->cp15.c6_insn;
|
1586 |
} |
1587 |
case 2: |
1588 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
1589 |
/* Instruction Fault Adrress. */
|
1590 |
return env->cp15.c6_insn;
|
1591 |
} else {
|
1592 |
goto bad_reg;
|
1593 |
} |
1594 |
default:
|
1595 |
goto bad_reg;
|
1596 |
} |
1597 |
} |
1598 |
case 7: /* Cache control. */ |
1599 |
/* ??? This is for test, clean and invaidate operations that set the
|
1600 |
Z flag. We can't represent N = Z = 1, so it also clears
|
1601 |
the N flag. Oh well. */
|
1602 |
env->NZF = 0;
|
1603 |
return 0; |
1604 |
case 8: /* MMU TLB control. */ |
1605 |
goto bad_reg;
|
1606 |
case 9: /* Cache lockdown. */ |
1607 |
switch (op1) {
|
1608 |
case 0: /* L1 cache. */ |
1609 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1610 |
return 0; |
1611 |
switch (op2) {
|
1612 |
case 0: |
1613 |
return env->cp15.c9_data;
|
1614 |
case 1: |
1615 |
return env->cp15.c9_insn;
|
1616 |
default:
|
1617 |
goto bad_reg;
|
1618 |
} |
1619 |
case 1: /* L2 cache */ |
1620 |
if (crm != 0) |
1621 |
goto bad_reg;
|
1622 |
/* L2 Lockdown and Auxiliary control. */
|
1623 |
return 0; |
1624 |
default:
|
1625 |
goto bad_reg;
|
1626 |
} |
1627 |
case 10: /* MMU TLB lockdown. */ |
1628 |
/* ??? TLB lockdown not implemented. */
|
1629 |
return 0; |
1630 |
case 11: /* TCM DMA control. */ |
1631 |
case 12: /* Reserved. */ |
1632 |
goto bad_reg;
|
1633 |
case 13: /* Process ID. */ |
1634 |
switch (op2) {
|
1635 |
case 0: |
1636 |
return env->cp15.c13_fcse;
|
1637 |
case 1: |
1638 |
return env->cp15.c13_context;
|
1639 |
case 2: |
1640 |
return env->cp15.c13_tls1;
|
1641 |
case 3: |
1642 |
return env->cp15.c13_tls2;
|
1643 |
case 4: |
1644 |
return env->cp15.c13_tls3;
|
1645 |
default:
|
1646 |
goto bad_reg;
|
1647 |
} |
1648 |
case 14: /* Reserved. */ |
1649 |
goto bad_reg;
|
1650 |
case 15: /* Implementation specific. */ |
1651 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1652 |
if (op2 == 0 && crm == 1) |
1653 |
return env->cp15.c15_cpar;
|
1654 |
|
1655 |
goto bad_reg;
|
1656 |
} |
1657 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
1658 |
switch (crm) {
|
1659 |
case 0: |
1660 |
return 0; |
1661 |
case 1: /* Read TI925T configuration. */ |
1662 |
return env->cp15.c15_ticonfig;
|
1663 |
case 2: /* Read I_max. */ |
1664 |
return env->cp15.c15_i_max;
|
1665 |
case 3: /* Read I_min. */ |
1666 |
return env->cp15.c15_i_min;
|
1667 |
case 4: /* Read thread-ID. */ |
1668 |
return env->cp15.c15_threadid;
|
1669 |
case 8: /* TI925T_status */ |
1670 |
return 0; |
1671 |
} |
1672 |
goto bad_reg;
|
1673 |
} |
1674 |
return 0; |
1675 |
} |
1676 |
bad_reg:
|
1677 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
1678 |
cpu_abort(env, "Unimplemented cp15 register read (c%d, c%d, {%d, %d})\n",
|
1679 |
(insn >> 16) & 0xf, crm, op1, op2); |
1680 |
return 0; |
1681 |
} |
1682 |
|
1683 |
void helper_set_r13_banked(CPUState *env, int mode, uint32_t val) |
1684 |
{ |
1685 |
env->banked_r13[bank_number(mode)] = val; |
1686 |
} |
1687 |
|
1688 |
uint32_t helper_get_r13_banked(CPUState *env, int mode)
|
1689 |
{ |
1690 |
return env->banked_r13[bank_number(mode)];
|
1691 |
} |
1692 |
|
1693 |
uint32_t helper_v7m_mrs(CPUState *env, int reg)
|
1694 |
{ |
1695 |
switch (reg) {
|
1696 |
case 0: /* APSR */ |
1697 |
return xpsr_read(env) & 0xf8000000; |
1698 |
case 1: /* IAPSR */ |
1699 |
return xpsr_read(env) & 0xf80001ff; |
1700 |
case 2: /* EAPSR */ |
