Implement the PowerPC alternate time-base, following the 2.04 specification.

Share most code with the time-base management routines.
Remove time-base write routines from user-mode emulation environments.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3277 c046a42c-6fe2-441c-8c8c-71466251a162

6 files changed, 134 insertions, 57 deletions

diff --git a/darwin-user/main.c b/darwin-user/main.c
index affd874..45495ed 100644
--- a/darwin-user/main.c
+++ b/darwin-user/main.c
@@ -124,24 +124,14 @@ uint32_t cpu_ppc_load_tbu (CPUState *env)
     return cpu_ppc_get_tb(env) >> 32;
 }
 
-static void cpu_ppc_store_tb (CPUState *env, uint64_t value)
+uint32_t cpu_ppc_load_atbl (CPUState *env)
 {
-    /* TO FIX */
-}
-
-void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
-{
-    cpu_ppc_store_tb(env, ((uint64_t)value << 32) | cpu_ppc_load_tbl(env));
-}
-
-void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
-{
-    cpu_ppc_store_tb(env, ((uint64_t)cpu_ppc_load_tbl(env) << 32) | value);
+    return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
 }
 
-void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value)
+uint32_t cpu_ppc_load_atbu (CPUState *env)
 {
-    cpu_ppc_store_tbu( env, value );
+    return cpu_ppc_get_tb(env) >> 32;
 }
 
 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
diff --git a/hw/ppc.c b/hw/ppc.c
index 20ee532..270097b 100644
--- a/hw/ppc.c
+++ b/hw/ppc.c
@@ -408,6 +408,7 @@ void ppc405_irq_init (CPUState *env)
 struct ppc_tb_t {
     /* Time base management */
     int64_t  tb_offset;    /* Compensation               */
+    int64_t  atb_offset;   /* Compensation               */
     uint32_t tb_freq;      /* TB frequency               */
     /* Decrementer management */
     uint64_t decr_next;    /* Tick for next decr interrupt  */
@@ -422,7 +423,7 @@ struct ppc_tb_t {
     void *opaque;
 };
 
-static inline uint64_t cpu_ppc_get_tb (ppc_tb_t *tb_env)
+static inline uint64_t cpu_ppc_get_tb (ppc_tb_t *tb_env, int64_t tb_offset)
 {
     /* TB time in tb periods */
     return muldiv64(qemu_get_clock(vm_clock) + tb_env->tb_offset,
@@ -434,19 +435,10 @@ uint32_t cpu_ppc_load_tbl (CPUState *env)
     ppc_tb_t *tb_env = env->tb_env;
     uint64_t tb;
 
-    tb = cpu_ppc_get_tb(tb_env);
-#ifdef PPC_DEBUG_TB
-    {
-        static int last_time;
-        int now;
-        now = time(NULL);
-        if (last_time != now) {
-            last_time = now;
-            if (loglevel != 0) {
-                fprintf(logfile, "%s: tb=0x%016lx %d %08lx\n",
-                        __func__, tb, now, tb_env->tb_offset);
-            }
-        }
+    tb = cpu_ppc_get_tb(tb_env, tb_env->tb_offset);
+#if defined(PPC_DEBUG_TB)
+    if (loglevel != 0) {
+        fprintf(logfile, "%s: tb=0x%016lx\n", __func__, tb);
     }
 #endif
 
@@ -458,7 +450,7 @@ uint32_t cpu_ppc_load_tbu (CPUState *env)
     ppc_tb_t *tb_env = env->tb_env;
     uint64_t tb;
 
-    tb = cpu_ppc_get_tb(tb_env);
+    tb = cpu_ppc_get_tb(tb_env, tb_env->tb_offset);
 #if defined(PPC_DEBUG_TB)
     if (loglevel != 0) {
         fprintf(logfile, "%s: tb=0x%016lx\n", __func__, tb);
@@ -468,32 +460,89 @@ uint32_t cpu_ppc_load_tbu (CPUState *env)
     return tb >> 32;
 }
 
-static void cpu_ppc_store_tb (ppc_tb_t *tb_env, uint64_t value)
+static inline void cpu_ppc_store_tb (ppc_tb_t *tb_env, int64_t *tb_offsetp,
+                                     uint64_t value)
 {
-    tb_env->tb_offset = muldiv64(value, ticks_per_sec, tb_env->tb_freq)
+    *tb_offsetp = muldiv64(value, ticks_per_sec, tb_env->tb_freq)
         - qemu_get_clock(vm_clock);
 #ifdef PPC_DEBUG_TB
     if (loglevel != 0) {
         fprintf(logfile, "%s: tb=0x%016lx offset=%08lx\n", __func__, value,
-                tb_env->tb_offset);
+                *tb_offsetp);
     }
 #endif
 }
 
