PowerPC system emulation fixes (Jocelyn Mayer)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@722 c046a42c-6fe2-441c-8c8c-71466251a162

7 files changed, 271 insertions, 1187 deletions

diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 3809f20..6cd0895 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -20,9 +20,6 @@
 #if !defined (__CPU_PPC_H__)
 #define __CPU_PPC_H__
 
-#include <endian.h>
-#include <asm/byteorder.h>
-
 #define TARGET_LONG_BITS 32
 
 #include "cpu-defs.h"
@@ -157,14 +154,26 @@ typedef struct CPUPPCState {
     int error_code;
     int access_type; /* when a memory exception occurs, the access
                         type is stored here */
+#if 0 /* TODO */
+    uint32_t pending_exceptions; /* For external & decr exception,
+				  * that can be delayed */
+#else
     uint32_t exceptions; /* exception queue */
-    uint32_t errors[16];
+    uint32_t errors[32];
+#endif
     int user_mode_only; /* user mode only simulation */
     struct TranslationBlock *current_tb; /* currently executing TB */
     /* soft mmu support */
-    /* 0 = kernel, 1 = user */
+    /* 0 = kernel, 1 = user (may have 2 = kernel code, 3 = user code ?) */
     CPUTLBEntry tlb_read[2][CPU_TLB_SIZE];
     CPUTLBEntry tlb_write[2][CPU_TLB_SIZE];
+
+    /* ice debug support */
+    uint32_t breakpoints[MAX_BREAKPOINTS];
+    int nb_breakpoints;
+    int brkstate;
+    int singlestep_enabled;
+
     /* user data */
     void *opaque;
 } CPUPPCState;
@@ -179,14 +188,21 @@ struct siginfo;
 int cpu_ppc_signal_handler(int host_signum, struct siginfo *info, 
                            void *puc);
 
-void cpu_ppc_dump_state(CPUPPCState *env, FILE *f, int flags);
+void do_interrupt (CPUPPCState *env);
 void cpu_loop_exit(void);
+
+void cpu_ppc_dump_state(CPUPPCState *env, FILE *f, int flags);
 void dump_stack (CPUPPCState *env);
-uint32_t _load_xer (void);
-void _store_xer (uint32_t value);
-uint32_t _load_msr (void);
-void _store_msr (uint32_t value);
-void do_interrupt (CPUPPCState *env);
+
+uint32_t _load_xer (CPUPPCState *env);
+void _store_xer (CPUPPCState *env, uint32_t value);
+uint32_t _load_msr (CPUPPCState *env);
+void _store_msr (CPUPPCState *env, uint32_t value);
+
+void PPC_init_hw (uint32_t mem_size,
+                  uint32_t kernel_addr, uint32_t kernel_size,
+                  uint32_t stack_addr, int boot_device,
+		  const unsigned char *initrd_file);
 
 #define TARGET_PAGE_BITS 12
 #include "cpu-all.h"
@@ -277,14 +293,6 @@ void do_interrupt (CPUPPCState *env);
 #define TARGET_PAGE_BITS 12
 #include "cpu-all.h"
 
-CPUPPCState *cpu_ppc_init(void);
-int cpu_ppc_exec(CPUPPCState *s);
-void cpu_ppc_close(CPUPPCState *s);
-void cpu_ppc_dump_state(CPUPPCState *env, FILE *f, int flags);
-void PPC_init_hw (CPUPPCState *env, uint32_t mem_size,
-                  uint32_t kernel_addr, uint32_t kernel_size,
-                  uint32_t stack_addr, int boot_device);
-
 /* Memory access type :
  * may be needed for precise access rights control and precise exceptions.
  */
@@ -351,12 +359,14 @@ enum {
     /* flags for EXCP_DSI */
     EXCP_DSI_DIRECT    = 0x10,
     EXCP_DSI_STORE     = 0x20,
-    EXCP_ECXW          = 0x40,
+    EXCP_DSI_ECXW      = 0x40,
     /* Exception subtypes for EXCP_ISI                              */
     EXCP_ISI_TRANSLATE = 0x01,  /* Code address can't be translated */
     EXCP_ISI_NOEXEC    = 0x02,  /* Try to fetch from a data segment */
     EXCP_ISI_GUARD     = 0x03,  /* Fetch from guarded memory        */
     EXCP_ISI_PROT      = 0x04,  /* Memory protection violation      */
+    EXCP_ISI_DIRECT    = 0x05,  /* Trying to fetch from             *
+				 * a direct store segment           */
     /* Exception subtypes for EXCP_ALIGN                            */
     EXCP_ALIGN_FP      = 0x01,  /* FP alignment exception           */
     EXCP_ALIGN_LST     = 0x02,  /* Unaligned mult/extern load/store */
diff --git a/target-ppc/exec.h b/target-ppc/exec.h
index 8a255ec..72bd03e 100644
--- a/target-ppc/exec.h
+++ b/target-ppc/exec.h
@@ -36,7 +36,11 @@ register uint32_t T2 asm(AREG3);
 #define FTS1 ((float)env->ft1)
 #define FTS2 ((float)env->ft2)
 
+#if defined (DEBUG_OP)
+#define RETURN() __asm__ __volatile__("nop");
+#else
 #define RETURN() __asm__ __volatile__("");
+#endif
 
 #include "cpu.h"
 #include "exec-all.h"
@@ -149,6 +153,7 @@ void do_icbi (void);
 void do_tlbia (void);
 void do_tlbie (void);
 
+void dump_state (void);
 void dump_rfi (void);
 void dump_store_sr (int srnum);
 void dump_store_ibat (int ul, int nr);
diff --git a/target-ppc/helper.c b/target-ppc/helper.c
index 4e8206e..e4bc054 100644
--- a/target-ppc/helper.c
+++ b/target-ppc/helper.c
@@ -21,6 +21,7 @@
 
 #include "exec.h"
 #if defined (USE_OPEN_FIRMWARE)
+#include <time.h>
 #include "of.h"
 #endif
 
@@ -28,7 +29,7 @@
 //#define DEBUG_BATS
 //#define DEBUG_EXCEPTIONS
 
-extern FILE *logfile, *stderr;
+extern FILE *logfile, *stdout, *stderr;
 void exit (int);
 void abort (void);
 
@@ -74,6 +75,9 @@ int check_exception_state (CPUState *env)
 
 /*****************************************************************************/
 /* PPC MMU emulation */
+int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
+                              int is_user, int is_softmmu);
+
 /* Perform BAT hit & translation */
 static int get_bat (CPUState *env, uint32_t *real, int *prot,
                     uint32_t virtual, int rw, int type)
@@ -88,8 +92,6 @@ static int get_bat (CPUState *env, uint32_t *real, int *prot,
         fprintf(logfile, "%s: %cBAT v 0x%08x\n", __func__,
                type == ACCESS_CODE ? 'I' : 'D', virtual);
     }
-    printf("%s: %cBAT v 0x%08x\n", __func__,
-           type == ACCESS_CODE ? 'I' : 'D', virtual);
 #endif
     switch (type) {
     case ACCESS_CODE:
@@ -106,8 +108,6 @@ static int get_bat (CPUState *env, uint32_t *real, int *prot,
         fprintf(logfile, "%s...: %cBAT v 0x%08x\n", __func__,
                type == ACCESS_CODE ? 'I' : 'D', virtual);
     }
-    printf("%s...: %cBAT v 0x%08x\n", __func__,
-           type == ACCESS_CODE ? 'I' : 'D', virtual);
 #endif
     base = virtual & 0xFFFC0000;
     for (i = 0; i < 4; i++) {
@@ -121,10 +121,6 @@ static int get_bat (CPUState *env, uint32_t *real, int *prot,
             fprintf(logfile, "%s: %cBAT%d v 0x%08x BATu 0x%08x BATl 0x%08x\n",
                     __func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual,
                     *BATu, *BATl);
-        } else {
-            printf("%s: %cBAT%d v 0x%08x BATu 0x%08x BATl 0x%08x\n",
-                   __func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual,
-                   *BATu, *BATl);
         }
 #endif
         if ((virtual & 0xF0000000) == BEPIu &&
@@ -135,7 +131,7 @@ static int get_bat (CPUState *env, uint32_t *real, int *prot,
                 /* Get physical address */
                 *real = (*BATl & 0xF0000000) |
                     ((virtual & 0x0FFE0000 & bl) | (*BATl & 0x0FFE0000)) |
-                    (virtual & 0x0001FFFF);
+                    (virtual & 0x0001F000);
                 if (*BATl & 0x00000001)
                     *prot = PROT_READ;
                 if (*BATl & 0x00000002)
@@ -145,10 +141,6 @@ static int get_bat (CPUState *env, uint32_t *real, int *prot,
                     fprintf(logfile, "BAT %d match: r 0x%08x prot=%c%c\n",
                             i, *real, *prot & PROT_READ ? 'R' : '-',
                             *prot & PROT_WRITE ? 'W' : '-');
-                } else {
-                    printf("BAT %d match: 0x%08x => 0x%08x prot=%c%c\n",
-                           i, virtual, *real, *prot & PROT_READ ? 'R' : '-',
-                           *prot & PROT_WRITE ? 'W' : '-');
                 }
 #endif
                 ret = 0;
@@ -181,7 +173,7 @@ static int get_bat (CPUState *env, uint32_t *real, int *prot,
 static int find_pte (uint32_t *RPN, int *prot, uint32_t base, uint32_t va,
                      int h, int key, int rw)
 {
-    uint32_t pte0, pte1, keep = 0;
+    uint32_t pte0, pte1, keep = 0, access = 0;
     int i, good = -1, store = 0;
     int ret = -1; /* No entry found */
 
