aboutsummaryrefslogtreecommitdiff
path: root/target
diff options
context:
space:
mode:
Diffstat (limited to 'target')
-rw-r--r--target/mips/helper.c123
1 files changed, 74 insertions, 49 deletions
diff --git a/target/mips/helper.c b/target/mips/helper.c
index a2b6459b05..781930a7dd 100644
--- a/target/mips/helper.c
+++ b/target/mips/helper.c
@@ -39,8 +39,8 @@ enum {
#if !defined(CONFIG_USER_ONLY)
/* no MMU emulation */
-int no_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
- target_ulong address, int rw, int access_type)
+int no_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
+ target_ulong address, int rw, int access_type)
{
*physical = address;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
@@ -48,26 +48,28 @@ int no_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
}
/* fixed mapping MMU emulation */
-int fixed_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
- target_ulong address, int rw, int access_type)
+int fixed_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
+ target_ulong address, int rw, int access_type)
{
if (address <= (int32_t)0x7FFFFFFFUL) {
- if (!(env->CP0_Status & (1 << CP0St_ERL)))
+ if (!(env->CP0_Status & (1 << CP0St_ERL))) {
*physical = address + 0x40000000UL;
- else
+ } else {
*physical = address;
- } else if (address <= (int32_t)0xBFFFFFFFUL)
+ }
+ } else if (address <= (int32_t)0xBFFFFFFFUL) {
*physical = address & 0x1FFFFFFF;
- else
+ } else {
*physical = address;
+ }
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return TLBRET_MATCH;
}
/* MIPS32/MIPS64 R4000-style MMU emulation */
-int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
- target_ulong address, int rw, int access_type)
+int r4k_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
+ target_ulong address, int rw, int access_type)
{
uint16_t ASID = env->CP0_EntryHi & env->CP0_EntryHi_ASID_mask;
int i;
@@ -99,8 +101,9 @@ int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
if (rw != MMU_DATA_STORE || (n ? tlb->D1 : tlb->D0)) {
*physical = tlb->PFN[n] | (address & (mask >> 1));
*prot = PAGE_READ;
- if (n ? tlb->D1 : tlb->D0)
+ if (n ? tlb->D1 : tlb->D0) {
*prot |= PAGE_WRITE;
+ }
if (!(n ? tlb->XI1 : tlb->XI0)) {
*prot |= PAGE_EXEC;
}
@@ -130,7 +133,7 @@ static int is_seg_am_mapped(unsigned int am, bool eu, int mmu_idx)
int32_t adetlb_mask;
switch (mmu_idx) {
- case 3 /* ERL */:
+ case 3: /* ERL */
/* If EU is set, always unmapped */
if (eu) {
return 0;
@@ -204,7 +207,7 @@ static int get_segctl_physical_address(CPUMIPSState *env, hwaddr *physical,
pa & ~(hwaddr)segmask);
}
-static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
+static int get_physical_address(CPUMIPSState *env, hwaddr *physical,
int *prot, target_ulong real_address,
int rw, int access_type, int mmu_idx)
{
@@ -252,14 +255,15 @@ static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
} else {
segctl = env->CP0_SegCtl2 >> 16;
}
- ret = get_segctl_physical_address(env, physical, prot, real_address, rw,
- access_type, mmu_idx, segctl,
- 0x3FFFFFFF);
+ ret = get_segctl_physical_address(env, physical, prot,
+ real_address, rw, access_type,
+ mmu_idx, segctl, 0x3FFFFFFF);
#if defined(TARGET_MIPS64)
} else if (address < 0x4000000000000000ULL) {
/* xuseg */
if (UX && address <= (0x3FFFFFFFFFFFFFFFULL & env->SEGMask)) {
- ret = env->tlb->map_address(env, physical, prot, real_address, rw, access_type);
+ ret = env->tlb->map_address(env, physical, prot,
+ real_address, rw, access_type);
} else {
ret = TLBRET_BADADDR;
}
@@ -267,7 +271,8 @@ static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
/* xsseg */
if ((supervisor_mode || kernel_mode) &&
SX && address <= (0x7FFFFFFFFFFFFFFFULL & env->SEGMask)) {
