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target-mips: add TLBINV support

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For Standard TLB configuration (Config.MT=1):

TLBINV invalidates a set of TLB entries based on ASID. The virtual address is
ignored in the entry match. TLB entries which have their G bit set to 1 are not
modified.

TLBINVF causes all entries to be invalidated.

Single TLB entry can be marked as invalid on TLB entry write by having
EntryHi.EHINV set to 1.

Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
This commit is contained in:
Leon Alrae 2014-07-07 11:24:00 +01:00
parent 92ceb440d4
commit 9456c2fbcd
7 changed files with 94 additions and 8 deletions
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2
target-mips/helper.c
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@ -83,7 +83,7 @@ int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
#endif
/* Check ASID, virtual page number & size */
if ((tlb->G == 1 || tlb->ASID == ASID) && VPN == tag) {
if ((tlb->G == 1 || tlb->ASID == ASID) && VPN == tag && !tlb->EHINV) {
/* TLB match */
int n = !!(address & mask & ~(mask >> 1));
/* Check access rights */