@@ -189,85 +181,97 @@ static int find_pte (uint32_t *RPN, int *prot, uint32_t base, uint32_t va,
         pte0 = ldl_raw((void *)((uint32_t)phys_ram_base + base + (i * 8)));
         pte1 =  ldl_raw((void *)((uint32_t)phys_ram_base + base + (i * 8) + 4));
 #if defined (DEBUG_MMU)
-        printf("Load pte from 0x%08x => 0x%08x 0x%08x\n", base + (i * 8),
-               pte0, pte1);
+	if (loglevel > 0) {
+	    fprintf(logfile, "Load pte from 0x%08x => 0x%08x 0x%08x "
+		    "%d %d %d 0x%08x\n", base + (i * 8), pte0, pte1,
+		    pte0 >> 31, h, (pte0 >> 6) & 1, va);
+	}
 #endif
         /* Check validity and table match */
         if (pte0 & 0x80000000 && (h == ((pte0 >> 6) & 1))) {
-#if defined (DEBUG_MMU)
-            printf("PTE is valid and table matches... compare 0x%08x:%08x\n",
-                   pte0 & 0x7FFFFFBF, va);
-#endif
             /* Check vsid & api */
             if ((pte0 & 0x7FFFFFBF) == va) {
-#if defined (DEBUG_MMU)
-                printf("PTE match !\n");
-#endif
                 if (good == -1) {
                     good = i;
                     keep = pte1;
                 } else {
                     /* All matches should have equal RPN, WIMG & PP */
                     if ((keep & 0xFFFFF07B) != (pte1 & 0xFFFFF07B)) {
-                        printf("Bad RPN/WIMG/PP\n");
+			if (loglevel > 0)
+			    fprintf(logfile, "Bad RPN/WIMG/PP\n");
                         return -1;
                     }
                 }
                 /* Check access rights */
                 if (key == 0) {
-                    *prot = PROT_READ;
+                    access = PROT_READ;
                     if ((pte1 & 0x00000003) != 0x3)
-                        *prot |= PROT_WRITE;
+                        access |= PROT_WRITE;
                 } else {
                     switch (pte1 & 0x00000003) {
                     case 0x0:
-                        *prot = 0;
+                        access = 0;
                         break;
                     case 0x1:
                     case 0x3:
-                        *prot = PROT_READ;
+                        access = PROT_READ;
                         break;
                     case 0x2:
-                        *prot = PROT_READ | PROT_WRITE;
+                        access = PROT_READ | PROT_WRITE;
                         break;
                     }
                 }
-                if ((rw == 0 && *prot != 0) ||
-                    (rw == 1 && (*prot & PROT_WRITE))) {
+                if (ret < 0) {
+		    if ((rw == 0 && (access & PROT_READ)) ||
+			(rw == 1 && (access & PROT_WRITE))) {
 #if defined (DEBUG_MMU)
-                    printf("PTE access granted !\n");
+			if (loglevel > 0)
+			    fprintf(logfile, "PTE access granted !\n");
 #endif
                     good = i;
                     keep = pte1;
                     ret = 0;
-                } else if (ret == -1) {
-                    ret = -2; /* Access right violation */
+		    } else {
+			/* Access right violation */
+			ret = -2;
 #if defined (DEBUG_MMU)
-                    printf("PTE access rejected\n");
+			if (loglevel > 0)
+			    fprintf(logfile, "PTE access rejected\n");
 #endif
                 }
+		    *prot = access;
+		}
             }
         }
     }
     if (good != -1) {
         *RPN = keep & 0xFFFFF000;
 #if defined (DEBUG_MMU)
-        printf("found PTE at addr 0x%08x prot=0x%01x ret=%d\n",
+	if (loglevel > 0) {
+	    fprintf(logfile, "found PTE at addr 0x%08x prot=0x%01x ret=%d\n",
                *RPN, *prot, ret);
+	}
 #endif
         /* Update page flags */
         if (!(keep & 0x00000100)) {
+	    /* Access flag */
             keep |= 0x00000100;
             store = 1;
         }
-        if (rw) {
             if (!(keep & 0x00000080)) {
+	    if (rw && ret == 0) {
+		/* Change flag */
                 keep |= 0x00000080;
                 store = 1;
+	    } else {
+		/* Force page fault for first write access */
+		*prot &= ~PROT_WRITE;
             }
         }
-        if (store)
-            stl_raw((void *)(base + (good * 2) + 1), keep);
+        if (store) {
+	    stl_raw((void *)((uint32_t)phys_ram_base + base + (good * 8) + 4),
+		    keep);
+	}
     }
 
     return ret;
@@ -290,29 +294,37 @@ static int get_segment (CPUState *env, uint32_t *real, int *prot,
 
     sr = env->sr[virtual >> 28];
 #if defined (DEBUG_MMU)
-    printf("Check segment v=0x%08x %d 0x%08x nip=0x%08x lr=0x%08x ir=%d dr=%d "
-           "pr=%d t=%d\n", virtual, virtual >> 28, sr, env->nip,
-           env->lr, msr_ir, msr_dr, msr_pr, type);
+    if (loglevel > 0) {
+	fprintf(logfile, "Check segment v=0x%08x %d 0x%08x nip=0x%08x "
+		"lr=0x%08x ir=%d dr=%d pr=%d %d t=%d\n",
+		virtual, virtual >> 28, sr, env->nip,
+		env->lr, msr_ir, msr_dr, msr_pr, rw, type);
+    }
 #endif
-    key = ((sr & 0x20000000) && msr_pr == 1) ||
-        ((sr & 0x40000000) && msr_pr == 0) ? 1 : 0;
+    key = (((sr & 0x20000000) && msr_pr == 1) ||
+        ((sr & 0x40000000) && msr_pr == 0)) ? 1 : 0;
     if ((sr & 0x80000000) == 0) {
 #if defined (DEBUG_MMU)
-        printf("pte segment: key=%d n=0x%08x\n", key, sr & 0x10000000);
+	if (loglevel > 0)
+	    fprintf(logfile, "pte segment: key=%d n=0x%08x\n",
+		    key, sr & 0x10000000);
 #endif
         /* Check if instruction fetch is allowed, if needed */
         if (type != ACCESS_CODE || (sr & 0x10000000) == 0) {
             /* Page address translation */
             vsid = sr & 0x00FFFFFF;
             pgidx = (virtual >> 12) & 0xFFFF;
-            sdr = env->spr[SDR1];
-            hash = ((vsid ^ pgidx) & 0x07FFFF) << 6;
+            sdr = env->sdr1;
+            hash = ((vsid ^ pgidx) & 0x0007FFFF) << 6;
             mask = ((sdr & 0x000001FF) << 16) | 0xFFC0;
             pg_addr = get_pgaddr(sdr, hash, mask);
             ptem = (vsid << 7) | (pgidx >> 10);
 #if defined (DEBUG_MMU)
-            printf("0 sdr1=0x%08x vsid=0x%06x api=0x%04x hash=0x%07x "
-                   "pg_addr=0x%08x\n", sdr, vsid, pgidx, hash, pg_addr);
+	    if (loglevel > 0) {
+		fprintf(logfile, "0 sdr1=0x%08x vsid=0x%06x api=0x%04x "
+			"hash=0x%07x pg_addr=0x%08x\n", sdr, vsid, pgidx, hash,
+			pg_addr);
+	    }
 #endif
             /* Primary table lookup */
             ret = find_pte(real, prot, pg_addr, ptem, 0, key, rw);
@@ -321,25 +333,27 @@ static int get_segment (CPUState *env, uint32_t *real, int *prot,
                 hash = (~hash) & 0x01FFFFC0;
                 pg_addr = get_pgaddr(sdr, hash, mask);
 #if defined (DEBUG_MMU)
-                printf("1 sdr1=0x%08x vsid=0x%06x api=0x%04x hash=0x%05x "
-                       "pg_addr=0x%08x\n", sdr, vsid, pgidx, hash, pg_addr);
+		if (virtual != 0xEFFFFFFF && loglevel > 0) {
+		    fprintf(logfile, "1 sdr1=0x%08x vsid=0x%06x api=0x%04x "
+			    "hash=0x%05x pg_addr=0x%08x\n", sdr, vsid, pgidx,
+			    hash, pg_addr);
+		}
 #endif
                 ret2 = find_pte(real, prot, pg_addr, ptem, 1, key, rw);
                 if (ret2 != -1)
                     ret = ret2;
             }
-            if (ret != -1)
-                *real |= (virtual & 0x00000FFF);
-            if (ret == -2 && type == ACCESS_CODE && (sr & 0x10000000))
-                ret = -3;
         } else {
 #if defined (DEBUG_MMU)
-            printf("No access allowed\n");
+	    if (loglevel > 0)
+		fprintf(logfile, "No access allowed\n");
 #endif
+	    ret = -3;
         }
     } else {
 #if defined (DEBUG_MMU)
-        printf("direct store...\n");
+        if (loglevel > 0)
+	    fprintf(logfile, "direct store...\n");
 #endif
         /* Direct-store segment : absolutely *BUGGY* for now */
         switch (type) {
@@ -393,9 +407,10 @@ int get_physical_address (CPUState *env, uint32_t *physical, int *prot,
     if (loglevel > 0) {
         fprintf(logfile, "%s\n", __func__);
     }
+    
     if ((access_type == ACCESS_CODE && msr_ir == 0) || msr_dr == 0) {
         /* No address translation */
-        *physical = address;
+        *physical = address & ~0xFFF;
         *prot = PROT_READ | PROT_WRITE;
         ret = 0;
     } else {
@@ -406,6 +421,10 @@ int get_physical_address (CPUState *env, uint32_t *physical, int *prot,
             ret = get_segment(env, physical, prot, address, rw, access_type);
         }
     }
+    if (loglevel > 0) {
+        fprintf(logfile, "%s address %08x => %08x\n",
+		__func__, address, *physical);
+    }
     
     return ret;
 }
@@ -448,18 +467,17 @@ target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
    NULL, it means that the function was called in C code (i.e. not
    from generated code or from helper.c) */
 /* XXX: fix it to restore all registers */
-void tlb_fill(unsigned long addr, int is_write, int flags, void *retaddr)
+void tlb_fill(unsigned long addr, int is_write, int is_user, void *retaddr)
 {
     TranslationBlock *tb;
-    int ret, is_user;
-    unsigned long pc;
     CPUState *saved_env;
+    unsigned long pc;
+    int ret;
 
