/* return non zero if the very first instruction is invalid so that
the virtual CPU can trigger an exception.
'*gen_code_size_ptr' contains the size of the generated code (host
code).
*/
int cpu_gen_code(CPUState *env, TranslationBlock *tb, int *gen_code_size_ptr)
{
TCGContext *s = &tcg_ctx;
uint8_t *gen_code_buf;
int gen_code_size;
#ifdef CONFIG_PROFILER
int64_t ti;
#endif
#ifdef CONFIG_PROFILER
s->tb_count1++; /* includes aborted translations because of
exceptions */
ti = profile_getclock();
#endif
tcg_func_start(s);
#if 1 /* yclin */
code_marker_begin();
#endif
gen_intermediate_code(env, tb);
#if 1 /* yclin */
code_marker_end();
#endif
/* generate machine code */
gen_code_buf = tb->tc_ptr;
tb->tb_next_offset[0] = 0xffff;
tb->tb_next_offset[1] = 0xffff;
s->tb_next_offset = tb->tb_next_offset;
#ifdef USE_DIRECT_JUMP
s->tb_jmp_offset = tb->tb_jmp_offset;
s->tb_next = NULL;
#else
s->tb_jmp_offset = NULL;
s->tb_next = tb->tb_next;
#endif
#ifdef CONFIG_PROFILER
s->tb_count++;
s->interm_time += profile_getclock() - ti;
s->code_time -= profile_getclock();
#endif
gen_code_size = tcg_gen_code(s, gen_code_buf);
*gen_code_size_ptr = gen_code_size;
#ifdef CONFIG_PROFILER
s->code_time += profile_getclock();
s->code_in_len += tb->size;
s->code_out_len += gen_code_size;
#endif
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) {
qemu_log("OUT: [size=%d]\n", *gen_code_size_ptr);
log_disas(tb->tc_ptr, *gen_code_size_ptr);
qemu_log("\n");
qemu_log_flush();
}
#endif
return 0;
}
/* CPUClass::reset() */
static void mb_cpu_reset(CPUState *s)
{
MicroBlazeCPU *cpu = MICROBLAZE_CPU(s);
MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu);
CPUMBState *env = &cpu->env;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
log_cpu_state(env, 0);
}
mcc->parent_reset(s);
memset(env, 0, offsetof(CPUMBState, breakpoints));
env->res_addr = RES_ADDR_NONE;
tlb_flush(env, 1);
/* Disable stack protector. */
env->shr = ~0;
env->pvr.regs[0] = PVR0_PVR_FULL_MASK \
| PVR0_USE_BARREL_MASK \
| PVR0_USE_DIV_MASK \
| PVR0_USE_HW_MUL_MASK \
| PVR0_USE_EXC_MASK \
| PVR0_USE_ICACHE_MASK \
| PVR0_USE_DCACHE_MASK \
| PVR0_USE_MMU \
| (0xb << 8);
env->pvr.regs[2] = PVR2_D_OPB_MASK \
| PVR2_D_LMB_MASK \
| PVR2_I_OPB_MASK \
| PVR2_I_LMB_MASK \
| PVR2_USE_MSR_INSTR \
| PVR2_USE_PCMP_INSTR \
| PVR2_USE_BARREL_MASK \
| PVR2_USE_DIV_MASK \
| PVR2_USE_HW_MUL_MASK \
| PVR2_USE_MUL64_MASK \
| PVR2_USE_FPU_MASK \
| PVR2_USE_FPU2_MASK \
| PVR2_FPU_EXC_MASK \
| 0;
env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */
env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17);
#if defined(CONFIG_USER_ONLY)
/* start in user mode with interrupts enabled. */
env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */
#else
env->sregs[SR_MSR] = 0;
mmu_init(&env->mmu);
env->mmu.c_mmu = 3;
env->mmu.c_mmu_tlb_access = 3;
env->mmu.c_mmu_zones = 16;
#endif
}
void cpu_reset(CPUState *env)
{
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
log_cpu_state(env, 0);
}
tlb_flush(env, 1);
/* reset cpu state */
memset(env, 0, offsetof(CPULM32State, breakpoints));
}
static unsigned int crisv10_decoder(DisasContext *dc)
{
unsigned int insn_len = 2;
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)))
tcg_gen_debug_insn_start(dc->pc);
/* Load a halfword onto the instruction register. */
