root / target-arm / helper.c @ 5500b06c
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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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#include "helper.h" |
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#include "qemu-common.h" |
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#include "host-utils.h" |
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#if !defined(CONFIG_USER_ONLY)
|
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#include "hw/loader.h" |
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#endif
|
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|
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static uint32_t cortexa9_cp15_c0_c1[8] = |
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{ 0x1031, 0x11, 0x000, 0, 0x00100103, 0x20000000, 0x01230000, 0x00002111 }; |
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|
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static uint32_t cortexa9_cp15_c0_c2[8] = |
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{ 0x00101111, 0x13112111, 0x21232041, 0x11112131, 0x00111142, 0, 0, 0 }; |
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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_V4T); |
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set_feature(env, ARM_FEATURE_V5); |
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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_V4T); |
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set_feature(env, ARM_FEATURE_V5); |
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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_V4T); |
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set_feature(env, ARM_FEATURE_V5); |
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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_R2:
|
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case ARM_CPUID_ARM1136:
|
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set_feature(env, ARM_FEATURE_V4T); |
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set_feature(env, ARM_FEATURE_V5); |
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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_c2, arm1136_cp15_c0_c2, 8 * sizeof(uint32_t)); |
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env->cp15.c0_cachetype = 0x1dd20d2;
|
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env->cp15.c1_sys = 0x00050078;
|
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break;
|
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case ARM_CPUID_ARM11MPCORE:
|
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set_feature(env, ARM_FEATURE_V4T); |
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set_feature(env, ARM_FEATURE_V5); |
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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_c2, 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_V4T); |
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set_feature(env, ARM_FEATURE_V5); |
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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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set_feature(env, ARM_FEATURE_THUMB2EE); |
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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_c2, cortexa8_cp15_c0_c2, 8 * sizeof(uint32_t)); |
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env->cp15.c0_cachetype = 0x82048004;
|
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env->cp15.c0_clid = (1 << 27) | (2 << 24) | 3; |
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env->cp15.c0_ccsid[0] = 0xe007e01a; /* 16k L1 dcache. */ |
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env->cp15.c0_ccsid[1] = 0x2007e01a; /* 16k L1 icache. */ |
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env->cp15.c0_ccsid[2] = 0xf0000000; /* No L2 icache. */ |
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env->cp15.c1_sys = 0x00c50078;
|
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break;
|
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case ARM_CPUID_CORTEXA9:
|
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set_feature(env, ARM_FEATURE_V4T); |
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set_feature(env, ARM_FEATURE_V5); |
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set_feature(env, ARM_FEATURE_V6); |
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set_feature(env, ARM_FEATURE_V6K); |
132 |
set_feature(env, ARM_FEATURE_V7); |
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set_feature(env, ARM_FEATURE_AUXCR); |
134 |
set_feature(env, ARM_FEATURE_THUMB2); |
135 |
set_feature(env, ARM_FEATURE_VFP); |
136 |
set_feature(env, ARM_FEATURE_VFP3); |
137 |
set_feature(env, ARM_FEATURE_VFP_FP16); |
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set_feature(env, ARM_FEATURE_NEON); |
139 |
set_feature(env, ARM_FEATURE_THUMB2EE); |
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/* Note that A9 supports the MP extensions even for
|
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* A9UP and single-core A9MP (which are both different
|
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* and valid configurations; we don't model A9UP).
|
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*/
|
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set_feature(env, ARM_FEATURE_V7MP); |
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env->vfp.xregs[ARM_VFP_FPSID] = 0x41034000; /* Guess */ |
146 |
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222;
|
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env->vfp.xregs[ARM_VFP_MVFR1] = 0x01111111;
|
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memcpy(env->cp15.c0_c1, cortexa9_cp15_c0_c1, 8 * sizeof(uint32_t)); |
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memcpy(env->cp15.c0_c2, cortexa9_cp15_c0_c2, 8 * sizeof(uint32_t)); |
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env->cp15.c0_cachetype = 0x80038003;
|
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env->cp15.c0_clid = (1 << 27) | (1 << 24) | 3; |
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env->cp15.c0_ccsid[0] = 0xe00fe015; /* 16k L1 dcache. */ |
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env->cp15.c0_ccsid[1] = 0x200fe015; /* 16k L1 icache. */ |
154 |
env->cp15.c1_sys = 0x00c50078;
|
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break;
|
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case ARM_CPUID_CORTEXM3:
|
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set_feature(env, ARM_FEATURE_V4T); |
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set_feature(env, ARM_FEATURE_V5); |
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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); |
163 |
set_feature(env, ARM_FEATURE_DIV); |
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break;
|
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case ARM_CPUID_ANY: /* For userspace emulation. */ |
166 |
set_feature(env, ARM_FEATURE_V4T); |
167 |
set_feature(env, ARM_FEATURE_V5); |
168 |
set_feature(env, ARM_FEATURE_V6); |
169 |
set_feature(env, ARM_FEATURE_V6K); |
170 |
set_feature(env, ARM_FEATURE_V7); |
171 |
set_feature(env, ARM_FEATURE_THUMB2); |
172 |
set_feature(env, ARM_FEATURE_VFP); |
173 |
set_feature(env, ARM_FEATURE_VFP3); |
174 |
set_feature(env, ARM_FEATURE_VFP_FP16); |
175 |
set_feature(env, ARM_FEATURE_NEON); |
176 |
set_feature(env, ARM_FEATURE_THUMB2EE); |
177 |
set_feature(env, ARM_FEATURE_DIV); |
178 |
set_feature(env, ARM_FEATURE_V7MP); |
179 |
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_V4T); |
183 |
set_feature(env, ARM_FEATURE_OMAPCP); |
184 |
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;
|
187 |
env->cp15.c15_i_max = 0x000;
|
188 |
env->cp15.c15_i_min = 0xff0;
|
189 |
break;
|
190 |
case ARM_CPUID_PXA250:
|
191 |
case ARM_CPUID_PXA255:
|
192 |
case ARM_CPUID_PXA260:
|
193 |
case ARM_CPUID_PXA261:
|
194 |
case ARM_CPUID_PXA262:
|
195 |
set_feature(env, ARM_FEATURE_V4T); |
196 |
set_feature(env, ARM_FEATURE_V5); |
197 |
set_feature(env, ARM_FEATURE_XSCALE); |
198 |
/* JTAG_ID is ((id << 28) | 0x09265013) */
|
199 |
env->cp15.c0_cachetype = 0xd172172;
|
200 |
env->cp15.c1_sys = 0x00000078;
|
201 |
break;
|
202 |
case ARM_CPUID_PXA270_A0:
|
203 |
case ARM_CPUID_PXA270_A1:
|
204 |
case ARM_CPUID_PXA270_B0:
|
205 |
case ARM_CPUID_PXA270_B1:
|
206 |
case ARM_CPUID_PXA270_C0:
|
207 |
case ARM_CPUID_PXA270_C5:
|
208 |
set_feature(env, ARM_FEATURE_V4T); |
209 |
set_feature(env, ARM_FEATURE_V5); |
210 |
set_feature(env, ARM_FEATURE_XSCALE); |
211 |
/* JTAG_ID is ((id << 28) | 0x09265013) */
|
212 |
set_feature(env, ARM_FEATURE_IWMMXT); |
213 |
env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q'; |
214 |
env->cp15.c0_cachetype = 0xd172172;
|
215 |
env->cp15.c1_sys = 0x00000078;
|
216 |
break;
|
217 |
case ARM_CPUID_SA1100:
|
218 |
case ARM_CPUID_SA1110:
|
219 |
set_feature(env, ARM_FEATURE_STRONGARM); |
220 |
env->cp15.c1_sys = 0x00000070;
|
221 |
break;
|
222 |
default:
|
223 |
cpu_abort(env, "Bad CPU ID: %x\n", id);
|
224 |
break;
|
225 |
} |
226 |
} |
227 |
|
228 |
void cpu_reset(CPUARMState *env)
|
229 |
{ |
230 |
uint32_t id; |
231 |
|
232 |
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
|
233 |
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
|
234 |
log_cpu_state(env, 0);
|
235 |
} |
236 |
|
237 |
id = env->cp15.c0_cpuid; |
238 |
memset(env, 0, offsetof(CPUARMState, breakpoints));
|
239 |
if (id)
|
240 |
cpu_reset_model_id(env, id); |
241 |
#if defined (CONFIG_USER_ONLY)
|
242 |
env->uncached_cpsr = ARM_CPU_MODE_USR; |
243 |
/* For user mode we must enable access to coprocessors */
|
244 |
env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30; |
245 |
if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
|
246 |
env->cp15.c15_cpar = 3;
|
247 |
} else if (arm_feature(env, ARM_FEATURE_XSCALE)) { |
248 |
env->cp15.c15_cpar = 1;
|
249 |
} |
250 |
#else
|
251 |
/* SVC mode with interrupts disabled. */
|
252 |
env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I; |
253 |
/* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is
|
254 |
clear at reset. Initial SP and PC are loaded from ROM. */
|
255 |
if (IS_M(env)) {
|
256 |
uint32_t pc; |
257 |
uint8_t *rom; |
258 |
env->uncached_cpsr &= ~CPSR_I; |
259 |
rom = rom_ptr(0);
|
260 |
if (rom) {
|
261 |
/* We should really use ldl_phys here, in case the guest
|
262 |
modified flash and reset itself. However images
|
263 |
loaded via -kenrel have not been copied yet, so load the
|
264 |
values directly from there. */
|
265 |
env->regs[13] = ldl_p(rom);
|
266 |
pc = ldl_p(rom + 4);
|
267 |
env->thumb = pc & 1;
|
268 |
env->regs[15] = pc & ~1; |
269 |
} |
270 |
} |
271 |
env->vfp.xregs[ARM_VFP_FPEXC] = 0;
|
272 |
env->cp15.c2_base_mask = 0xffffc000u;
|
273 |
#endif
|
274 |
set_flush_to_zero(1, &env->vfp.standard_fp_status);
|
275 |
set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status);
|
276 |
set_default_nan_mode(1, &env->vfp.standard_fp_status);
|
277 |
set_float_detect_tininess(float_tininess_before_rounding, |
278 |
&env->vfp.fp_status); |
279 |
set_float_detect_tininess(float_tininess_before_rounding, |
280 |
&env->vfp.standard_fp_status); |
281 |
tlb_flush(env, 1);
|
282 |
} |
283 |
|
284 |
static int vfp_gdb_get_reg(CPUState *env, uint8_t *buf, int reg) |
285 |
{ |
286 |
int nregs;
|
287 |
|
288 |
/* VFP data registers are always little-endian. */
|
289 |
nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16; |
290 |
if (reg < nregs) {
|
291 |
stfq_le_p(buf, env->vfp.regs[reg]); |
292 |
return 8; |
293 |
} |
294 |
if (arm_feature(env, ARM_FEATURE_NEON)) {
|
295 |
/* Aliases for Q regs. */
|
296 |
nregs += 16;
|
297 |
if (reg < nregs) {
|
298 |
stfq_le_p(buf, env->vfp.regs[(reg - 32) * 2]); |
299 |
stfq_le_p(buf + 8, env->vfp.regs[(reg - 32) * 2 + 1]); |
300 |
return 16; |
301 |
} |
302 |
} |
303 |
switch (reg - nregs) {
|
304 |
case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4; |
305 |
case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4; |
306 |
case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4; |
307 |
} |
308 |
return 0; |
309 |
} |
310 |
|
311 |
static int vfp_gdb_set_reg(CPUState *env, uint8_t *buf, int reg) |
312 |
{ |
313 |
int nregs;
|
314 |
|
315 |
nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16; |
316 |
if (reg < nregs) {
|
317 |
env->vfp.regs[reg] = ldfq_le_p(buf); |
318 |
return 8; |
319 |
} |
320 |
if (arm_feature(env, ARM_FEATURE_NEON)) {
|
321 |
nregs += 16;
|
322 |
if (reg < nregs) {
|
323 |
env->vfp.regs[(reg - 32) * 2] = ldfq_le_p(buf); |
324 |
env->vfp.regs[(reg - 32) * 2 + 1] = ldfq_le_p(buf + 8); |