- ret = env->tlb->map_address(env, physical, prot, real_address, rw, access_type);
+ ret = env->tlb->map_address(env, physical, prot,
+ real_address, rw, access_type);
} else {
ret = TLBRET_BADADDR;
}
@@ -307,7 +312,8 @@ static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
/* xkseg */
if (kernel_mode && KX &&
address <= (0xFFFFFFFF7FFFFFFFULL & env->SEGMask)) {
- ret = env->tlb->map_address(env, physical, prot, real_address, rw, access_type);
+ ret = env->tlb->map_address(env, physical, prot,
+ real_address, rw, access_type);
} else {
ret = TLBRET_BADADDR;
}
@@ -328,8 +334,10 @@ static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
access_type, mmu_idx,
env->CP0_SegCtl0 >> 16, 0x1FFFFFFF);
} else {
- /* kseg3 */
- /* XXX: debug segment is not emulated */
+ /*
+ * kseg3
+ * XXX: debug segment is not emulated
+ */
ret = get_segctl_physical_address(env, physical, prot, real_address, rw,
access_type, mmu_idx,
env->CP0_SegCtl0, 0x1FFFFFFF);
@@ -515,9 +523,9 @@ static void raise_mmu_exception(CPUMIPSState *env, target_ulong address,
#if defined(TARGET_MIPS64)
env->CP0_EntryHi &= env->SEGMask;
env->CP0_XContext =
- /* PTEBase */ (env->CP0_XContext & ((~0ULL) << (env->SEGBITS - 7))) |
- /* R */ (extract64(address, 62, 2) << (env->SEGBITS - 9)) |
- /* BadVPN2 */ (extract64(address, 13, env->SEGBITS - 13) << 4);
+ (env->CP0_XContext & ((~0ULL) << (env->SEGBITS - 7))) | /* PTEBase */
+ (extract64(address, 62, 2) << (env->SEGBITS - 9)) | /* R */
+ (extract64(address, 13, env->SEGBITS - 13) << 4); /* BadVPN2 */
#endif
cs->exception_index = exception;
env->error_code = error_code;
@@ -945,7 +953,8 @@ bool mips_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
}
#ifndef CONFIG_USER_ONLY
-hwaddr cpu_mips_translate_address(CPUMIPSState *env, target_ulong address, int rw)
+hwaddr cpu_mips_translate_address(CPUMIPSState *env, target_ulong address,
+ int rw)
{
hwaddr physical;
int prot;
@@ -1005,7 +1014,7 @@ static const char * const excp_names[EXCP_LAST + 1] = {
};
#endif
-target_ulong exception_resume_pc (CPUMIPSState *env)
+target_ulong exception_resume_pc(CPUMIPSState *env)
{
target_ulong bad_pc;
target_ulong isa_mode;
@@ -1013,8 +1022,10 @@ target_ulong exception_resume_pc (CPUMIPSState *env)
isa_mode = !!(env->hflags & MIPS_HFLAG_M16);
bad_pc = env->active_tc.PC | isa_mode;
if (env->hflags & MIPS_HFLAG_BMASK) {
- /* If the exception was raised from a delay slot, come back to
- the jump. */
+ /*
+ * If the exception was raised from a delay slot, come back to
+ * the jump.
+ */
bad_pc -= (env->hflags & MIPS_HFLAG_B16 ? 2 : 4);
}
@@ -1022,14 +1033,14 @@ target_ulong exception_resume_pc (CPUMIPSState *env)
}
#if !defined(CONFIG_USER_ONLY)
-static void set_hflags_for_handler (CPUMIPSState *env)
+static void set_hflags_for_handler(CPUMIPSState *env)
{
/* Exception handlers are entered in 32-bit mode. */
env->hflags &= ~(MIPS_HFLAG_M16);
/* ...except that microMIPS lets you choose. */
if (env->insn_flags & ASE_MICROMIPS) {
- env->hflags |= (!!(env->CP0_Config3
- & (1 << CP0C3_ISA_ON_EXC))
+ env->hflags |= (!!(env->CP0_Config3 &
+ (1 << CP0C3_ISA_ON_EXC))
<< MIPS_HFLAG_M16_SHIFT);
}
}
@@ -1096,10 +1107,12 @@ void mips_cpu_do_interrupt(CPUState *cs)
switch (cs->exception_index) {
case EXCP_DSS:
env->CP0_Debug |= 1 << CP0DB_DSS;
- /* Debug single step cannot be raised inside a delay slot and
- resume will always occur on the next instruction
- (but we assume the pc has always been updated during
- code translation). */
+ /*
+ * Debug single step cannot be raised inside a delay slot and
+ * resume will always occur on the next instruction
+ * (but we assume the pc has always been updated during
+ * code translation).
