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[Qemu-devel] [PATCH] target-mips: fix updating XContext on mmu exception


From: Yongbok Kim
Subject: [Qemu-devel] [PATCH] target-mips: fix updating XContext on mmu exception
Date: Fri, 2 Oct 2015 16:34:01 +0100

Correct updating XContext.Region field on mmu exceptions.
If Config3.CTXTC = 0 then the R filed of XContext has to be updated
with the value of bits 63..62 of the virtual address upon a TLB
exception.

Signed-off-by: Yongbok Kim <address@hidden>
---
 target-mips/helper.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/target-mips/helper.c b/target-mips/helper.c
index 01c4461..8ffc990 100644
--- a/target-mips/helper.c
+++ b/target-mips/helper.c
@@ -294,7 +294,7 @@ static void raise_mmu_exception(CPUMIPSState *env, 
target_ulong address,
 #if defined(TARGET_MIPS64)
     env->CP0_EntryHi &= env->SEGMask;
     env->CP0_XContext = (env->CP0_XContext & ((~0ULL) << (env->SEGBITS - 7))) |
-                        ((address & 0xC00000000000ULL) >> (55 - env->SEGBITS)) 
|
+                        (((address >> 62) & 0x3) << (env->SEGBITS - 9)) |
                         ((address & ((1ULL << env->SEGBITS) - 1) & 
0xFFFFFFFFFFFFE000ULL) >> 9);
 #endif
     cs->exception_index = exception;
-- 
1.7.1




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