[Qemu-devel] [PATCH v3 03/15] target-mips: distinguish between data load and instruction fetch

[Leon Alrae <leon.alrae@imgtec.com>]

Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
---
 target-mips/helper.c | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/target-mips/helper.c b/target-mips/helper.c
index fe16820..1c9e69d 100644
--- a/target-mips/helper.c
+++ b/target-mips/helper.c
@@ -87,7 +87,7 @@ int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
             /* Check access rights */
             if (!(n ? tlb->V1 : tlb->V0))
                 return TLBRET_INVALID;
-            if (rw == 0 || (n ? tlb->D1 : tlb->D0)) {
+            if (rw != MMU_DATA_STORE || (n ? tlb->D1 : tlb->D0)) {
                 *physical = tlb->PFN[n] | (address & (mask >> 1));
                 *prot = PAGE_READ;
                 if (n ? tlb->D1 : tlb->D0)
@@ -237,25 +237,28 @@ static void raise_mmu_exception(CPUMIPSState *env, target_ulong address,
     case TLBRET_BADADDR:
         /* Reference to kernel address from user mode or supervisor mode */
         /* Reference to supervisor address from user mode */
-        if (rw)
+        if (rw == MMU_DATA_STORE) {
             exception = EXCP_AdES;
-        else
+        } else {
             exception = EXCP_AdEL;
+        }
         break;
     case TLBRET_NOMATCH:
         /* No TLB match for a mapped address */
-        if (rw)
+        if (rw == MMU_DATA_STORE) {
             exception = EXCP_TLBS;
-        else
+        } else {
             exception = EXCP_TLBL;
+        }
         error_code = 1;
         break;
     case TLBRET_INVALID:
         /* TLB match with no valid bit */
-        if (rw)
+        if (rw == MMU_DATA_STORE) {
             exception = EXCP_TLBS;
-        else
+        } else {
             exception = EXCP_TLBL;
+        }
         break;
     case TLBRET_DIRTY:
         /* TLB match but 'D' bit is cleared */
@@ -312,8 +315,6 @@ int mips_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
     qemu_log("%s pc " TARGET_FMT_lx " ad %" VADDR_PRIx " rw %d mmu_idx %d\n",
               __func__, env->active_tc.PC, address, rw, mmu_idx);
 
-    rw &= 1;
-
     /* data access */
 #if !defined(CONFIG_USER_ONLY)
     /* XXX: put correct access by using cpu_restore_state()
@@ -347,8 +348,6 @@ hwaddr cpu_mips_translate_address(CPUMIPSState *env, target_ulong address, int r
     int access_type;
     int ret = 0;
 
-    rw &= 1;
-
     /* data access */
     access_type = ACCESS_INT;
     ret = get_physical_address(env, &physical, &prot,
-- 
2.1.0