+ */
env->CP0_DEPC = env->active_tc.PC | !!(env->hflags & MIPS_HFLAG_M16);
goto enter_debug_mode;
case EXCP_DINT:
@@ -1111,7 +1124,8 @@ void mips_cpu_do_interrupt(CPUState *cs)
case EXCP_DBp:
env->CP0_Debug |= 1 << CP0DB_DBp;
/* Setup DExcCode - SDBBP instruction */
- env->CP0_Debug = (env->CP0_Debug & ~(0x1fULL << CP0DB_DEC)) | 9 << CP0DB_DEC;
+ env->CP0_Debug = (env->CP0_Debug & ~(0x1fULL << CP0DB_DEC)) |
+ (9 << CP0DB_DEC);
goto set_DEPC;
case EXCP_DDBS:
env->CP0_Debug |= 1 << CP0DB_DDBS;
@@ -1132,8 +1146,9 @@ void mips_cpu_do_interrupt(CPUState *cs)
env->hflags |= MIPS_HFLAG_DM | MIPS_HFLAG_CP0;
env->hflags &= ~(MIPS_HFLAG_KSU);
/* EJTAG probe trap enable is not implemented... */
- if (!(env->CP0_Status & (1 << CP0St_EXL)))
+ if (!(env->CP0_Status & (1 << CP0St_EXL))) {
env->CP0_Cause &= ~(1U << CP0Ca_BD);
+ }
env->active_tc.PC = env->exception_base + 0x480;
set_hflags_for_handler(env);
break;
@@ -1159,8 +1174,9 @@ void mips_cpu_do_interrupt(CPUState *cs)
}
env->hflags |= MIPS_HFLAG_CP0;
env->hflags &= ~(MIPS_HFLAG_KSU);
- if (!(env->CP0_Status & (1 << CP0St_EXL)))
+ if (!(env->CP0_Status & (1 << CP0St_EXL))) {
env->CP0_Cause &= ~(1U << CP0Ca_BD);
+ }
env->active_tc.PC = env->exception_base;
set_hflags_for_handler(env);
break;
@@ -1176,12 +1192,16 @@ void mips_cpu_do_interrupt(CPUState *cs)
uint32_t pending = (env->CP0_Cause & CP0Ca_IP_mask) >> CP0Ca_IP;
if (env->CP0_Config3 & (1 << CP0C3_VEIC)) {
- /* For VEIC mode, the external interrupt controller feeds
- * the vector through the CP0Cause IP lines. */
+ /*
+ * For VEIC mode, the external interrupt controller feeds
+ * the vector through the CP0Cause IP lines.
+ */
vector = pending;
} else {
- /* Vectored Interrupts
- * Mask with Status.IM7-IM0 to get enabled interrupts. */
+ /*
+ * Vectored Interrupts
+ * Mask with Status.IM7-IM0 to get enabled interrupts.
+ */
pending &= (env->CP0_Status >> CP0St_IM) & 0xff;
/* Find the highest-priority interrupt. */
while (pending >>= 1) {
@@ -1354,7 +1374,8 @@ void mips_cpu_do_interrupt(CPUState *cs)
env->active_tc.PC += offset;
set_hflags_for_handler(env);
- env->CP0_Cause = (env->CP0_Cause & ~(0x1f << CP0Ca_EC)) | (cause << CP0Ca_EC);
+ env->CP0_Cause = (env->CP0_Cause & ~(0x1f << CP0Ca_EC)) |
+ (cause << CP0Ca_EC);
break;
default:
abort();
@@ -1390,7 +1411,7 @@ bool mips_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
}
#if !defined(CONFIG_USER_ONLY)
-void r4k_invalidate_tlb (CPUMIPSState *env, int idx, int use_extra)
+void r4k_invalidate_tlb(CPUMIPSState *env, int idx, int use_extra)
{
CPUState *cs = env_cpu(env);
r4k_tlb_t *tlb;
@@ -1400,16 +1421,20 @@ void r4k_invalidate_tlb (CPUMIPSState *env, int idx, int use_extra)
target_ulong mask;
tlb = &env->tlb->mmu.r4k.tlb[idx];
- /* The qemu TLB is flushed when the ASID changes, so no need to
- flush these entries again. */
+ /*
+ * The qemu TLB is flushed when the ASID changes, so no need to
+ * flush these entries again.
+ */
if (tlb->G == 0 && tlb->ASID != ASID) {
return;
}
if (use_extra && env->tlb->tlb_in_use < MIPS_TLB_MAX) {
- /* For tlbwr, we can shadow the discarded entry into
- a new (fake) TLB entry, as long as the guest can not
- tell that it's there. */
+ /*
+ * For tlbwr, we can shadow the discarded entry into
+ * a new (fake) TLB entry, as long as the guest can not
+ * tell that it's there.
+ */
env->tlb->mmu.r4k.tlb[env->tlb->tlb_in_use] = *tlb;
env->tlb->tlb_in_use++;
return;
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-24 17:04:12 +0000