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, 11 insertions, 0 deletions

diff --git a/target-m68k/cpu.h b/target-m68k/cpu.h
index a34c137..5004a91 100644
--- a/target-m68k/cpu.h
+++ b/target-m68k/cpu.h
@@ -53,6 +53,8 @@
 #define EXCP_RTE            0x100
 #define EXCP_HALT_INSN      0x101
 
+#define NB_MMU_MODES 2
+
 typedef struct CPUM68KState {
     uint32_t dregs[8];
     uint32_t aregs[8];
@@ -223,6 +225,15 @@ void register_m68k_insns (CPUM68KState *env);
 #define cpu_gen_code cpu_m68k_gen_code
 #define cpu_signal_handler cpu_m68k_signal_handler
 
+/* MMU modes definitions */
+#define MMU_MODE0_SUFFIX _kernel
+#define MMU_MODE1_SUFFIX _user
+#define MMU_USER_IDX 1
+static inline int cpu_mmu_index (CPUState *env)
+{
+    return (env->sr & SR_S) == 0 ? 1 : 0;
+}
+
 #include "cpu-all.h"
 
 #endif