325 |
return 16; |
326 |
} |
327 |
} |
328 |
switch (reg - nregs) {
|
329 |
case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4; |
330 |
case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4; |
331 |
case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4; |
332 |
} |
333 |
return 0; |
334 |
} |
335 |
|
336 |
CPUARMState *cpu_arm_init(const char *cpu_model) |
337 |
{ |
338 |
CPUARMState *env; |
339 |
uint32_t id; |
340 |
static int inited = 0; |
341 |
|
342 |
id = cpu_arm_find_by_name(cpu_model); |
343 |
if (id == 0) |
344 |
return NULL; |
345 |
env = qemu_mallocz(sizeof(CPUARMState));
|
346 |
cpu_exec_init(env); |
347 |
if (!inited) {
|
348 |
inited = 1;
|
349 |
arm_translate_init(); |
350 |
} |
351 |
|
352 |
env->cpu_model_str = cpu_model; |
353 |
env->cp15.c0_cpuid = id; |
354 |
cpu_reset(env); |
355 |
if (arm_feature(env, ARM_FEATURE_NEON)) {
|
356 |
gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg, |
357 |
51, "arm-neon.xml", 0); |
358 |
} else if (arm_feature(env, ARM_FEATURE_VFP3)) { |
359 |
gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg, |
360 |
35, "arm-vfp3.xml", 0); |
361 |
} else if (arm_feature(env, ARM_FEATURE_VFP)) { |
362 |
gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg, |
363 |
19, "arm-vfp.xml", 0); |
364 |
} |
365 |
qemu_init_vcpu(env); |
366 |
return env;
|
367 |
} |
368 |
|
369 |
struct arm_cpu_t {
|
370 |
uint32_t id; |
371 |
const char *name; |
372 |
}; |
373 |
|
374 |
static const struct arm_cpu_t arm_cpu_names[] = { |
375 |
{ ARM_CPUID_ARM926, "arm926"},
|
376 |
{ ARM_CPUID_ARM946, "arm946"},
|
377 |
{ ARM_CPUID_ARM1026, "arm1026"},
|
378 |
{ ARM_CPUID_ARM1136, "arm1136"},
|
379 |
{ ARM_CPUID_ARM1136_R2, "arm1136-r2"},
|
380 |
{ ARM_CPUID_ARM11MPCORE, "arm11mpcore"},
|
381 |
{ ARM_CPUID_CORTEXM3, "cortex-m3"},
|
382 |
{ ARM_CPUID_CORTEXA8, "cortex-a8"},
|
383 |
{ ARM_CPUID_CORTEXA9, "cortex-a9"},
|
384 |
{ ARM_CPUID_TI925T, "ti925t" },
|
385 |
{ ARM_CPUID_PXA250, "pxa250" },
|
386 |
{ ARM_CPUID_SA1100, "sa1100" },
|
387 |
{ ARM_CPUID_SA1110, "sa1110" },
|
388 |
{ ARM_CPUID_PXA255, "pxa255" },
|
389 |
{ ARM_CPUID_PXA260, "pxa260" },
|
390 |
{ ARM_CPUID_PXA261, "pxa261" },
|
391 |
{ ARM_CPUID_PXA262, "pxa262" },
|
392 |
{ ARM_CPUID_PXA270, "pxa270" },
|
393 |
{ ARM_CPUID_PXA270_A0, "pxa270-a0" },
|
394 |
{ ARM_CPUID_PXA270_A1, "pxa270-a1" },
|
395 |
{ ARM_CPUID_PXA270_B0, "pxa270-b0" },
|
396 |
{ ARM_CPUID_PXA270_B1, "pxa270-b1" },
|
397 |
{ ARM_CPUID_PXA270_C0, "pxa270-c0" },
|
398 |
{ ARM_CPUID_PXA270_C5, "pxa270-c5" },
|
399 |
{ ARM_CPUID_ANY, "any"},
|
400 |
{ 0, NULL} |
401 |
}; |
402 |
|
403 |
void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
|
404 |
{ |
405 |
int i;
|
406 |
|
407 |
(*cpu_fprintf)(f, "Available CPUs:\n");
|
408 |
for (i = 0; arm_cpu_names[i].name; i++) { |
409 |
(*cpu_fprintf)(f, " %s\n", arm_cpu_names[i].name);
|
410 |
} |
411 |
} |
412 |
|
413 |
/* return 0 if not found */
|
414 |
static uint32_t cpu_arm_find_by_name(const char *name) |
415 |
{ |
416 |
int i;
|
417 |
uint32_t id; |
418 |
|
419 |
id = 0;
|
420 |
for (i = 0; arm_cpu_names[i].name; i++) { |
421 |
if (strcmp(name, arm_cpu_names[i].name) == 0) { |
422 |
id = arm_cpu_names[i].id; |
423 |
break;
|
424 |
} |
425 |
} |
426 |
return id;
|
427 |
} |
428 |
|
429 |
void cpu_arm_close(CPUARMState *env)
|
430 |
{ |
431 |
free(env); |
432 |
} |
433 |
|
434 |
uint32_t cpsr_read(CPUARMState *env) |
435 |
{ |
436 |
int ZF;
|
437 |
ZF = (env->ZF == 0);
|
438 |
return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) | |
439 |
(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27) |
440 |
| (env->thumb << 5) | ((env->condexec_bits & 3) << 25) |
441 |
| ((env->condexec_bits & 0xfc) << 8) |
442 |
| (env->GE << 16);
|
443 |
} |
444 |
|
445 |
void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
|
446 |
{ |
447 |
if (mask & CPSR_NZCV) {
|
448 |
env->ZF = (~val) & CPSR_Z; |
449 |
env->NF = val; |
450 |
env->CF = (val >> 29) & 1; |
451 |
env->VF = (val << 3) & 0x80000000; |
452 |
} |
453 |
if (mask & CPSR_Q)
|
454 |
env->QF = ((val & CPSR_Q) != 0);
|
455 |
if (mask & CPSR_T)
|
456 |
env->thumb = ((val & CPSR_T) != 0);
|
457 |
if (mask & CPSR_IT_0_1) {
|
458 |
env->condexec_bits &= ~3;
|
459 |
env->condexec_bits |= (val >> 25) & 3; |
460 |
} |
461 |
if (mask & CPSR_IT_2_7) {
|
462 |
env->condexec_bits &= 3;
|
463 |
env->condexec_bits |= (val >> 8) & 0xfc; |
464 |
} |
465 |
if (mask & CPSR_GE) {
|
466 |
env->GE = (val >> 16) & 0xf; |
467 |
} |
468 |
|
469 |
if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
|
470 |
switch_mode(env, val & CPSR_M); |
471 |
} |
472 |
mask &= ~CACHED_CPSR_BITS; |
473 |
env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask); |
474 |
} |
475 |
|
476 |
/* Sign/zero extend */
|
477 |
uint32_t HELPER(sxtb16)(uint32_t x) |
478 |
{ |
479 |
uint32_t res; |
480 |
res = (uint16_t)(int8_t)x; |
481 |
res |= (uint32_t)(int8_t)(x >> 16) << 16; |
482 |
return res;
|
483 |
} |
484 |
|
485 |
uint32_t HELPER(uxtb16)(uint32_t x) |
486 |
{ |
487 |
uint32_t res; |
488 |
res = (uint16_t)(uint8_t)x; |
489 |
res |= (uint32_t)(uint8_t)(x >> 16) << 16; |
490 |
return res;
|
491 |
} |
492 |
|
493 |
uint32_t HELPER(clz)(uint32_t x) |
494 |
{ |
495 |
return clz32(x);
|
496 |
} |
497 |
|
498 |
int32_t HELPER(sdiv)(int32_t num, int32_t den) |
499 |
{ |
500 |
if (den == 0) |
501 |
return 0; |
502 |
if (num == INT_MIN && den == -1) |
503 |
return INT_MIN;
|
504 |
return num / den;
|
505 |
} |
506 |
|
507 |
uint32_t HELPER(udiv)(uint32_t num, uint32_t den) |
508 |
{ |
509 |
if (den == 0) |
510 |
return 0; |
511 |
return num / den;
|
512 |
} |
513 |
|
514 |
uint32_t HELPER(rbit)(uint32_t x) |
515 |
{ |
516 |
x = ((x & 0xff000000) >> 24) |
517 |
| ((x & 0x00ff0000) >> 8) |
518 |
| ((x & 0x0000ff00) << 8) |
519 |
| ((x & 0x000000ff) << 24); |
520 |
x = ((x & 0xf0f0f0f0) >> 4) |
521 |
| ((x & 0x0f0f0f0f) << 4); |
522 |
x = ((x & 0x88888888) >> 3) |
523 |
| ((x & 0x44444444) >> 1) |
524 |
| ((x & 0x22222222) << 1) |
525 |
| ((x & 0x11111111) << 3); |
526 |
return x;
|
527 |
} |
528 |
|
529 |
uint32_t HELPER(abs)(uint32_t x) |
530 |
{ |
531 |
return ((int32_t)x < 0) ? -x : x; |
532 |
} |
533 |
|
534 |
#if defined(CONFIG_USER_ONLY)
|
535 |
|
536 |
void do_interrupt (CPUState *env)
|
537 |
{ |
538 |
env->exception_index = -1;
|
539 |
} |
540 |
|
541 |
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw, |
542 |
int mmu_idx, int is_softmmu) |
543 |
{ |
544 |
if (rw == 2) { |
545 |
env->exception_index = EXCP_PREFETCH_ABORT; |
546 |
env->cp15.c6_insn = address; |
547 |
} else {
|
548 |
env->exception_index = EXCP_DATA_ABORT; |
549 |
env->cp15.c6_data = address; |
550 |
} |
551 |
return 1; |
552 |
} |
553 |
|
554 |
/* These should probably raise undefined insn exceptions. */
|
555 |
void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
|
556 |
{ |
557 |
int op1 = (insn >> 8) & 0xf; |
558 |
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
|
559 |
return;
|
560 |
} |
561 |
|
562 |
uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn) |
563 |
{ |
564 |
int op1 = (insn >> 8) & 0xf; |
565 |
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
|
566 |
return 0; |
567 |
} |
568 |
|
569 |
void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
|
570 |
{ |
571 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
572 |
} |
573 |
|
574 |
uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) |
575 |
{ |
576 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
577 |
} |
578 |
|
579 |
/* These should probably raise undefined insn exceptions. */
|
580 |
void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
|
581 |
{ |
582 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
583 |
} |
584 |
|
585 |
uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg) |
586 |
{ |
587 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
588 |
return 0; |
589 |
} |
590 |
|
591 |
void switch_mode(CPUState *env, int mode) |
592 |
{ |
593 |
if (mode != ARM_CPU_MODE_USR)
|
594 |
cpu_abort(env, "Tried to switch out of user mode\n");
|
595 |
} |
596 |
|
597 |
void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
|
598 |
{ |
599 |
cpu_abort(env, "banked r13 write\n");
|
600 |
} |
601 |
|
602 |
uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode) |
603 |
{ |
604 |
cpu_abort(env, "banked r13 read\n");
|
605 |
return 0; |
606 |
} |
607 |
|
608 |
#else
|
609 |
|
610 |
extern int semihosting_enabled; |
611 |
|
612 |
/* Map CPU modes onto saved register banks. */
|
613 |
static inline int bank_number (int mode) |
614 |
{ |
615 |
switch (mode) {
|
616 |
case ARM_CPU_MODE_USR:
|
617 |
case ARM_CPU_MODE_SYS:
|
618 |
return 0; |
619 |
case ARM_CPU_MODE_SVC:
|
620 |
return 1; |
621 |
case ARM_CPU_MODE_ABT:
|
622 |
return 2; |
623 |
case ARM_CPU_MODE_UND:
|
624 |
return 3; |
625 |
case ARM_CPU_MODE_IRQ:
|
626 |
return 4; |
627 |
case ARM_CPU_MODE_FIQ:
|
628 |
return 5; |
629 |
} |
630 |
cpu_abort(cpu_single_env, "Bad mode %x\n", mode);
|
631 |
return -1; |
632 |
} |
633 |
|
634 |
void switch_mode(CPUState *env, int mode) |
635 |
{ |
636 |
int old_mode;
|
637 |
int i;
|
638 |
|
639 |
old_mode = env->uncached_cpsr & CPSR_M; |
640 |
if (mode == old_mode)
|
641 |
return;
|
642 |
|
643 |
if (old_mode == ARM_CPU_MODE_FIQ) {
|
644 |
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
645 |
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); |
646 |
} else if (mode == ARM_CPU_MODE_FIQ) { |
647 |
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
648 |
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); |
649 |
} |
650 |
|
651 |
i = bank_number(old_mode); |
652 |
env->banked_r13[i] = env->regs[13];
|
653 |
env->banked_r14[i] = env->regs[14];
|
654 |
env->banked_spsr[i] = env->spsr; |
655 |
|
656 |
i = bank_number(mode); |
657 |
env->regs[13] = env->banked_r13[i];
|
658 |
env->regs[14] = env->banked_r14[i];
|
659 |
env->spsr = env->banked_spsr[i]; |
660 |
} |
661 |
|
662 |
static void v7m_push(CPUARMState *env, uint32_t val) |
663 |
{ |
664 |
env->regs[13] -= 4; |
665 |
stl_phys(env->regs[13], val);
|
666 |
} |
667 |
|
668 |
static uint32_t v7m_pop(CPUARMState *env)
|
669 |
{ |
670 |
uint32_t val; |
671 |
val = ldl_phys(env->regs[13]);
|
672 |
env->regs[13] += 4; |
673 |
return val;
|
674 |
} |
675 |
|
676 |
/* Switch to V7M main or process stack pointer. */
|
677 |
static void switch_v7m_sp(CPUARMState *env, int process) |
678 |
{ |
679 |
uint32_t tmp; |
680 |
if (env->v7m.current_sp != process) {
|
681 |
tmp = env->v7m.other_sp; |
682 |
env->v7m.other_sp = env->regs[13];
|
683 |
env->regs[13] = tmp;
|
684 |
env->v7m.current_sp = process; |
685 |
} |
686 |
} |
687 |
|
688 |
static void do_v7m_exception_exit(CPUARMState *env) |
689 |
{ |
690 |
uint32_t type; |
691 |
uint32_t xpsr; |
692 |
|
693 |
type = env->regs[15];
|
694 |
if (env->v7m.exception != 0) |
695 |
armv7m_nvic_complete_irq(env->nvic, env->v7m.exception); |
696 |
|
697 |
/* Switch to the target stack. */
|
698 |
switch_v7m_sp(env, (type & 4) != 0); |
699 |
/* Pop registers. */
|
700 |
env->regs[0] = v7m_pop(env);
|
701 |
env->regs[1] = v7m_pop(env);
|
702 |
env->regs[2] = v7m_pop(env);
|
703 |
env->regs[3] = v7m_pop(env);
|
704 |
env->regs[12] = v7m_pop(env);
|
705 |
env->regs[14] = v7m_pop(env);
|
706 |
env->regs[15] = v7m_pop(env);
|
707 |
xpsr = v7m_pop(env); |
708 |
xpsr_write(env, xpsr, 0xfffffdff);
|
709 |
/* Undo stack alignment. */
|
710 |
if (xpsr & 0x200) |
711 |
env->regs[13] |= 4; |
712 |
/* ??? The exception return type specifies Thread/Handler mode. However
|
713 |
this is also implied by the xPSR value. Not sure what to do
|
714 |
if there is a mismatch. */
|
715 |
/* ??? Likewise for mismatches between the CONTROL register and the stack
|
716 |
pointer. */
|
717 |
} |
718 |
|
719 |
static void do_interrupt_v7m(CPUARMState *env) |
720 |
{ |
721 |
uint32_t xpsr = xpsr_read(env); |
722 |
uint32_t lr; |
723 |
uint32_t addr; |
724 |
|
725 |
lr = 0xfffffff1;
|
726 |
if (env->v7m.current_sp)
|
727 |
lr |= 4;
|
728 |
if (env->v7m.exception == 0) |
729 |
lr |= 8;
|
730 |
|
731 |
/* For exceptions we just mark as pending on the NVIC, and let that
|
732 |
handle it. */
|
733 |
/* TODO: Need to escalate if the current priority is higher than the
|
734 |
one we're raising. */
|
735 |
switch (env->exception_index) {
|
736 |
case EXCP_UDEF:
|
737 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE); |
738 |
return;
|
739 |
case EXCP_SWI:
|
740 |
env->regs[15] += 2; |
741 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC); |
742 |
return;
|
743 |
case EXCP_PREFETCH_ABORT:
|
744 |
case EXCP_DATA_ABORT:
|
745 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM); |
746 |
return;
|
747 |
case EXCP_BKPT:
|
748 |
if (semihosting_enabled) {
|
749 |
int nr;
|
750 |
nr = lduw_code(env->regs[15]) & 0xff; |
751 |
if (nr == 0xab) { |
