ppc: Move exception helpers from helper.c to excp_helper.c

Move exception helpers from helper.c to excp_helper.c and
make cpu_dump_rfi() static.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 745 insertions, 0 deletions

diff --git a/target-ppc/excp_helper.c b/target-ppc/excp_helper.c
index c153f4ac92..7fa7a59b4f 100644
--- a/target-ppc/excp_helper.c
+++ b/target-ppc/excp_helper.c
@@ -24,6 +24,751 @@
 //#define DEBUG_OP
 //#define DEBUG_EXCEPTIONS
 
+#ifdef DEBUG_EXCEPTIONS
+#  define LOG_EXCP(...) qemu_log(__VA_ARGS__)
+#else
+#  define LOG_EXCP(...) do { } while (0)
+#endif
+
+/*****************************************************************************/
+/* PowerPC Hypercall emulation */
+
+void (*cpu_ppc_hypercall)(CPUPPCState *);
+
+/*****************************************************************************/
+/* Exception processing */
+#if defined(CONFIG_USER_ONLY)
+void do_interrupt(CPUPPCState *env)
+{
+    env->exception_index = POWERPC_EXCP_NONE;
+    env->error_code = 0;
+}
+
+void ppc_hw_interrupt(CPUPPCState *env)
+{
+    env->exception_index = POWERPC_EXCP_NONE;
+    env->error_code = 0;
+}
+#else /* defined(CONFIG_USER_ONLY) */
+static inline void dump_syscall(CPUPPCState *env)
+{
+    qemu_log_mask(CPU_LOG_INT, "syscall r0=%016" PRIx64 " r3=%016" PRIx64
+                  " r4=%016" PRIx64 " r5=%016" PRIx64 " r6=%016" PRIx64
+                  " nip=" TARGET_FMT_lx "\n",
+                  ppc_dump_gpr(env, 0), ppc_dump_gpr(env, 3),
+                  ppc_dump_gpr(env, 4), ppc_dump_gpr(env, 5),
+                  ppc_dump_gpr(env, 6), env->nip);
+}
+
+/* Note that this function should be greatly optimized
+ * when called with a constant excp, from ppc_hw_interrupt
+ */
+static inline void powerpc_excp(CPUPPCState *env, int excp_model, int excp)
+{
+    target_ulong msr, new_msr, vector;
+    int srr0, srr1, asrr0, asrr1;
+    int lpes0, lpes1, lev;
+
+    if (0) {
+        /* XXX: find a suitable condition to enable the hypervisor mode */
+        lpes0 = (env->spr[SPR_LPCR] >> 1) & 1;
+        lpes1 = (env->spr[SPR_LPCR] >> 2) & 1;
+    } else {
+        /* Those values ensure we won't enter the hypervisor mode */
+        lpes0 = 0;
+        lpes1 = 1;
+    }
+
+    qemu_log_mask(CPU_LOG_INT, "Raise exception at " TARGET_FMT_lx
+                  " => %08x (%02x)\n", env->nip, excp, env->error_code);
+
+    /* new srr1 value excluding must-be-zero bits */
+    msr = env->msr & ~0x783f0000ULL;
+
+    /* new interrupt handler msr */
+    new_msr = env->msr & ((target_ulong)1 << MSR_ME);
+
+    /* target registers */
+    srr0 = SPR_SRR0;
+    srr1 = SPR_SRR1;
+    asrr0 = -1;
+    asrr1 = -1;
+
+    switch (excp) {
+    case POWERPC_EXCP_NONE:
+        /* Should never happen */
+        return;
+    case POWERPC_EXCP_CRITICAL:    /* Critical input                         */
+        switch (excp_model) {
+        case POWERPC_EXCP_40x:
+            srr0 = SPR_40x_SRR2;
+            srr1 = SPR_40x_SRR3;
+            break;
+        case POWERPC_EXCP_BOOKE:
+            srr0 = SPR_BOOKE_CSRR0;
+            srr1 = SPR_BOOKE_CSRR1;
+            break;
+        case POWERPC_EXCP_G2:
+            break;
+        default:
+            goto excp_invalid;
+        }
+        goto store_next;
+    case POWERPC_EXCP_MCHECK:    /* Machine check exception                  */
+        if (msr_me == 0) {
+            /* Machine check exception is not enabled.