+void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
+{
+    ppc_tb_t *tb_env = env->tb_env;
+    uint64_t tb;
+
+    tb = cpu_ppc_get_tb(tb_env, tb_env->tb_offset);
+    tb &= 0xFFFFFFFF00000000ULL;
+    cpu_ppc_store_tb(tb_env, &tb_env->tb_offset, tb | (uint64_t)value);
+}
+
 void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
 {
     ppc_tb_t *tb_env = env->tb_env;
+    uint64_t tb;
 
-    cpu_ppc_store_tb(tb_env,
-                     ((uint64_t)value << 32) | cpu_ppc_load_tbl(env));
+    tb = cpu_ppc_get_tb(tb_env, tb_env->tb_offset);
+    tb &= 0x00000000FFFFFFFFULL;
+    cpu_ppc_store_tb(tb_env, &tb_env->tb_offset,
+                     ((uint64_t)value << 32) | tb);
 }
 
-void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
+uint32_t cpu_ppc_load_atbl (CPUState *env)
+{
+    ppc_tb_t *tb_env = env->tb_env;
+    uint64_t tb;
+
+    tb = cpu_ppc_get_tb(tb_env, tb_env->atb_offset);
+#if defined(PPC_DEBUG_TB)
+    if (loglevel != 0) {
+        fprintf(logfile, "%s: tb=0x%016lx\n", __func__, tb);
+    }
+#endif
+
+    return tb & 0xFFFFFFFF;
+}
+
+uint32_t cpu_ppc_load_atbu (CPUState *env)
+{
+    ppc_tb_t *tb_env = env->tb_env;
+    uint64_t tb;
+
+    tb = cpu_ppc_get_tb(tb_env, tb_env->atb_offset);
+#if defined(PPC_DEBUG_TB)
+    if (loglevel != 0) {
+        fprintf(logfile, "%s: tb=0x%016lx\n", __func__, tb);
+    }
+#endif
+
+    return tb >> 32;
+}
+
+void cpu_ppc_store_atbl (CPUState *env, uint32_t value)
+{
+    ppc_tb_t *tb_env = env->tb_env;
+    uint64_t tb;
+
+    tb = cpu_ppc_get_tb(tb_env, tb_env->atb_offset);
+    tb &= 0xFFFFFFFF00000000ULL;
+    cpu_ppc_store_tb(tb_env, &tb_env->atb_offset, tb | (uint64_t)value);
+}
+
+void cpu_ppc_store_atbu (CPUState *env, uint32_t value)
 {
     ppc_tb_t *tb_env = env->tb_env;
+    uint64_t tb;
 
-    cpu_ppc_store_tb(tb_env,
-                     ((uint64_t)cpu_ppc_load_tbu(env) << 32) | value);
+    tb = cpu_ppc_get_tb(tb_env, tb_env->atb_offset);
+    tb &= 0x00000000FFFFFFFFULL;
+    cpu_ppc_store_tb(tb_env, &tb_env->atb_offset,
+                     ((uint64_t)value << 32) | tb);
 }
 
 static inline uint32_t _cpu_ppc_load_decr (CPUState *env, uint64_t *next)
diff --git a/linux-user/main.c b/linux-user/main.c
index fb424ad..a06a706 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -664,7 +664,6 @@ void cpu_loop (CPUSPARCState *env)
 #endif
 
 #ifdef TARGET_PPC
-
 static inline uint64_t cpu_ppc_get_tb (CPUState *env)
 {
     /* TO FIX */
@@ -681,32 +680,19 @@ uint32_t cpu_ppc_load_tbu (CPUState *env)
     return cpu_ppc_get_tb(env) >> 32;
 }
 
-static void cpu_ppc_store_tb (CPUState *env, uint64_t value)
-{
-    /* TO FIX */
-}
-
-void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
+uint32_t cpu_ppc_load_atbl (CPUState *env)
 {
-    cpu_ppc_store_tb(env, ((uint64_t)value << 32) | cpu_ppc_load_tbl(env));
+    return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
 }
 