dc->ir = lduw_code(dc->pc);
/* Now decode it. */
dc->opcode = EXTRACT_FIELD(dc->ir, 6, 9);
dc->mode = EXTRACT_FIELD(dc->ir, 10, 11);
dc->src = EXTRACT_FIELD(dc->ir, 0, 3);
dc->size = EXTRACT_FIELD(dc->ir, 4, 5);
dc->cond = dc->dst = EXTRACT_FIELD(dc->ir, 12, 15);
dc->postinc = EXTRACT_FIELD(dc->ir, 10, 10);
dc->clear_prefix = 1;
/* FIXME: What if this insn insn't 2 in length?? */
if (dc->src == 15 || dc->dst == 15)
tcg_gen_movi_tl(cpu_R[15], dc->pc + 2);
switch (dc->mode) {
case CRISV10_MODE_QIMMEDIATE:
insn_len = dec10_quick_imm(dc);
break;
case CRISV10_MODE_REG:
insn_len = dec10_reg(dc);
break;
case CRISV10_MODE_AUTOINC:
case CRISV10_MODE_INDIRECT:
insn_len = dec10_ind(dc);
break;
}
if (dc->clear_prefix && dc->tb_flags & PFIX_FLAG) {
dc->tb_flags &= ~PFIX_FLAG;
tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~PFIX_FLAG);
if (dc->tb_flags != dc->tb->flags) {
dc->cpustate_changed = 1;
}
}
/* CRISv10 locks out interrupts on dslots. */
if (dc->delayed_branch == 2) {
cris_lock_irq(dc);
}
return insn_len;
}
static void cpu_common_reset(CPUState *cpu)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
log_cpu_state(cpu, cc->reset_dump_flags);
}
cpu->exit_request = 0;
cpu->interrupt_request = 0;
cpu->current_tb = NULL;
cpu->halted = 0;
}
/* CPUClass::reset() */
static void sparc_cpu_reset(CPUState *s)
{
SPARCCPU *cpu = SPARC_CPU(s);
SPARCCPUClass *scc = SPARC_CPU_GET_CLASS(cpu);
CPUSPARCState *env = &cpu->env;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
log_cpu_state(env, 0);
}
scc->parent_reset(s);
memset(env, 0, offsetof(CPUSPARCState, breakpoints));
tlb_flush(env, 1);
env->cwp = 0;
#ifndef TARGET_SPARC64
env->wim = 1;
#endif
env->regwptr = env->regbase + (env->cwp * 16);
CC_OP = CC_OP_FLAGS;
#if defined(CONFIG_USER_ONLY)
#ifdef TARGET_SPARC64
env->cleanwin = env->nwindows - 2;
env->cansave = env->nwindows - 2;
env->pstate = PS_RMO | PS_PEF | PS_IE;
env->asi = 0x82; /* Primary no-fault */
#endif
#else
#if !defined(TARGET_SPARC64)
env->psret = 0;
env->psrs = 1;
env->psrps = 1;
#endif
#ifdef TARGET_SPARC64
env->pstate = PS_PRIV|PS_RED|PS_PEF|PS_AG;
env->hpstate = cpu_has_hypervisor(env) ? HS_PRIV : 0;
env->tl = env->maxtl;
cpu_tsptr(env)->tt = TT_POWER_ON_RESET;
env->lsu = 0;
#else
env->mmuregs[0] &= ~(MMU_E | MMU_NF);
env->mmuregs[0] |= env->def->mmu_bm;
#endif
env->pc = 0;
env->npc = env->pc + 4;
#endif
env->cache_control = 0;
}
void cpu_reset(CPUM68KState *env)
{
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
log_cpu_state(env, 0);
}
memset(env, 0, offsetof(CPUM68KState, breakpoints));
#if !defined (CONFIG_USER_ONLY)
env->sr = 0x2700;
#endif
m68k_switch_sp(env);
/* ??? FP regs should be initialized to NaN. */
env->cc_op = CC_OP_FLAGS;
/* TODO: We should set PC from the interrupt vector. */
env->pc = 0;
tlb_flush(env, 1);
}
/* CPUClass::reset() */
static void lm32_cpu_reset(CPUState *s)
{
LM32CPU *cpu = LM32_CPU(s);
LM32CPUClass *lcc = LM32_CPU_GET_CLASS(cpu);
CPULM32State *env = &cpu->env;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
log_cpu_state(env, 0);
}
lcc->parent_reset(s);
tlb_flush(env, 1);
/* reset cpu state */
memset(env, 0, offsetof(CPULM32State, breakpoints));
}
/* CPUClass::reset() */
static void mips_cpu_reset(CPUState *s)
{
MIPSCPU *cpu = MIPS_CPU(s);
MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(cpu);
CPUMIPSState *env = &cpu->env;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
log_cpu_state(env, 0);
}
mcc->parent_reset(s);
memset(env, 0, offsetof(CPUMIPSState, breakpoints));
tlb_flush(env, 1);
cpu_state_reset(env);
}
void cpu_reset(CPUAVR32State *env)
{
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset\n");
log_cpu_state(env, 0);
}
memset(env, 0, offsetof(CPUAVR32State, breakpoints));
#if defined (CONFIG_USER_ONLY)
env->sreg.sr = AVR32_SR_M_MASK & (AVR32_SR_M_APP << AVR32_SR_M_OFFSET);
/* SN: TBD - Should we enable interrupts?? */
#else
/* Supervisor mode with interrupts disabled. */
env->sreg.sr = (AVR32_SR_M_MASK & (AVR32_SR_M_SUP << AVR32_SR_M_OFFSET)) | AVR32_SR_GM_MASK | AVR32_SR_EM_MASK;
#endif
tlb_flush(env, 1);
}
/* CPUClass::reset() */
static void s390_cpu_reset(CPUState *s)
{
S390CPU *cpu = S390_CPU(s);
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
CPUS390XState *env = &cpu->env;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
log_cpu_state(env, 0);
}
scc->parent_reset(s);
memset(env, 0, offsetof(CPUS390XState, breakpoints));
/* FIXME: reset vector? */
tlb_flush(env, 1);
s390_add_running_cpu(env);
}
void cpu_reset(CPUSPARCState *env)
{
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
log_cpu_state(env, 0);
}
tlb_flush(env, 1);
env->cwp = 0;
#ifndef TARGET_SPARC64
env->wim = 1;
#endif
env->regwptr = env->regbase + (env->cwp * 16);
CC_OP = CC_OP_FLAGS;
#if defined(CONFIG_USER_ONLY)
#ifdef TARGET_SPARC64
env->cleanwin = env->nwindows - 2;
env->cansave = env->nwindows - 2;
env->pstate = PS_RMO | PS_PEF | PS_IE;
env->asi = 0x82; /* Primary no-fault */
#endif
#else
#if !defined(TARGET_SPARC64)
env->psret = 0;
env->psrs = 1;
env->psrps = 1;
#endif
#ifdef TARGET_SPARC64
env->pstate = PS_PRIV|PS_RED|PS_PEF|PS_AG;
env->hpstate = cpu_has_hypervisor(env) ? HS_PRIV : 0;
env->tl = env->maxtl;
cpu_tsptr(env)->tt = TT_POWER_ON_RESET;
env->lsu = 0;
#else
env->mmuregs[0] &= ~(MMU_E | MMU_NF);
env->mmuregs[0] |= env->def->mmu_bm;
#endif
env->pc = 0;
env->npc = env->pc + 4;
#endif
env->cache_control = 0;
}
/* CPUClass::reset() */
static void nios2_cpu_reset(CPUState *cs)
{
Nios2CPU *cpu = NIOS2_CPU(cs);
Nios2CPUClass *ncc = NIOS2_CPU_GET_CLASS(cpu);
CPUNios2State *env = &cpu->env;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", cs->cpu_index);
log_cpu_state(cs, 0);
}
ncc->parent_reset(cs);
memset(env->regs, 0, sizeof(uint32_t) * NUM_CORE_REGS);
env->regs[R_PC] = cpu->reset_addr;
#if defined(CONFIG_USER_ONLY)
/* Start in user mode with interrupts enabled. */
env->regs[CR_STATUS] = CR_STATUS_U | CR_STATUS_PIE;
#else
env->regs[CR_STATUS] = 0;
#endif
}
/* CPUClass::reset() */
static void m68k_cpu_reset(CPUState *s)
{
M68kCPU *cpu = M68K_CPU(s);
M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
CPUM68KState *env = &cpu->env;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
log_cpu_state(env, 0);
}
mcc->parent_reset(s);
memset(env, 0, offsetof(CPUM68KState, breakpoints));
#if !defined(CONFIG_USER_ONLY)
env->sr = 0x2700;
#endif
m68k_switch_sp(env);
/* ??? FP regs should be initialized to NaN. */
env->cc_op = CC_OP_FLAGS;
/* TODO: We should set PC from the interrupt vector. */
env->pc = 0;
tlb_flush(env, 1);
}