+             * Enter checkstop state.
+             */
+            if (qemu_log_enabled()) {
+                qemu_log("Machine check while not allowed. "
+                        "Entering checkstop state\n");
+            } else {
+                fprintf(stderr, "Machine check while not allowed. "
+                        "Entering checkstop state\n");
+            }
+            env->halted = 1;
+            env->interrupt_request |= CPU_INTERRUPT_EXITTB;
+        }
+        if (0) {
+            /* XXX: find a suitable condition to enable the hypervisor mode */
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+
+        /* machine check exceptions don't have ME set */
+        new_msr &= ~((target_ulong)1 << MSR_ME);
+
+        /* XXX: should also have something loaded in DAR / DSISR */
+        switch (excp_model) {
+        case POWERPC_EXCP_40x:
+            srr0 = SPR_40x_SRR2;
+            srr1 = SPR_40x_SRR3;
+            break;
+        case POWERPC_EXCP_BOOKE:
+            srr0 = SPR_BOOKE_MCSRR0;
+            srr1 = SPR_BOOKE_MCSRR1;
+            asrr0 = SPR_BOOKE_CSRR0;
+            asrr1 = SPR_BOOKE_CSRR1;
+            break;
+        default:
+            break;
+        }
+        goto store_next;
+    case POWERPC_EXCP_DSI:       /* Data storage exception                   */
+        LOG_EXCP("DSI exception: DSISR=" TARGET_FMT_lx" DAR=" TARGET_FMT_lx
+                 "\n", env->spr[SPR_DSISR], env->spr[SPR_DAR]);
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_next;
+    case POWERPC_EXCP_ISI:       /* Instruction storage exception            */
+        LOG_EXCP("ISI exception: msr=" TARGET_FMT_lx ", nip=" TARGET_FMT_lx
+                 "\n", msr, env->nip);
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        msr |= env->error_code;
+        goto store_next;
+    case POWERPC_EXCP_EXTERNAL:  /* External input                           */
+        if (lpes0 == 1) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_next;
+    case POWERPC_EXCP_ALIGN:     /* Alignment exception                      */
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        /* XXX: this is false */
+        /* Get rS/rD and rA from faulting opcode */
+        env->spr[SPR_DSISR] |= (ldl_code((env->nip - 4)) & 0x03FF0000) >> 16;
+        goto store_current;
+    case POWERPC_EXCP_PROGRAM:   /* Program exception                        */
+        switch (env->error_code & ~0xF) {
+        case POWERPC_EXCP_FP:
+            if ((msr_fe0 == 0 && msr_fe1 == 0) || msr_fp == 0) {
+                LOG_EXCP("Ignore floating point exception\n");
+                env->exception_index = POWERPC_EXCP_NONE;
+                env->error_code = 0;
+                return;
+            }
+            if (lpes1 == 0) {
+                new_msr |= (target_ulong)MSR_HVB;
+            }
+            msr |= 0x00100000;
+            if (msr_fe0 == msr_fe1) {
+                goto store_next;
+            }
+            msr |= 0x00010000;
+            break;
+        case POWERPC_EXCP_INVAL:
+            LOG_EXCP("Invalid instruction at " TARGET_FMT_lx "\n", env->nip);
+            if (lpes1 == 0) {
+                new_msr |= (target_ulong)MSR_HVB;
+            }
+            msr |= 0x00080000;
+            env->spr[SPR_BOOKE_ESR] = ESR_PIL;
+            break;
+        case POWERPC_EXCP_PRIV:
+            if (lpes1 == 0) {
+                new_msr |= (target_ulong)MSR_HVB;
+            }
+            msr |= 0x00040000;
+            env->spr[SPR_BOOKE_ESR] = ESR_PPR;
+            break;
+        case POWERPC_EXCP_TRAP:
+            if (lpes1 == 0) {
+                new_msr |= (target_ulong)MSR_HVB;
+            }
+            msr |= 0x00020000;
+            env->spr[SPR_BOOKE_ESR] = ESR_PTR;
+            break;
+        default:
+            /* Should never occur */
+            cpu_abort(env, "Invalid program exception %d. Aborting\n",
+                      env->error_code);
+            break;
+        }
+        goto store_current;
