void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
int is_asi, int size)
{
CPUState *saved_env;
if (!cpu_single_env) {
/* XXX: ??? */
return;
}
/* XXX: hack to restore env in all cases, even if not called from
generated code */
saved_env = env;
env = cpu_single_env;
qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
addr, is_write, is_exec);
if (!(env->sregs[SR_MSR] & MSR_EE)) {
env = saved_env;
return;
}
env->sregs[SR_EAR] = addr;
if (is_exec) {
if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
helper_raise_exception(EXCP_HW_EXCP);
}
} else {
if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
helper_raise_exception(EXCP_HW_EXCP);
}
}
env = saved_env;
}
void cpu_unassigned_access(CPUState *env1, target_phys_addr_t addr,
int is_write, int is_exec, int is_asi, int size)
{
CPUState *saved_env;
saved_env = env;
env = env1;
qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
addr, is_write, is_exec);
if (!(env->sregs[SR_MSR] & MSR_EE)) {
env = saved_env;
return;
}
env->sregs[SR_EAR] = addr;
if (is_exec) {
if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
helper_raise_exception(EXCP_HW_EXCP);
}
} else {
if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
helper_raise_exception(EXCP_HW_EXCP);
}
}
env = saved_env;
}
void mb_cpu_unassigned_access(CPUState *cs, hwaddr addr,
bool is_write, bool is_exec, int is_asi,
unsigned size)
{
MicroBlazeCPU *cpu;
CPUMBState *env;
qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
addr, is_write ? 1 : 0, is_exec ? 1 : 0);
if (cs == NULL) {
return;
}
cpu = MICROBLAZE_CPU(cs);
env = &cpu->env;
if (!(env->sregs[SR_MSR] & MSR_EE)) {
return;
}
env->sregs[SR_EAR] = addr;
if (is_exec) {
if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
helper_raise_exception(env, EXCP_HW_EXCP);
}
} else {
if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
helper_raise_exception(env, EXCP_HW_EXCP);
}
}
}
void helper_rett(CPUSPARCState *env)
{
unsigned int cwp;
if (env->psret == 1) {
helper_raise_exception(env, TT_ILL_INSN);
}
env->psret = 1;
cwp = cpu_cwp_inc(env, env->cwp + 1) ;
if (env->wim & (1 << cwp)) {
helper_raise_exception(env, TT_WIN_UNF);
}
cpu_set_cwp(env, cwp);
env->psrs = env->psrps;
}
static target_ulong helper_udiv_common(CPUSPARCState *env, target_ulong a,
target_ulong b, int cc)
{
int overflow = 0;
uint64_t x0;
uint32_t x1;
x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32);
x1 = (b & 0xffffffff);
if (x1 == 0) {
cpu_restore_state2(env, GETPC());
helper_raise_exception(env, TT_DIV_ZERO);
}
x0 = x0 / x1;
if (x0 > 0xffffffff) {
x0 = 0xffffffff;
overflow = 1;
}
if (cc) {
env->cc_dst = x0;
env->cc_src2 = overflow;
env->cc_op = CC_OP_DIV;
}
return x0;
}
target_ulong helper_tsubcctv(CPUSPARCState *env, target_ulong src1,
target_ulong src2)
{
target_ulong dst;
/* Tag overflow occurs if either input has bits 0 or 1 set. */
if ((src1 | src2) & 3) {
goto tag_overflow;
}
dst = src1 - src2;
/* Tag overflow occurs if the subtraction overflows. */
if ((src1 ^ src2) & (src1 ^ dst) & (1u << 31)) {
goto tag_overflow;
}
/* Only modify the CC after any exceptions have been generated. */
env->cc_op = CC_OP_TSUBTV;
env->cc_src = src1;
env->cc_src2 = src2;
env->cc_dst = dst;
return dst;
tag_overflow:
cpu_restore_state2(env, GETPC());
helper_raise_exception(env, TT_TOVF);
}
void helper_rett(void)
{
unsigned int cwp;
if (env->psret == 1) {
helper_raise_exception(env, TT_ILL_INSN);
}
env->psret = 1;
cwp = cwp_inc(env->cwp + 1) ;
if (env->wim & (1 << cwp)) {
helper_raise_exception(env, TT_WIN_UNF);
}
set_cwp(cwp);
env->psrs = env->psrps;
}
void helper_wrpsr(CPUSPARCState *env, target_ulong new_psr)
{
if ((new_psr & PSR_CWP) >= env->nwindows) {
helper_raise_exception(env, TT_ILL_INSN);
} else {
cpu_put_psr(env, new_psr);
}
}
uint64_t helper_udivx(CPUSPARCState *env, uint64_t a, uint64_t b)
