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Fix sign-extension of VPN field in TLB, by Herve Poussineau. 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2433 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-02-18 00:19:08 +00:00
parent 70705261e1
commit 925fd0f202
3 changed files with 3 additions and 3 deletions
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2
target-mips/helper.c
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@ -41,12 +41,12 @@ enum {
static int map_address (CPUState *env, target_ulong *physical, int *prot,
target_ulong address, int rw, int access_type)
{
uint8_t ASID = env->CP0_EntryHi & 0xFF;
int i;
for (i = 0; i < env->tlb_in_use; i++) {
tlb_t *tlb = &env->tlb[i];
/* 1k pages are not supported. */
uint8_t ASID = env->CP0_EntryHi & 0xFF;
target_ulong mask = tlb->PageMask | 0x1FFF;
target_ulong tag = address & ~mask;
int n;

2
target-mips/op.c
View File

@ -1340,7 +1340,7 @@ void op_mtc0_entryhi (void)
/* 1k pages not implemented */
/* Ignore MIPS64 TLB for now */
val = (int32_t)T0 & 0xFFFFE0FF;
val = (target_ulong)(int32_t)T0 & ~(target_ulong)0x1F00;
old = env->CP0_EntryHi;
env->CP0_EntryHi = val;
/* If the ASID changes, flush qemu's TLB. */

2
target-mips/op_helper.c
View File

@ -395,7 +395,7 @@ static void fill_tlb (int idx)
/* XXX: detect conflicting TLBs and raise a MCHECK exception when needed */
tlb = &env->tlb[idx];
tlb->VPN = env->CP0_EntryHi & (int32_t)0xFFFFE000;
tlb->VPN = env->CP0_EntryHi & ~(target_ulong)0x1FFF;
tlb->ASID = env->CP0_EntryHi & 0xFF;
tlb->PageMask = env->CP0_PageMask;
tlb->G = env->CP0_EntryLo0 & env->CP0_EntryLo1 & 1;