+    case POWERPC_EXCP_FPU:       /* Floating-point unavailable exception     */
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_current;
+    case POWERPC_EXCP_SYSCALL:   /* System call exception                    */
+        dump_syscall(env);
+        lev = env->error_code;
+        if ((lev == 1) && cpu_ppc_hypercall) {
+            cpu_ppc_hypercall(env);
+            return;
+        }
+        if (lev == 1 || (lpes0 == 0 && lpes1 == 0)) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_next;
+    case POWERPC_EXCP_APU:       /* Auxiliary processor unavailable          */
+        goto store_current;
+    case POWERPC_EXCP_DECR:      /* Decrementer exception                    */
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_next;
+    case POWERPC_EXCP_FIT:       /* Fixed-interval timer interrupt           */
+        /* FIT on 4xx */
+        LOG_EXCP("FIT exception\n");
+        goto store_next;
+    case POWERPC_EXCP_WDT:       /* Watchdog timer interrupt                 */
+        LOG_EXCP("WDT exception\n");
+        switch (excp_model) {
+        case POWERPC_EXCP_BOOKE:
+            srr0 = SPR_BOOKE_CSRR0;
+            srr1 = SPR_BOOKE_CSRR1;
+            break;
+        default:
+            break;
+        }
+        goto store_next;
+    case POWERPC_EXCP_DTLB:      /* Data TLB error                           */
+        goto store_next;
+    case POWERPC_EXCP_ITLB:      /* Instruction TLB error                    */
+        goto store_next;
+    case POWERPC_EXCP_DEBUG:     /* Debug interrupt                          */
+        switch (excp_model) {
+        case POWERPC_EXCP_BOOKE:
+            srr0 = SPR_BOOKE_DSRR0;
+            srr1 = SPR_BOOKE_DSRR1;
+            asrr0 = SPR_BOOKE_CSRR0;
+            asrr1 = SPR_BOOKE_CSRR1;
+            break;
+        default:
+            break;
+        }
+        /* XXX: TODO */
+        cpu_abort(env, "Debug exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_SPEU:      /* SPE/embedded floating-point unavailable  */
+        env->spr[SPR_BOOKE_ESR] = ESR_SPV;
+        goto store_current;
+    case POWERPC_EXCP_EFPDI:     /* Embedded floating-point data interrupt   */
+        /* XXX: TODO */
+        cpu_abort(env, "Embedded floating point data exception "
+                  "is not implemented yet !\n");
+        env->spr[SPR_BOOKE_ESR] = ESR_SPV;
+        goto store_next;
+    case POWERPC_EXCP_EFPRI:     /* Embedded floating-point round interrupt  */
+        /* XXX: TODO */
+        cpu_abort(env, "Embedded floating point round exception "
+                  "is not implemented yet !\n");
+        env->spr[SPR_BOOKE_ESR] = ESR_SPV;
+        goto store_next;
+    case POWERPC_EXCP_EPERFM:    /* Embedded performance monitor interrupt   */
+        /* XXX: TODO */
+        cpu_abort(env,
+                  "Performance counter exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_DOORI:     /* Embedded doorbell interrupt              */
+        goto store_next;
+    case POWERPC_EXCP_DOORCI:    /* Embedded doorbell critical interrupt     */
+        srr0 = SPR_BOOKE_CSRR0;
+        srr1 = SPR_BOOKE_CSRR1;
+        goto store_next;
+    case POWERPC_EXCP_RESET:     /* System reset exception                   */
+        if (msr_pow) {
+            /* indicate that we resumed from power save mode */
+            msr |= 0x10000;
+        } else {
+            new_msr &= ~((target_ulong)1 << MSR_ME);
+        }
+
+        if (0) {
+            /* XXX: find a suitable condition to enable the hypervisor mode */
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_next;
+    case POWERPC_EXCP_DSEG:      /* Data segment exception                   */
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_next;
+    case POWERPC_EXCP_ISEG:      /* Instruction segment exception            */
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_next;
+    case POWERPC_EXCP_HDECR:     /* Hypervisor decrementer exception         */
+        srr0 = SPR_HSRR0;
+        srr1 = SPR_HSRR1;
+        new_msr |= (target_ulong)MSR_HVB;