     /* XXX: hack to restore env in all cases, even if not called from
        generated code */
     saved_env = env;
     env = cpu_single_env;
-    is_user = flags & 0x01;
     {
         unsigned long tlb_addrr, tlb_addrw;
         int index;
@@ -474,7 +492,7 @@ void tlb_fill(unsigned long addr, int is_write, int flags, void *retaddr)
                tlb_addrr & (TARGET_PAGE_MASK | TLB_INVALID_MASK));
 #endif
     }
-    ret = cpu_handle_mmu_fault(env, addr, is_write, flags, 1);
+    ret = cpu_ppc_handle_mmu_fault(env, addr, is_write, is_user, 1);
     if (ret) {
         if (retaddr) {
             /* now we have a real cpu fault */
@@ -506,7 +524,7 @@ void tlb_fill(unsigned long addr, int is_write, int flags, void *retaddr)
     env = saved_env;
 }
 
-void cpu_ppc_init_mmu(CPUPPCState *env)
+void cpu_ppc_init_mmu(CPUState *env)
 {
     /* Nothing to do: all translation are disabled */
 }
@@ -514,59 +532,36 @@ void cpu_ppc_init_mmu(CPUPPCState *env)
 
 /* Perform address translation */
 int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
-                              int flags, int is_softmmu)
+                              int is_user, int is_softmmu)
 {
     uint32_t physical;
     int prot;
     int exception = 0, error_code = 0;
-    int is_user, access_type;
+    int access_type;
     int ret = 0;
 
 //    printf("%s 0\n", __func__);
-    is_user = flags & 0x01;
     access_type = env->access_type;
     if (env->user_mode_only) {
         /* user mode only emulation */
         ret = -1;
         goto do_fault;
     }
+    /* NASTY BUG workaround */
+    if (access_type == ACCESS_CODE && rw) {
+	//	printf("%s: ERROR WRITE CODE ACCESS\n", __func__);
+	access_type = ACCESS_INT;
+    }
     ret = get_physical_address(env, &physical, &prot,
                                address, rw, access_type);
     if (ret == 0) {
-        ret = tlb_set_page(env, address, physical, prot, is_user, is_softmmu);
+	ret = tlb_set_page(env, address & ~0xFFF, physical, prot,
+			   is_user, is_softmmu);
     } else if (ret < 0) {
     do_fault:
 #if defined (DEBUG_MMU)
-        printf("%s 5\n", __func__);
-        printf("nip=0x%08x LR=0x%08x CTR=0x%08x MSR=0x%08x TBL=0x%08x\n",
-               env->nip, env->lr, env->ctr, /*msr*/0, env->tb[0]);
-        {
-            int  i;
-            for (i = 0; i < 32; i++) {
-                if ((i & 7) == 0)
-                    printf("GPR%02d:", i);
-                printf(" %08x", env->gpr[i]);
-                if ((i & 7) == 7)
-                    printf("\n");
-            }
-            printf("CR: 0x");
-            for (i = 0; i < 8; i++)
-                printf("%01x", env->crf[i]);
-            printf("  [");
-            for (i = 0; i < 8; i++) {
-                char a = '-';
-                if (env->crf[i] & 0x08)
-                    a = 'L';
-                else if (env->crf[i] & 0x04)
-                    a = 'G';
-                else if (env->crf[i] & 0x02)
-                    a = 'E';
-                printf(" %c%c", a, env->crf[i] & 0x01 ? 'O' : ' ');
-            }
-            printf(" ] ");
-        }
-        printf("TB: 0x%08x %08x\n", env->tb[1], env->tb[0]);
-        printf("SRR0 0x%08x SRR1 0x%08x\n", env->spr[SRR0], env->spr[SRR1]);
+	if (loglevel > 0)
+	    cpu_ppc_dump_state(env, logfile, 0);
 #endif
         if (access_type == ACCESS_CODE) {
             exception = EXCP_ISI;
@@ -580,13 +575,13 @@ int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
                 error_code = EXCP_ISI_PROT;
                 break;
             case -3:
+		/* No execute protection violation */
                 error_code = EXCP_ISI_NOEXEC;
                 break;
             case -4:
                 /* Direct store exception */
                 /* No code fetch is allowed in direct-store areas */
-                exception = EXCP_ISI;
-                error_code = EXCP_ISI_NOEXEC;
+                error_code = EXCP_ISI_DIRECT;
                 break;
             }
         } else {
@@ -612,15 +607,15 @@ int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
                     /* lwarx, ldarx or srwcx. */
                     exception = EXCP_DSI;
                     error_code = EXCP_DSI_NOTSUP | EXCP_DSI_DIRECT;
-                    if (rw)
-                        error_code |= EXCP_DSI_STORE;
                     break;
                 case ACCESS_EXT:
                     /* eciwx or ecowx */
                     exception = EXCP_DSI;
-                    error_code = EXCP_DSI_NOTSUP | EXCP_DSI_DIRECT | EXCP_ECXW;
+                    error_code = EXCP_DSI_NOTSUP | EXCP_DSI_DIRECT |
+			EXCP_DSI_ECXW;
                     break;
                 default:
+		    printf("DSI: invalid exception (%d)\n", ret);
                     exception = EXCP_PROGRAM;
                     error_code = EXCP_INVAL | EXCP_INVAL_INVAL;
                     break;
@@ -628,27 +623,8 @@ int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
             }
             if (rw)
                 error_code |= EXCP_DSI_STORE;
-            /* Should find a better solution:
-             * this will be invalid for some exception if more than one
-             * exception occurs for one instruction
-             */
-            env->spr[DSISR] = 0;
-            if (error_code & EXCP_DSI_DIRECT) {
-                env->spr[DSISR] |= 0x80000000;
-                if (access_type == ACCESS_EXT ||
-                    access_type == ACCESS_RES)
-                    env->spr[DSISR] |= 0x04000000;
-            }
-            if ((error_code & 0xF) == EXCP_DSI_TRANSLATE)
-                env->spr[DSISR] |= 0x40000000;
-            if (error_code & EXCP_DSI_PROT)
-                env->spr[DSISR] |= 0x08000000;
-            if (error_code & EXCP_DSI_STORE)
-                env->spr[DSISR] |= 0x02000000;
-            if ((error_code & 0xF) == EXCP_DSI_DABR)
-                env->spr[DSISR] |= 0x00400000;
-            if (access_type == ACCESS_EXT)
-                env->spr[DSISR] |= 0x00100000;
+	    /* Store fault address */
+	    env->spr[DAR] = address;
         }
 #if 0
         printf("%s: set exception to %d %02x\n",
@@ -656,15 +632,13 @@ int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
 #endif
         env->exception_index = exception;
         env->error_code = error_code;
-        /* Store fault address */
-        env->spr[DAR] = address;
         ret = 1;
     }
 
     return ret;
 }
 
-uint32_t _load_xer (void)
+uint32_t _load_xer (CPUState *env)
 {
     return (xer_so << XER_SO) |
         (xer_ov << XER_OV) |
@@ -672,7 +646,7 @@ uint32_t _load_xer (void)
         (xer_bc << XER_BC);
 }
 
-void _store_xer (uint32_t value)
+void _store_xer (CPUState *env, uint32_t value)
 {
     xer_so = (value >> XER_SO) & 0x01;
     xer_ov = (value >> XER_OV) & 0x01;
@@ -680,7 +654,7 @@ void _store_xer (uint32_t value)
     xer_bc = (value >> XER_BC) & 0x1f;
 }
 
-uint32_t _load_msr (void)
+uint32_t _load_msr (CPUState *env)
 {
     return (msr_pow << MSR_POW) |
         (msr_ile << MSR_ILE) |
@@ -699,8 +673,13 @@ uint32_t _load_msr (void)
         (msr_le << MSR_LE);
 }
 