752 |
env->regs[15] += 2; |
753 |
env->regs[0] = do_arm_semihosting(env);
|
754 |
return;
|
755 |
} |
756 |
} |
757 |
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG); |
758 |
return;
|
759 |
case EXCP_IRQ:
|
760 |
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic); |
761 |
break;
|
762 |
case EXCP_EXCEPTION_EXIT:
|
763 |
do_v7m_exception_exit(env); |
764 |
return;
|
765 |
default:
|
766 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
767 |
return; /* Never happens. Keep compiler happy. */ |
768 |
} |
769 |
|
770 |
/* Align stack pointer. */
|
771 |
/* ??? Should only do this if Configuration Control Register
|
772 |
STACKALIGN bit is set. */
|
773 |
if (env->regs[13] & 4) { |
774 |
env->regs[13] -= 4; |
775 |
xpsr |= 0x200;
|
776 |
} |
777 |
/* Switch to the handler mode. */
|
778 |
v7m_push(env, xpsr); |
779 |
v7m_push(env, env->regs[15]);
|
780 |
v7m_push(env, env->regs[14]);
|
781 |
v7m_push(env, env->regs[12]);
|
782 |
v7m_push(env, env->regs[3]);
|
783 |
v7m_push(env, env->regs[2]);
|
784 |
v7m_push(env, env->regs[1]);
|
785 |
v7m_push(env, env->regs[0]);
|
786 |
switch_v7m_sp(env, 0);
|
787 |
env->uncached_cpsr &= ~CPSR_IT; |
788 |
env->regs[14] = lr;
|
789 |
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
|
790 |
env->regs[15] = addr & 0xfffffffe; |
791 |
env->thumb = addr & 1;
|
792 |
} |
793 |
|
794 |
/* Handle a CPU exception. */
|
795 |
void do_interrupt(CPUARMState *env)
|
796 |
{ |
797 |
uint32_t addr; |
798 |
uint32_t mask; |
799 |
int new_mode;
|
800 |
uint32_t offset; |
801 |
|
802 |
if (IS_M(env)) {
|
803 |
do_interrupt_v7m(env); |
804 |
return;
|
805 |
} |
806 |
/* TODO: Vectored interrupt controller. */
|
807 |
switch (env->exception_index) {
|
808 |
case EXCP_UDEF:
|
809 |
new_mode = ARM_CPU_MODE_UND; |
810 |
addr = 0x04;
|
811 |
mask = CPSR_I; |
812 |
if (env->thumb)
|
813 |
offset = 2;
|
814 |
else
|
815 |
offset = 4;
|
816 |
break;
|
817 |
case EXCP_SWI:
|
818 |
if (semihosting_enabled) {
|
819 |
/* Check for semihosting interrupt. */
|
820 |
if (env->thumb) {
|
821 |
mask = lduw_code(env->regs[15] - 2) & 0xff; |
822 |
} else {
|
823 |
mask = ldl_code(env->regs[15] - 4) & 0xffffff; |
824 |
} |
825 |
/* Only intercept calls from privileged modes, to provide some
|
826 |
semblance of security. */
|
827 |
if (((mask == 0x123456 && !env->thumb) |
828 |
|| (mask == 0xab && env->thumb))
|
829 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { |
830 |
env->regs[0] = do_arm_semihosting(env);
|
831 |
return;
|
832 |
} |
833 |
} |
834 |
new_mode = ARM_CPU_MODE_SVC; |
835 |
addr = 0x08;
|
836 |
mask = CPSR_I; |
837 |
/* The PC already points to the next instruction. */
|
838 |
offset = 0;
|
839 |
break;
|
840 |
case EXCP_BKPT:
|
841 |
/* See if this is a semihosting syscall. */
|
842 |
if (env->thumb && semihosting_enabled) {
|
843 |
mask = lduw_code(env->regs[15]) & 0xff; |
844 |
if (mask == 0xab |
845 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { |
846 |
env->regs[15] += 2; |
847 |
env->regs[0] = do_arm_semihosting(env);
|
848 |
return;
|
849 |
} |
850 |
} |
851 |
/* Fall through to prefetch abort. */
|
852 |
case EXCP_PREFETCH_ABORT:
|
853 |
new_mode = ARM_CPU_MODE_ABT; |
854 |
addr = 0x0c;
|
855 |
mask = CPSR_A | CPSR_I; |
856 |
offset = 4;
|
857 |
break;
|
858 |
case EXCP_DATA_ABORT:
|
859 |
new_mode = ARM_CPU_MODE_ABT; |
860 |
addr = 0x10;
|
861 |
mask = CPSR_A | CPSR_I; |
862 |
offset = 8;
|
863 |
break;
|
864 |
case EXCP_IRQ:
|
865 |
new_mode = ARM_CPU_MODE_IRQ; |
866 |
addr = 0x18;
|
867 |
/* Disable IRQ and imprecise data aborts. */
|
868 |
mask = CPSR_A | CPSR_I; |
869 |
offset = 4;
|
870 |
break;
|
871 |
case EXCP_FIQ:
|
872 |
new_mode = ARM_CPU_MODE_FIQ; |
873 |
addr = 0x1c;
|
874 |
/* Disable FIQ, IRQ and imprecise data aborts. */
|
875 |
mask = CPSR_A | CPSR_I | CPSR_F; |
876 |
offset = 4;
|
877 |
break;
|
878 |
default:
|
879 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
880 |
return; /* Never happens. Keep compiler happy. */ |
881 |
} |
882 |
/* High vectors. */
|
883 |
if (env->cp15.c1_sys & (1 << 13)) { |
884 |
addr += 0xffff0000;
|
885 |
} |
886 |
switch_mode (env, new_mode); |
887 |
env->spsr = cpsr_read(env); |
888 |
/* Clear IT bits. */
|
889 |
env->condexec_bits = 0;
|
890 |
/* Switch to the new mode, and to the correct instruction set. */
|
891 |
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode; |
892 |
env->uncached_cpsr |= mask; |
893 |
/* this is a lie, as the was no c1_sys on V4T/V5, but who cares
|
894 |
* and we should just guard the thumb mode on V4 */
|
895 |
if (arm_feature(env, ARM_FEATURE_V4T)) {
|
896 |
env->thumb = (env->cp15.c1_sys & (1 << 30)) != 0; |
897 |
} |
898 |
env->regs[14] = env->regs[15] + offset; |
899 |
env->regs[15] = addr;
|
900 |
env->interrupt_request |= CPU_INTERRUPT_EXITTB; |
901 |
} |
902 |
|
903 |
/* Check section/page access permissions.
|
904 |
Returns the page protection flags, or zero if the access is not
|
905 |
permitted. */
|
906 |
static inline int check_ap(CPUState *env, int ap, int domain, int access_type, |
907 |
int is_user)
|
908 |
{ |
909 |
int prot_ro;
|
910 |
|
911 |
if (domain == 3) |
912 |
return PAGE_READ | PAGE_WRITE;
|
913 |
|
914 |
if (access_type == 1) |
915 |
prot_ro = 0;
|
916 |
else
|
917 |
prot_ro = PAGE_READ; |
918 |
|
919 |
switch (ap) {
|
920 |
case 0: |
921 |
if (access_type == 1) |
922 |
return 0; |
923 |
switch ((env->cp15.c1_sys >> 8) & 3) { |
924 |
case 1: |
925 |
return is_user ? 0 : PAGE_READ; |
926 |
case 2: |
927 |
return PAGE_READ;
|
928 |
default:
|
929 |
return 0; |
930 |
} |
931 |
case 1: |
932 |
return is_user ? 0 : PAGE_READ | PAGE_WRITE; |
933 |
case 2: |
934 |
if (is_user)
|
935 |
return prot_ro;
|
936 |
else
|
937 |
return PAGE_READ | PAGE_WRITE;
|
938 |
case 3: |
939 |
return PAGE_READ | PAGE_WRITE;
|
940 |
case 4: /* Reserved. */ |
941 |
return 0; |
942 |
case 5: |
943 |
return is_user ? 0 : prot_ro; |
944 |
case 6: |
945 |
return prot_ro;
|
946 |
case 7: |
947 |
if (!arm_feature (env, ARM_FEATURE_V7))
|
948 |
return 0; |
949 |
return prot_ro;
|
950 |
default:
|
951 |
abort(); |
952 |
} |
953 |
} |
954 |
|
955 |
static uint32_t get_level1_table_address(CPUState *env, uint32_t address)
|
956 |
{ |
957 |
uint32_t table; |
958 |
|
959 |
if (address & env->cp15.c2_mask)
|
960 |
table = env->cp15.c2_base1 & 0xffffc000;
|
961 |
else
|
962 |
table = env->cp15.c2_base0 & env->cp15.c2_base_mask; |
963 |
|
964 |
table |= (address >> 18) & 0x3ffc; |
965 |
return table;
|
966 |
} |
967 |
|
968 |
static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type, |
969 |
int is_user, uint32_t *phys_ptr, int *prot, |
970 |
target_ulong *page_size) |
971 |
{ |
972 |
int code;
|
973 |
uint32_t table; |
974 |
uint32_t desc; |
975 |
int type;
|
976 |
int ap;
|
977 |
int domain;
|
978 |
uint32_t phys_addr; |
979 |
|
980 |
/* Pagetable walk. */
|
981 |
/* Lookup l1 descriptor. */
|
982 |
table = get_level1_table_address(env, address); |
983 |
desc = ldl_phys(table); |
984 |
type = (desc & 3);
|
985 |
domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3; |
986 |
if (type == 0) { |
987 |
/* Section translation fault. */
|
988 |
code = 5;
|
989 |
goto do_fault;
|
990 |
} |
991 |
if (domain == 0 || domain == 2) { |
992 |
if (type == 2) |
993 |
code = 9; /* Section domain fault. */ |
994 |
else
|
995 |
code = 11; /* Page domain fault. */ |
996 |
goto do_fault;
|
997 |
} |
998 |
if (type == 2) { |
999 |
/* 1Mb section. */
|
1000 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
1001 |
ap = (desc >> 10) & 3; |
1002 |
code = 13;
|
1003 |
*page_size = 1024 * 1024; |
1004 |
} else {
|
1005 |
/* Lookup l2 entry. */
|
1006 |
if (type == 1) { |
1007 |
/* Coarse pagetable. */
|
1008 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
1009 |
} else {
|
1010 |
/* Fine pagetable. */
|
1011 |
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc); |
1012 |
} |
1013 |
desc = ldl_phys(table); |
1014 |
switch (desc & 3) { |
1015 |
case 0: /* Page translation fault. */ |
1016 |
code = 7;
|
1017 |
goto do_fault;
|
1018 |
case 1: /* 64k page. */ |
1019 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
1020 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
1021 |
*page_size = 0x10000;
|
1022 |
break;
|
1023 |
case 2: /* 4k page. */ |
1024 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
1025 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
1026 |
*page_size = 0x1000;
|
1027 |
break;
|
1028 |
case 3: /* 1k page. */ |
1029 |
if (type == 1) { |
1030 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1031 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
1032 |
} else {
|
1033 |
/* Page translation fault. */
|
1034 |
code = 7;
|
1035 |
goto do_fault;
|
1036 |
} |
1037 |
} else {
|
1038 |
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff); |
1039 |
} |
1040 |
ap = (desc >> 4) & 3; |
1041 |
*page_size = 0x400;
|
1042 |
break;
|
1043 |
default:
|
1044 |
/* Never happens, but compiler isn't smart enough to tell. */
|
1045 |
abort(); |
1046 |
} |
1047 |
code = 15;
|
1048 |
} |
1049 |
*prot = check_ap(env, ap, domain, access_type, is_user); |
1050 |
if (!*prot) {
|
1051 |
/* Access permission fault. */
|
1052 |
goto do_fault;
|
1053 |
} |
1054 |
*prot |= PAGE_EXEC; |
1055 |
*phys_ptr = phys_addr; |
1056 |
return 0; |
1057 |
do_fault:
|
1058 |
return code | (domain << 4); |
1059 |
} |
1060 |
|
1061 |
static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type, |
1062 |
int is_user, uint32_t *phys_ptr, int *prot, |
1063 |
target_ulong *page_size) |
1064 |
{ |
1065 |
int code;
|
1066 |
uint32_t table; |
1067 |
uint32_t desc; |
1068 |
uint32_t xn; |
1069 |
int type;
|
1070 |
int ap;
|
1071 |
int domain;
|
1072 |
uint32_t phys_addr; |
1073 |
|
1074 |
/* Pagetable walk. */
|
1075 |
/* Lookup l1 descriptor. */
|
1076 |
table = get_level1_table_address(env, address); |
1077 |
desc = ldl_phys(table); |
1078 |
type = (desc & 3);
|
1079 |
if (type == 0) { |
1080 |
/* Section translation fault. */
|
1081 |
code = 5;
|
1082 |
domain = 0;
|
1083 |
goto do_fault;
|
1084 |
} else if (type == 2 && (desc & (1 << 18))) { |
1085 |
/* Supersection. */
|
1086 |
domain = 0;
|
1087 |
} else {
|
1088 |
/* Section or page. */
|
1089 |
domain = (desc >> 4) & 0x1e; |
1090 |
} |
1091 |
domain = (env->cp15.c3 >> domain) & 3;
|
1092 |
if (domain == 0 || domain == 2) { |
1093 |
if (type == 2) |
1094 |
code = 9; /* Section domain fault. */ |
1095 |
else
|
1096 |
code = 11; /* Page domain fault. */ |
1097 |
goto do_fault;
|
1098 |
} |
1099 |
if (type == 2) { |
1100 |
if (desc & (1 << 18)) { |
1101 |
/* Supersection. */
|
1102 |
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff); |
1103 |
*page_size = 0x1000000;
|
1104 |
} else {
|
1105 |
/* Section. */
|
1106 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
1107 |
*page_size = 0x100000;
|
1108 |
} |
1109 |
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4); |
1110 |
xn = desc & (1 << 4); |
1111 |
code = 13;
|
1112 |
} else {
|
1113 |
/* Lookup l2 entry. */
|
1114 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
1115 |
desc = ldl_phys(table); |
1116 |
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4); |
1117 |
switch (desc & 3) { |
1118 |
case 0: /* Page translation fault. */ |
1119 |
code = 7;
|
1120 |
goto do_fault;
|
1121 |
case 1: /* 64k page. */ |
1122 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
1123 |
xn = desc & (1 << 15); |
1124 |
*page_size = 0x10000;
|
1125 |
break;
|
1126 |
case 2: case 3: /* 4k page. */ |
1127 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
1128 |
xn = desc & 1;
|
1129 |
*page_size = 0x1000;
|
1130 |
break;
|
1131 |
default:
|
1132 |
/* Never happens, but compiler isn't smart enough to tell. */
|
1133 |
abort(); |
1134 |
} |
1135 |
code = 15;
|
1136 |
} |
1137 |
if (domain == 3) { |
1138 |
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
1139 |
} else {
|
1140 |
if (xn && access_type == 2) |
1141 |
goto do_fault;
|
1142 |
|
1143 |
/* The simplified model uses AP[0] as an access control bit. */
|
1144 |
if ((env->cp15.c1_sys & (1 << 29)) && (ap & 1) == 0) { |
1145 |
/* Access flag fault. */
|
1146 |
code = (code == 15) ? 6 : 3; |
1147 |
goto do_fault;
|
1148 |
} |
1149 |
*prot = check_ap(env, ap, domain, access_type, is_user); |
1150 |
if (!*prot) {
|
1151 |
/* Access permission fault. */
|
1152 |
goto do_fault;
|
1153 |
} |
1154 |
if (!xn) {
|
1155 |
*prot |= PAGE_EXEC; |
1156 |
} |
1157 |
} |
1158 |
*phys_ptr = phys_addr; |
1159 |
return 0; |
1160 |
do_fault:
|
1161 |
return code | (domain << 4); |
1162 |
} |
1163 |
|
1164 |
static int get_phys_addr_mpu(CPUState *env, uint32_t address, int access_type, |
1165 |
int is_user, uint32_t *phys_ptr, int *prot) |
1166 |
{ |
1167 |
int n;
|
1168 |
uint32_t mask; |
1169 |
uint32_t base; |
1170 |
|
1171 |
*phys_ptr = address; |
1172 |