+        new_msr |= env->msr & ((target_ulong)1 << MSR_RI);
+        goto store_next;
+    case POWERPC_EXCP_TRACE:     /* Trace exception                          */
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_next;
+    case POWERPC_EXCP_HDSI:      /* Hypervisor data storage exception        */
+        srr0 = SPR_HSRR0;
+        srr1 = SPR_HSRR1;
+        new_msr |= (target_ulong)MSR_HVB;
+        new_msr |= env->msr & ((target_ulong)1 << MSR_RI);
+        goto store_next;
+    case POWERPC_EXCP_HISI:      /* Hypervisor instruction storage exception */
+        srr0 = SPR_HSRR0;
+        srr1 = SPR_HSRR1;
+        new_msr |= (target_ulong)MSR_HVB;
+        new_msr |= env->msr & ((target_ulong)1 << MSR_RI);
+        goto store_next;
+    case POWERPC_EXCP_HDSEG:     /* Hypervisor data segment exception        */
+        srr0 = SPR_HSRR0;
+        srr1 = SPR_HSRR1;
+        new_msr |= (target_ulong)MSR_HVB;
+        new_msr |= env->msr & ((target_ulong)1 << MSR_RI);
+        goto store_next;
+    case POWERPC_EXCP_HISEG:     /* Hypervisor instruction segment exception */
+        srr0 = SPR_HSRR0;
+        srr1 = SPR_HSRR1;
+        new_msr |= (target_ulong)MSR_HVB;
+        new_msr |= env->msr & ((target_ulong)1 << MSR_RI);
+        goto store_next;
+    case POWERPC_EXCP_VPU:       /* Vector unavailable exception             */
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        goto store_current;
+    case POWERPC_EXCP_PIT:       /* Programmable interval timer interrupt    */
+        LOG_EXCP("PIT exception\n");
+        goto store_next;
+    case POWERPC_EXCP_IO:        /* IO error exception                       */
+        /* XXX: TODO */
+        cpu_abort(env, "601 IO error exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_RUNM:      /* Run mode exception                       */
+        /* XXX: TODO */
+        cpu_abort(env, "601 run mode exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_EMUL:      /* Emulation trap exception                 */
+        /* XXX: TODO */
+        cpu_abort(env, "602 emulation trap exception "
+                  "is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_IFTLB:     /* Instruction fetch TLB error              */
+        if (lpes1 == 0) { /* XXX: check this */
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        switch (excp_model) {
+        case POWERPC_EXCP_602:
+        case POWERPC_EXCP_603:
+        case POWERPC_EXCP_603E:
+        case POWERPC_EXCP_G2:
+            goto tlb_miss_tgpr;
+        case POWERPC_EXCP_7x5:
+            goto tlb_miss;
+        case POWERPC_EXCP_74xx:
+            goto tlb_miss_74xx;
+        default:
+            cpu_abort(env, "Invalid instruction TLB miss exception\n");
+            break;
+        }
+        break;
+    case POWERPC_EXCP_DLTLB:     /* Data load TLB miss                       */
+        if (lpes1 == 0) { /* XXX: check this */
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        switch (excp_model) {
+        case POWERPC_EXCP_602:
+        case POWERPC_EXCP_603:
+        case POWERPC_EXCP_603E:
+        case POWERPC_EXCP_G2:
+            goto tlb_miss_tgpr;
+        case POWERPC_EXCP_7x5:
+            goto tlb_miss;
+        case POWERPC_EXCP_74xx:
+            goto tlb_miss_74xx;
+        default:
+            cpu_abort(env, "Invalid data load TLB miss exception\n");
+            break;
+        }
+        break;
+    case POWERPC_EXCP_DSTLB:     /* Data store TLB miss                      */
+        if (lpes1 == 0) { /* XXX: check this */
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        switch (excp_model) {
+        case POWERPC_EXCP_602:
+        case POWERPC_EXCP_603:
+        case POWERPC_EXCP_603E:
+        case POWERPC_EXCP_G2:
+        tlb_miss_tgpr:
+            /* Swap temporary saved registers with GPRs */
+            if (!(new_msr & ((target_ulong)1 << MSR_TGPR))) {
+                new_msr |= (target_ulong)1 << MSR_TGPR;
+                hreg_swap_gpr_tgpr(env);
+            }