-void _store_msr (uint32_t value)
+void _store_msr (CPUState *env, uint32_t value)
 {
+    if (((T0 >> MSR_IR) & 0x01) != msr_ir ||
+        ((T0 >> MSR_DR) & 0x01) != msr_dr) {
+        /* Flush all tlb when changing translation mode or privilege level */
+        do_tlbia();
+    }
     msr_pow = (value >> MSR_POW) & 0x03;
     msr_ile = (value >> MSR_ILE) & 0x01;
     msr_ee = (value >> MSR_EE) & 0x01;
@@ -729,47 +708,16 @@ void do_interrupt (CPUState *env)
     /* Dequeue PPC exceptions */
     if (excp < EXCP_PPC_MAX)
         env->exceptions &= ~(1 << excp);
-    msr = _load_msr();
+    msr = _load_msr(env);
 #if defined (DEBUG_EXCEPTIONS)
-    if (excp != EXCP_DECR && excp == EXCP_PROGRAM && excp < EXCP_PPC_MAX) 
+    if ((excp == EXCP_PROGRAM || excp == EXCP_DSI) && msr_pr == 1) 
     {
         if (loglevel > 0) {
             fprintf(logfile, "Raise exception at 0x%08x => 0x%08x (%02x)\n",
                     env->nip, excp << 8, env->error_code);
-        } else {
-            printf("Raise exception at 0x%08x => 0x%08x (%02x)\n",
-                   env->nip, excp << 8, env->error_code);
-        }
-        printf("nip=0x%08x LR=0x%08x CTR=0x%08x MSR=0x%08x DECR=0x%08x\n",
-               env->nip, env->lr, env->ctr, msr, env->decr);
-        {
-    int i;
-            for (i = 0; i < 32; i++) {
-                if ((i & 7) == 0)
-                    printf("GPR%02d:", i);
-                printf(" %08x", env->gpr[i]);
-                if ((i & 7) == 7)
-                    printf("\n");
-    }
-            printf("CR: 0x");
-    for (i = 0; i < 8; i++)
-                printf("%01x", env->crf[i]);
-            printf("  [");
-            for (i = 0; i < 8; i++) {
-                char a = '-';
-                if (env->crf[i] & 0x08)
-                    a = 'L';
-                else if (env->crf[i] & 0x04)
-                    a = 'G';
-                else if (env->crf[i] & 0x02)
-                    a = 'E';
-                printf(" %c%c", a, env->crf[i] & 0x01 ? 'O' : ' ');
     }
-            printf(" ] ");
-    }
-        printf("TB: 0x%08x %08x\n", env->tb[1], env->tb[0]);
-        printf("XER 0x%08x SRR0 0x%08x SRR1 0x%08x\n",
-               _load_xer(), env->spr[SRR0], env->spr[SRR1]);
+	if (loglevel > 0)
+	    cpu_ppc_dump_state(env, logfile, 0);
     }
 #endif
     /* Generate informations in save/restore registers */
@@ -812,26 +760,63 @@ void do_interrupt (CPUState *env)
         /* data location address has been stored
          * when the fault has been detected
      */
-        goto store_current;
+	msr &= ~0xFFFF0000;
+	env->spr[DSISR] = 0;
+	if (env->error_code &  EXCP_DSI_TRANSLATE)
+	    env->spr[DSISR] |= 0x40000000;
+	else if (env->error_code & EXCP_DSI_PROT)
+	    env->spr[DSISR] |= 0x08000000;
+	else if (env->error_code & EXCP_DSI_NOTSUP) {
+	    env->spr[DSISR] |= 0x80000000;
+	    if (env->error_code & EXCP_DSI_DIRECT)
+		env->spr[DSISR] |= 0x04000000;
+	}
+	if (env->error_code & EXCP_DSI_STORE)
+	    env->spr[DSISR] |= 0x02000000;
+	if ((env->error_code & 0xF) == EXCP_DSI_DABR)
+	    env->spr[DSISR] |= 0x00400000;
+	if (env->error_code & EXCP_DSI_ECXW)
+	    env->spr[DSISR] |= 0x00100000;
+#if defined (DEBUG_EXCEPTIONS)
+	if (loglevel) {
+	    fprintf(logfile, "DSI exception: DSISR=0x%08x, DAR=0x%08x\n",
+		    env->spr[DSISR], env->spr[DAR]);
+	} else {
+	    printf("DSI exception: DSISR=0x%08x, DAR=0x%08x nip=0x%08x\n",
+		   env->spr[DSISR], env->spr[DAR], env->nip);
+	}
+#endif
+        goto store_next;
     case EXCP_ISI:
         /* Store exception cause */
+	msr &= ~0xFFFF0000;
         if (env->error_code == EXCP_ISI_TRANSLATE)
             msr |= 0x40000000;
         else if (env->error_code == EXCP_ISI_NOEXEC ||
-            env->error_code == EXCP_ISI_GUARD)
+		 env->error_code == EXCP_ISI_GUARD ||
+		 env->error_code == EXCP_ISI_DIRECT)
             msr |= 0x10000000;
         else
             msr |= 0x08000000;
+#if defined (DEBUG_EXCEPTIONS)
+	if (loglevel) {
+	    fprintf(logfile, "ISI exception: msr=0x%08x, nip=0x%08x\n",
+		    msr, env->nip);
+	} else {
+	    printf("ISI exception: msr=0x%08x, nip=0x%08x tbl:0x%08x\n",
+		   msr, env->nip, env->spr[V_TBL]);
+	}
+#endif
         goto store_next;
     case EXCP_EXTERNAL:
         if (msr_ee == 0) {
 #if defined (DEBUG_EXCEPTIONS)
             if (loglevel > 0) {
                 fprintf(logfile, "Skipping hardware interrupt\n");
-            } else {
-                printf("Skipping hardware interrupt\n");
     }
 #endif
+            /* Requeue it */
+            do_queue_exception(EXCP_EXTERNAL);
             return;
             }
         goto store_next;
@@ -863,6 +848,7 @@ void do_interrupt (CPUState *env)
                 env->fpscr[7] |= 0x4;
         break;
         case EXCP_INVAL:
+	    printf("Invalid instruction at 0x%08x\n", env->nip);
             msr |= 0x00080000;
         break;
         case EXCP_PRIV:
@@ -888,8 +874,17 @@ void do_interrupt (CPUState *env)
         goto store_next;
     case EXCP_SYSCALL:
 #if defined (DEBUG_EXCEPTIONS)
-        printf("syscall %d 0x%08x 0x%08x 0x%08x 0x%08x\n",
-               env->gpr[0], env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6]);
+	if (msr_pr) {
+	    if (loglevel) {
+		fprintf(logfile, "syscall %d 0x%08x 0x%08x 0x%08x 0x%08x\n",
+			env->gpr[0], env->gpr[3], env->gpr[4],
+			env->gpr[5], env->gpr[6]);
+	    } else {
+		printf("syscall %d from 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
+		       env->gpr[0], env->nip, env->gpr[3], env->gpr[4],
+		       env->gpr[5], env->gpr[6]);
+	    }
+	}
 #endif
         goto store_next;
     case EXCP_TRACE:
@@ -898,20 +893,16 @@ void do_interrupt (CPUState *env)
         goto store_next;
     case EXCP_MTMSR:
         /* Nothing to do */
-#if defined (DEBUG_EXCEPTIONS)
-        printf("%s: escape EXCP_MTMSR\n", __func__);
-#endif
         return;
     case EXCP_BRANCH:
         /* Nothing to do */
-#if defined (DEBUG_EXCEPTIONS)
-        printf("%s: escape EXCP_BRANCH\n", __func__);
-#endif
         return;
     case EXCP_RFI:
         /* Restore user-mode state */
+	tb_flush(env);
 #if defined (DEBUG_EXCEPTIONS)
-        printf("%s: escape EXCP_RFI\n", __func__);
+	if (msr_pr == 1)
+	    printf("Return from exception => 0x%08x\n", (uint32_t)env->nip);
 #endif
         return;
     store_current:
diff --git a/target-ppc/hw.c b/target-ppc/hw.c
deleted file mode 100644
index 090b610..0000000
--- a/target-ppc/hw.c
+++ /dev/null
@@ -1,935 +0,0 @@
-/*
- * Hardware simulation for PPC target.
- * For now, this is only a 'minimal' collection of hacks needed to boot Linux.
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <string.h>
-#include <ctype.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <unistd.h>
-#include <time.h>
-
-#include "cpu.h"
-#include "vl.h"
-
-//#define HARD_DEBUG_PPC_IO
-#define DEBUG_PPC_IO
-
-extern int loglevel;
-extern FILE *logfile;
-
-#if defined (HARD_DEBUG_PPC_IO) && !defined (DEBUG_PPC_IO)
-#define DEBUG_PPC_IO
-#endif
-
-#if defined (HARD_DEBUG_PPC_IO)
-#define PPC_IO_DPRINTF(fmt, args...)                     \
-do {                                                     \
-    if (loglevel > 0) {                                  \
-        fprintf(logfile, "%s: " fmt, __func__ , ##args); \
-    } else {                                             \
-        printf("%s : " fmt, __func__ , ##args);          \
-    }                                                    \
-} while (0)
-#elif defined (DEBUG_PPC_IO)
-#define PPC_IO_DPRINTF(fmt, args...)                     \
-do {                                                     \
-    if (loglevel > 0) {                                  \
-        fprintf(logfile, "%s: " fmt, __func__ , ##args); \
-    }                                                    \
-} while (0)
-#else
-#define PPC_IO_DPRINTF(fmt, args...) do { } while (0)
-#endif
-
-#if defined (USE_OPEN_FIRMWARE)
-#include "of.h"
-#else
-#define NVRAM_SIZE 0x2000
-#endif
-
-/* IO ports emulation */
-#define PPC_IO_BASE 0x80000000
-
-static void PPC_io_writeb (uint32_t addr, uint32_t value)
-{
-    /* Don't polute serial port output */
-    if ((addr < 0x800003F0 || addr > 0x80000400) &&
-        (addr < 0x80000074 || addr > 0x80000077) &&
