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

1 files changed, 13 insertions, 0 deletions

diff --git a/target-alpha/cpu.h b/target-alpha/cpu.h
index 3f517e6..579ce61 100644
--- a/target-alpha/cpu.h
+++ b/target-alpha/cpu.h
@@ -256,6 +256,8 @@ struct pal_handler_t {
     void (*call_pal)(CPUAlphaState *env, uint32_t palcode);
 };
 
+#define NB_MMU_MODES 4
+
 struct CPUAlphaState {
     uint64_t ir[31];
     float64  fir[31];
@@ -302,6 +304,17 @@ struct CPUAlphaState {
 #define cpu_gen_code cpu_alpha_gen_code
 #define cpu_signal_handler cpu_alpha_signal_handler
 
+/* MMU modes definitions */
+#define MMU_MODE0_SUFFIX _kernel
+#define MMU_MODE1_SUFFIX _executive
+#define MMU_MODE2_SUFFIX _supervisor
+#define MMU_MODE3_SUFFIX _user
+#define MMU_USER_IDX 3
+static inline int cpu_mmu_index (CPUState *env)
+{
+    return (env->ps >> 3) & 3;
+}
+
 #include "cpu-all.h"
 
 enum {