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-rw-r--r--target-alpha/helper.c589
1 files changed, 253 insertions, 336 deletions
diff --git a/target-alpha/helper.c b/target-alpha/helper.c
index 3ba4478c8e..32c2cf9db3 100644
--- a/target-alpha/helper.c
+++ b/target-alpha/helper.c
@@ -160,382 +160,299 @@ void cpu_alpha_store_fpcr (CPUState *env, uint64_t val)
}
#if defined(CONFIG_USER_ONLY)
-
int cpu_alpha_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu)
{
- if (rw == 2)
- env->exception_index = EXCP_ITB_MISS;
- else
- env->exception_index = EXCP_DFAULT;
- env->ipr[IPR_EXC_ADDR] = address;
-
+ env->exception_index = EXCP_MMFAULT;
+ env->trap_arg0 = address;
return 1;
}
-
-void do_interrupt (CPUState *env)
+#else
+void swap_shadow_regs(CPUState *env)
{
- env->exception_index = -1;
+ uint64_t i0, i1, i2, i3, i4, i5, i6, i7;
+
+ i0 = env->ir[8];
+ i1 = env->ir[9];
+ i2 = env->ir[10];
+ i3 = env->ir[11];
+ i4 = env->ir[12];
+ i5 = env->ir[13];
+ i6 = env->ir[14];
+ i7 = env->ir[25];
+
+ env->ir[8] = env->shadow[0];
+ env->ir[9] = env->shadow[1];
+ env->ir[10] = env->shadow[2];
+ env->ir[11] = env->shadow[3];
+ env->ir[12] = env->shadow[4];
+ env->ir[13] = env->shadow[5];
+ env->ir[14] = env->shadow[6];
+ env->ir[25] = env->shadow[7];
+
+ env->shadow[0] = i0;
+ env->shadow[1] = i1;
+ env->shadow[2] = i2;
+ env->shadow[3] = i3;
+ env->shadow[4] = i4;
+ env->shadow[5] = i5;
+ env->shadow[6] = i6;
+ env->shadow[7] = i7;
}
-#else
+/* Returns the OSF/1 entMM failure indication, or -1 on success. */
+static int get_physical_address(CPUState *env, target_ulong addr,
+ int prot_need, int mmu_idx,
+ target_ulong *pphys, int *pprot)
+{
+ target_long saddr = addr;
+ target_ulong phys = 0;
+ target_ulong L1pte, L2pte, L3pte;
+ target_ulong pt, index;
+ int prot = 0;
+ int ret = MM_K_ACV;
+
+ /* Ensure that the virtual address is properly sign-extended from
+ the last implemented virtual address bit. */
+ if (saddr >> TARGET_VIRT_ADDR_SPACE_BITS != saddr >> 63) {
+ goto exit;
+ }
+
+ /* Translate the superpage. */
+ /* ??? When we do more than emulate Unix PALcode, we'll need to
+ determine which KSEG is actually active. */
+ if (saddr < 0 && ((saddr >> 41) & 3) == 2) {
+ /* User-space cannot access KSEG addresses. */
+ if (mmu_idx != MMU_KERNEL_IDX) {
+ goto exit;
+ }
+
+ /* For the benefit of the Typhoon chipset, move bit 40 to bit 43.
