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target/microblaze: Split out MSR from env->sregs 

Continue eliminating the sregs array in favor of individual members.
Does not correct the width of MSR, yet.

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-08-19 21:41:10 -07:00
parent 76e8187d00
commit 2e5282caa8
6 changed files with 51 additions and 49 deletions
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4
target/microblaze/cpu.c
View File

@ -121,9 +121,9 @@ static void mb_cpu_reset(DeviceState *dev)
#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->msr = MSR_EE | MSR_IE | MSR_VM | MSR_UM;
#else
env->sregs[SR_MSR] = 0;
env->msr = 0;
mmu_init(&env->mmu);
env->mmu.c_mmu = 3;
env->mmu.c_mmu_tlb_access = 3;

7
target/microblaze/cpu.h
View File

@ -237,6 +237,7 @@ struct CPUMBState {
uint32_t imm;
uint32_t regs[32];
uint64_t pc;
uint64_t msr;
uint64_t sregs[14];
float_status fp_status;
/* Stack protectors. Yes, it's a hw feature. */
@ -355,7 +356,7 @@ static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc,
*pc = env->pc;
*cs_base = 0;
*flags = (env->iflags & IFLAGS_TB_MASK) |
(env->sregs[SR_MSR] & (MSR_UM | MSR_VM | MSR_EE));
(env->msr & (MSR_UM | MSR_VM | MSR_EE));
}
#if !defined(CONFIG_USER_ONLY)
@ -370,11 +371,11 @@ static inline int cpu_mmu_index(CPUMBState *env, bool ifetch)
MicroBlazeCPU *cpu = env_archcpu(env);
/* Are we in nommu mode?. */
if (!(env->sregs[SR_MSR] & MSR_VM) || !cpu->cfg.use_mmu) {
if (!(env->msr & MSR_VM) || !cpu->cfg.use_mmu) {
return MMU_NOMMU_IDX;
}
if (env->sregs[SR_MSR] & MSR_UM) {
if (env->msr & MSR_UM) {
return MMU_USER_IDX;
}
return MMU_KERNEL_IDX;

4
target/microblaze/gdbstub.c
View File

@ -62,7 +62,7 @@ int mb_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
val = env->pc;
break;
case GDB_MSR:
val = env->sregs[SR_MSR];
val = env->msr;
break;
case GDB_EAR:
val = env->sregs[SR_EAR];
@ -118,7 +118,7 @@ int mb_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
env->pc = tmp;
break;
case GDB_MSR:
env->sregs[SR_MSR] = tmp;
env->msr = tmp;
break;
case GDB_EAR:
env->sregs[SR_EAR] = tmp;