int cpu_exec(CPUArchState *env)
{
int ret;
TranslationBlock *tb;
uint8_t *tc_ptr;
Stub_obj *cc_stub;
tcg_target_ulong prev_tb;
env->exception_index = -1;
/* prepare setjmp context for exception handling */
for(;;) {
if (setjmp(env->jmp_env) == 0) {
/* if an exception is pending, we execute it here */
if (env->exception_index >= 0) {
/* if user mode only, we simulate a fake exception
which will be handled outside the cpu execution
loop */
ret = env->exception_index;
break;
}
prev_tb = 0; /* force lookup of first TB */
for(;;) {
#if defined(DEBUG_DISAS) || defined(CONFIG_DEBUG_EXEC)
if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
/* restore flags in standard format */
log_cpu_state(env, 0);
}
#endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */
tb = tb_find_fast(env);
#ifdef CONFIG_DEBUG_EXEC
qemu_log_mask(CPU_LOG_EXEC, "Trace %p [" TARGET_FMT_lx "] %s\n",
tb->tc_ptr, tb->pc,
lookup_symbol(tb->pc));
#endif
/* see if we can patch the calling TB. When the TB
spans two pages, we cannot safely do a direct
jump. */
if (prev_tb != 0 && tb->page_addr[1] == -1) {
// tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb);
}
/* cpu_interrupt might be called while translating the
TB, but before it is linked into a potentially
infinite loop and becomes env->current_tb. Avoid
starting execution if there is a pending interrupt. */
env->current_tb = tb;
/* the prologue is arm-mode */
*env->cpsr = *env->cpsr & ~(1 << 5);
/* in prologue, use [bx (tc_ptr | env->thumb)] to detemine
* the cpu mode dynamicly
*/
tc_ptr = (uint32_t)tb->tc_ptr | env->thumb;
if (tb->pc == 0x0003fcd8) {
fprintf(stderr, "tb->pc is 0x00011824. @%s\n", __FUNCTION__);
}
/* execute the generated code */
fprintf(stderr, "tb->pc is. @%x\n", tb->pc);
cc_stub = tcg_qemu_tb_exec(env, tc_ptr);
/* handle cc_stub */
*env->tpc = cc_stub->next_pc & ~1;
env->prev_tb = cc_stub->prev_tb;
if (((struct TranslationBlock *)env->prev_tb)->may_change_state &&
((struct TranslationBlock *)env->prev_tb)->change_state_addr == cc_stub) {
env->thumb = cc_stub->next_pc & 1;
}
prev_tb = env->prev_tb;
if (*env->tpc == 0x00011e90) {
fprintf(stderr, "*env->tpc is 0x00011824. @%s\n", __FUNCTION__);
}
env->current_tb = NULL;
} /* for(;;) */
}
} /* for(;;) */
return ret;
}
void sparc_cpu_do_interrupt(CPUState *cs)
{
SPARCCPU *cpu = SPARC_CPU(cs);
CPUSPARCState *env = &cpu->env;
int intno = cs->exception_index;
trap_state *tsptr;
/* Compute PSR before exposing state. */
if (env->cc_op != CC_OP_FLAGS) {
cpu_get_psr(env);
}
#ifdef DEBUG_PCALL
if (qemu_loglevel_mask(CPU_LOG_INT)) {
static int count;
const char *name;
if (intno < 0 || intno >= 0x180) {
name = "Unknown";
} else if (intno >= 0x100) {
name = "Trap Instruction";
} else if (intno >= 0xc0) {
name = "Window Fill";
} else if (intno >= 0x80) {
name = "Window Spill";
} else {
name = excp_names[intno];
if (!name) {
name = "Unknown";
}
}
qemu_log("%6d: %s (v=%04x)\n", count, name, intno);
log_cpu_state(cs, 0);
#if 0
{
int i;
uint8_t *ptr;
qemu_log(" code=");
ptr = (uint8_t *)env->pc;
for (i = 0; i < 16; i++) {
qemu_log(" %02x", ldub(ptr + i));
}
qemu_log("\n");
}
#endif
count++;
}
#endif
#if !defined(CONFIG_USER_ONLY)
if (env->tl >= env->maxtl) {
cpu_abort(cs, "Trap 0x%04x while trap level (%d) >= MAXTL (%d),"