-        (addr < 0x80000020 || addr > 0x80000021) &&
-        (addr < 0x800000a0 || addr > 0x800000a1) &&
-        (addr < 0x800001f0 || addr > 0x800001f7) &&
-        (addr < 0x80000170 || addr > 0x80000177)) {
-        PPC_IO_DPRINTF("0x%08x => 0x%02x\n", addr - PPC_IO_BASE, value);
-    }
-    cpu_outb(NULL, addr - PPC_IO_BASE, value);
-}
-
-static uint32_t PPC_io_readb (uint32_t addr)
-{
-    uint32_t ret = cpu_inb(NULL, addr - PPC_IO_BASE);
-
-    if ((addr < 0x800003F0 || addr > 0x80000400) &&
-        (addr < 0x80000074 || addr > 0x80000077) &&
-        (addr < 0x80000020 || addr > 0x80000021) &&
-        (addr < 0x800000a0 || addr > 0x800000a1) &&
-        (addr < 0x800001f0 || addr > 0x800001f7) &&
-        (addr < 0x80000170 || addr > 0x80000177) &&
-        (addr < 0x8000060 || addr > 0x8000064)) {
-//        PPC_IO_DPRINTF("0x%08x <= 0x%02x\n", addr - PPC_IO_BASE, ret);
-    }
-
-    return ret;
-}
-
-static void PPC_io_writew (uint32_t addr, uint32_t value)
-{
-    if ((addr < 0x800001f0 || addr > 0x800001f7) &&
-        (addr < 0x80000170 || addr > 0x80000177)) {
-        PPC_IO_DPRINTF("0x%08x => 0x%04x\n", addr - PPC_IO_BASE, value);
-    }
-    cpu_outw(NULL, addr - PPC_IO_BASE, value);
-}
-
-static uint32_t PPC_io_readw (uint32_t addr)
-{
-    uint32_t ret = cpu_inw(NULL, addr - PPC_IO_BASE);
-
-    if ((addr < 0x800001f0 || addr > 0x800001f7) &&
-        (addr < 0x80000170 || addr > 0x80000177)) {
-        PPC_IO_DPRINTF("0x%08x <= 0x%04x\n", addr - PPC_IO_BASE, ret);
-    }
-
-    return ret;
-}
-
-static void PPC_io_writel (uint32_t addr, uint32_t value)
-{
-    PPC_IO_DPRINTF("0x%08x => 0x%08x\n", addr - PPC_IO_BASE, value);
-    cpu_outl(NULL, addr - PPC_IO_BASE, value);
-}
-
-static uint32_t PPC_io_readl (uint32_t addr)
-{
-    uint32_t ret = cpu_inl(NULL, addr - PPC_IO_BASE);
-
-    PPC_IO_DPRINTF("0x%08x <= 0x%08x\n", addr - PPC_IO_BASE, ret);
-
-    return ret;
-}
-
-static CPUWriteMemoryFunc *PPC_io_write[] = {
-    &PPC_io_writeb,
-    &PPC_io_writew,
-    &PPC_io_writel,
-};
-
-static CPUReadMemoryFunc *PPC_io_read[] = {
-    &PPC_io_readb,
-    &PPC_io_readw,
-    &PPC_io_readl,
-};
-
-uint32_t pic_intack_read(CPUState *env);
-
-/* Read-only register (?) */
-static void _PPC_ioB_write (uint32_t addr, uint32_t value)
-{
-    PPC_IO_DPRINTF("0x%08x => 0x%08x\n", addr, value);
-}
-
-static uint32_t _PPC_ioB_read (uint32_t addr)
-{
-    uint32_t retval = 0;
-
-    if (addr == 0xBFFFFFF0)
-        retval = pic_intack_read(NULL);
-    PPC_IO_DPRINTF("0x%08x <= 0x%08x\n", addr, retval);
-
-    return retval;
-}
-
-static CPUWriteMemoryFunc *PPC_ioB_write[] = {
-    &_PPC_ioB_write,
-    &_PPC_ioB_write,
-    &_PPC_ioB_write,
-};
-
-static CPUReadMemoryFunc *PPC_ioB_read[] = {
-    &_PPC_ioB_read,
-    &_PPC_ioB_read,
-    &_PPC_ioB_read,
-};
-
-#if 0
-static CPUWriteMemoryFunc *PPC_io3_write[] = {
-    &PPC_io3_writeb,
-    &PPC_io3_writew,
-    &PPC_io3_writel,
-};
-
-static CPUReadMemoryFunc *PPC_io3_read[] = {
-    &PPC_io3_readb,
-    &PPC_io3_readw,
-    &PPC_io3_readl,
-};
-#endif
-
-/* Fake super-io ports for PREP platform (Intel 82378ZB) */
-static uint8_t PREP_fake_io[2];
-static uint8_t NVRAM_lock;
-
-static void PREP_io_write (CPUState *env, uint32_t addr, uint32_t val)
-{
-    PREP_fake_io[addr - 0x0398] = val;
-}
-
-static uint32_t PREP_io_read (CPUState *env, uint32_t addr)
-{
-    return PREP_fake_io[addr - 0x0398];
-}
-
-static uint8_t syscontrol;
-
-static void PREP_io_800_writeb (CPUState *env, uint32_t addr, uint32_t val)
-{
-    switch (addr) {
-    case 0x0092:
-        /* Special port 92 */
-        /* Check soft reset asked */
-        if (val & 0x80) {
-            printf("Soft reset asked... Stop emulation\n");
-            abort();
-        }
-        /* Check LE mode */
-        if (val & 0x40) {
-            printf("Little Endian mode isn't supported (yet ?)\n");
-            abort();
-        }
-        break;
-    case 0x0808:
-        /* Hardfile light register: don't care */
-        break;
-    case 0x0810:
-        /* Password protect 1 register */
-        NVRAM_lock ^= 0x01;
-        break;
-    case 0x0812:
-        /* Password protect 2 register */
-        NVRAM_lock ^= 0x02;
-        break;
-    case 0x0814:
-        /* L2 invalidate register: don't care */
-        break;
-    case 0x081C:
-        /* system control register */
-        syscontrol = val;
-        break;
-    case 0x0850:
-        /* I/O map type register */
-        if (val & 0x80) {
-            printf("No support for non-continuous I/O map mode\n");
-            abort();
-        }
-        break;
-    default:
-        break;
-    }
-}
-
-static uint32_t PREP_io_800_readb (CPUState *env, uint32_t addr)
-{
-    uint32_t retval = 0xFF;
-
-    switch (addr) {
-    case 0x0092:
-        /* Special port 92 */
-        retval = 0x40;
-        break;
-    case 0x080C:
-        /* Equipment present register:
-         *  no L2 cache
-         *  no upgrade processor
-         *  no cards in PCI slots
-         *  SCSI fuse is bad
-         */
-        retval = 0xFC;
-        break;
-    case 0x0818:
-        /* Keylock */
-        retval = 0x00;
-        break;
-    case 0x081C:
-        /* system control register
-         * 7 - 6 / 1 - 0: L2 cache enable
-         */
-        retval = syscontrol;
-        break;
-    case 0x0823:
-        /* */
-        retval = 0x03; /* no L2 cache */
-        break;
-    case 0x0850:
-        /* I/O map type register */
-        retval = 0x00;
-        break;
-    default:
-        break;
-    }
-
-    return retval;
-}
-
-/* M48T59 NVRAM/RTC emulation */
-static uint8_t NVRAM[NVRAM_SIZE];
-
-/* RTC */
-static time_t time_offset;
-
-time_t get_time (void)
-{
-    return time(NULL) + time_offset;
-}
-
-void set_time_offset (time_t new_time)
-{
-    time_t now = time(NULL);
-
-    time_offset = new_time - now;
-}
-
-static void NVRAM_init (void)
-{
-    /* NVRAM header */
-    /* 0x00: NVRAM size in kB */
-    NVRAM[0x00] = (NVRAM_SIZE >> 12) & 0xFF;
-    NVRAM[0x01] = (NVRAM_SIZE >> 10) & 0xFF;
-    /* 0x02: NVRAM version */
-    NVRAM[0x02] = 0x01;
-    /* 0x03: NVRAM revision */
-    NVRAM[0x03] = 0x00;
-    /* 0x04: checksum 0 => OS area   */
-    /* 0x06: checksum of config area */
-    /* 0x08: last OS */
-    NVRAM[0x08] = 0x00; /* Unknown */
-    /* 0x09: endian */
-    NVRAM[0x09] = 'B';
-    /* 0x0B: PM mode */
-    NVRAM[0x0B] = 0x00;
-    /* Restart block description record */
-    /* 0x0C: restart block version */
-    NVRAM[0x0C] = 0x00;
-    NVRAM[0x0D] = 0x01;
-    /* 0x0E: restart block revision */
-    NVRAM[0x0E] = 0x00;
-    NVRAM[0x0F] = 0x00;
-    /* 0x1C: checksum of restart block */
-    /* 0x20: restart address */
-    NVRAM[0x20] = 0x00;
-    NVRAM[0x21] = 0x00;
-    NVRAM[0x22] = 0x00;
-    NVRAM[0x23] = 0x00;
-    /* 0x24: save area address */
-    NVRAM[0x24] = 0x00;
-    NVRAM[0x25] = 0x00;
-    NVRAM[0x26] = 0x00;
-    NVRAM[0x27] = 0x00;
-    /* 0x28: save area length */
-    NVRAM[0x28] = 0x00;
-    NVRAM[0x29] = 0x00;
-    NVRAM[0x2A] = 0x00;
-    NVRAM[0x2B] = 0x00;
-    /* Security section */
-    /* Set all to zero */
-    /* 0xC4: pointer to global environment area */
-    NVRAM[0xC4] = 0x00;
-    NVRAM[0xC5] = 0x00;
-    NVRAM[0xC6] = 0x01;
-    NVRAM[0xC7] = 0x00;
-    /* 0xC8: size of global environment area */
-    NVRAM[0xC8] = 0x00;
-    NVRAM[0xC9] = 0x00;
-    NVRAM[0xCA] = 0x07;
-    NVRAM[0xCB] = 0x00;
-    /* 0xD4: pointer to configuration area */
-    NVRAM[0xD4] = 0x00;
-    NVRAM[0xD5] = 0x00;
-    NVRAM[0xD6] = 0x08;
-    NVRAM[0xD7] = 0x00;
-    /* 0xD8: size of configuration area */
-    NVRAM[0xD8] = 0x00;
-    NVRAM[0xD9] = 0x00;
-    NVRAM[0xDA] = 0x08;
-    NVRAM[0xDB] = 0x00;
-    /* 0xE8: pointer to OS specific area */
-    NVRAM[0xE8] = 0x00;
-    NVRAM[0xE9] = 0x00;
-    NVRAM[0xEA] = 0x10;
-    NVRAM[0xEB] = 0x00;
-    /* 0xD8: size of OS specific area */
-    NVRAM[0xEC] = 0x00;
-    NVRAM[0xED] = 0x00;
-    NVRAM[0xEE] = 0x0F;
-    NVRAM[0xEF] = 0xF0;
-    /* CRC */
-    /* RTC init */
-    NVRAM[0x1FFC] = 0x50;
-}
-
-static uint16_t NVRAM_addr;
-
-/* Direct access to NVRAM */
-void NVRAM_write (CPUState *env, uint32_t addr, uint32_t val)
-{
-    switch (addr) {