for (n = 7; n >= 0; n--) { |
1173 |
base = env->cp15.c6_region[n]; |
1174 |
if ((base & 1) == 0) |
1175 |
continue;
|
1176 |
mask = 1 << ((base >> 1) & 0x1f); |
1177 |
/* Keep this shift separate from the above to avoid an
|
1178 |
(undefined) << 32. */
|
1179 |
mask = (mask << 1) - 1; |
1180 |
if (((base ^ address) & ~mask) == 0) |
1181 |
break;
|
1182 |
} |
1183 |
if (n < 0) |
1184 |
return 2; |
1185 |
|
1186 |
if (access_type == 2) { |
1187 |
mask = env->cp15.c5_insn; |
1188 |
} else {
|
1189 |
mask = env->cp15.c5_data; |
1190 |
} |
1191 |
mask = (mask >> (n * 4)) & 0xf; |
1192 |
switch (mask) {
|
1193 |
case 0: |
1194 |
return 1; |
1195 |
case 1: |
1196 |
if (is_user)
|
1197 |
return 1; |
1198 |
*prot = PAGE_READ | PAGE_WRITE; |
1199 |
break;
|
1200 |
case 2: |
1201 |
*prot = PAGE_READ; |
1202 |
if (!is_user)
|
1203 |
*prot |= PAGE_WRITE; |
1204 |
break;
|
1205 |
case 3: |
1206 |
*prot = PAGE_READ | PAGE_WRITE; |
1207 |
break;
|
1208 |
case 5: |
1209 |
if (is_user)
|
1210 |
return 1; |
1211 |
*prot = PAGE_READ; |
1212 |
break;
|
1213 |
case 6: |
1214 |
*prot = PAGE_READ; |
1215 |
break;
|
1216 |
default:
|
1217 |
/* Bad permission. */
|
1218 |
return 1; |
1219 |
} |
1220 |
*prot |= PAGE_EXEC; |
1221 |
return 0; |
1222 |
} |
1223 |
|
1224 |
static inline int get_phys_addr(CPUState *env, uint32_t address, |
1225 |
int access_type, int is_user, |
1226 |
uint32_t *phys_ptr, int *prot,
|
1227 |
target_ulong *page_size) |
1228 |
{ |
1229 |
/* Fast Context Switch Extension. */
|
1230 |
if (address < 0x02000000) |
1231 |
address += env->cp15.c13_fcse; |
1232 |
|
1233 |
if ((env->cp15.c1_sys & 1) == 0) { |
1234 |
/* MMU/MPU disabled. */
|
1235 |
*phys_ptr = address; |
1236 |
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
1237 |
*page_size = TARGET_PAGE_SIZE; |
1238 |
return 0; |
1239 |
} else if (arm_feature(env, ARM_FEATURE_MPU)) { |
1240 |
*page_size = TARGET_PAGE_SIZE; |
1241 |
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
|
1242 |
prot); |
1243 |
} else if (env->cp15.c1_sys & (1 << 23)) { |
1244 |
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
|
1245 |
prot, page_size); |
1246 |
} else {
|
1247 |
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
|
1248 |
prot, page_size); |
1249 |
} |
1250 |
} |
1251 |
|
1252 |
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address,
|
1253 |
int access_type, int mmu_idx, int is_softmmu) |
1254 |
{ |
1255 |
uint32_t phys_addr; |
1256 |
target_ulong page_size; |
1257 |
int prot;
|
1258 |
int ret, is_user;
|
1259 |
|
1260 |
is_user = mmu_idx == MMU_USER_IDX; |
1261 |
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot, |
1262 |
&page_size); |
1263 |
if (ret == 0) { |
1264 |
/* Map a single [sub]page. */
|
1265 |
phys_addr &= ~(uint32_t)0x3ff;
|
1266 |
address &= ~(uint32_t)0x3ff;
|
1267 |
tlb_set_page (env, address, phys_addr, prot, mmu_idx, page_size); |
1268 |
return 0; |
1269 |
} |
1270 |
|
1271 |
if (access_type == 2) { |
1272 |
env->cp15.c5_insn = ret; |
1273 |
env->cp15.c6_insn = address; |
1274 |
env->exception_index = EXCP_PREFETCH_ABORT; |
1275 |
} else {
|
1276 |
env->cp15.c5_data = ret; |
1277 |
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) |
1278 |
env->cp15.c5_data |= (1 << 11); |
1279 |
env->cp15.c6_data = address; |
1280 |
env->exception_index = EXCP_DATA_ABORT; |
1281 |
} |
1282 |
return 1; |
1283 |
} |
1284 |
|
1285 |
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
1286 |
{ |
1287 |
uint32_t phys_addr; |
1288 |
target_ulong page_size; |
1289 |
int prot;
|
1290 |
int ret;
|
1291 |
|
1292 |
ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot, &page_size); |
1293 |
|
1294 |
if (ret != 0) |
1295 |
return -1; |
1296 |
|
1297 |
return phys_addr;
|
1298 |
} |
1299 |
|
1300 |
void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
|
1301 |
{ |
1302 |
int cp_num = (insn >> 8) & 0xf; |
1303 |
int cp_info = (insn >> 5) & 7; |
1304 |
int src = (insn >> 16) & 0xf; |
1305 |
int operand = insn & 0xf; |
1306 |
|
1307 |
if (env->cp[cp_num].cp_write)
|
1308 |
env->cp[cp_num].cp_write(env->cp[cp_num].opaque, |
1309 |
cp_info, src, operand, val); |
1310 |
} |
1311 |
|
1312 |
uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn) |
1313 |
{ |
1314 |
int cp_num = (insn >> 8) & 0xf; |
1315 |
int cp_info = (insn >> 5) & 7; |
1316 |
int dest = (insn >> 16) & 0xf; |
1317 |
int operand = insn & 0xf; |
1318 |
|
1319 |
if (env->cp[cp_num].cp_read)
|
1320 |
return env->cp[cp_num].cp_read(env->cp[cp_num].opaque,
|
1321 |
cp_info, dest, operand); |
1322 |
return 0; |
1323 |
} |
1324 |
|
1325 |
/* Return basic MPU access permission bits. */
|
1326 |
static uint32_t simple_mpu_ap_bits(uint32_t val)
|
1327 |
{ |
1328 |
uint32_t ret; |
1329 |
uint32_t mask; |
1330 |
int i;
|
1331 |
ret = 0;
|
1332 |
mask = 3;
|
1333 |
for (i = 0; i < 16; i += 2) { |
1334 |
ret |= (val >> i) & mask; |
1335 |
mask <<= 2;
|
1336 |
} |
1337 |
return ret;
|
1338 |
} |
1339 |
|
1340 |
/* Pad basic MPU access permission bits to extended format. */
|
1341 |
static uint32_t extended_mpu_ap_bits(uint32_t val)
|
1342 |
{ |
1343 |
uint32_t ret; |
1344 |
uint32_t mask; |
1345 |
int i;
|
1346 |
ret = 0;
|
1347 |
mask = 3;
|
1348 |
for (i = 0; i < 16; i += 2) { |
1349 |
ret |= (val & mask) << i; |
1350 |
mask <<= 2;
|
1351 |
} |
1352 |
return ret;
|
1353 |
} |
1354 |
|
1355 |
void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
|
1356 |
{ |
1357 |
int op1;
|
1358 |
int op2;
|
1359 |
int crm;
|
1360 |
|
1361 |
op1 = (insn >> 21) & 7; |
1362 |
op2 = (insn >> 5) & 7; |
1363 |
crm = insn & 0xf;
|
1364 |
switch ((insn >> 16) & 0xf) { |
1365 |
case 0: |
1366 |
/* ID codes. */
|
1367 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1368 |
break;
|
1369 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1370 |
break;
|
1371 |
if (arm_feature(env, ARM_FEATURE_V7)
|
1372 |
&& op1 == 2 && crm == 0 && op2 == 0) { |
1373 |
env->cp15.c0_cssel = val & 0xf;
|
1374 |
break;
|
1375 |
} |
1376 |
goto bad_reg;
|
1377 |
case 1: /* System configuration. */ |
1378 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1379 |
op2 = 0;
|
1380 |
switch (op2) {
|
1381 |
case 0: |
1382 |
if (!arm_feature(env, ARM_FEATURE_XSCALE) || crm == 0) |
1383 |
env->cp15.c1_sys = val; |
1384 |
/* ??? Lots of these bits are not implemented. */
|
1385 |
/* This may enable/disable the MMU, so do a TLB flush. */
|
1386 |
tlb_flush(env, 1);
|
1387 |
break;
|
1388 |
case 1: /* Auxiliary control register. */ |
1389 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1390 |
env->cp15.c1_xscaleauxcr = val; |
1391 |
break;
|
1392 |
} |
1393 |
/* Not implemented. */
|
1394 |
break;
|
1395 |
case 2: |
1396 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1397 |
goto bad_reg;
|
1398 |
if (env->cp15.c1_coproc != val) {
|
1399 |
env->cp15.c1_coproc = val; |
1400 |
/* ??? Is this safe when called from within a TB? */
|
1401 |
tb_flush(env); |
1402 |
} |
1403 |
break;
|
1404 |
default:
|
1405 |
goto bad_reg;
|
1406 |
} |
1407 |
break;
|
1408 |
case 2: /* MMU Page table control / MPU cache control. */ |
1409 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1410 |
switch (op2) {
|
1411 |
case 0: |
1412 |
env->cp15.c2_data = val; |
1413 |
break;
|
1414 |
case 1: |
1415 |
env->cp15.c2_insn = val; |
1416 |
break;
|
1417 |
default:
|
1418 |
goto bad_reg;
|
1419 |
} |
1420 |
} else {
|
1421 |
switch (op2) {
|
1422 |
case 0: |
1423 |
env->cp15.c2_base0 = val; |
1424 |
break;
|
1425 |
case 1: |
1426 |
env->cp15.c2_base1 = val; |
1427 |
break;
|
1428 |
case 2: |
1429 |
val &= 7;
|
1430 |
env->cp15.c2_control = val; |
1431 |
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val);
|
1432 |
env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> val);
|
1433 |
break;
|
1434 |
default:
|
1435 |
goto bad_reg;
|
1436 |
} |
1437 |
} |
1438 |
break;
|
1439 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
1440 |
env->cp15.c3 = val; |
1441 |
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */ |
1442 |
break;
|
1443 |
case 4: /* Reserved. */ |
1444 |
goto bad_reg;
|
1445 |
case 5: /* MMU Fault status / MPU access permission. */ |
1446 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1447 |
op2 = 0;
|
1448 |
switch (op2) {
|
1449 |
case 0: |
1450 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1451 |
val = extended_mpu_ap_bits(val); |
1452 |
env->cp15.c5_data = val; |
1453 |
break;
|
1454 |
case 1: |
1455 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1456 |
val = extended_mpu_ap_bits(val); |
1457 |
env->cp15.c5_insn = val; |
1458 |
break;
|
1459 |
case 2: |
1460 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1461 |
goto bad_reg;
|
1462 |
env->cp15.c5_data = val; |
1463 |
break;
|
1464 |
case 3: |
1465 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1466 |
goto bad_reg;
|
1467 |
env->cp15.c5_insn = val; |
1468 |
break;
|
1469 |
default:
|
1470 |
goto bad_reg;
|
1471 |
} |
1472 |
break;
|
1473 |
case 6: /* MMU Fault address / MPU base/size. */ |
1474 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1475 |
if (crm >= 8) |
1476 |
goto bad_reg;
|
1477 |
env->cp15.c6_region[crm] = val; |
1478 |
} else {
|
1479 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1480 |
op2 = 0;
|
1481 |
switch (op2) {
|
1482 |
case 0: |
1483 |
env->cp15.c6_data = val; |
1484 |
break;
|
1485 |
case 1: /* ??? This is WFAR on armv6 */ |
1486 |
case 2: |
1487 |
env->cp15.c6_insn = val; |
1488 |
break;
|
1489 |
default:
|
1490 |
goto bad_reg;
|
1491 |
} |
1492 |
} |
1493 |
break;
|
1494 |
case 7: /* Cache control. */ |
1495 |
env->cp15.c15_i_max = 0x000;
|
1496 |
env->cp15.c15_i_min = 0xff0;
|
1497 |
if (op1 != 0) { |
1498 |
goto bad_reg;
|
1499 |
} |
1500 |
/* No cache, so nothing to do except VA->PA translations. */
|
1501 |
if (arm_feature(env, ARM_FEATURE_V6K)) {
|
1502 |
switch (crm) {
|
1503 |
case 4: |
1504 |
if (arm_feature(env, ARM_FEATURE_V7)) {
|
1505 |
env->cp15.c7_par = val & 0xfffff6ff;
|
1506 |
} else {
|
1507 |
env->cp15.c7_par = val & 0xfffff1ff;
|
1508 |
} |
1509 |
break;
|
1510 |
case 8: { |
1511 |
uint32_t phys_addr; |
1512 |
target_ulong page_size; |
1513 |
int prot;
|
1514 |
int ret, is_user = op2 & 2; |
1515 |
int access_type = op2 & 1; |
1516 |
|
1517 |
if (op2 & 4) { |
1518 |
/* Other states are only available with TrustZone */
|
1519 |
goto bad_reg;
|
1520 |
} |
1521 |
ret = get_phys_addr(env, val, access_type, is_user, |
1522 |
&phys_addr, &prot, &page_size); |
1523 |
if (ret == 0) { |
1524 |
/* We do not set any attribute bits in the PAR */
|
1525 |
if (page_size == (1 << 24) |
1526 |
&& arm_feature(env, ARM_FEATURE_V7)) { |
1527 |
env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1; |
1528 |
} else {
|
1529 |
env->cp15.c7_par = phys_addr & 0xfffff000;
|
1530 |
} |
1531 |
} else {
|
1532 |
env->cp15.c7_par = ((ret & (10 << 1)) >> 5) | |
1533 |
((ret & (12 << 1)) >> 6) | |
1534 |
((ret & 0xf) << 1) | 1; |
1535 |
} |
1536 |
break;
|
1537 |
} |
1538 |
} |
1539 |
} |
1540 |
break;
|
1541 |
case 8: /* MMU TLB control. */ |
1542 |
switch (op2) {
|
1543 |
case 0: /* Invalidate all. */ |
1544 |
tlb_flush(env, 0);
|
1545 |
break;
|
1546 |
case 1: /* Invalidate single TLB entry. */ |
1547 |
tlb_flush_page(env, val & TARGET_PAGE_MASK); |
1548 |
break;
|
1549 |
case 2: /* Invalidate on ASID. */ |
1550 |
tlb_flush(env, val == 0);
|
1551 |
break;
|
1552 |
case 3: /* Invalidate single entry on MVA. */ |
1553 |
/* ??? This is like case 1, but ignores ASID. */
|
1554 |
tlb_flush(env, 1);
|
1555 |
break;
|
1556 |
default:
|
1557 |
goto bad_reg;
|
1558 |
} |
1559 |
break;
|
1560 |
case 9: |
1561 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1562 |
break;
|
1563 |
if (arm_feature(env, ARM_FEATURE_STRONGARM))
|
1564 |
break; /* Ignore ReadBuffer access */ |
1565 |
switch (crm) {
|
1566 |
case 0: /* Cache lockdown. */ |
1567 |
switch (op1) {
|
1568 |
case 0: /* L1 cache. */ |
1569 |
switch (op2) {
|
1570 |
case 0: |
1571 |
env->cp15.c9_data = val; |
1572 |
break;
|
1573 |
case 1: |
1574 |
env->cp15.c9_insn = val; |
1575 |
break;
|
1576 |
default:
|
1577 |
goto bad_reg;
|
1578 |
} |
1579 |
break;
|
1580 |
case 1: /* L2 cache. */ |
1581 |
/* Ignore writes to L2 lockdown/auxiliary registers. */
|
1582 |
break;
|
1583 |
default:
|
1584 |
goto bad_reg;
|
1585 |
} |
1586 |
break;
|
1587 |
case 1: /* TCM memory region registers. */ |
1588 |
/* Not implemented. */
|
1589 |
goto bad_reg;
|
1590 |
default:
|
1591 |
goto bad_reg;
|
1592 |
} |
1593 |
break;
|
1594 |
case 10: /* MMU TLB lockdown. */ |
1595 |
/* ??? TLB lockdown not implemented. */
|
1596 |
break;
|
1597 |
case 12: /* Reserved. */ |
1598 |
goto bad_reg;
|
1599 |
case 13: /* Process ID. */ |
1600 |
switch (op2) {
|
1601 |
case 0: |
1602 |
/* Unlike real hardware the qemu TLB uses virtual addresses,
|
1603 |
not modified virtual addresses, so this causes a TLB flush.