{
if (b == 0) {
/* Raise divide by zero trap. */
cpu_restore_state2(env, GETPC());
helper_raise_exception(env, TT_DIV_ZERO);
}
return a / b;
}
/* XXX: use another pointer for %iN registers to avoid slow wrapping
handling ? */
void helper_save(CPUSPARCState *env)
{
uint32_t cwp;
cwp = cpu_cwp_dec(env, env->cwp - 1);
if (env->wim & (1 << cwp)) {
helper_raise_exception(env, TT_WIN_OVF);
}
cpu_set_cwp(env, cwp);
}
/* XXX: use another pointer for %iN registers to avoid slow wrapping
handling ? */
void helper_save(void)
{
uint32_t cwp;
cwp = cwp_dec(env->cwp - 1);
if (env->wim & (1 << cwp)) {
helper_raise_exception(env, TT_WIN_OVF);
}
set_cwp(cwp);
}
void helper_memalign(uint32_t addr, uint32_t dr, uint32_t wr, uint32_t mask)
{
if (addr & mask) {
qemu_log("unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
addr, mask, wr, dr);
env->regs[CR_BADADDR] = addr;
env->regs[CR_EXCEPTION] = EXCP_UNALIGN << 2;
helper_raise_exception(EXCP_UNALIGN);
}
}
void helper_stackprot(uint32_t addr)
{
if (addr < env->slr || addr > env->shr) {
qemu_log("Stack protector violation at %x %x %x\n",
addr, env->slr, env->shr);
env->sregs[SR_EAR] = addr;
env->sregs[SR_ESR] = ESR_EC_STACKPROT;
helper_raise_exception(EXCP_HW_EXCP);
}
}
void helper_restore(CPUSPARCState *env)
{
uint32_t cwp;
cwp = cpu_cwp_inc(env, env->cwp + 1);
if (env->wim & (1 << cwp)) {
helper_raise_exception(env, TT_WIN_UNF);
}
cpu_set_cwp(env, cwp);
}
void helper_restore(void)
{
uint32_t cwp;
cwp = cwp_inc(env->cwp + 1);
if (env->wim & (1 << cwp)) {
helper_raise_exception(env, TT_WIN_UNF);
}
set_cwp(cwp);
}
void helper_stackprot(CPUMBState *env, uint32_t addr)
{
if (addr < env->slr || addr > env->shr) {
qemu_log_mask(CPU_LOG_INT, "Stack protector violation at %x %x %x\n",
addr, env->slr, env->shr);
env->sregs[SR_EAR] = addr;
env->sregs[SR_ESR] = ESR_EC_STACKPROT;
helper_raise_exception(env, EXCP_HW_EXCP);
}
}
void cpu_unassigned_access(CPUMBState *env, hwaddr addr,
int is_write, int is_exec, int is_asi, int size)
{
qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
addr, is_write, is_exec);
if (!env || !(env->sregs[SR_MSR] & MSR_EE)) {
return;
}
env->sregs[SR_EAR] = addr;
if (is_exec) {
if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
helper_raise_exception(env, EXCP_HW_EXCP);
}
} else {
if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
helper_raise_exception(env, EXCP_HW_EXCP);
}
}
}
int64_t helper_sdivx(CPUSPARCState *env, int64_t a, int64_t b)
{
if (b == 0) {
/* Raise divide by zero trap. */
cpu_restore_state2(env, GETPC());
helper_raise_exception(env, TT_DIV_ZERO);
} else if (b == -1) {
/* Avoid overflow trap with i386 divide insn. */
return -a;
} else {
return a / b;
}
}
static inline int div_prepare(CPUMBState *env, uint32_t a, uint32_t b)
{
if (b == 0) {
env->sregs[SR_MSR] |= MSR_DZ;
if ((env->sregs[SR_MSR] & MSR_EE)
&& !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
env->sregs[SR_ESR] = ESR_EC_DIVZERO;
helper_raise_exception(env, EXCP_HW_EXCP);
}
return 0;
}
env->sregs[SR_MSR] &= ~MSR_DZ;
return 1;
}
void helper_memalign(uint32_t addr, uint32_t dr, uint32_t wr, uint32_t mask)
{
if (addr & mask) {
qemu_log_mask(CPU_LOG_INT,
"unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
addr, mask, wr, dr);
env->sregs[SR_EAR] = addr;
env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \
| (dr & 31) << 5;
if (mask == 3) {
env->sregs[SR_ESR] |= 1 << 11;
}
if (!(env->sregs[SR_MSR] & MSR_EE)) {
return;
}
helper_raise_exception(EXCP_HW_EXCP);
}
}
/* raise FPU exception. */
static void raise_fpu_exception(CPUMBState *env)
{
env->sregs[SR_ESR] = ESR_EC_FPU;
helper_raise_exception(env, EXCP_HW_EXCP);
}
/* raise FPU exception. */
static void raise_fpu_exception(void)
{
env->sregs[SR_ESR] = ESR_EC_FPU;
helper_raise_exception(EXCP_HW_EXCP);
}