-    case 0x1FF0:
-        /* flags register */
-        break;
-    case 0x1FF1:
-        /* unused */
-        break;
-    case 0x1FF2:
-        /* alarm seconds */
-        break;
-    case 0x1FF3:
-        /* alarm minutes */
-        break;
-    case 0x1FF4:
-        /* alarm hours */
-        break;
-    case 0x1FF5:
-        /* alarm date */
-        break;
-    case 0x1FF6:
-        /* interrupts */
-        break;
-    case 0x1FF7:
-        /* watchdog */
-        break;
-    case 0x1FF8:
-        /* control */
-        break;
-    case 0x1FF9:
-        /* seconds (BCD) */
-        break;
-    case 0x1FFA:
-        /* minutes (BCD) */
-        break;
-    case 0x1FFB:
-        /* hours (BCD) */
-        break;
-    case 0x1FFC:
-        /* day of the week / century */
-        NVRAM[0x1FFC] = val & 0x50;
-        break;
-    case 0x1FFD:
-        /* date */
-        break;
-    case 0x1FFE:
-        /* month */
-        break;
-    case 0x1FFF:
-        /* year */
-        break;
-    default:
-        if (addr < NVRAM_SIZE)
-            NVRAM[addr] = val & 0xFF;
-        break;
-    }
-}
-
-uint32_t NVRAM_read (CPUState *env, uint32_t addr)
-{
-    struct tm tm;
-    time_t t;
-    uint32_t retval = 0xFF;
-
-    switch (addr) {
-    case 0x1FF0:
-        /* flags register */
-        break;
-    case 0x1FF1:
-        /* unused */
-        break;
-    case 0x1FF2:
-        /* alarm seconds */
-        break;
-    case 0x1FF3:
-        /* alarm minutes */
-        break;
-    case 0x1FF4:
-        /* alarm hours */
-        break;
-    case 0x1FF5:
-        /* alarm date */
-        break;
-    case 0x1FF6:
-        /* interrupts */
-        break;
-    case 0x1FF7:
-        /* watchdog */
-        break;
-    case 0x1FF8:
-        /* control */
-        break;
-    case 0x1FF9:
-        /* seconds (BCD) */
-        t = get_time();
-        localtime_r(&t, &tm);
-        retval = ((tm.tm_sec / 10) << 4) | (tm.tm_sec % 10);
-//            printf("return seconds=%d\n", tm.tm_sec);
-        break;
-    case 0x1FFA:
-        /* minutes (BCD) */
-        t = get_time();
-        localtime_r(&t, &tm);
-        retval = ((tm.tm_min / 10) << 4) | (tm.tm_min % 10);
-        break;
-    case 0x1FFB:
-        /* hours (BCD) */
-        t = get_time();
-        localtime_r(&t, &tm);
-        retval = ((tm.tm_hour / 10) << 4) | (tm.tm_hour % 10);
-        break;
-    case 0x1FFC:
-        /* day of the week / century */
-        t = get_time();
-        localtime_r(&t, &tm);
-        retval = (NVRAM[0x1FFC] & 0x50) | tm.tm_wday;
-        break;
-    case 0x1FFD:
-        /* date */
-        t = get_time();
-        localtime_r(&t, &tm);
-        retval = ((tm.tm_mday / 10) << 4) | (tm.tm_mday % 10);
-        break;
-    case 0x1FFE:
-        /* month */
-        t = get_time();
-        localtime_r(&t, &tm);
-        retval = ((tm.tm_mon / 10) << 4) | (tm.tm_mon % 10);
-        break;
-    case 0x1FFF:
-        /* year */
-        t = get_time();
-        localtime_r(&t, &tm);
-        retval = ((tm.tm_year / 10) << 4) | (tm.tm_year % 10);
-        break;
-    default:
-        if (NVRAM_addr < NVRAM_SIZE)
-            retval = NVRAM[NVRAM_addr];
-        break;
-    }
-
-    return retval;
-}
-
-/* IO access to NVRAM */
-static void NVRAM_writeb (CPUState *env, uint32_t addr, uint32_t val)
-{
-    switch (addr) {
-    case 0x74:
-        NVRAM_addr &= ~0x00FF;
-        NVRAM_addr |= val;
-        break;
-    case 0x75:
-        NVRAM_addr &= ~0xFF00;
-        NVRAM_addr |= val << 8;
-        break;
-    case 0x77:
-        NVRAM_write(env, NVRAM_addr, val);
-        NVRAM_addr = 0x0000;
-        break;
-    default:
-        break;
-    }
-}
-
-static uint32_t NVRAM_readb (CPUState *env, uint32_t addr)
-{
-    if (addr == 0x77)
-        return NVRAM_read(env, NVRAM_addr);
-
-    return 0xFF;
-}
-
-int load_initrd (const char *filename, uint8_t *addr)
-{
-    int fd, size;
-
-    printf("Load initrd\n");
-    fd = open(filename, O_RDONLY);
-    if (fd < 0)
-        return -1;
-    size = read(fd, addr, 16 * 1024 * 1024);
-    if (size < 0)
-        goto fail;
-    close(fd);
-    printf("Load initrd: %d\n", size);
-    return size;
- fail:
-    close(fd);
-    printf("Load initrd failed\n");
-    return -1;
-}
-
-/* Quick hack for PPC memory infos... */
-static void put_long (void *addr, uint32_t l)
-{
-    char *pos = addr;
-    pos[0] = (l >> 24) & 0xFF;
-    pos[1] = (l >> 16) & 0xFF;
-    pos[2] = (l >> 8) & 0xFF;
-    pos[3] = l & 0xFF;
-}
-
-/* bootloader infos are in the form:
- * uint32_t TAG
- * uint32_t TAG_size (from TAG to next TAG).
- * datas
- * ....
- */
-#if !defined (USE_OPEN_FIRMWARE)
-static void *set_bootinfo_tag (void *addr, uint32_t tag, uint32_t size,
-                               void *data)
-{
-    char *pos = addr;
-
-    put_long(pos, tag);
-    pos += 4;
-    put_long(pos, size + 8);
-    pos += 4;
-    memcpy(pos, data, size);
-    pos += size;
-
-    return pos;
-}
-#endif
-
-typedef struct boot_dev_t {
-    const unsigned char *name;
-    int major;
-    int minor;
-} boot_dev_t;
-
-static boot_dev_t boot_devs[] = 
-{
-    { "/dev/fd0", 2, 0, },
-    { "/dev/fd1", 2, 1, },
-    { "/dev/hda1", 3, 1, },
-//    { "/dev/ide/host0/bus0/target0/lun0/part1", 3, 1, },
-    { "/dev/hdc", 22, 0, },
-    { "/dev/ram0 init=/linuxrc", 1, 0, },
-};
-
-/* BATU:
- * BEPI  : bloc virtual address
- * BL    : area size bits (128 kB is 0, 256 1, 512 3, ...
- * Vs/Vp
- * BATL:
- * BPRN  : bloc real address align on 4MB boundary
- * WIMG  : cache access mode : not used
- * PP    : protection bits
- */
-static void setup_BAT (CPUPPCState *env, int BAT,
-                       uint32_t virtual, uint32_t physical,
-                       uint32_t size, int Vs, int Vp, int PP)
-{
-    uint32_t sz_bits, tmp_sz, align, tmp;
-    
-    sz_bits = 0;
-    align = 131072;
-    for (tmp_sz = size / 131072; tmp_sz != 1; tmp_sz = tmp_sz >> 1) {
-        sz_bits = (sz_bits << 1) + 1;
-        align = align << 1;
-    }
-    tmp = virtual & ~(align - 1);  /* Align virtual area start */
-    tmp |= sz_bits << 2;           /* Fix BAT size             */
-    tmp |= Vs << 1;                /* Supervisor access        */
-    tmp |= Vp;                     /* User access              */
-    env->DBAT[0][BAT] = tmp;
-    env->IBAT[0][BAT] = tmp;
-    tmp = physical & ~(align - 1); /* Align physical area start */
-    tmp |= 0;                      /* Don't care about WIMG     */
-    tmp |= PP;                     /* Protection                */
-    env->DBAT[1][BAT] = tmp;
-    env->IBAT[1][BAT] = tmp;
-    printf("Set BATU0 to 0x%08x BATL0 to 0x%08x\n",
-           env->DBAT[0][BAT], env->DBAT[1][BAT]);
-}
-
-static void VGA_printf (uint8_t *s)
-{
-    uint16_t *arg_ptr;
-    unsigned int format_width, i;
-    int in_format;
-    uint16_t arg, digit, nibble;
-    uint8_t c;
-
-    arg_ptr = (uint16_t *)(&s);
-    in_format = 0;
-    format_width = 0;
-    while ((c = *s) != '\0') {
-        if (c == '%') {
-            in_format = 1;
-            format_width = 0;
-        } else if (in_format) {
-            if ((c >= '0') && (c <= '9')) {
-                format_width = (format_width * 10) + (c - '0');
-            } else if (c == 'x') {
-                arg_ptr++; // increment to next arg
-                arg = *arg_ptr;
-                if (format_width == 0)
-                    format_width = 4;
-                digit = format_width - 1;
-                for (i = 0; i < format_width; i++) {
-                    nibble = (arg >> (4 * digit)) & 0x000f;
-                    if (nibble <= 9)
-                        PPC_io_writeb(PPC_IO_BASE + 0x500, nibble + '0');
-                    else
-                        PPC_io_writeb(PPC_IO_BASE + 0x500, nibble + 'A');
-                    digit--;
-                }
-                in_format = 0;
-            }
-            //else if (c == 'd') {
-            //  in_format = 0;
-            //  }
-        } else {
-            PPC_io_writeb(PPC_IO_BASE + 0x500, c);
-        }
-        s++;
-    }
-}
-
-static void VGA_init (void)
-{
-    /* Basic VGA init, inspired by plex86 VGAbios */
-    printf("Init VGA...\n");
-    /* switch to color mode and enable CPU access 480 lines */