|
1604 |
*/
|
1605 |
if (env->cp15.c13_fcse != val)
|
1606 |
tlb_flush(env, 1);
|
1607 |
env->cp15.c13_fcse = val; |
1608 |
break;
|
1609 |
case 1: |
1610 |
/* This changes the ASID, so do a TLB flush. */
|
1611 |
if (env->cp15.c13_context != val
|
1612 |
&& !arm_feature(env, ARM_FEATURE_MPU)) |
1613 |
tlb_flush(env, 0);
|
1614 |
env->cp15.c13_context = val; |
1615 |
break;
|
1616 |
default:
|
1617 |
goto bad_reg;
|
1618 |
} |
1619 |
break;
|
1620 |
case 14: /* Reserved. */ |
1621 |
goto bad_reg;
|
1622 |
case 15: /* Implementation specific. */ |
1623 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1624 |
if (op2 == 0 && crm == 1) { |
1625 |
if (env->cp15.c15_cpar != (val & 0x3fff)) { |
1626 |
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
|
1627 |
tb_flush(env); |
1628 |
env->cp15.c15_cpar = val & 0x3fff;
|
1629 |
} |
1630 |
break;
|
1631 |
} |
1632 |
goto bad_reg;
|
1633 |
} |
1634 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
1635 |
switch (crm) {
|
1636 |
case 0: |
1637 |
break;
|
1638 |
case 1: /* Set TI925T configuration. */ |
1639 |
env->cp15.c15_ticonfig = val & 0xe7;
|
1640 |
env->cp15.c0_cpuid = (val & (1 << 5)) ? /* OS_TYPE bit */ |
1641 |
ARM_CPUID_TI915T : ARM_CPUID_TI925T; |
1642 |
break;
|
1643 |
case 2: /* Set I_max. */ |
1644 |
env->cp15.c15_i_max = val; |
1645 |
break;
|
1646 |
case 3: /* Set I_min. */ |
1647 |
env->cp15.c15_i_min = val; |
1648 |
break;
|
1649 |
case 4: /* Set thread-ID. */ |
1650 |
env->cp15.c15_threadid = val & 0xffff;
|
1651 |
break;
|
1652 |
case 8: /* Wait-for-interrupt (deprecated). */ |
1653 |
cpu_interrupt(env, CPU_INTERRUPT_HALT); |
1654 |
break;
|
1655 |
default:
|
1656 |
goto bad_reg;
|
1657 |
} |
1658 |
} |
1659 |
break;
|
1660 |
} |
1661 |
return;
|
1662 |
bad_reg:
|
1663 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
1664 |
cpu_abort(env, "Unimplemented cp15 register write (c%d, c%d, {%d, %d})\n",
|
1665 |
(insn >> 16) & 0xf, crm, op1, op2); |
1666 |
} |
1667 |
|
1668 |
uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) |
1669 |
{ |
1670 |
int op1;
|
1671 |
int op2;
|
1672 |
int crm;
|
1673 |
|
1674 |
op1 = (insn >> 21) & 7; |
1675 |
op2 = (insn >> 5) & 7; |
1676 |
crm = insn & 0xf;
|
1677 |
switch ((insn >> 16) & 0xf) { |
1678 |
case 0: /* ID codes. */ |
1679 |
switch (op1) {
|
1680 |
case 0: |
1681 |
switch (crm) {
|
1682 |
case 0: |
1683 |
switch (op2) {
|
1684 |
case 0: /* Device ID. */ |
1685 |
return env->cp15.c0_cpuid;
|
1686 |
case 1: /* Cache Type. */ |
1687 |
return env->cp15.c0_cachetype;
|
1688 |
case 2: /* TCM status. */ |
1689 |
return 0; |
1690 |
case 3: /* TLB type register. */ |
1691 |
return 0; /* No lockable TLB entries. */ |
1692 |
case 5: /* MPIDR */ |
1693 |
/* The MPIDR was standardised in v7; prior to
|
1694 |
* this it was implemented only in the 11MPCore.
|
1695 |
* For all other pre-v7 cores it does not exist.
|
1696 |
*/
|
1697 |
if (arm_feature(env, ARM_FEATURE_V7) ||
|
1698 |
ARM_CPUID(env) == ARM_CPUID_ARM11MPCORE) { |
1699 |
int mpidr = env->cpu_index;
|
1700 |
/* We don't support setting cluster ID ([8..11])
|
1701 |
* so these bits always RAZ.
|
1702 |
*/
|
1703 |
if (arm_feature(env, ARM_FEATURE_V7MP)) {
|
1704 |
mpidr |= (1 << 31); |
1705 |
/* Cores which are uniprocessor (non-coherent)
|
1706 |
* but still implement the MP extensions set
|
1707 |
* bit 30. (For instance, A9UP.) However we do
|
1708 |
* not currently model any of those cores.
|
1709 |
*/
|
1710 |
} |
1711 |
return mpidr;
|
1712 |
} |
1713 |
/* otherwise fall through to the unimplemented-reg case */
|
1714 |
default:
|
1715 |
goto bad_reg;
|
1716 |
} |
1717 |
case 1: |
1718 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
1719 |
goto bad_reg;
|
1720 |
return env->cp15.c0_c1[op2];
|
1721 |
case 2: |
1722 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
1723 |
goto bad_reg;
|
1724 |
return env->cp15.c0_c2[op2];
|
1725 |
case 3: case 4: case 5: case 6: case 7: |
1726 |
return 0; |
1727 |
default:
|
1728 |
goto bad_reg;
|
1729 |
} |
1730 |
case 1: |
1731 |
/* These registers aren't documented on arm11 cores. However
|
1732 |
Linux looks at them anyway. */
|
1733 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
1734 |
goto bad_reg;
|
1735 |
if (crm != 0) |
1736 |
goto bad_reg;
|
1737 |
if (!arm_feature(env, ARM_FEATURE_V7))
|
1738 |
return 0; |
1739 |
|
1740 |
switch (op2) {
|
1741 |
case 0: |
1742 |
return env->cp15.c0_ccsid[env->cp15.c0_cssel];
|
1743 |
case 1: |
1744 |
return env->cp15.c0_clid;
|
1745 |
case 7: |
1746 |
return 0; |
1747 |
} |
1748 |
goto bad_reg;
|
1749 |
case 2: |
1750 |
if (op2 != 0 || crm != 0) |
1751 |
goto bad_reg;
|
1752 |
return env->cp15.c0_cssel;
|
1753 |
default:
|
1754 |
goto bad_reg;
|
1755 |
} |
1756 |
case 1: /* System configuration. */ |
1757 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1758 |
op2 = 0;
|
1759 |
switch (op2) {
|
1760 |
case 0: /* Control register. */ |
1761 |
return env->cp15.c1_sys;
|
1762 |
case 1: /* Auxiliary control register. */ |
1763 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1764 |
return env->cp15.c1_xscaleauxcr;
|
1765 |
if (!arm_feature(env, ARM_FEATURE_AUXCR))
|
1766 |
goto bad_reg;
|
1767 |
switch (ARM_CPUID(env)) {
|
1768 |
case ARM_CPUID_ARM1026:
|
1769 |
return 1; |
1770 |
case ARM_CPUID_ARM1136:
|
1771 |
case ARM_CPUID_ARM1136_R2:
|
1772 |
return 7; |
1773 |
case ARM_CPUID_ARM11MPCORE:
|
1774 |
return 1; |
1775 |
case ARM_CPUID_CORTEXA8:
|
1776 |
return 2; |
1777 |
case ARM_CPUID_CORTEXA9:
|
1778 |
return 0; |
1779 |
default:
|
1780 |
goto bad_reg;
|
1781 |
} |
1782 |
case 2: /* Coprocessor access register. */ |
1783 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1784 |
goto bad_reg;
|
1785 |
return env->cp15.c1_coproc;
|
1786 |
default:
|
1787 |
goto bad_reg;
|
1788 |
} |
1789 |
case 2: /* MMU Page table control / MPU cache control. */ |
1790 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1791 |
switch (op2) {
|
1792 |
case 0: |
1793 |
return env->cp15.c2_data;
|
1794 |
break;
|
1795 |
case 1: |
1796 |
return env->cp15.c2_insn;
|
1797 |
break;
|
1798 |
default:
|
1799 |
goto bad_reg;
|
1800 |
} |
1801 |
} else {
|
1802 |
switch (op2) {
|
1803 |
case 0: |
1804 |
return env->cp15.c2_base0;
|
1805 |
case 1: |
1806 |
return env->cp15.c2_base1;
|
1807 |
case 2: |
1808 |
return env->cp15.c2_control;
|
1809 |
default:
|
1810 |
goto bad_reg;
|
1811 |
} |
1812 |
} |
1813 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
1814 |
return env->cp15.c3;
|
1815 |
case 4: /* Reserved. */ |
1816 |
goto bad_reg;
|
1817 |
case 5: /* MMU Fault status / MPU access permission. */ |
1818 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1819 |
op2 = 0;
|
1820 |
switch (op2) {
|
1821 |
case 0: |
1822 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1823 |
return simple_mpu_ap_bits(env->cp15.c5_data);
|
1824 |
return env->cp15.c5_data;
|
1825 |
case 1: |
1826 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1827 |
return simple_mpu_ap_bits(env->cp15.c5_data);
|
1828 |
return env->cp15.c5_insn;
|
1829 |
case 2: |
1830 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1831 |
goto bad_reg;
|
1832 |
return env->cp15.c5_data;
|
1833 |
case 3: |
1834 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1835 |
goto bad_reg;
|
1836 |
return env->cp15.c5_insn;
|
1837 |
default:
|
1838 |
goto bad_reg;
|
1839 |
} |
1840 |
case 6: /* MMU Fault address. */ |
1841 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1842 |
if (crm >= 8) |
1843 |
goto bad_reg;
|
1844 |
return env->cp15.c6_region[crm];
|
1845 |
} else {
|
1846 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1847 |
op2 = 0;
|
1848 |
switch (op2) {
|
1849 |
case 0: |
1850 |
return env->cp15.c6_data;
|
1851 |
case 1: |
1852 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
1853 |
/* Watchpoint Fault Adrress. */
|
1854 |
return 0; /* Not implemented. */ |
1855 |
} else {
|
1856 |
/* Instruction Fault Adrress. */
|
1857 |
/* Arm9 doesn't have an IFAR, but implementing it anyway
|
1858 |
shouldn't do any harm. */
|
1859 |
return env->cp15.c6_insn;
|
1860 |
} |
1861 |
case 2: |
1862 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
1863 |
/* Instruction Fault Adrress. */
|
1864 |
return env->cp15.c6_insn;
|
1865 |
} else {
|
1866 |
goto bad_reg;
|
1867 |
} |
1868 |
default:
|
1869 |
goto bad_reg;
|
1870 |
} |
1871 |
} |
1872 |
case 7: /* Cache control. */ |
1873 |
if (crm == 4 && op1 == 0 && op2 == 0) { |
1874 |
return env->cp15.c7_par;
|
1875 |
} |
1876 |
/* FIXME: Should only clear Z flag if destination is r15. */
|
1877 |
env->ZF = 0;
|
1878 |
return 0; |
1879 |
case 8: /* MMU TLB control. */ |
1880 |
goto bad_reg;
|
1881 |
case 9: /* Cache lockdown. */ |
1882 |
switch (op1) {
|
1883 |
case 0: /* L1 cache. */ |
1884 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1885 |
return 0; |
1886 |
switch (op2) {
|
1887 |
case 0: |
1888 |
return env->cp15.c9_data;
|
1889 |
case 1: |
1890 |
return env->cp15.c9_insn;
|
1891 |
default:
|
1892 |
goto bad_reg;
|
1893 |
} |
1894 |
case 1: /* L2 cache */ |
1895 |
if (crm != 0) |
1896 |
goto bad_reg;
|
1897 |
/* L2 Lockdown and Auxiliary control. */
|
1898 |
return 0; |
1899 |
default:
|
1900 |
goto bad_reg;
|
1901 |
} |
1902 |
case 10: /* MMU TLB lockdown. */ |
1903 |
/* ??? TLB lockdown not implemented. */
|
1904 |
return 0; |
1905 |
case 11: /* TCM DMA control. */ |
1906 |
case 12: /* Reserved. */ |
1907 |
goto bad_reg;
|
1908 |
case 13: /* Process ID. */ |
1909 |
switch (op2) {
|
1910 |
case 0: |
1911 |
return env->cp15.c13_fcse;
|
1912 |
case 1: |
1913 |
return env->cp15.c13_context;
|
1914 |
default:
|
1915 |
goto bad_reg;
|
1916 |
} |
1917 |
case 14: /* Reserved. */ |
1918 |
goto bad_reg;
|
1919 |
case 15: /* Implementation specific. */ |
1920 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1921 |
if (op2 == 0 && crm == 1) |
1922 |
return env->cp15.c15_cpar;
|
1923 |
|
1924 |
goto bad_reg;
|
1925 |
} |
1926 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
1927 |
switch (crm) {
|
1928 |
case 0: |
1929 |
return 0; |
1930 |
case 1: /* Read TI925T configuration. */ |
1931 |
return env->cp15.c15_ticonfig;
|
1932 |
case 2: /* Read I_max. */ |
1933 |