1701 |
return xpsr_read(env) & 0xff00fc00; |
1702 |
case 3: /* xPSR */ |
1703 |
return xpsr_read(env) & 0xff00fdff; |
1704 |
case 5: /* IPSR */ |
1705 |
return xpsr_read(env) & 0x000001ff; |
1706 |
case 6: /* EPSR */ |
1707 |
return xpsr_read(env) & 0x0700fc00; |
1708 |
case 7: /* IEPSR */ |
1709 |
return xpsr_read(env) & 0x0700edff; |
1710 |
case 8: /* MSP */ |
1711 |
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13]; |
1712 |
case 9: /* PSP */ |
1713 |
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp; |
1714 |
case 16: /* PRIMASK */ |
1715 |
return (env->uncached_cpsr & CPSR_I) != 0; |
1716 |
case 17: /* FAULTMASK */ |
1717 |
return (env->uncached_cpsr & CPSR_F) != 0; |
1718 |
case 18: /* BASEPRI */ |
1719 |
case 19: /* BASEPRI_MAX */ |
1720 |
return env->v7m.basepri;
|
1721 |
case 20: /* CONTROL */ |
1722 |
return env->v7m.control;
|
1723 |
default:
|
1724 |
/* ??? For debugging only. */
|
1725 |
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
|
1726 |
return 0; |
1727 |
} |
1728 |
} |
1729 |
|
1730 |
void helper_v7m_msr(CPUState *env, int reg, uint32_t val) |
1731 |
{ |
1732 |
switch (reg) {
|
1733 |
case 0: /* APSR */ |
1734 |
xpsr_write(env, val, 0xf8000000);
|
1735 |
break;
|
1736 |
case 1: /* IAPSR */ |
1737 |
xpsr_write(env, val, 0xf8000000);
|
1738 |
break;
|
1739 |
case 2: /* EAPSR */ |
1740 |
xpsr_write(env, val, 0xfe00fc00);
|
1741 |
break;
|
1742 |
case 3: /* xPSR */ |
1743 |
xpsr_write(env, val, 0xfe00fc00);
|
1744 |
break;
|
1745 |
case 5: /* IPSR */ |
1746 |
/* IPSR bits are readonly. */
|
1747 |
break;
|
1748 |
case 6: /* EPSR */ |
1749 |
xpsr_write(env, val, 0x0600fc00);
|
1750 |
break;
|
1751 |
case 7: /* IEPSR */ |
1752 |
xpsr_write(env, val, 0x0600fc00);
|
1753 |
break;
|
1754 |
case 8: /* MSP */ |
1755 |
if (env->v7m.current_sp)
|
1756 |
env->v7m.other_sp = val; |
1757 |
else
|
1758 |
env->regs[13] = val;
|
1759 |
break;
|
1760 |
case 9: /* PSP */ |
1761 |
if (env->v7m.current_sp)
|
1762 |
env->regs[13] = val;
|
1763 |
else
|
1764 |
env->v7m.other_sp = val; |
1765 |
break;
|
1766 |
case 16: /* PRIMASK */ |
1767 |
if (val & 1) |
1768 |
env->uncached_cpsr |= CPSR_I; |
1769 |
else
|
1770 |
env->uncached_cpsr &= ~CPSR_I; |
1771 |
break;
|
1772 |
case 17: /* FAULTMASK */ |
1773 |
if (val & 1) |
1774 |
env->uncached_cpsr |= CPSR_F; |
1775 |
else
|
1776 |
env->uncached_cpsr &= ~CPSR_F; |
1777 |
break;
|
1778 |
case 18: /* BASEPRI */ |
1779 |
env->v7m.basepri = val & 0xff;
|
1780 |
break;
|
1781 |
case 19: /* BASEPRI_MAX */ |
1782 |
val &= 0xff;
|
1783 |
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0)) |
1784 |
env->v7m.basepri = val; |
1785 |
break;
|
1786 |
case 20: /* CONTROL */ |
1787 |
env->v7m.control = val & 3;
|
1788 |
switch_v7m_sp(env, (val & 2) != 0); |
1789 |
break;
|
1790 |
default:
|
1791 |
/* ??? For debugging only. */
|
1792 |
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
|
1793 |
return;
|
1794 |
} |
1795 |
} |
1796 |
|
1797 |
void cpu_arm_set_cp_io(CPUARMState *env, int cpnum, |
1798 |
ARMReadCPFunc *cp_read, ARMWriteCPFunc *cp_write, |
1799 |
void *opaque)
|
1800 |
{ |
1801 |
if (cpnum < 0 || cpnum > 14) { |
1802 |
cpu_abort(env, "Bad coprocessor number: %i\n", cpnum);
|
1803 |
return;
|
1804 |
} |
1805 |
|
1806 |
env->cp[cpnum].cp_read = cp_read; |
1807 |
env->cp[cpnum].cp_write = cp_write; |
1808 |
env->cp[cpnum].opaque = opaque; |
1809 |
} |
1810 |
|
1811 |
#endif
|