/* CPUClass::reset() */
static void arm_cpu_reset(CPUState *s)
{
ARMCPU *cpu = ARM_CPU(s);
ARMCPUClass *acc = ARM_CPU_GET_CLASS(cpu);
CPUARMState *env = &cpu->env;
acc->parent_reset(s);
memset(env, 0, offsetof(CPUARMState, features));
g_hash_table_foreach(cpu->cp_regs, cp_reg_reset, cpu);
g_hash_table_foreach(cpu->cp_regs, cp_reg_check_reset, cpu);
env->vfp.xregs[ARM_VFP_FPSID] = cpu->reset_fpsid;
env->vfp.xregs[ARM_VFP_MVFR0] = cpu->mvfr0;
env->vfp.xregs[ARM_VFP_MVFR1] = cpu->mvfr1;
env->vfp.xregs[ARM_VFP_MVFR2] = cpu->mvfr2;
cpu->powered_off = cpu->start_powered_off;
s->halted = cpu->start_powered_off;
if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q';
}
if (arm_feature(env, ARM_FEATURE_AARCH64)) {
/* 64 bit CPUs always start in 64 bit mode */
env->aarch64 = 1;
#if defined(CONFIG_USER_ONLY)
env->pstate = PSTATE_MODE_EL0t;
/* Userspace expects access to DC ZVA, CTL_EL0 and the cache ops */
env->cp15.sctlr_el[1] |= SCTLR_UCT | SCTLR_UCI | SCTLR_DZE;
/* and to the FP/Neon instructions */
env->cp15.cpacr_el1 = deposit64(env->cp15.cpacr_el1, 20, 2, 3);
#else
/* Reset into the highest available EL */
if (arm_feature(env, ARM_FEATURE_EL3)) {
env->pstate = PSTATE_MODE_EL3h;
} else if (arm_feature(env, ARM_FEATURE_EL2)) {
env->pstate = PSTATE_MODE_EL2h;
} else {
env->pstate = PSTATE_MODE_EL1h;
}
env->pc = cpu->rvbar;
#endif
} else {
#if defined(CONFIG_USER_ONLY)
/* Userspace expects access to cp10 and cp11 for FP/Neon */
env->cp15.cpacr_el1 = deposit64(env->cp15.cpacr_el1, 20, 4, 0xf);
#endif
}
#if defined(CONFIG_USER_ONLY)
env->uncached_cpsr = ARM_CPU_MODE_USR;
/* For user mode we must enable access to coprocessors */
env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30;
if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
env->cp15.c15_cpar = 3;
} else if (arm_feature(env, ARM_FEATURE_XSCALE)) {
env->cp15.c15_cpar = 1;
}
#else
/* SVC mode with interrupts disabled. */
env->uncached_cpsr = ARM_CPU_MODE_SVC;
env->daif = PSTATE_D | PSTATE_A | PSTATE_I | PSTATE_F;
/* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is
* clear at reset. Initial SP and PC are loaded from ROM.
*/
if (IS_M(env)) {
uint32_t initial_msp; /* Loaded from 0x0 */
uint32_t initial_pc; /* Loaded from 0x4 */
uint8_t *rom;
env->daif &= ~PSTATE_I;
rom = rom_ptr(0);
if (rom) {
/* Address zero is covered by ROM which hasn't yet been
* copied into physical memory.
*/
initial_msp = ldl_p(rom);
initial_pc = ldl_p(rom + 4);
} else {
/* Address zero not covered by a ROM blob, or the ROM blob
* is in non-modifiable memory and this is a second reset after
* it got copied into memory. In the latter case, rom_ptr
* will return a NULL pointer and we should use ldl_phys instead.
*/
initial_msp = ldl_phys(s->as, 0);
initial_pc = ldl_phys(s->as, 4);
}
env->regs[13] = initial_msp & 0xFFFFFFFC;
env->regs[15] = initial_pc & ~1;
env->thumb = initial_pc & 1;
}
/* AArch32 has a hard highvec setting of 0xFFFF0000. If we are currently
* executing as AArch32 then check if highvecs are enabled and
* adjust the PC accordingly.
