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

James Hogan
2014-06-17T22:14:11Z

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 <james.hogan@imgtec.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
---
target-mips/helper.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)

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);
--
1.9.3