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PPC: e500: Fix TLB lookup for 32bit CPUs 

When we run 32bit guest CPUs (or 32bit guest code on 64bit CPUs) on
qemu-system-ppc64 the TLB lookup will use the full effective address
as pointer.

However, only the first 32bits are valid when MSR.CM = 0. Check for
that condition.

This makes QEMU boot an e500v2 guest with more than 1G of RAM for me.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2014-06-04 00:27:31 +02:00
parent f2e2bc9ca0
commit deb6ed13eb
1 changed files with 5 additions and 0 deletions
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5
target-ppc/mmu_helper.c
View File

@ -903,6 +903,11 @@ static int ppcmas_tlb_check(CPUPPCState *env, ppcmas_tlb_t *tlb,
target_ulong mask; target_ulong mask;
uint32_t tlb_pid; uint32_t tlb_pid;
if (!msr_cm) {
/* In 32bit mode we can only address 32bit EAs */
address = (uint32_t)address;
}
/* Check valid flag */ /* Check valid flag */
if (!(tlb->mas1 & MAS1_VALID)) { if (!(tlb->mas1 & MAS1_VALID)) {
return -1; return -1;