" Error state", cs->exception_index, env->tl, env->maxtl);
return;
}
#endif
if (env->tl < env->maxtl - 1) {
env->tl++;
} else {
env->pstate |= PS_RED;
if (env->tl < env->maxtl) {
env->tl++;
}
}
tsptr = cpu_tsptr(env);
tsptr->tstate = (cpu_get_ccr(env) << 32) |
((env->asi & 0xff) << 24) | ((env->pstate & 0xf3f) << 8) |
cpu_get_cwp64(env);
tsptr->tpc = env->pc;
tsptr->tnpc = env->npc;
tsptr->tt = intno;
switch (intno) {
case TT_IVEC:
cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_IG);
break;
case TT_TFAULT:
case TT_DFAULT:
case TT_TMISS ... TT_TMISS + 3:
case TT_DMISS ... TT_DMISS + 3:
case TT_DPROT ... TT_DPROT + 3:
cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_MG);
break;
default:
cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_AG);
break;
}
if (intno == TT_CLRWIN) {
cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - 1));
} else if ((intno & 0x1c0) == TT_SPILL) {
cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2));
} else if ((intno & 0x1c0) == TT_FILL) {
cpu_set_cwp(env, cpu_cwp_inc(env, env->cwp + 1));
}
env->tbr &= ~0x7fffULL;
env->tbr |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5);
env->pc = env->tbr;
env->npc = env->pc + 4;
cs->exception_index = -1;
}
/* NOTE: must be called outside the CPU execute loop */
void cpu_reset(CPUX86State *env)
{
int i;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
log_cpu_state(env, X86_DUMP_FPU | X86_DUMP_CCOP);
}
memset(env, 0, offsetof(CPUX86State, breakpoints));
tlb_flush(env, 1);
env->old_exception = -1;
/* init to reset state */
#ifdef CONFIG_SOFTMMU
env->hflags |= HF_SOFTMMU_MASK;
#endif
env->hflags2 |= HF2_GIF_MASK;
cpu_x86_update_cr0(env, 0x60000010);
env->a20_mask = ~0x0;
env->smbase = 0x30000;
env->idt.limit = 0xffff;
env->gdt.limit = 0xffff;
env->ldt.limit = 0xffff;
env->ldt.flags = DESC_P_MASK | (2 << DESC_TYPE_SHIFT);
env->tr.limit = 0xffff;
env->tr.flags = DESC_P_MASK | (11 << DESC_TYPE_SHIFT);
cpu_x86_load_seg_cache(env, R_CS, 0xf000, 0xffff0000, 0xffff,
DESC_P_MASK | DESC_S_MASK | DESC_CS_MASK |
DESC_R_MASK | DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
env->eip = 0xfff0;
env->regs[R_EDX] = env->cpuid_version;
env->eflags = 0x2;
/* FPU init */
for(i = 0;i < 8; i++)
env->fptags[i] = 1;
env->fpuc = 0x37f;
env->mxcsr = 0x1f80;
memset(env->dr, 0, sizeof(env->dr));
env->dr[6] = DR6_FIXED_1;
env->dr[7] = DR7_FIXED_1;
cpu_breakpoint_remove_all(env, BP_CPU);
cpu_watchpoint_remove_all(env, BP_CPU);
env->mcg_status = 0;
}
/* generate intermediate code for basic block 'tb'. */
void gen_intermediate_code(CPULM32State *env, struct TranslationBlock *tb)
{
LM32CPU *cpu = lm32_env_get_cpu(env);
CPUState *cs = CPU(cpu);
struct DisasContext ctx, *dc = &ctx;
uint32_t pc_start;
uint32_t next_page_start;
int num_insns;
int max_insns;
pc_start = tb->pc;
dc->features = cpu->features;
dc->num_breakpoints = cpu->num_breakpoints;
dc->num_watchpoints = cpu->num_watchpoints;
dc->tb = tb;
dc->is_jmp = DISAS_NEXT;
dc->pc = pc_start;
dc->singlestep_enabled = cs->singlestep_enabled;
if (pc_start & 3) {
qemu_log_mask(LOG_GUEST_ERROR,
"unaligned PC=%x. Ignoring lowest bits.\n", pc_start);
pc_start &= ~3;
}
next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
num_insns = 0;
max_insns = tb->cflags & CF_COUNT_MASK;
if (max_insns == 0) {