-    PPC_io_writeb(PPC_IO_BASE + 0x3C2, 0xC3);
-    /* more than 64k 3C4/04 */
-    PPC_io_writeb(PPC_IO_BASE + 0x3C4, 0x04);
-    PPC_io_writeb(PPC_IO_BASE + 0x3C5, 0x02);
-    VGA_printf("PPC VGA BIOS...\n");
-}
-
-void PPC_init_hw (CPUPPCState *env, uint32_t mem_size,
-                  uint32_t kernel_addr, uint32_t kernel_size,
-                  uint32_t stack_addr, int boot_device)
-{
-    char *p;
-#if !defined (USE_OPEN_FIRMWARE)
-    char *tmp;
-    uint32_t tmpi[2];
-#endif
-    int PPC_io_memory;
-    
-#if defined (USE_OPEN_FIRMWARE)
-    setup_memory(env, mem_size);
-#endif
-    /* Register 64 kB of IO space */
-    PPC_io_memory = cpu_register_io_memory(0, PPC_io_read, PPC_io_write);
-    cpu_register_physical_memory(0x80000000, 0x10000, PPC_io_memory);
-    /* Register fake IO ports for PREP */
-    register_ioport_read(0x398, 2, PREP_io_read, 1);
-    register_ioport_write(0x398, 2, PREP_io_write, 1);
-    /* System control ports */
-    register_ioport_write(0x0092, 0x1, PREP_io_800_writeb, 1);
-    register_ioport_read(0x0800, 0x52, PREP_io_800_readb, 1);
-    register_ioport_write(0x0800, 0x52, PREP_io_800_writeb, 1);
-    /* PCI intack location */
-    PPC_io_memory = cpu_register_io_memory(0, PPC_ioB_read, PPC_ioB_write);
-    cpu_register_physical_memory(0xBFFFFFF0, 0x4, PPC_io_memory);
-    /* NVRAM ports */
-    NVRAM_init();
-    register_ioport_read(0x0074, 0x04, NVRAM_readb, 1);
-    register_ioport_write(0x0074, 0x04, NVRAM_writeb, 1);
-
-    /* Fake bootloader */
-    env->nip = kernel_addr + (3 * sizeof(uint32_t));
-    /* Set up msr according to PREP specification */
-    msr_ee = 0;
-    msr_fp = 1;
-    msr_pr = 0; /* Start in supervisor mode */
-    msr_me = 1;
-    msr_fe0 = msr_fe1 = 0;
-    msr_ip = 0;
-    msr_ir = msr_dr = 1;
-//    msr_sf = 0;
-    msr_le = msr_ile = 0;
-    env->gpr[1] = stack_addr; /* Let's have a stack */
-    env->gpr[2] = 0;
-    env->gpr[8] = kernel_addr;
-    /* There is a bug in  2.4 kernels:
-     * if a decrementer exception is pending when it enables msr_ee,
-     * it's not ready to handle it...
-     */
-    env->decr = 0xFFFFFFFF;
-    p = (void *)(phys_ram_base + kernel_addr);
-#if !defined (USE_OPEN_FIRMWARE)
-    /* Let's register the whole memory available only in supervisor mode */
-    setup_BAT(env, 0, 0x00000000, 0x00000000, mem_size, 1, 0, 2);
-    /* Avoid open firmware init call (to get a console)
-     * This will make the kernel think we are a PREP machine...
-     */
-    put_long(p, 0xdeadc0de);
-    /* Build a real stack room */
-    p = (void *)(phys_ram_base + stack_addr);
-    put_long(p, stack_addr);
-    p -= 32;
-    env->gpr[1] -= 32;
-    /* Pretend there are no residual data */
-    env->gpr[3] = 0;
-#if 1
-    {
-        int size;
-        env->gpr[4] = 0x00800000;
-        size = load_initrd("initrd",
-                           (void *)((uint32_t)phys_ram_base + env->gpr[4]));
-        if (size < 0) {
-            /* No initrd */
-            env->gpr[4] = env->gpr[5] = 0;
-        } else {
-            env->gpr[5] = size;
-            boot_device = 'e';
-        }
-        printf("Initrd loaded at 0x%08x (%d)\n", env->gpr[4], env->gpr[5]);
-    }
-#else
-    env->gpr[4] = env->gpr[5] = 0;
-#endif
-    /* We have to put bootinfos after the BSS
-     * The BSS starts after the kernel end.
-     */
-#if 0
-    p = (void *)(((uint32_t)phys_ram_base + kernel_addr +
-                  kernel_size + (1 << 20) - 1) & ~((1 << 20) - 1));
-#else
-    p = (void *)((uint32_t)phys_ram_base + kernel_addr + 0x400000);
-#endif
-    if (loglevel > 0) {
-        fprintf(logfile, "bootinfos: %p 0x%08x\n",
-                p, (uint32_t)p - (uint32_t)phys_ram_base);
-    } else {
-        printf("bootinfos: %p 0x%08x\n",
-               p, (uint32_t)p - (uint32_t)phys_ram_base);
-    }
-    /* Command line: let's put it after bootinfos */
-#if 0
-    sprintf(p + 0x1000, "console=ttyS0,9600 root=%02x%02x mem=%dM",
-            boot_devs[boot_device - 'a'].major,
-            boot_devs[boot_device - 'a'].minor,
-            phys_ram_size >> 20);
-#else
-    sprintf(p + 0x1000, "console=ttyS0,9600 console=tty0 root=%s mem=%dM load_ramdisk=1",
-            boot_devs[boot_device - 'a'].name,
-            phys_ram_size >> 20);
-#endif
-    env->gpr[6] = (uint32_t)p + 0x1000 - (uint32_t)phys_ram_base;
-    env->gpr[7] = env->gpr[6] + strlen(p + 0x1000);
-    if (loglevel > 0) {
-        fprintf(logfile, "cmdline: %p 0x%08x [%s]\n",
-                p + 0x1000, env->gpr[6], p + 0x1000);
-    } else {
-        printf("cmdline: %p 0x%08x [%s]\n",
-               p + 0x1000, env->gpr[6], p + 0x1000);
-    }
-    /* BI_FIRST */
-    p = set_bootinfo_tag(p, 0x1010, 0, 0);
-    /* BI_CMD_LINE */
-    p = set_bootinfo_tag(p, 0x1012, env->gpr[7] - env->gpr[6],
-                         (void *)(env->gpr[6] + (uint32_t)phys_ram_base));
-    /* BI_MEM_SIZE */
-    tmp = (void *)tmpi;
-    tmp[0] = (phys_ram_size >> 24) & 0xFF;
-    tmp[1] = (phys_ram_size >> 16) & 0xFF;
-    tmp[2] = (phys_ram_size >> 8) & 0xFF;
-    tmp[3] = phys_ram_size & 0xFF;
-    p = set_bootinfo_tag(p, 0x1017, 4, tmpi);
-    /* BI_INITRD */
-    tmp[0] = (env->gpr[4] >> 24) & 0xFF;
-    tmp[1] = (env->gpr[4] >> 16) & 0xFF;
-    tmp[2] = (env->gpr[4] >> 8) & 0xFF;
-    tmp[3] = env->gpr[4] & 0xFF;
-    tmp[4] = (env->gpr[5] >> 24) & 0xFF;
-    tmp[5] = (env->gpr[5] >> 16) & 0xFF;
-    tmp[6] = (env->gpr[5] >> 8) & 0xFF;
-    tmp[7] = env->gpr[5] & 0xFF;
-    p = set_bootinfo_tag(p, 0x1014, 8, tmpi);
-    /* BI_LAST */
-    p = set_bootinfo_tag(p, 0x1011, 0, 0);
-#else
-    /* Set up MMU:
-     * kernel is loaded at kernel_addr and wants to be seen at 0x01000000
-     */
-    setup_BAT(env, 0, 0x01000000, kernel_addr, 0x00400000, 1, 0, 2);
-    {
-#if 0
-        uint32_t offset = 
-            *((uint32_t *)((uint32_t)phys_ram_base + kernel_addr));
-#else
-        uint32_t offset = 12;
-#endif
-        env->nip = 0x01000000 | (kernel_addr + offset);
-        printf("Start address: 0x%08x\n", env->nip);
-    }
-    env->gpr[1] = env->nip + (1 << 22);
-    p = (void *)(phys_ram_base + stack_addr);
-    put_long(p - 32, stack_addr);
-    env->gpr[1] -= 32;
-    printf("Kernel starts at 0x%08x stack 0x%08x\n", env->nip, env->gpr[1]);
-    /* We want all lower address not to be translated */
-    setup_BAT(env, 1, 0x00000000, 0x00000000, 0x010000000, 1, 1, 2);
-    /* We also need a BAT to access OF */
-    setup_BAT(env, 2, 0xFFFE0000, mem_size - 131072, 131072, 1, 0, 1);
-    /* Setup OF entry point */
-    {
-        char *p;
-        p = (char *)phys_ram_base + mem_size - 131072;
-        /* Special opcode to call OF */
-        *p++ = 0x18; *p++ = 0x00; *p++ = 0x00; *p++ = 0x02;
-        /* blr */
-        *p++ = 0x4E; *p++ = 0x80; *p++ = 0x00; *p++ = 0x20;
-    }
-    env->gpr[5] = 0xFFFE0000;
-    /* Register translations */
-    {
-        OF_transl_t translations[3] = {
-            { 0x01000000, 0x00400000, kernel_addr, 0x00000002, },
-            { 0x00000000, 0x01000000, 0x00000000, 0x00000002, },
-            { 0xFFFE0000, 0x00020000, mem_size - (128 * 1024),
-              0x00000001, },
-        };
-        OF_register_translations(3, translations);
-    }
-    /* Quite artificial, for now */
-    OF_register_bus("isa", "isa");
-    OF_register_serial("isa", "serial", 4, 0x3f8);
-    OF_register_stdio("serial", "serial");
-    /* Set up RTAS service */
-    RTAS_init();
-    /* Command line: let's put it just over the stack */
-#if 1
-    sprintf(p, "console=ttyS0,9600 root=%02x%02x mem=%dM",
-            boot_devs[boot_device - 'a'].major,
-            boot_devs[boot_device - 'a'].minor,
-            phys_ram_size >> 20);
-#else
-    sprintf(p, "console=ttyS0,9600 root=%s mem=%dM ne2000=0x300,9",
-            boot_devs[boot_device - 'a'].name,
-            phys_ram_size >> 20);
-#endif
-    OF_register_bootargs(p);
-#endif
-}
-
-void PPC_end_init (void)
-{
-    VGA_init();
-}
diff --git a/target-ppc/op.c b/target-ppc/op.c
index e47e245..12c9289 100644
--- a/target-ppc/op.c
+++ b/target-ppc/op.c
@@ -18,11 +18,11 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+//#define DEBUG_OP
+
 #include "config.h"
 #include "exec.h"
 