+            goto tlb_miss;
+        case POWERPC_EXCP_7x5:
+        tlb_miss:
+#if defined(DEBUG_SOFTWARE_TLB)
+            if (qemu_log_enabled()) {
+                const char *es;
+                target_ulong *miss, *cmp;
+                int en;
+
+                if (excp == POWERPC_EXCP_IFTLB) {
+                    es = "I";
+                    en = 'I';
+                    miss = &env->spr[SPR_IMISS];
+                    cmp = &env->spr[SPR_ICMP];
+                } else {
+                    if (excp == POWERPC_EXCP_DLTLB) {
+                        es = "DL";
+                    } else {
+                        es = "DS";
+                    }
+                    en = 'D';
+                    miss = &env->spr[SPR_DMISS];
+                    cmp = &env->spr[SPR_DCMP];
+                }
+                qemu_log("6xx %sTLB miss: %cM " TARGET_FMT_lx " %cC "
+                         TARGET_FMT_lx " H1 " TARGET_FMT_lx " H2 "
+                         TARGET_FMT_lx " %08x\n", es, en, *miss, en, *cmp,
+                         env->spr[SPR_HASH1], env->spr[SPR_HASH2],
+                         env->error_code);
+            }
+#endif
+            msr |= env->crf[0] << 28;
+            msr |= env->error_code; /* key, D/I, S/L bits */
+            /* Set way using a LRU mechanism */
+            msr |= ((env->last_way + 1) & (env->nb_ways - 1)) << 17;
+            break;
+        case POWERPC_EXCP_74xx:
+        tlb_miss_74xx:
+#if defined(DEBUG_SOFTWARE_TLB)
+            if (qemu_log_enabled()) {
+                const char *es;
+                target_ulong *miss, *cmp;
+                int en;
+
+                if (excp == POWERPC_EXCP_IFTLB) {
+                    es = "I";
+                    en = 'I';
+                    miss = &env->spr[SPR_TLBMISS];
+                    cmp = &env->spr[SPR_PTEHI];
+                } else {
+                    if (excp == POWERPC_EXCP_DLTLB) {
+                        es = "DL";
+                    } else {
+                        es = "DS";
+                    }
+                    en = 'D';
+                    miss = &env->spr[SPR_TLBMISS];
+                    cmp = &env->spr[SPR_PTEHI];
+                }
+                qemu_log("74xx %sTLB miss: %cM " TARGET_FMT_lx " %cC "
+                         TARGET_FMT_lx " %08x\n", es, en, *miss, en, *cmp,
+                         env->error_code);
+            }
+#endif
+            msr |= env->error_code; /* key bit */
+            break;
+        default:
+            cpu_abort(env, "Invalid data store TLB miss exception\n");
+            break;
+        }
+        goto store_next;
+    case POWERPC_EXCP_FPA:       /* Floating-point assist exception          */
+        /* XXX: TODO */
+        cpu_abort(env, "Floating point assist exception "
+                  "is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_DABR:      /* Data address breakpoint                  */
+        /* XXX: TODO */
+        cpu_abort(env, "DABR exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_IABR:      /* Instruction address breakpoint           */
+        /* XXX: TODO */
+        cpu_abort(env, "IABR exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_SMI:       /* System management interrupt              */
+        /* XXX: TODO */
+        cpu_abort(env, "SMI exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_THERM:     /* Thermal interrupt                        */
+        /* XXX: TODO */
+        cpu_abort(env, "Thermal management exception "
+                  "is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_PERFM:     /* Embedded performance monitor interrupt   */
+        if (lpes1 == 0) {
+            new_msr |= (target_ulong)MSR_HVB;
+        }
+        /* XXX: TODO */
+        cpu_abort(env,
+                  "Performance counter exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_VPUA:      /* Vector assist exception                  */
+        /* XXX: TODO */
+        cpu_abort(env, "VPU assist exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_SOFTP:     /* Soft patch exception                     */
