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target-mips: fix updating XContext on mmu exception

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Correct updating XContext.Region field on mmu exceptions.
If Config3.CTXTC = 0 then the R field of XContext has to be updated
with the value of bits 63..62 of the virtual address upon a TLB
exception.
Also fixed the below line which overs 80 characters.

Backports commit 60270f85cc93d2d34e45b7679c374b1d771f0eeb from qemu
This commit is contained in:
Yongbok Kim 2018-02-17 14:46:10 -05:00 committed by Lioncash
parent d4213b6389
commit 6212fb2dc7
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 4 additions and 3 deletions
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7
qemu/target-mips/helper.c
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@ -281,9 +281,10 @@ static void raise_mmu_exception(CPUMIPSState *env, target_ulong address,
(env->CP0_EntryHi & 0xFF) | (address & (TARGET_PAGE_MASK << 1));
#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 & ((1ULL << env->SEGBITS) - 1) & 0xFFFFFFFFFFFFE000ULL) >> 9);
env->CP0_XContext =
/* PTEBase */ (env->CP0_XContext & ((~0ULL) << (env->SEGBITS - 7))) |
/* R */ (extract64(address, 62, 2) << (env->SEGBITS - 9)) |
/* BadVPN2 */ (extract64(address, 13, env->SEGBITS - 13) << 4);
#endif
cs->exception_index = exception;
env->error_code = error_code;