return env->cp15.c15_i_max;
|
1934 |
case 3: /* Read I_min. */ |
1935 |
return env->cp15.c15_i_min;
|
1936 |
case 4: /* Read thread-ID. */ |
1937 |
return env->cp15.c15_threadid;
|
1938 |
case 8: /* TI925T_status */ |
1939 |
return 0; |
1940 |
} |
1941 |
/* TODO: Peripheral port remap register:
|
1942 |
* On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt
|
1943 |
* controller base address at $rn & ~0xfff and map size of
|
1944 |
* 0x200 << ($rn & 0xfff), when MMU is off. */
|
1945 |
goto bad_reg;
|
1946 |
} |
1947 |
return 0; |
1948 |
} |
1949 |
bad_reg:
|
1950 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
1951 |
cpu_abort(env, "Unimplemented cp15 register read (c%d, c%d, {%d, %d})\n",
|
1952 |
(insn >> 16) & 0xf, crm, op1, op2); |
1953 |
return 0; |
1954 |
} |
1955 |
|
1956 |
void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
|
1957 |
{ |
1958 |
if ((env->uncached_cpsr & CPSR_M) == mode) {
|
1959 |
env->regs[13] = val;
|
1960 |
} else {
|
1961 |
env->banked_r13[bank_number(mode)] = val; |
1962 |
} |
1963 |
} |
1964 |
|
1965 |
uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode) |
1966 |
{ |
1967 |
if ((env->uncached_cpsr & CPSR_M) == mode) {
|
1968 |
return env->regs[13]; |
1969 |
} else {
|
1970 |
return env->banked_r13[bank_number(mode)];
|
1971 |
} |
1972 |
} |
1973 |
|
1974 |
uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg) |
1975 |
{ |
1976 |
switch (reg) {
|
1977 |
case 0: /* APSR */ |
1978 |
return xpsr_read(env) & 0xf8000000; |
1979 |
case 1: /* IAPSR */ |
1980 |
return xpsr_read(env) & 0xf80001ff; |
1981 |
case 2: /* EAPSR */ |
1982 |
return xpsr_read(env) & 0xff00fc00; |
1983 |
case 3: /* xPSR */ |
1984 |
return xpsr_read(env) & 0xff00fdff; |
1985 |
case 5: /* IPSR */ |
1986 |
return xpsr_read(env) & 0x000001ff; |
1987 |
case 6: /* EPSR */ |
1988 |
return xpsr_read(env) & 0x0700fc00; |
1989 |
case 7: /* IEPSR */ |
1990 |
return xpsr_read(env) & 0x0700edff; |
1991 |
case 8: /* MSP */ |
1992 |
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13]; |
1993 |
case 9: /* PSP */ |
1994 |
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp; |
1995 |
case 16: /* PRIMASK */ |
1996 |
return (env->uncached_cpsr & CPSR_I) != 0; |
1997 |
case 17: /* FAULTMASK */ |
1998 |
return (env->uncached_cpsr & CPSR_F) != 0; |
1999 |
case 18: /* BASEPRI */ |
2000 |
case 19: /* BASEPRI_MAX */ |
2001 |
return env->v7m.basepri;
|
2002 |
case 20: /* CONTROL */ |
2003 |
return env->v7m.control;
|
2004 |
default:
|
2005 |
/* ??? For debugging only. */
|
2006 |
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
|
2007 |
return 0; |
2008 |
} |
2009 |
} |
2010 |
|
2011 |
void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
|
2012 |
{ |
2013 |
switch (reg) {
|
2014 |
case 0: /* APSR */ |
2015 |
xpsr_write(env, val, 0xf8000000);
|
2016 |
break;
|
2017 |
case 1: /* IAPSR */ |
2018 |
xpsr_write(env, val, 0xf8000000);
|
2019 |
break;
|
2020 |
case 2: /* EAPSR */ |
2021 |
xpsr_write(env, val, 0xfe00fc00);
|
2022 |
break;
|
2023 |
case 3: /* xPSR */ |
2024 |
xpsr_write(env, val, 0xfe00fc00);
|
2025 |
break;
|
2026 |
case 5: /* IPSR */ |
2027 |
/* IPSR bits are readonly. */
|
2028 |
break;
|
2029 |
case 6: /* EPSR */ |
2030 |
xpsr_write(env, val, 0x0600fc00);
|
2031 |
break;
|
2032 |
case 7: /* IEPSR */ |
2033 |
xpsr_write(env, val, 0x0600fc00);
|
2034 |
break;
|
2035 |
case 8: /* MSP */ |
2036 |
if (env->v7m.current_sp)
|
2037 |
env->v7m.other_sp = val; |
2038 |
else
|
2039 |
env->regs[13] = val;
|
2040 |
break;
|
2041 |
case 9: /* PSP */ |
2042 |
if (env->v7m.current_sp)
|
2043 |
env->regs[13] = val;
|
2044 |
else
|
2045 |
env->v7m.other_sp = val; |
2046 |
break;
|
2047 |
case 16: /* PRIMASK */ |
2048 |
if (val & 1) |
2049 |
env->uncached_cpsr |= CPSR_I; |
2050 |
else
|
2051 |
env->uncached_cpsr &= ~CPSR_I; |
2052 |
break;
|
2053 |
case 17: /* FAULTMASK */ |
2054 |
if (val & 1) |
2055 |
env->uncached_cpsr |= CPSR_F; |
2056 |
else
|
2057 |
env->uncached_cpsr &= ~CPSR_F; |
2058 |
break;
|
2059 |
case 18: /* BASEPRI */ |
2060 |
env->v7m.basepri = val & 0xff;
|
2061 |
break;
|
2062 |
case 19: /* BASEPRI_MAX */ |
2063 |
val &= 0xff;
|
2064 |
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0)) |
2065 |
env->v7m.basepri = val; |
2066 |
break;
|
2067 |
case 20: /* CONTROL */ |
2068 |
env->v7m.control = val & 3;
|
2069 |
switch_v7m_sp(env, (val & 2) != 0); |
2070 |
break;
|
2071 |
default:
|
2072 |
/* ??? For debugging only. */
|
2073 |
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
|
2074 |
return;
|
2075 |
} |
2076 |
} |
2077 |
|
2078 |
void cpu_arm_set_cp_io(CPUARMState *env, int cpnum, |
2079 |
ARMReadCPFunc *cp_read, ARMWriteCPFunc *cp_write, |
2080 |
void *opaque)
|
2081 |
{ |
2082 |
if (cpnum < 0 || cpnum > 14) { |
2083 |
cpu_abort(env, "Bad coprocessor number: %i\n", cpnum);
|
2084 |
return;
|
2085 |
} |
2086 |
|
2087 |
env->cp[cpnum].cp_read = cp_read; |
2088 |
env->cp[cpnum].cp_write = cp_write; |
2089 |
env->cp[cpnum].opaque = opaque; |
2090 |
} |
2091 |
|
2092 |
#endif
|
2093 |
|
2094 |
/* Note that signed overflow is undefined in C. The following routines are
|
2095 |
careful to use unsigned types where modulo arithmetic is required.
|
2096 |
Failure to do so _will_ break on newer gcc. */
|
2097 |
|
2098 |
/* Signed saturating arithmetic. */
|
2099 |
|
2100 |
/* Perform 16-bit signed saturating addition. */
|
2101 |
static inline uint16_t add16_sat(uint16_t a, uint16_t b) |
2102 |
{ |
2103 |
uint16_t res; |
2104 |
|
2105 |
res = a + b; |
2106 |
if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) { |
2107 |
if (a & 0x8000) |
2108 |
res = 0x8000;
|
2109 |
else
|
2110 |
res = 0x7fff;
|
2111 |
} |
2112 |
return res;
|
2113 |
} |
2114 |
|
2115 |
/* Perform 8-bit signed saturating addition. */
|
2116 |
static inline uint8_t add8_sat(uint8_t a, uint8_t b) |
2117 |
{ |
2118 |
uint8_t res; |
2119 |
|
2120 |
res = a + b; |
2121 |
if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) { |
2122 |
if (a & 0x80) |
2123 |
res = 0x80;
|
2124 |
else
|
2125 |
res = 0x7f;
|
2126 |
} |
2127 |
return res;
|
2128 |
} |
2129 |
|
2130 |
/* Perform 16-bit signed saturating subtraction. */
|
2131 |
static inline uint16_t sub16_sat(uint16_t a, uint16_t b) |
2132 |
{ |
2133 |
uint16_t res; |
2134 |
|
2135 |
res = a - b; |
2136 |
if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) { |
2137 |
if (a & 0x8000) |
2138 |
res = 0x8000;
|
2139 |
else
|
2140 |
res = 0x7fff;
|
2141 |
} |
2142 |
return res;
|
2143 |
} |
2144 |
|
2145 |
/* Perform 8-bit signed saturating subtraction. */
|
2146 |
static inline uint8_t sub8_sat(uint8_t a, uint8_t b) |
2147 |
{ |
2148 |
uint8_t res; |
2149 |
|
2150 |
res = a - b; |
2151 |
if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) { |
2152 |
if (a & 0x80) |
2153 |
res = 0x80;
|
2154 |
else
|
2155 |
res = 0x7f;
|
2156 |
} |
2157 |
return res;
|
2158 |
} |
2159 |
|
2160 |
#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16); |
2161 |
#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16); |
2162 |
#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8); |
2163 |
#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8); |
2164 |
#define PFX q
|
2165 |
|
2166 |
#include "op_addsub.h" |
2167 |
|
2168 |
/* Unsigned saturating arithmetic. */
|
2169 |
static inline uint16_t add16_usat(uint16_t a, uint16_t b) |
2170 |
{ |
2171 |
uint16_t res; |
2172 |
res = a + b; |
2173 |
if (res < a)
|
2174 |
res = 0xffff;
|
2175 |
return res;
|
2176 |
} |
2177 |
|
2178 |
static inline uint16_t sub16_usat(uint16_t a, uint16_t b) |
2179 |
{ |
2180 |
if (a > b)
|
2181 |
return a - b;
|
2182 |
else
|
2183 |
return 0; |
2184 |
} |
2185 |
|
2186 |
static inline uint8_t add8_usat(uint8_t a, uint8_t b) |
2187 |
{ |
2188 |
uint8_t res; |
2189 |
res = a + b; |
2190 |
if (res < a)
|
2191 |
res = 0xff;
|
2192 |
return res;
|
2193 |
} |
2194 |
|
2195 |
static inline uint8_t sub8_usat(uint8_t a, uint8_t b) |
2196 |
{ |
2197 |
if (a > b)
|
2198 |
return a - b;
|
2199 |
else
|
2200 |
return 0; |
2201 |
} |
2202 |
|
2203 |
#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16); |
2204 |
#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16); |
2205 |
#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8); |
2206 |
#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8); |
2207 |
#define PFX uq
|
2208 |
|
2209 |
#include "op_addsub.h" |
2210 |
|
2211 |
/* Signed modulo arithmetic. */
|
2212 |
#define SARITH16(a, b, n, op) do { \ |
2213 |
int32_t sum; \ |
2214 |
sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \ |
2215 |
RESULT(sum, n, 16); \
|
2216 |
if (sum >= 0) \ |
2217 |
ge |= 3 << (n * 2); \ |
2218 |
} while(0) |
2219 |
|
2220 |
#define SARITH8(a, b, n, op) do { \ |
2221 |
int32_t sum; \ |
2222 |
sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \ |
2223 |
RESULT(sum, n, 8); \
|
2224 |
if (sum >= 0) \ |
2225 |
ge |= 1 << n; \
|
2226 |
} while(0) |
2227 |
|
2228 |
|
2229 |
#define ADD16(a, b, n) SARITH16(a, b, n, +)
|
2230 |
#define SUB16(a, b, n) SARITH16(a, b, n, -)
|
2231 |
#define ADD8(a, b, n) SARITH8(a, b, n, +)
|
2232 |
#define SUB8(a, b, n) SARITH8(a, b, n, -)
|
2233 |
#define PFX s
|
2234 |
#define ARITH_GE
|
2235 |
|
2236 |
#include "op_addsub.h" |
2237 |
|
2238 |
/* Unsigned modulo arithmetic. */
|
2239 |
#define ADD16(a, b, n) do { \ |
2240 |
uint32_t sum; \ |
2241 |
sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \ |
2242 |
RESULT(sum, n, 16); \
|
2243 |
if ((sum >> 16) == 1) \ |
2244 |
ge |= 3 << (n * 2); \ |
2245 |
} while(0) |
2246 |
|
2247 |
#define ADD8(a, b, n) do { \ |
2248 |
uint32_t sum; \ |
2249 |
sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \ |
2250 |
RESULT(sum, n, 8); \
|
2251 |
if ((sum >> 8) == 1) \ |
2252 |
ge |= 1 << n; \
|
2253 |
} while(0) |
2254 |
|
2255 |
#define SUB16(a, b, n) do { \ |
2256 |
uint32_t sum; \ |
2257 |
sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \ |
2258 |
RESULT(sum, n, 16); \
|
2259 |
if ((sum >> 16) == 0) \ |
2260 |
ge |= 3 << (n * 2); \ |
2261 |
} while(0) |
2262 |
|
2263 |
#define SUB8(a, b, n) do { \ |
2264 |
uint32_t sum; \ |
2265 |
sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \ |
2266 |
RESULT(sum, n, 8); \
|
2267 |
