Replace is_user variable with mmu_idx in softmmu core,

  allowing support of more than 2 mmu access modes.
Add backward compatibility is_user variable in targets code when needed.
Implement per target cpu_mmu_index function, avoiding duplicated code
  and #ifdef TARGET_xxx in softmmu core functions.
Implement per target mmu modes definitions. As an example, add PowerPC
  hypervisor mode definition and Alpha executive and kernel modes definitions.
Optimize PowerPC case, precomputing mmu_idx when MSR register changes
  and using the same definition in code translation code.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3384 c046a42c-6fe2-441c-8c8c-71466251a162

6 files changed, 23 insertions, 10 deletions

diff --git a/target-cris/cpu.h b/target-cris/cpu.h
index 11652c5..ef0953b 100644
--- a/target-cris/cpu.h
+++ b/target-cris/cpu.h
@@ -74,6 +74,8 @@
 /* Internal flags for the implementation.  */
 #define F_DELAYSLOT 1
 
+#define NB_MMU_MODES 2
+
 typedef struct CPUCRISState {
 	uint32_t debug1;
 	uint32_t debug2;
@@ -229,6 +231,16 @@ void register_cris_insns (CPUCRISState *env);
 #define cpu_gen_code cpu_cris_gen_code
 #define cpu_signal_handler cpu_cris_signal_handler
 
+/* MMU modes definitions */
+#define MMU_MODE0_SUFFIX _kernel
+#define MMU_MODE1_SUFFIX _user
+#define MMU_USER_IDX 1
+/* CRIS FIXME: I guess we want to validate supervisor mode acceses here.  */
+static inline int cpu_mmu_index (CPUState *env)
+{
+    return 0;
+}
+
 #include "cpu-all.h"
 
 /* Register aliases.  */
diff --git a/target-cris/exec.h b/target-cris/exec.h
index a4f555e..fe63f16 100644
--- a/target-cris/exec.h
+++ b/target-cris/exec.h
@@ -45,8 +45,8 @@ static inline void regs_to_env(void)
 }
 
 int cpu_cris_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
-                              int is_user, int is_softmmu);
-void tlb_fill (target_ulong addr, int is_write, int is_user, void *retaddr);
+                              int mmu_idx, int is_softmmu);
+void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr);
 
 #if !defined(CONFIG_USER_ONLY)
 #include "softmmu_exec.h"
diff --git a/target-cris/helper.c b/target-cris/helper.c
index 3db3bea..9830560 100644
--- a/target-cris/helper.c
+++ b/target-cris/helper.c
@@ -35,7 +35,7 @@ void do_interrupt (CPUState *env)
 }
 
 int cpu_cris_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
-                             int is_user, int is_softmmu)
+                             int mmu_idx, int is_softmmu)
 {
     env->exception_index = 0xaa;
     env->debug1 = address;
@@ -52,7 +52,7 @@ target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
 #else /* !CONFIG_USER_ONLY */
 
 int cpu_cris_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
-                               int is_user, int is_softmmu)
+                               int mmu_idx, int is_softmmu)
 {
 	struct cris_mmu_result_t res;
 	int prot, miss;
@@ -61,7 +61,7 @@ int cpu_cris_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
 	address &= TARGET_PAGE_MASK;
 	prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
 //	printf ("%s pc=%x %x w=%d smmu=%d\n", __func__, env->pc, address, rw, is_softmmu);
-	miss = cris_mmu_translate(&res, env, address, rw, is_user);
+	miss = cris_mmu_translate(&res, env, address, rw, mmu_idx);
 	if (miss)
 	{
 		/* handle the miss.  */
@@ -73,7 +73,7 @@ int cpu_cris_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
 		phy = res.phy;
 	}
 //	printf ("a=%x phy=%x\n", address, phy);
-	return tlb_set_page(env, address, phy, prot, is_user, is_softmmu);
+	return tlb_set_page(env, address, phy, prot, mmu_idx, is_softmmu);
 }
 
 
diff --git a/target-cris/mmu.c b/target-cris/mmu.c
index 56299b7..2be4eb8 100644
--- a/target-cris/mmu.c
+++ b/target-cris/mmu.c
@@ -111,11 +111,12 @@ static int cris_mmu_translate_page(struct cris_mmu_result_t *res,
 
 int cris_mmu_translate(struct cris_mmu_result_t *res,
 		       CPUState *env, uint32_t vaddr,
-		       int rw, int is_user)
+		       int rw, int mmu_idx)
 {
 	uint32_t phy = vaddr;
 	int seg;
 	int miss = 0;
+        int is_user = mmu_idx == MMU_USER_IDX;
 
 	if (!cris_mmu_enabled(env->sregs[SFR_RW_GC_CFG])) {
 		res->phy = vaddr;
diff --git a/target-cris/mmu.h b/target-cris/mmu.h
index adbc1fc..519c0fc 100644
--- a/target-cris/mmu.h
+++ b/target-cris/mmu.h
@@ -17,4 +17,4 @@ struct cris_mmu_result_t
 
 int cris_mmu_translate(struct cris_mmu_result_t *res,
 		       CPUState *env, uint32_t vaddr,
-		       int rw, int is_user);
+		       int rw, int mmu_idx);
diff --git a/target-cris/op_helper.c b/target-cris/op_helper.c
index f84ceb9..4f0f07c 100644
--- a/target-cris/op_helper.c
+++ b/target-cris/op_helper.c
@@ -41,7 +41,7 @@
    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 (target_ulong addr, int is_write, int is_user, void *retaddr)
+void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
 {
     TranslationBlock *tb;
     CPUState *saved_env;
@@ -52,7 +52,7 @@ void tlb_fill (target_ulong addr, int is_write, int is_user, void *retaddr)
        generated code */
     saved_env = env;
     env = cpu_single_env;
-    ret = cpu_cris_handle_mmu_fault(env, addr, is_write, is_user, 1);
+    ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
     if (__builtin_expect(ret, 0)) {
         if (retaddr) {
             /* now we have a real cpu fault */