+ We would not do this if the 48-bit KSEG is enabled. */
+ phys = saddr & ((1ull << 40) - 1);
+ phys |= (saddr & (1ull << 40)) << 3;
+
+ prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
+ ret = -1;
+ goto exit;
+ }
+
+ /* Interpret the page table exactly like PALcode does. */
-target_phys_addr_t cpu_get_phys_page_debug (CPUState *env, target_ulong addr)
+ pt = env->ptbr;
+
+ /* L1 page table read. */
+ index = (addr >> (TARGET_PAGE_BITS + 20)) & 0x3ff;
+ L1pte = ldq_phys(pt + index*8);
+
+ if (unlikely((L1pte & PTE_VALID) == 0)) {
+ ret = MM_K_TNV;
+ goto exit;
+ }
+ if (unlikely((L1pte & PTE_KRE) == 0)) {
+ goto exit;
+ }
+ pt = L1pte >> 32 << TARGET_PAGE_BITS;
+
+ /* L2 page table read. */
+ index = (addr >> (TARGET_PAGE_BITS + 10)) & 0x3ff;
+ L2pte = ldq_phys(pt + index*8);
+
+ if (unlikely((L2pte & PTE_VALID) == 0)) {
+ ret = MM_K_TNV;
+ goto exit;
+ }
+ if (unlikely((L2pte & PTE_KRE) == 0)) {
+ goto exit;
+ }
+ pt = L2pte >> 32 << TARGET_PAGE_BITS;
+
+ /* L3 page table read. */
+ index = (addr >> TARGET_PAGE_BITS) & 0x3ff;
+ L3pte = ldq_phys(pt + index*8);
+
+ phys = L3pte >> 32 << TARGET_PAGE_BITS;
+ if (unlikely((L3pte & PTE_VALID) == 0)) {
+ ret = MM_K_TNV;
+ goto exit;
+ }
+
+#if PAGE_READ != 1 || PAGE_WRITE != 2 || PAGE_EXEC != 4
+# error page bits out of date
+#endif
+
+ /* Check access violations. */
+ if (L3pte & (PTE_KRE << mmu_idx)) {
+ prot |= PAGE_READ | PAGE_EXEC;
+ }
+ if (L3pte & (PTE_KWE << mmu_idx)) {
+ prot |= PAGE_WRITE;
+ }
+ if (unlikely((prot & prot_need) == 0 && prot_need)) {
+ goto exit;
+ }
+
+ /* Check fault-on-operation violations. */
+ prot &= ~(L3pte >> 1);
+ ret = -1;
+ if (unlikely((prot & prot_need) == 0)) {
+ ret = (prot_need & PAGE_EXEC ? MM_K_FOE :
+ prot_need & PAGE_WRITE ? MM_K_FOW :
+ prot_need & PAGE_READ ? MM_K_FOR : -1);
+ }
+
+ exit:
+ *pphys = phys;
+ *pprot = prot;
+ return ret;
+}
+
+target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
{
- return -1;
+ target_ulong phys;
+ int prot, fail;
+
+ fail = get_physical_address(env, addr, 0, 0, &phys, &prot);
+ return (fail >= 0 ? -1 : phys);
}
-int cpu_alpha_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
- int mmu_idx, int is_softmmu)
+int cpu_alpha_handle_mmu_fault(CPUState *env, target_ulong addr, int rw,
+ int mmu_idx, int is_softmmu)
{
- uint32_t opc;
-
- if (rw == 2) {
- /* Instruction translation buffer miss */
- env->exception_index = EXCP_ITB_MISS;
- } else {
- if (env->ipr[IPR_EXC_ADDR] & 1)
- env->exception_index = EXCP_DTB_MISS_PAL;
- else
- env->exception_index = EXCP_DTB_MISS_NATIVE;
- opc = (ldl_code(env->pc) >> 21) << 4;
- if (rw) {
- opc |= 0x9;
- } else {
- opc |= 0x4;
- }
- env->ipr[IPR_MM_STAT] = opc;
+ target_ulong phys;
+ int prot, fail;
+
+ fail = get_physical_address(env, addr, 1 << rw, mmu_idx, &phys, &prot);
+ if (unlikely(fail >= 0)) {
+ env->exception_index = EXCP_MMFAULT;
+ env->trap_arg0 = addr;
+ env->trap_arg1 = fail;
+ env->trap_arg2 = (rw == 2 ? -1 : rw);
+ return 1;
}
- return 1;
+ tlb_set_page(env, addr & TARGET_PAGE_MASK, phys & TARGET_PAGE_MASK,