-void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
+uint32_t cpu_ppc_load_atbu (CPUState *env)
 {
-    cpu_ppc_store_tb(env, ((uint64_t)cpu_ppc_load_tbl(env) << 32) | value);
+    return cpu_ppc_get_tb(env) >> 32;
 }
 
-void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value)
-__attribute__ (( alias ("cpu_ppc_store_tbu") ));
-
 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
 __attribute__ (( alias ("cpu_ppc_load_tbu") ));
 
-void cpu_ppc601_store_rtcl (CPUState *env, uint32_t value)
-{
-    cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
-}
-
 uint32_t cpu_ppc601_load_rtcl (CPUState *env)
 {
     return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 21c3061..e4d1216 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -625,6 +625,10 @@ uint32_t cpu_ppc_load_tbl (CPUPPCState *env);
 uint32_t cpu_ppc_load_tbu (CPUPPCState *env);
 void cpu_ppc_store_tbu (CPUPPCState *env, uint32_t value);
 void cpu_ppc_store_tbl (CPUPPCState *env, uint32_t value);
+uint32_t cpu_ppc_load_atbl (CPUPPCState *env);
+uint32_t cpu_ppc_load_atbu (CPUPPCState *env);
+void cpu_ppc_store_atbl (CPUPPCState *env, uint32_t value);
+void cpu_ppc_store_atbu (CPUPPCState *env, uint32_t value);
 uint32_t cpu_ppc_load_decr (CPUPPCState *env);
 void cpu_ppc_store_decr (CPUPPCState *env, uint32_t value);
 #if defined(TARGET_PPC64H)
@@ -798,8 +802,8 @@ int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val);
 #define SPR_BOOKE_SPEFSCR (0x200)
 #define SPR_E500_BBEAR   (0x201)
 #define SPR_E500_BBTAR   (0x202)
-#define SPR_BOOKE_ATBL   (0x20E)
-#define SPR_BOOKE_ATBU   (0x20F)
+#define SPR_ATBL         (0x20E)
+#define SPR_ATBU         (0x20F)
 #define SPR_IBAT0U       (0x210)
 #define SPR_BOOKE_IVOR32 (0x210)
 #define SPR_IBAT0L       (0x211)
diff --git a/target-ppc/op.c b/target-ppc/op.c
index 976eb53..4622534 100644
--- a/target-ppc/op.c
+++ b/target-ppc/op.c
@@ -423,6 +423,18 @@ void OPPROTO op_load_tbu (void)
     RETURN();
 }
 
+void OPPROTO op_load_atbl (void)
+{
+    T0 = cpu_ppc_load_atbl(env);
+    RETURN();
+}
+
+void OPPROTO op_load_atbu (void)
+{
+    T0 = cpu_ppc_load_atbu(env);
+    RETURN();
+}
+
 #if !defined(CONFIG_USER_ONLY)
 void OPPROTO op_store_tbl (void)
 {
@@ -436,6 +448,18 @@ void OPPROTO op_store_tbu (void)
     RETURN();
 }
 
+void OPPROTO op_store_atbl (void)
+{
+    cpu_ppc_store_atbl(env, T0);
+    RETURN();
+}
+
+void OPPROTO op_store_atbu (void)
+{
+    cpu_ppc_store_atbu(env, T0);
+    RETURN();
+}
+
 void OPPROTO op_load_decr (void)
 {
     T0 = cpu_ppc_load_decr(env);
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 53a6abf..285e351 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -162,6 +162,18 @@ static void spr_read_tbu (void *opaque, int sprn)
     gen_op_load_tbu();
 }
 
+__attribute__ (( unused ))
+static void spr_read_atbl (void *opaque, int sprn)
+{
+    gen_op_load_atbl();
+}
+
+__attribute__ (( unused ))
+static void spr_read_atbu (void *opaque, int sprn)
+{
+    gen_op_load_atbu();
+}
+
 #if !defined(CONFIG_USER_ONLY)
 static void spr_write_tbl (void *opaque, int sprn)
 {
@@ -172,6 +184,18 @@ static void spr_write_tbu (void *opaque, int sprn)
 {
     gen_op_store_tbu();
 }
+
+__attribute__ (( unused ))
+static void spr_write_atbl (void *opaque, int sprn)
+{
+    gen_op_store_atbl();
+}
+
+__attribute__ (( unused ))
+static void spr_write_atbu (void *opaque, int sprn)
+{
+    gen_op_store_atbu();
+}
 #endif
 
 #if !defined(CONFIG_USER_ONLY)