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pmap_remove_pte:

Browse Source 
Use "loadandclear" to update the pte.

pmap_changebit and pmap_ts_referenced:
	Switch to pmap_TLB_invalidate from invltlb.
This commit is contained in:
alc 1999-04-10 02:58:17 +00:00
parent 5e24bc0948
commit 89b001629c
2 changed files with 14 additions and 28 deletions
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21
sys/amd64/amd64/pmap.c
View File

@ -39,7 +39,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.228 1999/04/06 04:52:27 alc Exp $
* $Id: pmap.c,v 1.229 1999/04/07 03:57:45 msmith Exp $
*/
/*
@ -1688,8 +1688,7 @@ pmap_remove_pte(pmap, ptq, va)
unsigned oldpte;
pv_table_t *ppv;
oldpte = *ptq;
*ptq = 0;
oldpte = loadandclear(ptq);
if (oldpte & PG_W)
pmap->pm_stats.wired_count -= 1;
/*
@ -3061,14 +3060,12 @@ pmap_changebit(pa, bit, setem)
register pv_entry_t pv;
pv_table_t *ppv;
register unsigned *pte;
int changed;
int s;
if (!pmap_is_managed(pa))
return;
s = splvm();
changed = 0;
ppv = pa_to_pvh(pa);
/*
@ -3098,11 +3095,10 @@ pmap_changebit(pa, bit, setem)
if (setem) {
*(int *)pte |= bit;
changed = 1;
pmap_TLB_invalidate(pv->pv_pmap, pv->pv_va);
} else {
vm_offset_t pbits = *(vm_offset_t *)pte;
if (pbits & bit) {
changed = 1;
if (bit == PG_RW) {
if (pbits & PG_M) {
vm_page_dirty(ppv->pv_vm_page);
@ -3111,12 +3107,11 @@ pmap_changebit(pa, bit, setem)
} else {
*(int *)pte = pbits & ~bit;
}
pmap_TLB_invalidate(pv->pv_pmap, pv->pv_va);
}
}
}
splx(s);
if (changed)
invltlb();
}
/*
@ -3147,7 +3142,6 @@ pmap_phys_address(ppn)
* pmap_ts_referenced:
*
* Return the count of reference bits for a page, clearing all of them.
*
*/
int
pmap_ts_referenced(vm_offset_t pa)
@ -3183,16 +3177,15 @@ pmap_ts_referenced(vm_offset_t pa)
if (pte && *pte & PG_A) {
*pte &= ~PG_A;
pmap_TLB_invalidate(pv->pv_pmap, pv->pv_va);
rtval++;
if (rtval > 4) {
break;
}
}
} while ((pv = pvn) != NULL && pv != pvf);
if (rtval) {
invltlb();
}
}
splx(s);

21
sys/i386/i386/pmap.c
View File

@ -39,7 +39,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.228 1999/04/06 04:52:27 alc Exp $
* $Id: pmap.c,v 1.229 1999/04/07 03:57:45 msmith Exp $
*/
/*
@ -1688,8 +1688,7 @@ pmap_remove_pte(pmap, ptq, va)
unsigned oldpte;
pv_table_t *ppv;
oldpte = *ptq;
*ptq = 0;
oldpte = loadandclear(ptq);
if (oldpte & PG_W)
pmap->pm_stats.wired_count -= 1;
/*
@ -3061,14 +3060,12 @@ pmap_changebit(pa, bit, setem)
register pv_entry_t pv;
pv_table_t *ppv;
register unsigned *pte;
int changed;
int s;
if (!pmap_is_managed(pa))
return;
s = splvm();
changed = 0;
ppv = pa_to_pvh(pa);
/*
@ -3098,11 +3095,10 @@ pmap_changebit(pa, bit, setem)
if (setem) {
*(int *)pte |= bit;
changed = 1;
pmap_TLB_invalidate(pv->pv_pmap, pv->pv_va);
} else {
vm_offset_t pbits = *(vm_offset_t *)pte;
if (pbits & bit) {
changed = 1;
if (bit == PG_RW) {
if (pbits & PG_M) {
vm_page_dirty(ppv->pv_vm_page);
@ -3111,12 +3107,11 @@ pmap_changebit(pa, bit, setem)
} else {
*(int *)pte = pbits & ~bit;
}
pmap_TLB_invalidate(pv->pv_pmap, pv->pv_va);
}
}
}
splx(s);
if (changed)
invltlb();
}
/*
@ -3147,7 +3142,6 @@ pmap_phys_address(ppn)
* pmap_ts_referenced:
*
* Return the count of reference bits for a page, clearing all of them.
*
*/
int
pmap_ts_referenced(vm_offset_t pa)
@ -3183,16 +3177,15 @@ pmap_ts_referenced(vm_offset_t pa)
if (pte && *pte & PG_A) {
*pte &= ~PG_A;
pmap_TLB_invalidate(pv->pv_pmap, pv->pv_va);
rtval++;
if (rtval > 4) {
break;
}
}
} while ((pv = pvn) != NULL && pv != pvf);
if (rtval) {
invltlb();
}
}
splx(s);