+ prot, mmu_idx, TARGET_PAGE_SIZE);
+ return 0;
}
+#endif /* USER_ONLY */
-int cpu_alpha_mfpr (CPUState *env, int iprn, uint64_t *valp)
+void do_interrupt (CPUState *env)
{
- uint64_t hwpcb;
- int ret = 0;
-
- hwpcb = env->ipr[IPR_PCBB];
- switch (iprn) {
- case IPR_ASN:
- if (env->features & FEATURE_ASN)
- *valp = env->ipr[IPR_ASN];
- else
- *valp = 0;
- break;
- case IPR_ASTEN:
- *valp = ((int64_t)(env->ipr[IPR_ASTEN] << 60)) >> 60;
- break;
- case IPR_ASTSR:
- *valp = ((int64_t)(env->ipr[IPR_ASTSR] << 60)) >> 60;
- break;
- case IPR_DATFX:
- /* Write only */
- ret = -1;
- break;
- case IPR_ESP:
- if (env->features & FEATURE_SPS)
- *valp = env->ipr[IPR_ESP];
- else
- *valp = ldq_raw(hwpcb + 8);
- break;
- case IPR_FEN:
- *valp = ((int64_t)(env->ipr[IPR_FEN] << 63)) >> 63;
- break;
- case IPR_IPIR:
- /* Write-only */
- ret = -1;
- break;
- case IPR_IPL:
- *valp = ((int64_t)(env->ipr[IPR_IPL] << 59)) >> 59;
- break;
- case IPR_KSP:
- if (!(env->ipr[IPR_EXC_ADDR] & 1)) {
- ret = -1;
- } else {
- if (env->features & FEATURE_SPS)
- *valp = env->ipr[IPR_KSP];
- else
- *valp = ldq_raw(hwpcb + 0);
- }
- break;
- case IPR_MCES:
- *valp = ((int64_t)(env->ipr[IPR_MCES] << 59)) >> 59;
- break;
- case IPR_PERFMON:
- /* Implementation specific */
- *valp = 0;
- break;
- case IPR_PCBB:
- *valp = ((int64_t)env->ipr[IPR_PCBB] << 16) >> 16;
- break;
- case IPR_PRBR:
- *valp = env->ipr[IPR_PRBR];
- break;
- case IPR_PTBR:
- *valp = env->ipr[IPR_PTBR];
- break;
- case IPR_SCBB:
- *valp = (int64_t)((int32_t)env->ipr[IPR_SCBB]);
- break;
- case IPR_SIRR:
- /* Write-only */
- ret = -1;
- break;
- case IPR_SISR:
- *valp = (int64_t)((int16_t)env->ipr[IPR_SISR]);
- case IPR_SSP:
- if (env->features & FEATURE_SPS)
- *valp = env->ipr[IPR_SSP];
- else
- *valp = ldq_raw(hwpcb + 16);
- break;
- case IPR_SYSPTBR:
- if (env->features & FEATURE_VIRBND)
- *valp = env->ipr[IPR_SYSPTBR];
- else
- ret = -1;
- break;
- case IPR_TBCHK:
- if ((env->features & FEATURE_TBCHK)) {
- /* XXX: TODO */
- *valp = 0;
- ret = -1;
- } else {
- ret = -1;
+ int i = env->exception_index;
+
+ if (qemu_loglevel_mask(CPU_LOG_INT)) {
+ static int count;
+ const char *name = "<unknown>";
+
+ switch (i) {
+ case EXCP_RESET:
+ name = "reset";
+ break;
+ case EXCP_MCHK:
+ name = "mchk";
+ break;
+ case EXCP_SMP_INTERRUPT:
+ name = "smp_interrupt";
+ break;
+ case EXCP_CLK_INTERRUPT:
+ name = "clk_interrupt";
+ break;
+ case EXCP_DEV_INTERRUPT:
+ name = "dev_interrupt";
+ break;
+ case EXCP_MMFAULT:
+ name = "mmfault";
+ break;
+ case EXCP_UNALIGN:
+ name = "unalign";
+ break;
+ case EXCP_OPCDEC:
+ name = "opcdec";
+ break;
+ case EXCP_ARITH:
+ name = "arith";
+ break;
+ case EXCP_FEN:
+ name = "fen";
+ break;
+ case EXCP_CALL_PAL:
+ name = "call_pal";
+ break;
+ case EXCP_STL_C:
+ name = "stl_c";
+ break;
+ case EXCP_STQ_C:
+ name = "stq_c";
+ break;
}
- break;
- case IPR_TBIA:
- /* Write-only */
- ret = -1;
- break;
- case IPR_TBIAP:
- /* Write-only */
- ret = -1;
- break;
- case IPR_TBIS:
- /* Write-only */
- ret = -1;
