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Execute an initial ptesync if and only if the PTE is actually being

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invalidated, as opposed to a ref/changed bit update.
This commit is contained in:
Nathan Whitehorn 2012-04-06 22:33:13 +00:00
parent bf8f8f340e
commit b7d0d1fabf
1 changed files with 7 additions and 14 deletions
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21
sys/powerpc/aim/moea64_native.c
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@ -153,13 +153,10 @@ TLBIE(uint64_t vpn) {
vpn &= ~(0xffffULL << 48);
#ifdef __powerpc64__
sched_pin();
__asm __volatile("ptesync");
mtx_lock(&tlbie_mutex);
__asm __volatile("tlbie %0" :: "r"(vpn) : "memory");
mtx_unlock(&tlbie_mutex);
__asm __volatile("eieio; tlbsync; ptesync");
sched_unpin();
#else
vpn_hi = (uint32_t)(vpn >> 32);
vpn_lo = (uint32_t)vpn;
@ -171,7 +168,6 @@ TLBIE(uint64_t vpn) {
mr %1, %0; \
insrdi %1,%5,1,0; \
mtmsrd %1; isync; \
ptesync; \
\
sld %1,%2,%4; \
or %1,%1,%3; \
@ -265,7 +261,9 @@ moea64_pte_clear_native(mmu_t mmu, uintptr_t pt_cookie, struct lpte *pvo_pt,
* As shown in Section 7.6.3.2.3
*/
pt->pte_lo &= ~ptebit;
sched_pin();
TLBIE(vpn);
sched_unpin();
}
static void
@ -295,21 +293,16 @@ moea64_pte_unset_native(mmu_t mmu, uintptr_t pt_cookie, struct lpte *pvo_pt,
{
struct lpte *pt = (struct lpte *)pt_cookie;
pvo_pt->pte_hi &= ~LPTE_VALID;
/* Finish all pending operations */
isync();
/*
* Force the reg & chg bits back into the PTEs.
*/
SYNC();
/*
* Invalidate the pte.
*/
isync();
sched_pin();
pvo_pt->pte_hi &= ~LPTE_VALID;
pt->pte_hi &= ~LPTE_VALID;
PTESYNC();
TLBIE(vpn);
sched_unpin();
/*
* Save the reg & chg bits.