[v5,04/12] target-mips: get_physical_address: Add defines for segment bases

Commit Message

James Hogan June 17, 2014, 10:10 p.m. UTC

Add preprocessor definitions for 32bit segment bases for use in
get_physical_address(). These will also be taken advantage of in the
next patch which adds KVM awareness.

Signed-off-by: James Hogan <[e-mail]>
Reviewed-by: Aurelien Jarno <[e-mail]>
---
 target-mips/helper.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

Patch

diff --git a/target-mips/helper.c b/target-mips/helper.c
index 064622cc31ba..caacd762fd90 100644
--- a/target-mips/helper.c
+++ b/target-mips/helper.c
@@ -118,7 +118,13 @@  static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
     qemu_log("user mode %d h %08x\n", user_mode, env->hflags);
 #endif
 
-    if (address <= (int32_t)0x7FFFFFFFUL) {
+#define USEG_LIMIT      0x7FFFFFFFUL
+#define KSEG0_BASE      0x80000000UL
+#define KSEG1_BASE      0xA0000000UL
+#define KSEG2_BASE      0xC0000000UL
+#define KSEG3_BASE      0xE0000000UL
+
+    if (address <= USEG_LIMIT) {
         /* useg */
         if (env->CP0_Status & (1 << CP0St_ERL)) {
             *physical = address & 0xFFFFFFFF;
@@ -160,23 +166,23 @@  static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
             ret = TLBRET_BADADDR;
         }
 #endif
-    } else if (address < (int32_t)0xA0000000UL) {
+    } else if (address < (int32_t)KSEG1_BASE) {
         /* kseg0 */
         if (kernel_mode) {
-            *physical = address - (int32_t)0x80000000UL;
+            *physical = address - (int32_t)KSEG0_BASE;
             *prot = PAGE_READ | PAGE_WRITE;
         } else {
             ret = TLBRET_BADADDR;
         }
-    } else if (address < (int32_t)0xC0000000UL) {
+    } else if (address < (int32_t)KSEG2_BASE) {
         /* kseg1 */
         if (kernel_mode) {
-            *physical = address - (int32_t)0xA0000000UL;
+            *physical = address - (int32_t)KSEG1_BASE;
             *prot = PAGE_READ | PAGE_WRITE;
         } else {
             ret = TLBRET_BADADDR;
         }
-    } else if (address < (int32_t)0xE0000000UL) {
+    } else if (address < (int32_t)KSEG3_BASE) {
         /* sseg (kseg2) */
         if (supervisor_mode || kernel_mode) {
             ret = env->tlb->map_address(env, physical, prot, address, rw, access_type);