- break;
- case IPR_TBISD:
- /* Write-only */
- ret = -1;
- break;
- case IPR_TBISI:
- /* Write-only */
- ret = -1;
- break;
- case IPR_USP:
- if (env->features & FEATURE_SPS)
- *valp = env->ipr[IPR_USP];
- else
- *valp = ldq_raw(hwpcb + 24);
- break;
- case IPR_VIRBND:
- if (env->features & FEATURE_VIRBND)
- *valp = env->ipr[IPR_VIRBND];
- else
- ret = -1;
- break;
- case IPR_VPTB:
- *valp = env->ipr[IPR_VPTB];
- break;
- case IPR_WHAMI:
- *valp = env->ipr[IPR_WHAMI];
- break;
- default:
- /* Invalid */
- ret = -1;
- break;
+ qemu_log("INT %6d: %s(%#x) pc=%016" PRIx64 " sp=%016" PRIx64 "\n",
+ ++count, name, env->error_code, env->pc, env->ir[IR_SP]);
}
- return ret;
-}
+ env->exception_index = -1;
-int cpu_alpha_mtpr (CPUState *env, int iprn, uint64_t val, uint64_t *oldvalp)
-{
- uint64_t hwpcb, tmp64;
- uint8_t tmp8;
- int ret = 0;
-
- hwpcb = env->ipr[IPR_PCBB];
- switch (iprn) {
- case IPR_ASN:
- /* Read-only */
- ret = -1;
+#if !defined(CONFIG_USER_ONLY)
+ switch (i) {
+ case EXCP_RESET:
+ i = 0x0000;
break;
- case IPR_ASTEN:
- tmp8 = ((int8_t)(env->ipr[IPR_ASTEN] << 4)) >> 4;
- *oldvalp = tmp8;
- tmp8 &= val & 0xF;
- tmp8 |= (val >> 4) & 0xF;
- env->ipr[IPR_ASTEN] &= ~0xF;
- env->ipr[IPR_ASTEN] |= tmp8;
- ret = 1;
+ case EXCP_MCHK:
+ i = 0x0080;
break;
- case IPR_ASTSR:
- tmp8 = ((int8_t)(env->ipr[IPR_ASTSR] << 4)) >> 4;
- *oldvalp = tmp8;
- tmp8 &= val & 0xF;
- tmp8 |= (val >> 4) & 0xF;
- env->ipr[IPR_ASTSR] &= ~0xF;
- env->ipr[IPR_ASTSR] |= tmp8;
- ret = 1;
- case IPR_DATFX:
- env->ipr[IPR_DATFX] &= ~0x1;
- env->ipr[IPR_DATFX] |= val & 1;
- tmp64 = ldq_raw(hwpcb + 56);
- tmp64 &= ~0x8000000000000000ULL;
- tmp64 |= (val & 1) << 63;
- stq_raw(hwpcb + 56, tmp64);
+ case EXCP_SMP_INTERRUPT:
+ i = 0x0100;
break;
- case IPR_ESP:
- if (env->features & FEATURE_SPS)
- env->ipr[IPR_ESP] = val;
- else
- stq_raw(hwpcb + 8, val);
+ case EXCP_CLK_INTERRUPT:
+ i = 0x0180;
break;
- case IPR_FEN:
- env->ipr[IPR_FEN] = val & 1;
- tmp64 = ldq_raw(hwpcb + 56);
- tmp64 &= ~1;
- tmp64 |= val & 1;
- stq_raw(hwpcb + 56, tmp64);
+ case EXCP_DEV_INTERRUPT:
+ i = 0x0200;
break;
- case IPR_IPIR:
- /* XXX: TODO: Send IRQ to CPU #ir[16] */
+ case EXCP_MMFAULT:
+ i = 0x0280;
break;
- case IPR_IPL:
- *oldvalp = ((int64_t)(env->ipr[IPR_IPL] << 59)) >> 59;
- env->ipr[IPR_IPL] &= ~0x1F;
- env->ipr[IPR_IPL] |= val & 0x1F;
- /* XXX: may issue an interrupt or ASR _now_ */
- ret = 1;
+ case EXCP_UNALIGN:
+ i = 0x0300;
break;
- case IPR_KSP:
- if (!(env->ipr[IPR_EXC_ADDR] & 1)) {
- ret = -1;
- } else {
- if (env->features & FEATURE_SPS)
- env->ipr[IPR_KSP] = val;
- else
- stq_raw(hwpcb + 0, val);
- }
+ case EXCP_OPCDEC:
+ i = 0x0380;
break;
- case IPR_MCES:
- env->ipr[IPR_MCES] &= ~((val & 0x7) | 0x18);
- env->ipr[IPR_MCES] |= val & 0x18;
+ case EXCP_ARITH:
+ i = 0x0400;
break;
- case IPR_PERFMON:
- /* Implementation specific */
- *oldvalp = 0;
- ret = 1;
+ case EXCP_FEN:
+ i = 0x0480;
break;
- case IPR_PCBB:
- /* Read-only */
- ret = -1;
- break;
- case IPR_PRBR:
- env->ipr[IPR_PRBR] = val;
- break;