49
target/microblaze/helper.c
View File

@ -117,7 +117,7 @@ void mb_cpu_do_interrupt(CPUState *cs)
/* IMM flag cannot propagate across a branch and into the dslot. */
assert(!((env->iflags & D_FLAG) && (env->iflags & IMM_FLAG)));
assert(!(env->iflags & (DRTI_FLAG | DRTE_FLAG | DRTB_FLAG)));
/* assert(env->sregs[SR_MSR] & (MSR_EE)); Only for HW exceptions. */
/* assert(env->msr & (MSR_EE)); Only for HW exceptions. */
env->res_addr = RES_ADDR_NONE;
switch (cs->exception_index) {
case EXCP_HW_EXCP:
@ -136,11 +136,11 @@ void mb_cpu_do_interrupt(CPUState *cs)
}
/* Disable the MMU. */
t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
env->sregs[SR_MSR] |= t;
t = (env->msr & (MSR_VM | MSR_UM)) << 1;
env->msr &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
env->msr |= t;
/* Exception in progress. */
env->sregs[SR_MSR] |= MSR_EIP;
env->msr |= MSR_EIP;
qemu_log_mask(CPU_LOG_INT,
"hw exception at pc=%" PRIx64 " ear=%" PRIx64 " "
@ -179,11 +179,11 @@ void mb_cpu_do_interrupt(CPUState *cs)
}
/* Disable the MMU. */
t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
env->sregs[SR_MSR] |= t;
t = (env->msr & (MSR_VM | MSR_UM)) << 1;
env->msr &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
env->msr |= t;
/* Exception in progress. */
env->sregs[SR_MSR] |= MSR_EIP;
env->msr |= MSR_EIP;
qemu_log_mask(CPU_LOG_INT,
"exception at pc=%" PRIx64 " ear=%" PRIx64 " "
@ -195,11 +195,11 @@ void mb_cpu_do_interrupt(CPUState *cs)
break;
case EXCP_IRQ:
assert(!(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP)));
assert(env->sregs[SR_MSR] & MSR_IE);
assert(!(env->msr & (MSR_EIP | MSR_BIP)));
assert(env->msr & MSR_IE);
assert(!(env->iflags & D_FLAG));
t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
t = (env->msr & (MSR_VM | MSR_UM)) << 1;
#if 0
#include "disas/disas.h"
@ -216,7 +216,7 @@ void mb_cpu_do_interrupt(CPUState *cs)
qemu_log(
"interrupt at pc=%x msr=%x %x iflags=%x sym=%s\n",
env->pc, env->sregs[SR_MSR], t, env->iflags,
env->pc, env->msr, t, env->iflags,
sym);
log_cpu_state(cs, 0);
@ -226,11 +226,10 @@ void mb_cpu_do_interrupt(CPUState *cs)
qemu_log_mask(CPU_LOG_INT,
"interrupt at pc=%" PRIx64 " msr=%" PRIx64 " %x "
"iflags=%x\n",
env->pc, env->sregs[SR_MSR], t, env->iflags);
env->pc, env->msr, t, env->iflags);
env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM \
| MSR_UM | MSR_IE);
env->sregs[SR_MSR] |= t;
env->msr &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM | MSR_IE);
env->msr |= t;
env->regs[14] = env->pc;
env->pc = cpu->cfg.base_vectors + 0x10;
@ -241,18 +240,18 @@ void mb_cpu_do_interrupt(CPUState *cs)
case EXCP_HW_BREAK:
assert(!(env->iflags & IMM_FLAG));
assert(!(env->iflags & D_FLAG));
t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
t = (env->msr & (MSR_VM | MSR_UM)) << 1;
qemu_log_mask(CPU_LOG_INT,
"break at pc=%" PRIx64 " msr=%" PRIx64 " %x "
"iflags=%x\n",
env->pc, env->sregs[SR_MSR], t, env->iflags);
env->pc, env->msr, t, env->iflags);
log_cpu_state_mask(CPU_LOG_INT, cs, 0);
env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
env->sregs[SR_MSR] |= t;
env->sregs[SR_MSR] |= MSR_BIP;
env->msr &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
env->msr |= t;
env->msr |= MSR_BIP;
if (cs->exception_index == EXCP_HW_BREAK) {
env->regs[16] = env->pc;
env->sregs[SR_MSR] |= MSR_BIP;
env->msr |= MSR_BIP;
env->pc = cpu->cfg.base_vectors + 0x18;
} else
env->pc = env->btarget;
@ -293,8 +292,8 @@ bool mb_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
CPUMBState *env = &cpu->env;
if ((interrupt_request & CPU_INTERRUPT_HARD)
&& (env->sregs[SR_MSR] & MSR_IE)
&& !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP))
&& (env->msr & MSR_IE)
&& !(env->msr & (MSR_EIP | MSR_BIP))
&& !(env->iflags & (D_FLAG | IMM_FLAG))) {
cs->exception_index = EXCP_IRQ;
mb_cpu_do_interrupt(cs);