-//#define DEBUG_OP
-
 #define regs (env)
 #define Ts0 (int32_t)T0
 #define Ts1 (int32_t)T1
@@ -226,6 +226,17 @@ PPC_OP(process_exceptions)
     }
 }
 
+PPC_OP(debug)
+{
+    env->nip = PARAM(1);
+    env->brkstate = 1;
+#if defined (DEBUG_OP)
+    dump_state();
+#endif
+    do_queue_exception(EXCP_DEBUG);
+    RETURN();
+}
+
 /* Segment registers load and store with immediate index */
 PPC_OP(load_srin)
 {
@@ -1443,10 +1454,9 @@ PPC_OP(fneg)
 }
 
 /* Load and store */
-#if defined(CONFIG_USER_ONLY)
 #define MEMSUFFIX _raw
 #include "op_mem.h"
-#else
+#if !defined(CONFIG_USER_ONLY)
 #define MEMSUFFIX _user
 #include "op_mem.h"
 
@@ -1460,8 +1470,11 @@ PPC_OP(rfi)
     T0 = regs->spr[SRR1] & ~0xFFFF0000;
     do_store_msr();
     do_tlbia();
+#if defined (DEBUG_OP)
     dump_rfi();
+#endif
     regs->nip = regs->spr[SRR0] & ~0x00000003;
+    do_queue_exception(EXCP_RFI);
     if (env->exceptions != 0) {
         do_check_exception_state();
     }
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index 5bd138d..0bb48e7 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -20,10 +20,9 @@
 #include <math.h>
 #include "exec.h"
 
-#if defined(CONFIG_USER_ONLY)
 #define MEMSUFFIX _raw
 #include "op_helper_mem.h"
-#else
+#if !defined(CONFIG_USER_ONLY)
 #define MEMSUFFIX _user
 #include "op_helper_mem.h"
 #define MEMSUFFIX _kernel
@@ -122,8 +121,7 @@ void do_load_msr (void)
 void do_store_msr (void)
 {
     if (((T0 >> MSR_IR) & 0x01) != msr_ir ||
-        ((T0 >> MSR_DR) & 0x01) != msr_dr ||
-        ((T0 >> MSR_PR) & 0x01) != msr_pr) {
+        ((T0 >> MSR_DR) & 0x01) != msr_dr) {
         /* Flush all tlb when changing translation mode or privilege level */
         do_tlbia();
     }
@@ -371,44 +369,18 @@ void do_tlbie (void)
 
 /*****************************************************************************/
 /* Special helpers for debug */
+extern FILE *stdout;
+
+void dump_state (void)
+{
+    cpu_ppc_dump_state(env, stdout, 0);
+}
+
 void dump_rfi (void)
 {
 #if 0
-    printf("Return from interrupt\n");
-    printf("nip=0x%08x LR=0x%08x CTR=0x%08x MSR=0x%08x\n",
-           env->nip, env->lr, env->ctr,
-           (msr_pow << MSR_POW) | (msr_ile << MSR_ILE) | (msr_ee << MSR_EE) |
-           (msr_pr  << MSR_PR)  | (msr_fp  << MSR_FP)  | (msr_me << MSR_ME) |
-           (msr_fe0 << MSR_FE0) | (msr_se  << MSR_SE)  | (msr_be << MSR_BE) |
-           (msr_fe1 << MSR_FE1) | (msr_ip  << MSR_IP)  | (msr_ir << MSR_IR) |
-           (msr_dr  << MSR_DR)  | (msr_ri  << MSR_RI)  | (msr_le << MSR_LE));
-    {
-        int  i;
-        for (i = 0; i < 32; i++) {
-            if ((i & 7) == 0)
-                printf("GPR%02d:", i);
-            printf(" %08x", env->gpr[i]);
-            if ((i & 7) == 7)
-                printf("\n");
-        }
-        printf("CR: 0x");
-        for (i = 0; i < 8; i++)
-            printf("%01x", env->crf[i]);
-        printf("  [");
-        for (i = 0; i < 8; i++) {
-            char a = '-';
-            if (env->crf[i] & 0x08)
-                a = 'L';
-            else if (env->crf[i] & 0x04)
-                a = 'G';
-            else if (env->crf[i] & 0x02)
-                a = 'E';
-            printf(" %c%c", a, env->crf[i] & 0x01 ? 'O' : ' ');
-        }
-        printf(" ] ");
-    }
-    printf("TB: 0x%08x %08x\n", env->tb[1], env->tb[0]);
-    printf("SRR0 0x%08x SRR1 0x%08x\n", env->spr[SRR0], env->spr[SRR1]);
+    printf("Return from interrupt %d => 0x%08x\n", pos, env->nip);
+    //    cpu_ppc_dump_state(env, stdout, 0);
 #endif
 }
 
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 97a0d27..bd0dc67 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -2168,22 +2168,48 @@ GEN_HANDLER(mtspr, 0x1F, 0x13, 0x0E, 0x00000001, PPC_MISC)
 /* dcbf */
 GEN_HANDLER(dcbf, 0x1F, 0x16, 0x02, 0x03E00001, PPC_CACHE)
 {
+    if (rA(ctx->opcode) == 0) {
+        gen_op_load_gpr_T0(rB(ctx->opcode));
+    } else {
+        gen_op_load_gpr_T0(rA(ctx->opcode));
+        gen_op_load_gpr_T1(rB(ctx->opcode));
+        gen_op_add();
+    }
+    op_ldst(lbz);
 }
 
 /* dcbi (Supervisor only) */
 GEN_HANDLER(dcbi, 0x1F, 0x16, 0x0E, 0x03E00001, PPC_CACHE)
 {
-#if !defined(CONFIG_USER_ONLY)
-    if (!ctx->supervisor)
-#endif
-    {
+#if defined(CONFIG_USER_ONLY)
+    RET_PRIVOPC();
+#else
+    if (!ctx->supervisor) {
         RET_PRIVOPC();
     }
+    if (rA(ctx->opcode) == 0) {
+        gen_op_load_gpr_T0(rB(ctx->opcode));
+    } else {
+        gen_op_load_gpr_T0(rA(ctx->opcode));
+        gen_op_load_gpr_T1(rB(ctx->opcode));
+        gen_op_add();
+    }
+    op_ldst(lbz);
+    op_ldst(stb);
+#endif
 }
 
 /* dcdst */
 GEN_HANDLER(dcbst, 0x1F, 0x16, 0x01, 0x03E00001, PPC_CACHE)
 {
+    if (rA(ctx->opcode) == 0) {
+        gen_op_load_gpr_T0(rB(ctx->opcode));
+    } else {
+        gen_op_load_gpr_T0(rA(ctx->opcode));
+        gen_op_load_gpr_T1(rB(ctx->opcode));
+        gen_op_add();
+    }
+    op_ldst(lbz);
 }
 
 /* dcbt */
@@ -2863,7 +2889,7 @@ void cpu_ppc_dump_state(CPUPPCState *env, FILE *f, int flags)
 
     fprintf(f, "nip=0x%08x LR=0x%08x CTR=0x%08x XER=0x%08x "
             "MSR=0x%08x\n", env->nip, env->lr, env->ctr,
-            _load_xer(), _load_msr());
+            _load_xer(env), _load_msr(env));
         for (i = 0; i < 32; i++) {
             if ((i & 7) == 0)
             fprintf(f, "GPR%02d:", i);
@@ -2894,8 +2920,8 @@ void cpu_ppc_dump_state(CPUPPCState *env, FILE *f, int flags)
             if ((i & 3) == 3)
             fprintf(f, "\n");
     }
-    fprintf(f, "SRR0 0x%08x SRR1 0x%08x\n",
-            env->spr[SRR0], env->spr[SRR1]);
+    fprintf(f, "SRR0 0x%08x SRR1 0x%08x DECR=0x%08x excp:0x%08x\n",
+            env->spr[SRR0], env->spr[SRR1], env->decr, env->exceptions);
     fprintf(f, "reservation 0x%08x\n", env->reserve);
     fflush(f);
 }
@@ -2934,6 +2960,7 @@ CPUPPCState *cpu_ppc_init(void)
 #if defined(CONFIG_USER_ONLY)
     msr_pr = 1;
 #endif
+    env->access_type = ACCESS_INT;
 
     return env;
 }
@@ -2977,6 +3004,7 @@ int gen_intermediate_code_internal (CPUState *env, TranslationBlock *tb,
     /* Single step trace mode */
     msr_se = 1;
 #endif
+    env->access_type = ACCESS_CODE;
     /* Set env in case of segfault during code fetch */
     while (ctx.exception == EXCP_NONE && gen_opc_ptr < gen_opc_end) {
         if (search_pc) {
@@ -3073,9 +3101,8 @@ int gen_intermediate_code_internal (CPUState *env, TranslationBlock *tb,
                 ctx.exception = EXCP_TRACE;
     }
         }
-        /* if too long translation, stop generation too */
-        if (gen_opc_ptr >= gen_opc_end ||
-            ((uint32_t)ctx.nip - pc_start) >= (TARGET_PAGE_SIZE - 32)) {
+        /* if we reach a page boundary, stop generation */
+        if (((uint32_t)ctx.nip & (TARGET_PAGE_SIZE - 1)) == 0) {
             if (ctx.exception == EXCP_NONE) {
         gen_op_b((long)ctx.tb, (uint32_t)ctx.nip);
                 ctx.exception = EXCP_BRANCH;
@@ -3111,6 +3138,7 @@ int gen_intermediate_code_internal (CPUState *env, TranslationBlock *tb,
     } else {
         tb->size = (uint32_t)ctx.nip - pc_start;
     }
+    env->access_type = ACCESS_INT;
 #ifdef DEBUG_DISAS
     if (loglevel > 0) {
         fprintf(logfile, "---------------- excp: %04x\n", ctx.exception);