+        /* XXX: TODO */
+        cpu_abort(env,
+                  "970 soft-patch exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_MAINT:     /* Maintenance exception                    */
+        /* XXX: TODO */
+        cpu_abort(env,
+                  "970 maintenance exception is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_MEXTBR:    /* Maskable external breakpoint             */
+        /* XXX: TODO */
+        cpu_abort(env, "Maskable external exception "
+                  "is not implemented yet !\n");
+        goto store_next;
+    case POWERPC_EXCP_NMEXTBR:   /* Non maskable external breakpoint         */
+        /* XXX: TODO */
+        cpu_abort(env, "Non maskable external exception "
+                  "is not implemented yet !\n");
+        goto store_next;
+    default:
+    excp_invalid:
+        cpu_abort(env, "Invalid PowerPC exception %d. Aborting\n", excp);
+        break;
+    store_current:
+        /* save current instruction location */
+        env->spr[srr0] = env->nip - 4;
+        break;
+    store_next:
+        /* save next instruction location */
+        env->spr[srr0] = env->nip;
+        break;
+    }
+    /* Save MSR */
+    env->spr[srr1] = msr;
+    /* If any alternate SRR register are defined, duplicate saved values */
+    if (asrr0 != -1) {
+        env->spr[asrr0] = env->spr[srr0];
+    }
+    if (asrr1 != -1) {
+        env->spr[asrr1] = env->spr[srr1];
+    }
+    /* If we disactivated any translation, flush TLBs */
+    if (msr & ((1 << MSR_IR) | (1 << MSR_DR))) {
+        tlb_flush(env, 1);
+    }
+
+    if (msr_ile) {
+        new_msr |= (target_ulong)1 << MSR_LE;
+    }
+
+    /* Jump to handler */
+    vector = env->excp_vectors[excp];
+    if (vector == (target_ulong)-1ULL) {
+        cpu_abort(env, "Raised an exception without defined vector %d\n",
+                  excp);
+    }
+    vector |= env->excp_prefix;
+#if defined(TARGET_PPC64)
+    if (excp_model == POWERPC_EXCP_BOOKE) {
+        if (!msr_icm) {
+            vector = (uint32_t)vector;
+        } else {
+            new_msr |= (target_ulong)1 << MSR_CM;
+        }
+    } else {
+        if (!msr_isf && !(env->mmu_model & POWERPC_MMU_64)) {
+            vector = (uint32_t)vector;
+        } else {
+            new_msr |= (target_ulong)1 << MSR_SF;
+        }
+    }
+#endif
+    /* XXX: we don't use hreg_store_msr here as already have treated
+     *      any special case that could occur. Just store MSR and update hflags
+     */
+    env->msr = new_msr & env->msr_mask;
+    hreg_compute_hflags(env);
+    env->nip = vector;
+    /* Reset exception state */
+    env->exception_index = POWERPC_EXCP_NONE;
+    env->error_code = 0;
+
+    if ((env->mmu_model == POWERPC_MMU_BOOKE) ||
+        (env->mmu_model == POWERPC_MMU_BOOKE206)) {
+        /* XXX: The BookE changes address space when switching modes,
+                we should probably implement that as different MMU indexes,
+                but for the moment we do it the slow way and flush all.  */
+        tlb_flush(env, 1);
+    }
+}
+
+void do_interrupt(CPUPPCState *env)
+{
+    powerpc_excp(env, env->excp_model, env->exception_index);
+}
+
+void ppc_hw_interrupt(CPUPPCState *env)
+{
+    int hdice;
+
+#if 0
+    qemu_log_mask(CPU_LOG_INT, "%s: %p pending %08x req %08x me %d ee %d\n",
+                __func__, env, env->pending_interrupts,
+                env->interrupt_request, (int)msr_me, (int)msr_ee);
+#endif
+    /* External reset */
+    if (env->pending_interrupts & (1 << PPC_INTERRUPT_RESET)) {
+        env->pending_interrupts &= ~(1 << PPC_INTERRUPT_RESET);
+        powerpc_excp(env, env->excp_model, POWERPC_EXCP_RESET);
+        return;
+    }
+    /* Machine check exception */
+    if (env->pending_interrupts & (1 << PPC_INTERRUPT_MCK)) {
+        env->pending_interrupts &= ~(1 << PPC_INTERRUPT_MCK);
+        powerpc_excp(env, env->excp_model, POWERPC_EXCP_MCHECK);
+        return;
+    }
+#if 0 /* TODO */
