From 1d0a48fb920cdd038aa1238740032e27aa460677 Mon Sep 17 00:00:00 2001
From: j_mayer <j_mayer@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Sat, 31 Mar 2007 11:10:49 +0000
Subject: [PATCH] As embedded PowerPC TLB model is very different from PowerPC
 6xx ones, define ppc_tlb_t as an union of the two.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2553 c046a42c-6fe2-441c-8c8c-71466251a162
---
 target-ppc/cpu.h    | 20 +++++++++++++++++---
 target-ppc/helper.c | 20 +++++++++-----------
 2 files changed, 26 insertions(+), 14 deletions(-)

diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 8d2c3a9562..7204abe028 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -528,7 +528,7 @@ typedef struct ppc_tb_t ppc_tb_t;
 typedef struct ppc_spr_t ppc_spr_t;
 typedef struct ppc_dcr_t ppc_dcr_t;
 typedef struct ppc_avr_t ppc_avr_t;
-typedef struct ppc_tlb_t ppc_tlb_t;
+typedef union ppc_tlb_t ppc_tlb_t;
 
 /* SPR access micro-ops generations callbacks */
 struct ppc_spr_t {
@@ -547,12 +547,26 @@ struct ppc_avr_t {
 };
 
 /* Software TLB cache */
-struct ppc_tlb_t {
+typedef struct ppc6xx_tlb_t ppc6xx_tlb_t;
+struct ppc6xx_tlb_t {
     target_ulong pte0;
     target_ulong pte1;
     target_ulong EPN;
+};
+
+typedef struct ppcemb_tlb_t ppcemb_tlb_t;
+struct ppcemb_tlb_t {
+    target_ulong RPN;
+    target_ulong EPN;
     target_ulong PID;
     int size;
+    int prot;
+    int attr; /* Storage attributes */
+};
+
+union ppc_tlb_t {
+    ppc6xx_tlb_t tlb6;
+    ppcemb_tlb_t tlbe;
 };
 
 /*****************************************************************************/
@@ -729,7 +743,7 @@ struct CPUPPCState {
     int nb_pids;     /* Number of available PID registers                    */
     ppc_tlb_t *tlb;  /* TLB is optional. Allocate them only if needed        */
     /* Callbacks for specific checks on some implementations */
-    int (*tlb_check_more)(CPUPPCState *env, struct ppc_tlb_t *tlb, int *prot,
+    int (*tlb_check_more)(CPUPPCState *env, ppc_tlb_t *tlb, int *prot,
                           target_ulong vaddr, int rw, int acc_type,
                           int is_user);
     /* 403 dedicated access protection registers */
diff --git a/target-ppc/helper.c b/target-ppc/helper.c
index 4356edc36c..c835b1efe8 100644
--- a/target-ppc/helper.c
+++ b/target-ppc/helper.c
@@ -186,7 +186,7 @@ static int ppc6xx_tlb_getnum (CPUState *env, target_ulong eaddr,
 
 void ppc6xx_tlb_invalidate_all (CPUState *env)
 {
-    ppc_tlb_t *tlb;
+    ppc6xx_tlb_t *tlb;
     int nr, max;
 
 #if defined (DEBUG_SOFTWARE_TLB) && 0
@@ -199,7 +199,7 @@ void ppc6xx_tlb_invalidate_all (CPUState *env)
     if (env->id_tlbs == 1)
         max *= 2;
     for (nr = 0; nr < max; nr++) {
-        tlb = &env->tlb[nr];
+        tlb = &env->tlb[nr].tlb6;
 #if !defined(FLUSH_ALL_TLBS)
         tlb_flush_page(env, tlb->EPN);
 #endif
@@ -214,14 +214,14 @@ static inline void __ppc6xx_tlb_invalidate_virt (CPUState *env,
                                                  target_ulong eaddr,
                                                  int is_code, int match_epn)
 {
-    ppc_tlb_t *tlb;
+    ppc6xx_tlb_t *tlb;
     int way, nr;
 
 #if !defined(FLUSH_ALL_TLBS)
     /* Invalidate ITLB + DTLB, all ways */
     for (way = 0; way < env->nb_ways; way++) {
         nr = ppc6xx_tlb_getnum(env, eaddr, way, is_code);
-        tlb = &env->tlb[nr];
+        tlb = &env->tlb[nr].tlb6;
         if (pte_is_valid(tlb->pte0) && (match_epn == 0 || eaddr == tlb->EPN)) {
 #if defined (DEBUG_SOFTWARE_TLB)
             if (loglevel != 0) {
@@ -248,11 +248,11 @@ void ppc6xx_tlb_invalidate_virt (CPUState *env, target_ulong eaddr,
 void ppc6xx_tlb_store (CPUState *env, target_ulong EPN, int way, int is_code,
                        target_ulong pte0, target_ulong pte1)
 {
-    ppc_tlb_t *tlb;
+    ppc6xx_tlb_t *tlb;
     int nr;
 
     nr = ppc6xx_tlb_getnum(env, EPN, way, is_code);
-    tlb = &env->tlb[nr];
+    tlb = &env->tlb[nr].tlb6;
 #if defined (DEBUG_SOFTWARE_TLB)
     if (loglevel != 0) {
         fprintf(logfile, "Set TLB %d/%d EPN " ADDRX " PTE0 " ADDRX 
@@ -264,8 +264,6 @@ void ppc6xx_tlb_store (CPUState *env, target_ulong EPN, int way, int is_code,
     tlb->pte0 = pte0;
     tlb->pte1 = pte1;
     tlb->EPN = EPN;
-    tlb->PID = 0;
-    tlb->size = 1;
     /* Store last way for LRU mechanism */
     env->last_way = way;
 }
@@ -273,7 +271,7 @@ void ppc6xx_tlb_store (CPUState *env, target_ulong EPN, int way, int is_code,
 static int ppc6xx_tlb_check (CPUState *env, mmu_ctx_t *ctx,
                              target_ulong eaddr, int rw, int access_type)
 {
-    ppc_tlb_t *tlb;
+    ppc6xx_tlb_t *tlb;
     int nr, best, way;
     int ret;
 
@@ -282,7 +280,7 @@ static int ppc6xx_tlb_check (CPUState *env, mmu_ctx_t *ctx,
     for (way = 0; way < env->nb_ways; way++) {
         nr = ppc6xx_tlb_getnum(env, eaddr, way,
                                access_type == ACCESS_CODE ? 1 : 0);
-        tlb = &env->tlb[nr];
+        tlb = &env->tlb[nr].tlb6;
         /* This test "emulates" the PTE index match for hardware TLBs */
         if ((eaddr & TARGET_PAGE_MASK) != tlb->EPN) {
 #if defined (DEBUG_SOFTWARE_TLB)
@@ -339,7 +337,7 @@ static int ppc6xx_tlb_check (CPUState *env, mmu_ctx_t *ctx,
         }
 #endif
         /* Update page flags */
-        pte_update_flags(ctx, &env->tlb[best].pte1, ret, rw);
+        pte_update_flags(ctx, &env->tlb[best].tlb6.pte1, ret, rw);
     }
 
     return ret;