22
target/microblaze/op_helper.c
View File

@ -78,14 +78,14 @@ void helper_debug(CPUMBState *env)
qemu_log("PC=%" PRIx64 "\n", env->pc);
qemu_log("rmsr=%" PRIx64 " resr=%" PRIx64 " rear=%" PRIx64 " "
"debug[%x] imm=%x iflags=%x\n",
env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
env->msr, env->sregs[SR_ESR], env->sregs[SR_EAR],
env->debug, env->imm, env->iflags);
qemu_log("btaken=%d btarget=%" PRIx64 " mode=%s(saved=%s) eip=%d ie=%d\n",
env->btaken, env->btarget,
(env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
(env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
(bool)(env->sregs[SR_MSR] & MSR_EIP),
(bool)(env->sregs[SR_MSR] & MSR_IE));
(env->msr & MSR_UM) ? "user" : "kernel",
(env->msr & MSR_UMS) ? "user" : "kernel",
(bool)(env->msr & MSR_EIP),
(bool)(env->msr & MSR_IE));
for (i = 0; i < 32; i++) {
qemu_log("r%2.2d=%8.8x ", i, env->regs[i]);
if ((i + 1) % 4 == 0)
@ -135,15 +135,15 @@ static inline int div_prepare(CPUMBState *env, uint32_t a, uint32_t b)
MicroBlazeCPU *cpu = env_archcpu(env);
if (b == 0) {
env->sregs[SR_MSR] |= MSR_DZ;
env->msr |= MSR_DZ;
if ((env->sregs[SR_MSR] & MSR_EE) && cpu->cfg.div_zero_exception) {
if ((env->msr & MSR_EE) && cpu->cfg.div_zero_exception) {
env->sregs[SR_ESR] = ESR_EC_DIVZERO;
helper_raise_exception(env, EXCP_HW_EXCP);
}
return 0;
}
env->sregs[SR_MSR] &= ~MSR_DZ;
env->msr &= ~MSR_DZ;
return 1;
}
@ -192,7 +192,7 @@ static void update_fpu_flags(CPUMBState *env, int flags)
}
if (raise
&& (env->pvr.regs[2] & PVR2_FPU_EXC_MASK)
&& (env->sregs[SR_MSR] & MSR_EE)) {
&& (env->msr & MSR_EE)) {
raise_fpu_exception(env);
}
}
@ -437,7 +437,7 @@ void helper_memalign(CPUMBState *env, target_ulong addr,
if (mask == 3) {
env->sregs[SR_ESR] |= 1 << 11;
}
if (!(env->sregs[SR_MSR] & MSR_EE)) {
if (!(env->msr & MSR_EE)) {
return;
}
helper_raise_exception(env, EXCP_HW_EXCP);
@ -484,7 +484,7 @@ void mb_cpu_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
env = &cpu->env;
cpu_restore_state(cs, retaddr, true);
if (!(env->sregs[SR_MSR] & MSR_EE)) {
if (!(env->msr & MSR_EE)) {
return;
}

14
target/microblaze/translate.c
View File

@ -1809,16 +1809,16 @@ void mb_cpu_dump_state(CPUState *cs, FILE *f, int flags)
qemu_fprintf(f, "rmsr=%" PRIx64 " resr=%" PRIx64 " rear=%" PRIx64 " "
"debug=%x imm=%x iflags=%x fsr=%" PRIx64 " "
"rbtr=%" PRIx64 "\n",
env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
env->msr, env->sregs[SR_ESR], env->sregs[SR_EAR],
env->debug, env->imm, env->iflags, env->sregs[SR_FSR],
env->sregs[SR_BTR]);
qemu_fprintf(f, "btaken=%d btarget=%" PRIx64 " mode=%s(saved=%s) "
"eip=%d ie=%d\n",
env->btaken, env->btarget,
(env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
(env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
(bool)(env->sregs[SR_MSR] & MSR_EIP),
(bool)(env->sregs[SR_MSR] & MSR_IE));
(env->msr & MSR_UM) ? "user" : "kernel",
(env->msr & MSR_UMS) ? "user" : "kernel",
(bool)(env->msr & MSR_EIP),
(bool)(env->msr & MSR_IE));
for (i = 0; i < 12; i++) {
qemu_fprintf(f, "rpvr%2.2d=%8.8x ", i, env->pvr.regs[i]);
if ((i + 1) % 4 == 0) {
@ -1871,8 +1871,10 @@ void mb_tcg_init(void)
cpu_SR[SR_PC] =
tcg_global_mem_new_i64(cpu_env, offsetof(CPUMBState, pc), "rpc");
cpu_SR[SR_MSR] =
tcg_global_mem_new_i64(cpu_env, offsetof(CPUMBState, msr), "rmsr");
for (i = 1; i < ARRAY_SIZE(cpu_SR); i++) {
for (i = SR_MSR + 1; i < ARRAY_SIZE(cpu_SR); i++) {
cpu_SR[i] = tcg_global_mem_new_i64(cpu_env,
offsetof(CPUMBState, sregs[i]),
special_regnames[i]);