if ((sum >> 8) == 0) \ |
2268 |
ge |= 1 << n; \
|
2269 |
} while(0) |
2270 |
|
2271 |
#define PFX u
|
2272 |
#define ARITH_GE
|
2273 |
|
2274 |
#include "op_addsub.h" |
2275 |
|
2276 |
/* Halved signed arithmetic. */
|
2277 |
#define ADD16(a, b, n) \
|
2278 |
RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16) |
2279 |
#define SUB16(a, b, n) \
|
2280 |
RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16) |
2281 |
#define ADD8(a, b, n) \
|
2282 |
RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8) |
2283 |
#define SUB8(a, b, n) \
|
2284 |
RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8) |
2285 |
#define PFX sh
|
2286 |
|
2287 |
#include "op_addsub.h" |
2288 |
|
2289 |
/* Halved unsigned arithmetic. */
|
2290 |
#define ADD16(a, b, n) \
|
2291 |
RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
2292 |
#define SUB16(a, b, n) \
|
2293 |
RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
2294 |
#define ADD8(a, b, n) \
|
2295 |
RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
2296 |
#define SUB8(a, b, n) \
|
2297 |
RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
2298 |
#define PFX uh
|
2299 |
|
2300 |
#include "op_addsub.h" |
2301 |
|
2302 |
static inline uint8_t do_usad(uint8_t a, uint8_t b) |
2303 |
{ |
2304 |
if (a > b)
|
2305 |
return a - b;
|
2306 |
else
|
2307 |
return b - a;
|
2308 |
} |
2309 |
|
2310 |
/* Unsigned sum of absolute byte differences. */
|
2311 |
uint32_t HELPER(usad8)(uint32_t a, uint32_t b) |
2312 |
{ |
2313 |
uint32_t sum; |
2314 |
sum = do_usad(a, b); |
2315 |
sum += do_usad(a >> 8, b >> 8); |
2316 |
sum += do_usad(a >> 16, b >>16); |
2317 |
sum += do_usad(a >> 24, b >> 24); |
2318 |
return sum;
|
2319 |
} |
2320 |
|
2321 |
/* For ARMv6 SEL instruction. */
|
2322 |
uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b) |
2323 |
{ |
2324 |
uint32_t mask; |
2325 |
|
2326 |
mask = 0;
|
2327 |
if (flags & 1) |
2328 |
mask |= 0xff;
|
2329 |
if (flags & 2) |
2330 |
mask |= 0xff00;
|
2331 |
if (flags & 4) |
2332 |
mask |= 0xff0000;
|
2333 |
if (flags & 8) |
2334 |
mask |= 0xff000000;
|
2335 |
return (a & mask) | (b & ~mask);
|
2336 |
} |
2337 |
|
2338 |
uint32_t HELPER(logicq_cc)(uint64_t val) |
2339 |
{ |
2340 |
return (val >> 32) | (val != 0); |
2341 |
} |
2342 |
|
2343 |
/* VFP support. We follow the convention used for VFP instrunctions:
|
2344 |
Single precition routines have a "s" suffix, double precision a
|
2345 |
"d" suffix. */
|
2346 |
|
2347 |
/* Convert host exception flags to vfp form. */
|
2348 |
static inline int vfp_exceptbits_from_host(int host_bits) |
2349 |
{ |
2350 |
int target_bits = 0; |
2351 |
|
2352 |
if (host_bits & float_flag_invalid)
|
2353 |
target_bits |= 1;
|
2354 |
if (host_bits & float_flag_divbyzero)
|
2355 |
target_bits |= 2;
|
2356 |
if (host_bits & float_flag_overflow)
|
2357 |
target_bits |= 4;
|
2358 |
if (host_bits & (float_flag_underflow | float_flag_output_denormal))
|
2359 |
target_bits |= 8;
|
2360 |
if (host_bits & float_flag_inexact)
|
2361 |
target_bits |= 0x10;
|
2362 |
if (host_bits & float_flag_input_denormal)
|
2363 |
target_bits |= 0x80;
|
2364 |
return target_bits;
|
2365 |
} |
2366 |
|
2367 |
uint32_t HELPER(vfp_get_fpscr)(CPUState *env) |
2368 |
{ |
2369 |
int i;
|
2370 |
uint32_t fpscr; |
2371 |
|
2372 |
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
|
2373 |
| (env->vfp.vec_len << 16)
|
2374 |
| (env->vfp.vec_stride << 20);
|
2375 |
i = get_float_exception_flags(&env->vfp.fp_status); |
2376 |
i |= get_float_exception_flags(&env->vfp.standard_fp_status); |
2377 |
fpscr |= vfp_exceptbits_from_host(i); |
2378 |
return fpscr;
|
2379 |
} |
2380 |
|
2381 |
uint32_t vfp_get_fpscr(CPUState *env) |
2382 |
{ |
2383 |
return HELPER(vfp_get_fpscr)(env);
|
2384 |
} |
2385 |
|
2386 |
/* Convert vfp exception flags to target form. */
|
2387 |
static inline int vfp_exceptbits_to_host(int target_bits) |
2388 |
{ |
2389 |
int host_bits = 0; |
2390 |
|
2391 |
if (target_bits & 1) |
2392 |
host_bits |= float_flag_invalid; |
2393 |
if (target_bits & 2) |
2394 |
host_bits |= float_flag_divbyzero; |
2395 |
if (target_bits & 4) |
2396 |
host_bits |= float_flag_overflow; |
2397 |
if (target_bits & 8) |
2398 |
host_bits |= float_flag_underflow; |
2399 |
if (target_bits & 0x10) |
2400 |
host_bits |= float_flag_inexact; |
2401 |
if (target_bits & 0x80) |
2402 |
host_bits |= float_flag_input_denormal; |
2403 |
return host_bits;
|
2404 |
} |
2405 |
|
2406 |
void HELPER(vfp_set_fpscr)(CPUState *env, uint32_t val)
|
2407 |
{ |
2408 |
int i;
|
2409 |
uint32_t changed; |
2410 |
|
2411 |
changed = env->vfp.xregs[ARM_VFP_FPSCR]; |
2412 |
env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
|
2413 |
env->vfp.vec_len = (val >> 16) & 7; |
2414 |
env->vfp.vec_stride = (val >> 20) & 3; |
2415 |
|
2416 |
changed ^= val; |
2417 |
if (changed & (3 << 22)) { |
2418 |
i = (val >> 22) & 3; |
2419 |
switch (i) {
|
2420 |
case 0: |
2421 |
i = float_round_nearest_even; |
2422 |
break;
|
2423 |
case 1: |
2424 |
i = float_round_up; |
2425 |
break;
|
2426 |
case 2: |
2427 |
i = float_round_down; |
2428 |
break;
|
2429 |
case 3: |
2430 |
i = float_round_to_zero; |
2431 |
break;
|
2432 |
} |
2433 |
set_float_rounding_mode(i, &env->vfp.fp_status); |
2434 |
} |
2435 |
if (changed & (1 << 24)) { |
2436 |
set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); |
2437 |
set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); |
2438 |
} |
2439 |
if (changed & (1 << 25)) |
2440 |
set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status); |
2441 |
|
2442 |
i = vfp_exceptbits_to_host(val); |
2443 |
set_float_exception_flags(i, &env->vfp.fp_status); |
2444 |
set_float_exception_flags(0, &env->vfp.standard_fp_status);
|
2445 |
} |
2446 |
|
2447 |
void vfp_set_fpscr(CPUState *env, uint32_t val)
|
2448 |
{ |
2449 |
HELPER(vfp_set_fpscr)(env, val); |
2450 |
} |
2451 |
|
2452 |
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
|
2453 |
|
2454 |
#define VFP_BINOP(name) \
|
2455 |
float32 VFP_HELPER(name, s)(float32 a, float32 b, CPUState *env) \ |
2456 |
{ \ |
2457 |
return float32_ ## name (a, b, &env->vfp.fp_status); \ |
2458 |
} \ |
2459 |
float64 VFP_HELPER(name, d)(float64 a, float64 b, CPUState *env) \ |
2460 |
{ \ |
2461 |
return float64_ ## name (a, b, &env->vfp.fp_status); \ |
2462 |
} |
2463 |
VFP_BINOP(add) |
2464 |
VFP_BINOP(sub) |
2465 |
VFP_BINOP(mul) |
2466 |
VFP_BINOP(div) |
2467 |
#undef VFP_BINOP
|
2468 |
|
2469 |
float32 VFP_HELPER(neg, s)(float32 a) |
2470 |
{ |
2471 |
return float32_chs(a);
|
2472 |
} |
2473 |
|
2474 |
float64 VFP_HELPER(neg, d)(float64 a) |
2475 |
{ |
2476 |
return float64_chs(a);
|
2477 |
} |
2478 |
|
2479 |
float32 VFP_HELPER(abs, s)(float32 a) |
2480 |
{ |
2481 |
return float32_abs(a);
|
2482 |
} |
2483 |
|
2484 |
float64 VFP_HELPER(abs, d)(float64 a) |
2485 |
{ |
2486 |
return float64_abs(a);
|
2487 |
} |
2488 |
|
2489 |
float32 VFP_HELPER(sqrt, s)(float32 a, CPUState *env) |
2490 |
{ |
2491 |
return float32_sqrt(a, &env->vfp.fp_status);
|
2492 |
} |
2493 |
|
2494 |
float64 VFP_HELPER(sqrt, d)(float64 a, CPUState *env) |
2495 |
{ |
2496 |
return float64_sqrt(a, &env->vfp.fp_status);
|
2497 |
} |
2498 |
|
2499 |
/* XXX: check quiet/signaling case */
|
2500 |
#define DO_VFP_cmp(p, type) \
|
2501 |
void VFP_HELPER(cmp, p)(type a, type b, CPUState *env) \
|
2502 |
{ \ |
2503 |
uint32_t flags; \ |
2504 |
switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \ |
2505 |
case 0: flags = 0x6; break; \ |
2506 |
case -1: flags = 0x8; break; \ |
2507 |
case 1: flags = 0x2; break; \ |
2508 |
default: case 2: flags = 0x3; break; \ |
2509 |
} \ |
2510 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
2511 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
2512 |
} \ |
2513 |
void VFP_HELPER(cmpe, p)(type a, type b, CPUState *env) \
|
2514 |
{ \ |
2515 |
uint32_t flags; \ |
2516 |
switch(type ## _compare(a, b, &env->vfp.fp_status)) { \ |
2517 |
case 0: flags = 0x6; break; \ |
2518 |
case -1: flags = 0x8; break; \ |
2519 |
case 1: flags = 0x2; break; \ |
2520 |
default: case 2: flags = 0x3; break; \ |
2521 |
} \ |
2522 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
2523 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
2524 |
} |
2525 |
DO_VFP_cmp(s, float32) |
2526 |
DO_VFP_cmp(d, float64) |
2527 |
#undef DO_VFP_cmp
|
2528 |
|
2529 |
/* Integer to float and float to integer conversions */
|
2530 |
|
2531 |
#define CONV_ITOF(name, fsz, sign) \
|
2532 |
float##fsz HELPER(name)(uint32_t x, void *fpstp) \ |
2533 |
{ \ |
2534 |
float_status *fpst = fpstp; \ |
2535 |
return sign##int32_to_##float##fsz(x, fpst); \ |
2536 |
} |
2537 |
|
2538 |
#define CONV_FTOI(name, fsz, sign, round) \
|
2539 |
uint32_t HELPER(name)(float##fsz x, void *fpstp) \ |
2540 |
{ \ |
2541 |
float_status *fpst = fpstp; \ |
2542 |
if (float##fsz##_is_any_nan(x)) { \ |
2543 |
float_raise(float_flag_invalid, fpst); \ |
2544 |
return 0; \ |
2545 |
} \ |
2546 |
return float##fsz##_to_##sign##int32##round(x, fpst); \ |
2547 |
} |
2548 |
|
2549 |
#define FLOAT_CONVS(name, p, fsz, sign) \
|
2550 |
CONV_ITOF(vfp_##name##to##p, fsz, sign) \ |
2551 |
CONV_FTOI(vfp_to##name##p, fsz, sign, ) \ |
2552 |
CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero) |
2553 |
|
2554 |
FLOAT_CONVS(si, s, 32, )
|
2555 |
FLOAT_CONVS(si, d, 64, )
|
2556 |
FLOAT_CONVS(ui, s, 32, u)
|
2557 |
FLOAT_CONVS(ui, d, 64, u)
|
2558 |
|
2559 |
#undef CONV_ITOF
|
2560 |
#undef CONV_FTOI
|
2561 |
#undef FLOAT_CONVS
|
2562 |
|
2563 |
/* floating point conversion */
|
2564 |
float64 VFP_HELPER(fcvtd, s)(float32 x, CPUState *env) |
2565 |
{ |
2566 |
float64 r = float32_to_float64(x, &env->vfp.fp_status); |
2567 |
/* ARM requires that S<->D conversion of any kind of NaN generates
|
2568 |
* a quiet NaN by forcing the most significant frac bit to 1.
|
2569 |
*/
|
2570 |
return float64_maybe_silence_nan(r);
|
2571 |
} |
2572 |
|
2573 |
float32 VFP_HELPER(fcvts, d)(float64 x, CPUState *env) |
2574 |
{ |
2575 |
float32 r = float64_to_float32(x, &env->vfp.fp_status); |
2576 |
/* ARM requires that S<->D conversion of any kind of NaN generates
|
2577 |
* a quiet NaN by forcing the most significant frac bit to 1.