max_insns = CF_COUNT_MASK;
}
if (max_insns > TCG_MAX_INSNS) {
max_insns = TCG_MAX_INSNS;
}
gen_tb_start(tb);
do {
tcg_gen_insn_start(dc->pc);
num_insns++;
if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) {
tcg_gen_movi_tl(cpu_pc, dc->pc);
t_gen_raise_exception(dc, EXCP_DEBUG);
dc->is_jmp = DISAS_UPDATE;
/* The address covered by the breakpoint must be included in
[tb->pc, tb->pc + tb->size) in order to for it to be
properly cleared -- thus we increment the PC here so that
the logic setting tb->size below does the right thing. */
dc->pc += 4;
break;
}
/* Pretty disas. */
LOG_DIS("%8.8x:\t", dc->pc);
if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) {
gen_io_start();
}
decode(dc, cpu_ldl_code(env, dc->pc));
dc->pc += 4;
} while (!dc->is_jmp
&& !tcg_op_buf_full()
&& !cs->singlestep_enabled
&& !singlestep
&& (dc->pc < next_page_start)
&& num_insns < max_insns);
if (tb->cflags & CF_LAST_IO) {
gen_io_end();
}
if (unlikely(cs->singlestep_enabled)) {
if (dc->is_jmp == DISAS_NEXT) {
tcg_gen_movi_tl(cpu_pc, dc->pc);
}
t_gen_raise_exception(dc, EXCP_DEBUG);
} else {
switch (dc->is_jmp) {
case DISAS_NEXT:
gen_goto_tb(dc, 1, dc->pc);
break;
default:
case DISAS_JUMP:
case DISAS_UPDATE:
/* indicate that the hash table must be used
to find the next TB */
tcg_gen_exit_tb(0);
break;
case DISAS_TB_JUMP:
/* nothing more to generate */
break;
}
}
gen_tb_end(tb, num_insns);
tb->size = dc->pc - pc_start;
tb->icount = num_insns;
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
qemu_log("\n");
log_target_disas(cs, pc_start, dc->pc - pc_start, 0);
qemu_log("\nisize=%d osize=%d\n",
dc->pc - pc_start, tcg_op_buf_count());
}
#endif
}
/* 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;
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
log_cpu_state(env, 0);
}
acc->parent_reset(s);
memset(env, 0, offsetof(CPUARMState, breakpoints));
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;
if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q';
}
#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 | CPSR_A | CPSR_F | CPSR_I;
/* 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->uncached_cpsr &= ~CPSR_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);
pc = ldl_p(rom + 4);
env->thumb = pc & 1;
env->regs[15] = pc & ~1;
}
}
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(env, 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);
}
void do_interrupt(CPUState *env)
{
int cwp, intno = env->exception_index;
#ifdef DEBUG_PCALL
if (qemu_loglevel_mask(CPU_LOG_INT)) {
static int count;
const char *name;
if (intno < 0 || intno >= 0x100) {
name = "Unknown";
} else if (intno >= 0x80) {
name = "Trap Instruction";
} else {
name = excp_names[intno];
if (!name) {
name = "Unknown";
}
}
qemu_log("%6d: %s (v=%02x) pc=%08x npc=%08x SP=%08x\n",
count, name, intno,
env->pc,
env->npc, env->regwptr[6]);
log_cpu_state(env, 0);
#if 0
{
int i;
uint8_t *ptr;
qemu_log(" code=");
ptr = (uint8_t *)env->pc;
for (i = 0; i < 16; i++) {
qemu_log(" %02x", ldub(ptr + i));
}
qemu_log("\n");
}
#endif
count++;
}
#endif
#if !defined(CONFIG_USER_ONLY)
if (env->psret == 0) {
cpu_abort(env, "Trap 0x%02x while interrupts disabled, Error state",
env->exception_index);
return;
}
#endif
env->psret = 0;
cwp = cpu_cwp_dec(env, env->cwp - 1);