- case IPR_PTBR:
- /* Read-only */
- ret = -1;
- break;
- case IPR_SCBB:
- env->ipr[IPR_SCBB] = (uint32_t)val;
- break;
- case IPR_SIRR:
- if (val & 0xF) {
- env->ipr[IPR_SISR] |= 1 << (val & 0xF);
- /* XXX: request a software interrupt _now_ */
+ case EXCP_CALL_PAL:
+ i = env->error_code;
+ /* There are 64 entry points for both privileged and unprivileged,
+ with bit 0x80 indicating unprivileged. Each entry point gets
+ 64 bytes to do its job. */
+ if (i & 0x80) {
+ i = 0x2000 + (i - 0x80) * 64;
+ } else {
+ i = 0x1000 + i * 64;
}
break;
- case IPR_SISR:
- /* Read-only */
- ret = -1;
- break;
- case IPR_SSP:
- if (env->features & FEATURE_SPS)
- env->ipr[IPR_SSP] = val;
- else
- stq_raw(hwpcb + 16, val);
- break;
- case IPR_SYSPTBR:
- if (env->features & FEATURE_VIRBND)
- env->ipr[IPR_SYSPTBR] = val;
- else
- ret = -1;
- break;
- case IPR_TBCHK:
- /* Read-only */
- ret = -1;
- break;
- case IPR_TBIA:
- tlb_flush(env, 1);
- break;
- case IPR_TBIAP:
- tlb_flush(env, 1);
- break;
- case IPR_TBIS:
- tlb_flush_page(env, val);
- break;
- case IPR_TBISD:
- tlb_flush_page(env, val);
- break;
- case IPR_TBISI:
- tlb_flush_page(env, val);
- break;
- case IPR_USP:
- if (env->features & FEATURE_SPS)
- env->ipr[IPR_USP] = val;
- else
- stq_raw(hwpcb + 24, val);
- break;
- case IPR_VIRBND:
- if (env->features & FEATURE_VIRBND)
- env->ipr[IPR_VIRBND] = val;
- else
- ret = -1;
- break;
- case IPR_VPTB:
- env->ipr[IPR_VPTB] = val;
- break;
- case IPR_WHAMI:
- /* Read-only */
- ret = -1;
- break;
default:
- /* Invalid */
- ret = -1;
- break;
+ cpu_abort(env, "Unhandled CPU exception");
}
- return ret;
-}
+ /* Remember where the exception happened. Emulate real hardware in
+ that the low bit of the PC indicates PALmode. */
+ env->exc_addr = env->pc | env->pal_mode;
-void do_interrupt (CPUState *env)
-{
- int excp;
+ /* Continue execution at the PALcode entry point. */
+ env->pc = env->palbr + i;
- env->ipr[IPR_EXC_ADDR] = env->pc | 1;
- excp = env->exception_index;
- env->exception_index = -1;
- env->error_code = 0;
- /* XXX: disable interrupts and memory mapping */
- if (env->ipr[IPR_PAL_BASE] != -1ULL) {
- /* We use native PALcode */
- env->pc = env->ipr[IPR_PAL_BASE] + excp;
- } else {
- /* We use emulated PALcode */
- call_pal(env);
- /* Emulate REI */
- env->pc = env->ipr[IPR_EXC_ADDR] & ~7;
- env->ipr[IPR_EXC_ADDR] = env->ipr[IPR_EXC_ADDR] & 1;
- /* XXX: re-enable interrupts and memory mapping */
+ /* Switch to PALmode. */
+ if (!env->pal_mode) {
+ env->pal_mode = 1;
+ swap_shadow_regs(env);
}
+#endif /* !USER_ONLY */
}
-#endif
void cpu_dump_state (CPUState *env, FILE *f, fprintf_function cpu_fprintf,
int flags)
@@ -548,7 +465,7 @@ void cpu_dump_state (CPUState *env, FILE *f, fprintf_function cpu_fprintf,
};
int i;
- cpu_fprintf(f, " PC " TARGET_FMT_lx " PS " TARGET_FMT_lx "\n",
+ cpu_fprintf(f, " PC " TARGET_FMT_lx " PS %02x\n",
env->pc, env->ps);
for (i = 0; i < 31; i++) {
cpu_fprintf(f, "IR%02d %s " TARGET_FMT_lx " ", i,
generated by cgit v1.2.1 (git 2.18.0) at 2024-07-07 19:27:40 +0000