|
2578 |
*/
|
2579 |
return float32_maybe_silence_nan(r);
|
2580 |
} |
2581 |
|
2582 |
/* VFP3 fixed point conversion. */
|
2583 |
#define VFP_CONV_FIX(name, p, fsz, itype, sign) \
|
2584 |
float##fsz HELPER(vfp_##name##to##p)(uint##fsz##_t x, uint32_t shift, \ |
2585 |
void *fpstp) \
|
2586 |
{ \ |
2587 |
float_status *fpst = fpstp; \ |
2588 |
float##fsz tmp; \ |
2589 |
tmp = sign##int32_to_##float##fsz((itype##_t)x, fpst); \ |
2590 |
return float##fsz##_scalbn(tmp, -(int)shift, fpst); \ |
2591 |
} \ |
2592 |
uint##fsz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \ |
2593 |
void *fpstp) \
|
2594 |
{ \ |
2595 |
float_status *fpst = fpstp; \ |
2596 |
float##fsz tmp; \ |
2597 |
if (float##fsz##_is_any_nan(x)) { \ |
2598 |
float_raise(float_flag_invalid, fpst); \ |
2599 |
return 0; \ |
2600 |
} \ |
2601 |
tmp = float##fsz##_scalbn(x, shift, fpst); \ |
2602 |
return float##fsz##_to_##itype##_round_to_zero(tmp, fpst); \ |
2603 |
} |
2604 |
|
2605 |
VFP_CONV_FIX(sh, d, 64, int16, )
|
2606 |
VFP_CONV_FIX(sl, d, 64, int32, )
|
2607 |
VFP_CONV_FIX(uh, d, 64, uint16, u)
|
2608 |
VFP_CONV_FIX(ul, d, 64, uint32, u)
|
2609 |
VFP_CONV_FIX(sh, s, 32, int16, )
|
2610 |
VFP_CONV_FIX(sl, s, 32, int32, )
|
2611 |
VFP_CONV_FIX(uh, s, 32, uint16, u)
|
2612 |
VFP_CONV_FIX(ul, s, 32, uint32, u)
|
2613 |
#undef VFP_CONV_FIX
|
2614 |
|
2615 |
/* Half precision conversions. */
|
2616 |
static float32 do_fcvt_f16_to_f32(uint32_t a, CPUState *env, float_status *s)
|
2617 |
{ |
2618 |
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; |
2619 |
float32 r = float16_to_float32(make_float16(a), ieee, s); |
2620 |
if (ieee) {
|
2621 |
return float32_maybe_silence_nan(r);
|
2622 |
} |
2623 |
return r;
|
2624 |
} |
2625 |
|
2626 |
static uint32_t do_fcvt_f32_to_f16(float32 a, CPUState *env, float_status *s)
|
2627 |
{ |
2628 |
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; |
2629 |
float16 r = float32_to_float16(a, ieee, s); |
2630 |
if (ieee) {
|
2631 |
r = float16_maybe_silence_nan(r); |
2632 |
} |
2633 |
return float16_val(r);
|
2634 |
} |
2635 |
|
2636 |
float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUState *env) |
2637 |
{ |
2638 |
return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status);
|
2639 |
} |
2640 |
|
2641 |
uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUState *env) |
2642 |
{ |
2643 |
return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status);
|
2644 |
} |
2645 |
|
2646 |
float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUState *env) |
2647 |
{ |
2648 |
return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status);
|
2649 |
} |
2650 |
|
2651 |
uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUState *env) |
2652 |
{ |
2653 |
return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status);
|
2654 |
} |
2655 |
|
2656 |
#define float32_two make_float32(0x40000000) |
2657 |
#define float32_three make_float32(0x40400000) |
2658 |
#define float32_one_point_five make_float32(0x3fc00000) |
2659 |
|
2660 |
float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env) |
2661 |
{ |
2662 |
float_status *s = &env->vfp.standard_fp_status; |
2663 |
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
|
2664 |
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) { |
2665 |
if (!(float32_is_zero(a) || float32_is_zero(b))) {
|
2666 |
float_raise(float_flag_input_denormal, s); |
2667 |
} |
2668 |
return float32_two;
|
2669 |
} |
2670 |
return float32_sub(float32_two, float32_mul(a, b, s), s);
|
2671 |
} |
2672 |
|
2673 |
float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUState *env) |
2674 |
{ |
2675 |
float_status *s = &env->vfp.standard_fp_status; |
2676 |
float32 product; |
2677 |
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
|
2678 |
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) { |
2679 |
if (!(float32_is_zero(a) || float32_is_zero(b))) {
|
2680 |
float_raise(float_flag_input_denormal, s); |
2681 |
} |
2682 |
return float32_one_point_five;
|
2683 |
} |
2684 |
product = float32_mul(a, b, s); |
2685 |
return float32_div(float32_sub(float32_three, product, s), float32_two, s);
|
2686 |
} |
2687 |
|
2688 |
/* NEON helpers. */
|
2689 |
|
2690 |
/* Constants 256 and 512 are used in some helpers; we avoid relying on
|
2691 |
* int->float conversions at run-time. */
|
2692 |
#define float64_256 make_float64(0x4070000000000000LL) |
2693 |
#define float64_512 make_float64(0x4080000000000000LL) |
2694 |
|
2695 |
/* The algorithm that must be used to calculate the estimate
|
2696 |
* is specified by the ARM ARM.
|
2697 |
*/
|
2698 |
static float64 recip_estimate(float64 a, CPUState *env)
|
2699 |
{ |
2700 |
/* These calculations mustn't set any fp exception flags,
|
2701 |
* so we use a local copy of the fp_status.
|
2702 |
*/
|
2703 |
float_status dummy_status = env->vfp.standard_fp_status; |
2704 |
float_status *s = &dummy_status; |
2705 |
/* q = (int)(a * 512.0) */
|
2706 |
float64 q = float64_mul(float64_512, a, s); |
2707 |
int64_t q_int = float64_to_int64_round_to_zero(q, s); |
2708 |
|
2709 |
/* r = 1.0 / (((double)q + 0.5) / 512.0) */
|
2710 |
q = int64_to_float64(q_int, s); |
2711 |
q = float64_add(q, float64_half, s); |
2712 |
q = float64_div(q, float64_512, s); |
2713 |
q = float64_div(float64_one, q, s); |
2714 |
|
2715 |
/* s = (int)(256.0 * r + 0.5) */
|
2716 |
q = float64_mul(q, float64_256, s); |
2717 |
q = float64_add(q, float64_half, s); |
2718 |
q_int = float64_to_int64_round_to_zero(q, s); |
2719 |
|
2720 |
/* return (double)s / 256.0 */
|
2721 |
return float64_div(int64_to_float64(q_int, s), float64_256, s);
|
2722 |
} |
2723 |
|
2724 |
float32 HELPER(recpe_f32)(float32 a, CPUState *env) |
2725 |
{ |
2726 |
float_status *s = &env->vfp.standard_fp_status; |
2727 |
float64 f64; |
2728 |
uint32_t val32 = float32_val(a); |
2729 |
|
2730 |
int result_exp;
|
2731 |
int a_exp = (val32 & 0x7f800000) >> 23; |
2732 |
int sign = val32 & 0x80000000; |
2733 |
|
2734 |
if (float32_is_any_nan(a)) {
|
2735 |
if (float32_is_signaling_nan(a)) {
|
2736 |
float_raise(float_flag_invalid, s); |
2737 |
} |
2738 |
return float32_default_nan;
|
2739 |
} else if (float32_is_infinity(a)) { |
2740 |
return float32_set_sign(float32_zero, float32_is_neg(a));
|
2741 |
} else if (float32_is_zero_or_denormal(a)) { |
2742 |
if (!float32_is_zero(a)) {
|
2743 |
float_raise(float_flag_input_denormal, s); |
2744 |
} |
2745 |
float_raise(float_flag_divbyzero, s); |
2746 |
return float32_set_sign(float32_infinity, float32_is_neg(a));
|
2747 |
} else if (a_exp >= 253) { |
2748 |
float_raise(float_flag_underflow, s); |
2749 |
return float32_set_sign(float32_zero, float32_is_neg(a));
|
2750 |
} |
2751 |
|
2752 |
f64 = make_float64((0x3feULL << 52) |
2753 |
| ((int64_t)(val32 & 0x7fffff) << 29)); |
2754 |
|
2755 |
result_exp = 253 - a_exp;
|
2756 |
|
2757 |
f64 = recip_estimate(f64, env); |
2758 |
|
2759 |
val32 = sign |
2760 |
| ((result_exp & 0xff) << 23) |
2761 |
| ((float64_val(f64) >> 29) & 0x7fffff); |
2762 |
return make_float32(val32);
|
2763 |
} |
2764 |
|
2765 |
/* The algorithm that must be used to calculate the estimate
|
2766 |
* is specified by the ARM ARM.
|
2767 |
*/
|
2768 |
static float64 recip_sqrt_estimate(float64 a, CPUState *env)
|
2769 |
{ |
2770 |
/* These calculations mustn't set any fp exception flags,
|
2771 |
* so we use a local copy of the fp_status.
|
2772 |
*/
|
2773 |
float_status dummy_status = env->vfp.standard_fp_status; |
2774 |
float_status *s = &dummy_status; |
2775 |
float64 q; |
2776 |
int64_t q_int; |
2777 |
|
2778 |
if (float64_lt(a, float64_half, s)) {
|
2779 |
/* range 0.25 <= a < 0.5 */
|
2780 |
|
2781 |
/* a in units of 1/512 rounded down */
|
2782 |
/* q0 = (int)(a * 512.0); */
|
2783 |
q = float64_mul(float64_512, a, s); |
2784 |
q_int = float64_to_int64_round_to_zero(q, s); |
2785 |
|
2786 |
/* reciprocal root r */
|
2787 |
/* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */
|
2788 |
q = int64_to_float64(q_int, s); |
2789 |
q = float64_add(q, float64_half, s); |
2790 |
q = float64_div(q, float64_512, s); |
2791 |
q = float64_sqrt(q, s); |
2792 |
q = float64_div(float64_one, q, s); |
2793 |
} else {
|
2794 |
/* range 0.5 <= a < 1.0 */
|
2795 |
|
2796 |
/* a in units of 1/256 rounded down */
|
2797 |
/* q1 = (int)(a * 256.0); */
|
2798 |
q = float64_mul(float64_256, a, s); |
2799 |
int64_t q_int = float64_to_int64_round_to_zero(q, s); |
2800 |
|
2801 |
/* reciprocal root r */
|
2802 |
/* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
|
2803 |
q = int64_to_float64(q_int, s); |
2804 |
q = float64_add(q, float64_half, s); |
2805 |
q = float64_div(q, float64_256, s); |
2806 |
q = float64_sqrt(q, s); |
2807 |
q = float64_div(float64_one, q, s); |
2808 |
} |
2809 |
/* r in units of 1/256 rounded to nearest */
|
2810 |
/* s = (int)(256.0 * r + 0.5); */
|
2811 |
|
2812 |
q = float64_mul(q, float64_256,s ); |
2813 |
q = float64_add(q, float64_half, s); |
2814 |
q_int = float64_to_int64_round_to_zero(q, s); |
2815 |
|
2816 |
/* return (double)s / 256.0;*/
|
2817 |
return float64_div(int64_to_float64(q_int, s), float64_256, s);
|
2818 |
} |
2819 |
|
2820 |
float32 HELPER(rsqrte_f32)(float32 a, CPUState *env) |
2821 |
{ |
2822 |
float_status *s = &env->vfp.standard_fp_status; |
2823 |
int result_exp;
|
2824 |
float64 f64; |
2825 |
uint32_t val; |
2826 |
uint64_t val64; |
2827 |
|
2828 |
val = float32_val(a); |
2829 |
|
2830 |
if (float32_is_any_nan(a)) {
|
2831 |
if (float32_is_signaling_nan(a)) {
|
2832 |
float_raise(float_flag_invalid, s); |
2833 |
} |
2834 |
return float32_default_nan;
|
2835 |
} else if (float32_is_zero_or_denormal(a)) { |
2836 |
if (!float32_is_zero(a)) {
|
2837 |
float_raise(float_flag_input_denormal, s); |
2838 |
} |
2839 |
float_raise(float_flag_divbyzero, s); |
2840 |
return float32_set_sign(float32_infinity, float32_is_neg(a));
|
2841 |
} else if (float32_is_neg(a)) { |
2842 |
float_raise(float_flag_invalid, s); |
2843 |
return float32_default_nan;
|
2844 |
} else if (float32_is_infinity(a)) { |
2845 |
return float32_zero;
|
2846 |
} |
2847 |
|
2848 |
/* Normalize to a double-precision value between 0.25 and 1.0,
|
2849 |
* preserving the parity of the exponent. */
|
2850 |
if ((val & 0x800000) == 0) { |
2851 |
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32) |
2852 |
| (0x3feULL << 52) |
2853 |
| ((uint64_t)(val & 0x7fffff) << 29)); |
2854 |
} else {
|
2855 |
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32) |
2856 |
| (0x3fdULL << 52) |
2857 |
| ((uint64_t)(val & 0x7fffff) << 29)); |
2858 |
} |
2859 |
|
2860 |
result_exp = (380 - ((val & 0x7f800000) >> 23)) / 2; |
2861 |
|
2862 |
f64 = recip_sqrt_estimate(f64, env); |
2863 |
|
2864 |
val64 = float64_val(f64); |
2865 |
|
2866 |
val = ((val64 >> 63) & 0x80000000) |
2867 |
| ((result_exp & 0xff) << 23) |
2868 |
| ((val64 >> 29) & 0x7fffff); |
2869 |
return make_float32(val);
|
2870 |
} |
2871 |
|
2872 |
uint32_t HELPER(recpe_u32)(uint32_t a, CPUState *env) |
2873 |
{ |
2874 |
float64 f64; |
2875 |
|
2876 |
if ((a & 0x80000000) == 0) { |
2877 |
return 0xffffffff; |
2878 |
} |
2879 |
|
2880 |
f64 = make_float64((0x3feULL << 52) |
2881 |
| ((int64_t)(a & 0x7fffffff) << 21)); |
2882 |
|
2883 |
f64 = recip_estimate (f64, env); |
2884 |
|
2885 |
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); |
2886 |
} |
2887 |
|
2888 |
uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUState *env) |
2889 |
{ |
2890 |
float64 f64; |
2891 |
|
2892 |
if ((a & 0xc0000000) == 0) { |
2893 |
return 0xffffffff; |
2894 |
} |
2895 |
|
2896 |
if (a & 0x80000000) { |
2897 |
f64 = make_float64((0x3feULL << 52) |
2898 |
| ((uint64_t)(a & 0x7fffffff) << 21)); |
2899 |
} else { /* bits 31-30 == '01' */ |
2900 |
f64 = make_float64((0x3fdULL << 52) |
2901 |
| ((uint64_t)(a & 0x3fffffff) << 22)); |
2902 |
} |
2903 |
|
2904 |
f64 = recip_sqrt_estimate(f64, env); |
2905 |
|
2906 |
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); |
2907 |
} |
2908 |
|
2909 |
void HELPER(set_teecr)(CPUState *env, uint32_t val)
|
2910 |
{ |
2911 |
val &= 1;
|
2912 |
if (env->teecr != val) {
|
2913 |
env->teecr = val; |
2914 |
tb_flush(env); |
2915 |
} |
2916 |
} |