Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added pv_syncflags() (unused) and debug stuff.

Browse Source
This commit is contained in:
eeh 1998-08-23 15:51:23 +00:00
parent a579357e66
commit 41fb08c335
1 changed files with 80 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
sys/arch/sparc64/sparc64/pmap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.4 1998/08/13 02:10:47 eeh Exp $ */
/* $NetBSD: pmap.c,v 1.5 1998/08/23 15:51:23 eeh Exp $ */
/* #define NO_VCACHE /* Don't forget the locked TLB in dostart */
#define HWREF
/* #define BOOT_DEBUG */
@ -183,6 +183,7 @@ static int ptelookup_va __P((vaddr_t va)); /* sun4u */
static void tsb_enter __P((int ctx, int64_t va, int64_t data));
static void pmap_pinit __P((struct pmap *));
static void pmap_release __P((pmap_t));
static int pv_syncflags __P((pv_entry_t));
struct pmap_stats {
int ps_unlink_pvfirst; /* # of pv_unlinks on head */
@ -2424,6 +2425,54 @@ int64_t data;
splx(s);
}
/*
* Do whatever is needed to sync the MOD/REF flags
*/
int
pv_syncflags(pv)
pv_entry_t pv;
{
pv_entry_t npv;
int s = splimp();
int flags = pv->pv_va&PV_MASK;
if (pv->pv_pmap != NULL)
for (npv = pv; npv; npv = npv->pv_next) {
int64_t data;
/* First clear the mod bit in the PTE and make it R/O */
ASSERT(npv->pv_pmap->pm_segs[va_to_seg(npv->pv_va&PV_VAMASK)]);
data = pseg_get(npv->pv_pmap, npv->pv_va&PV_VAMASK);
/* Need to both clear the modify and write bits */
if (data & (TLB_MODIFY|TLB_W))
flags |= PV_MOD;
#ifdef HWREF
if (data & (TLB_ACCESS))
flags |= PV_REF;
#else
if (data < 0)
flags |= PV_REF;
#endif
data &= ~(TLB_MODIFY|TLB_ACCESS);
ASSERT((data & TLB_NFO) == 0);
if (pseg_set(npv->pv_pmap, npv->pv_va&PV_VAMASK, data)) {
printf("pmap_clear_modify: gotten pseg empty!\n");
Debugger();
/* panic? */
}
/* Then clear the mod bit in the pv */
flags |= npv->pv_va&PV_MASK;
npv->pv_va &= ~(PV_MOD|PV_REF);
}
pv->pv_va |= flags&(PV_MOD|PV_REF);
#ifdef DEBUG
if (pv->pv_va & PV_MOD)
pv->pv_va |= PV_WE; /* Remember this was modified */
#endif
splx(s);
return (flags);
}
#if defined(PMAP_NEW)
boolean_t
pmap_clear_modify(pg)
@ -2496,6 +2545,19 @@ pmap_clear_modify(pa)
}
splx(s);
pv_check();
#ifdef DEBUG
#if defined(PMAP_NEW)
if (pmap_is_modified(pg)) {
printf("pmap_clear_modify(): %p still modified!\n", pg);
Debugger();
}
#else
if (pmap_is_modified(pa)) {
printf("pmap_clear_modify(): %p still modified!\n", (long)pa);
Debugger();
}
#endif
#endif
#if defined(PMAP_NEW)
return (changed);
#endif
@ -2530,6 +2592,10 @@ pmap_clear_reference(pa)
/* Clear all references */
s = splimp();
pv = pa_to_pvh(pa);
#ifdef NOT_DEBUG
if (pv->pv_va & PV_MOD)
printf("pmap_clear_reference(): pv %p still modified\n", (long)pa);
#endif
#if defined(PMAP_NEW)
if (pv->pv_va & PV_REF)
changed |= 1;
@ -2571,6 +2637,19 @@ pmap_clear_reference(pa)
blast_vcache();
splx(s);
pv_check();
#ifdef DEBUG
#if defined(PMAP_NEW)
if (pmap_is_referenced(pg)) {
printf("pmap_clear_reference(): %p still referenced!\n", pg);
Debugger();
}
#else
if (pmap_is_referenced(pa)) {
printf("pmap_clear_reference(): %p still referenced!\n", (long)pa);
Debugger();
}
#endif
#endif
#if defined(PMAP_NEW)
return (changed);
#endif