cpu_set_cwp(env, cwp);
env->regwptr[9] = env->pc;
env->regwptr[10] = env->npc;
env->psrps = env->psrs;
env->psrs = 1;
env->tbr = (env->tbr & TBR_BASE_MASK) | (intno << 4);
env->pc = env->tbr;
env->npc = env->pc + 4;
env->exception_index = -1;
#if !defined(CONFIG_USER_ONLY)
/* IRQ acknowledgment */
if ((intno & ~15) == TT_EXTINT && env->qemu_irq_ack != NULL) {
env->qemu_irq_ack(env->irq_manager, intno);
}
#endif
}
void sparc_cpu_do_interrupt(CPUState *cs)
{
SPARCCPU *cpu = SPARC_CPU(cs);
CPUSPARCState *env = &cpu->env;
int cwp, intno = cs->exception_index;
/* Compute PSR before exposing state. */
if (env->cc_op != CC_OP_FLAGS) {
cpu_get_psr(env);
}
#ifdef DEBUG_PCALL
if (qemu_loglevel_mask(CPU_LOG_INT)) {
static int count;
const char *name;
if (intno < 0 || intno >= 0x100) {
name = "Unknown";
} else if (intno >= 0x80) {
name = "Trap Instruction";
} else {
name = excp_names[intno];
if (!name) {
name = "Unknown";
}
}
qemu_log("%6d: %s (v=%02x)\n", count, name, intno);
log_cpu_state(cs, 0);
#if 0
{
int i;
uint8_t *ptr;
qemu_log(" code=");
ptr = (uint8_t *)env->pc;
for (i = 0; i < 16; i++) {
qemu_log(" %02x", ldub(ptr + i));
}
qemu_log("\n");
}
#endif
count++;
}
#endif
#if !defined(CONFIG_USER_ONLY)
if (env->psret == 0) {
if (cs->exception_index == 0x80 &&
env->def->features & CPU_FEATURE_TA0_SHUTDOWN) {
qemu_system_shutdown_request();
} else {
cpu_abort(cs, "Trap 0x%02x while interrupts disabled, Error state",
cs->exception_index);
}
return;
}
#endif
env->psret = 0;
cwp = cpu_cwp_dec(env, env->cwp - 1);
cpu_set_cwp(env, cwp);
env->regwptr[9] = env->pc;
env->regwptr[10] = env->npc;
env->psrps = env->psrs;
env->psrs = 1;
env->tbr = (env->tbr & TBR_BASE_MASK) | (intno << 4);
env->pc = env->tbr;
env->npc = env->pc + 4;
cs->exception_index = -1;
#if !defined(CONFIG_USER_ONLY)
/* IRQ acknowledgment */
if ((intno & ~15) == TT_EXTINT && env->qemu_irq_ack != NULL) {
env->qemu_irq_ack(env, env->irq_manager, intno);
}
#endif
}
/* generate intermediate code for basic block 'tb'. */
static void gen_intermediate_code_internal(
CPUNios2State *env, TranslationBlock *tb, int search_pc)
{
DisasContext dc1, *dc = &dc1;
int num_insns;
int max_insns;
uint32_t next_page_start;
int j, lj = -1;
uint16_t *gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
/* Initialize DC */
dc->env = env;
dc->cpu_R = cpu_R;
dc->is_jmp = DISAS_NEXT;
dc->pc = tb->pc;
dc->tb = tb;
/* Dump the CPU state to the log */
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
qemu_log("--------------\n");
log_cpu_state(env, 0);
}
/* Set up instruction counts */
num_insns = 0;
max_insns = tb->cflags & CF_COUNT_MASK;
if (max_insns == 0) {
max_insns = CF_COUNT_MASK;
}
next_page_start = (tb->pc & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
gen_icount_start();
do {
/* Mark instruction start with associated PC */
if (search_pc) {
j = gen_opc_ptr - gen_opc_buf;
if (lj < j) {
lj++;
while (lj < j) {
gen_opc_instr_start[lj++] = 0;
}
}
gen_opc_pc[lj] = dc->pc;
gen_opc_instr_start[lj] = 1;
gen_opc_icount[lj] = num_insns;
}
LOG_DIS("%8.8x:\t", dc->pc);
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) {
gen_io_start();
}
/* Decode an instruction */
handle_instruction(dc);
dc->pc += 4;
num_insns++;
/* Translation stops when a conditional branch is encountered.