+    /* External debug exception */
+    if (env->pending_interrupts & (1 << PPC_INTERRUPT_DEBUG)) {
+        env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DEBUG);
+        powerpc_excp(env, env->excp_model, POWERPC_EXCP_DEBUG);
+        return;
+    }
+#endif
+    if (0) {
+        /* XXX: find a suitable condition to enable the hypervisor mode */
+        hdice = env->spr[SPR_LPCR] & 1;
+    } else {
+        hdice = 0;
+    }
+    if ((msr_ee != 0 || msr_hv == 0 || msr_pr != 0) && hdice != 0) {
+        /* Hypervisor decrementer exception */
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_HDECR)) {
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_HDECR);
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_HDECR);
+            return;
+        }
+    }
+    if (msr_ce != 0) {
+        /* External critical interrupt */
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_CEXT)) {
+            /* Taking a critical external interrupt does not clear the external
+             * critical interrupt status
+             */
+#if 0
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_CEXT);
+#endif
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_CRITICAL);
+            return;
+        }
+    }
+    if (msr_ee != 0) {
+        /* Watchdog timer on embedded PowerPC */
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_WDT)) {
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_WDT);
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_WDT);
+            return;
+        }
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_CDOORBELL)) {
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_CDOORBELL);
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_DOORCI);
+            return;
+        }
+        /* Fixed interval timer on embedded PowerPC */
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_FIT)) {
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_FIT);
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_FIT);
+            return;
+        }
+        /* Programmable interval timer on embedded PowerPC */
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_PIT)) {
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_PIT);
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_PIT);
+            return;
+        }
+        /* Decrementer exception */
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_DECR)) {
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DECR);
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_DECR);
+            return;
+        }
+        /* External interrupt */
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_EXT)) {
+            /* Taking an external interrupt does not clear the external
+             * interrupt status
+             */
+#if 0
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_EXT);
+#endif
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_EXTERNAL);
+            return;
+        }
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_DOORBELL)) {
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DOORBELL);
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_DOORI);
+            return;
+        }
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_PERFM)) {
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_PERFM);
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_PERFM);
+            return;
+        }
+        /* Thermal interrupt */
+        if (env->pending_interrupts & (1 << PPC_INTERRUPT_THERM)) {
+            env->pending_interrupts &= ~(1 << PPC_INTERRUPT_THERM);
+            powerpc_excp(env, env->excp_model, POWERPC_EXCP_THERM);
+            return;
+        }
+    }
+}
+#endif /* !CONFIG_USER_ONLY */
+
+#if defined(DEBUG_OP)
+static void cpu_dump_rfi(target_ulong RA, target_ulong msr)
+{
+    qemu_log("Return from exception at " TARGET_FMT_lx " with flags "
+             TARGET_FMT_lx "\n", RA, msr);
+}
+#endif
+
 /*****************************************************************************/
 /* Exceptions processing helpers */