*/
if (A32_BANKED_CURRENT_REG_GET(env, sctlr) & SCTLR_V) {
env->regs[15] = 0xFFFF0000;
}
env->vfp.xregs[ARM_VFP_FPEXC] = 0;
#endif
set_flush_to_zero(1, &env->vfp.standard_fp_status);
set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status);
set_default_nan_mode(1, &env->vfp.standard_fp_status);
set_float_detect_tininess(float_tininess_before_rounding,
&env->vfp.fp_status);
set_float_detect_tininess(float_tininess_before_rounding,
&env->vfp.standard_fp_status);
tlb_flush(s, 1);
#ifndef CONFIG_USER_ONLY
if (kvm_enabled()) {
kvm_arm_reset_vcpu(cpu);
}
#endif
hw_breakpoint_update_all(cpu);
hw_watchpoint_update_all(cpu);
}
/* CPUClass::reset() */
static void arm_cpu_reset(CPUState *s)
{
ARMCPU *cpu = ARM_CPU(s);
ARMCPUClass *acc = ARM_CPU_GET_CLASS(cpu);
CPUARMState *env = &cpu->env;
acc->parent_reset(s);
memset(env, 0, offsetof(CPUARMState, features));
g_hash_table_foreach(cpu->cp_regs, cp_reg_reset, cpu);
env->vfp.xregs[ARM_VFP_FPSID] = cpu->reset_fpsid;
env->vfp.xregs[ARM_VFP_MVFR0] = cpu->mvfr0;
env->vfp.xregs[ARM_VFP_MVFR1] = cpu->mvfr1;
env->vfp.xregs[ARM_VFP_MVFR2] = cpu->mvfr2;
if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q';
}
if (arm_feature(env, ARM_FEATURE_AARCH64)) {
/* 64 bit CPUs always start in 64 bit mode */
env->aarch64 = 1;
#if defined(CONFIG_USER_ONLY)
env->pstate = PSTATE_MODE_EL0t;
/* Userspace expects access to CTL_EL0 and the cache ops */
env->cp15.c1_sys |= SCTLR_UCT | SCTLR_UCI;
/* and to the FP/Neon instructions */
env->cp15.c1_coproc = deposit64(env->cp15.c1_coproc, 20, 2, 3);
#else
env->pstate = PSTATE_MODE_EL1h;
env->pc = cpu->rvbar;
#endif
} else {
#if defined(CONFIG_USER_ONLY)
/* Userspace expects access to cp10 and cp11 for FP/Neon */
env->cp15.c1_coproc = deposit64(env->cp15.c1_coproc, 20, 4, 0xf);
#endif
}
#if defined(CONFIG_USER_ONLY)
env->uncached_cpsr = ARM_CPU_MODE_USR;
/* For user mode we must enable access to coprocessors */
env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30;
if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
env->cp15.c15_cpar = 3;
} else if (arm_feature(env, ARM_FEATURE_XSCALE)) {
env->cp15.c15_cpar = 1;
}
#else
/* SVC mode with interrupts disabled. */
env->uncached_cpsr = ARM_CPU_MODE_SVC;
env->daif = PSTATE_D | PSTATE_A | PSTATE_I | PSTATE_F;
/* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is
clear at reset. Initial SP and PC are loaded from ROM. */
if (IS_M(env)) {
uint32_t pc;
uint8_t *rom;
env->daif &= ~PSTATE_I;
rom = rom_ptr(0);
if (rom) {
/* We should really use ldl_phys here, in case the guest
modified flash and reset itself. However images
loaded via -kernel have not been copied yet, so load the
values directly from there. */
env->regs[13] = ldl_p(rom) & 0xFFFFFFFC;
pc = ldl_p(rom + 4);
env->thumb = pc & 1;
env->regs[15] = pc & ~1;
}
}
if (env->cp15.c1_sys & SCTLR_V) {
env->regs[15] = 0xFFFF0000;
}
env->vfp.xregs[ARM_VFP_FPEXC] = 0;
#endif
set_flush_to_zero(1, &env->vfp.standard_fp_status);
set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status);
set_default_nan_mode(1, &env->vfp.standard_fp_status);
set_float_detect_tininess(float_tininess_before_rounding,
&env->vfp.fp_status);
set_float_detect_tininess(float_tininess_before_rounding,
&env->vfp.standard_fp_status);
tlb_flush(s, 1);
/* Reset is a state change for some CPUARMState fields which we
* bake assumptions about into translated code, so we need to
* tb_flush().
*/
tb_flush(env);
#ifndef CONFIG_USER_ONLY
if (kvm_enabled()) {
kvm_arm_reset_vcpu(cpu);
}
#endif
}