* Otherwise the subsequent code could get translated several times.
* Also stop translation when a page boundary is reached. This
* ensures prefetch aborts occur at the right place. */
} while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
!env->singlestep_enabled &&
!singlestep &&
dc->pc < next_page_start &&
num_insns < max_insns);
if (tb->cflags & CF_LAST_IO) {
gen_io_end();
}
/* Indicate where the next block should start */
switch (dc->is_jmp) {
case DISAS_NEXT:
/* Save the current PC back into the CPU register */
tcg_gen_movi_tl(cpu_R[R_PC], dc->pc);
tcg_gen_exit_tb(0);
break;
default:
case DISAS_JUMP:
case DISAS_UPDATE:
/* The jump will already have updated the PC register */
tcg_gen_exit_tb(0);
break;
case DISAS_TB_JUMP:
/* nothing more to generate */
break;
}
/* End off the block */
gen_icount_end(tb, num_insns);
*gen_opc_ptr = INDEX_op_end;
/* Mark instruction starts for the final generated instruction */
if (search_pc) {
j = gen_opc_ptr - gen_opc_buf;
lj++;
while (lj <= j) {
gen_opc_instr_start[lj++] = 0;
}
} else {
tb->size = dc->pc - tb->pc;
tb->icount = num_insns;
}
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
qemu_log("----------------\n");
qemu_log("IN: %s\n", lookup_symbol(tb->pc));
log_target_disas(tb->pc, dc->pc - tb->pc, 0);
qemu_log("\nisize=%d osize=%td\n",
dc->pc - tb->pc, gen_opc_ptr - gen_opc_buf);
}
#endif
}
/* return non zero if the very first instruction is invalid so that
the virtual CPU can trigger an exception.
'*gen_code_size_ptr' contains the size of the generated code (host
code).
*/
int cpu_gen_code(CPUState *env, TranslationBlock *tb, int *gen_code_size_ptr)
{
TCGContext *s = tcg_ctx_env;
uint8_t *gen_code_buf;
int gen_code_size;
#ifdef CONFIG_PROFILER
int64_t ti;
#endif
#ifdef CONFIG_PROFILER
s->tb_count1++; /* includes aborted translations because of
exceptions */
ti = profile_getclock();
#endif
#if defined(CONFIG_HYBRID)
int64_t start_cycle = 0, end_cycle = 0;
if (llvm_profile_enabled)
start_cycle = cpu_get_real_ticks();
#endif
tcg_func_start(env, s);
gen_intermediate_code(env, tb);
/* generate machine code */
s->tb = tb;
gen_code_buf = tb->tc_ptr;
tb->tb_next_offset[0] = 0xffff;
tb->tb_next_offset[1] = 0xffff;
s->tb_next_offset = tb->tb_next_offset;
#ifdef USE_DIRECT_JUMP
s->tb_jmp_offset = tb->tb_jmp_offset;
s->tb_next = NULL;
#else
s->tb_jmp_offset = NULL;
s->tb_next = tb->tb_next;
#endif
#ifdef CONFIG_PROFILER
s->tb_count++;
s->interm_time += profile_getclock() - ti;
s->code_time -= profile_getclock();
#endif
#if defined(CONFIG_LLVM) && !defined(CONFIG_HYBRID)
gen_code_size = llvm_gen_block(env, s, tb);
#else
gen_code_size = tcg_gen_code(s, gen_code_buf);
#endif
*gen_code_size_ptr = gen_code_size;
#ifdef CONFIG_PROFILER
s->code_time += profile_getclock();
s->code_in_len += tb->size;
s->code_out_len += gen_code_size;
#endif
#if defined(CONFIG_HYBRID)
if (llvm_profile_enabled) {
end_cycle = cpu_get_real_ticks();
llvm_tb_record(tb, gen_code_size, end_cycle-start_cycle);
}
#endif
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) {
qemu_log("OUT: [size=%d]\n", *gen_code_size_ptr);
log_disas(tb->tc_ptr, *gen_code_size_ptr);
qemu_log("\n");
qemu_log_flush();
}
#endif
return 0;
}
