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This commit is contained in:
mrg 1998-02-08 16:07:57 +00:00
parent bc3395e590
commit 6122fae970
2 changed files with 994 additions and 1000 deletions
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1684
sys/uvm/uvm_amap.c
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File diff suppressed because it is too large Load Diff

310
sys/uvm/uvm_amap_i.h
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_amap_i.h,v 1.3 1998/02/07 11:08:02 mrg Exp $ */ /* $NetBSD: uvm_amap_i.h,v 1.4 1998/02/08 16:16:39 mrg Exp $ */
/* /*
* XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE! * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
@ -53,26 +53,24 @@
* *
* => amap should be locked by caller. * => amap should be locked by caller.
*/ */
AMAP_INLINE struct vm_anon *
AMAP_INLINE struct vm_anon *amap_lookup(aref, offset) amap_lookup(aref, offset)
struct vm_aref *aref;
struct vm_aref *aref; vm_offset_t offset;
vm_offset_t offset;
{ {
int slot; int slot;
struct vm_amap *amap = aref->ar_amap; struct vm_amap *amap = aref->ar_amap;
UVMHIST_FUNC("amap_lookup"); UVMHIST_CALLED(maphist); UVMHIST_FUNC("amap_lookup"); UVMHIST_CALLED(maphist);
AMAP_B2SLOT(slot, offset); AMAP_B2SLOT(slot, offset);
slot += aref->ar_slotoff; slot += aref->ar_slotoff;
if (slot >= amap->am_nslot) if (slot >= amap->am_nslot)
panic("amap_lookup: offset out of range"); panic("amap_lookup: offset out of range");
UVMHIST_LOG(maphist, "<- done (amap=0x%x, offset=0x%x, result=0x%x)", UVMHIST_LOG(maphist, "<- done (amap=0x%x, offset=0x%x, result=0x%x)",
amap, offset, amap->am_anon[slot], 0); amap, offset, amap->am_anon[slot], 0);
return(amap->am_anon[slot]); return(amap->am_anon[slot]);
} }
/* /*
@ -80,32 +78,30 @@ vm_offset_t offset;
* *
* => amap should be locked by caller. * => amap should be locked by caller.
*/ */
AMAP_INLINE void
AMAP_INLINE void amap_lookups(aref, offset, anons, npages) amap_lookups(aref, offset, anons, npages)
struct vm_aref *aref;
struct vm_aref *aref; vm_offset_t offset;
vm_offset_t offset; struct vm_anon **anons;
struct vm_anon **anons; int npages;
int npages;
{ {
int slot; int slot;
struct vm_amap *amap = aref->ar_amap; struct vm_amap *amap = aref->ar_amap;
UVMHIST_FUNC("amap_lookups"); UVMHIST_CALLED(maphist); UVMHIST_FUNC("amap_lookups"); UVMHIST_CALLED(maphist);
AMAP_B2SLOT(slot, offset); AMAP_B2SLOT(slot, offset);
slot += aref->ar_slotoff; slot += aref->ar_slotoff;
UVMHIST_LOG(maphist, " slot=%d, npages=%d, nslot=%d", slot, npages, UVMHIST_LOG(maphist, " slot=%d, npages=%d, nslot=%d", slot, npages,
amap->am_nslot, 0); amap->am_nslot, 0);
if ((slot + (npages - 1)) >= amap->am_nslot) if ((slot + (npages - 1)) >= amap->am_nslot)
panic("amap_lookups: offset out of range"); panic("amap_lookups: offset out of range");
bcopy(&amap->am_anon[slot], anons, npages * sizeof(struct vm_anon *)); bcopy(&amap->am_anon[slot], anons, npages * sizeof(struct vm_anon *));
UVMHIST_LOG(maphist, "<- done", 0, 0, 0, 0); UVMHIST_LOG(maphist, "<- done", 0, 0, 0, 0);
return; return;
} }
/* /*
@ -116,51 +112,50 @@ int npages;
* pmap_page_protect on the anon's page. * pmap_page_protect on the anon's page.
* => returns an "offset" which is meaningful to amap_unadd(). * => returns an "offset" which is meaningful to amap_unadd().
*/ */
AMAP_INLINE vm_offset_t
AMAP_INLINE vm_offset_t amap_add(aref, offset, anon, replace) amap_add(aref, offset, anon, replace)
struct vm_aref *aref;
struct vm_aref *aref; vm_offset_t offset;
vm_offset_t offset; struct vm_anon *anon;
struct vm_anon *anon; int replace;
int replace;
{ {
int slot; int slot;
struct vm_amap *amap = aref->ar_amap; struct vm_amap *amap = aref->ar_amap;
UVMHIST_FUNC("amap_add"); UVMHIST_CALLED(maphist); UVMHIST_FUNC("amap_add"); UVMHIST_CALLED(maphist);
AMAP_B2SLOT(slot, offset); AMAP_B2SLOT(slot, offset);
slot += aref->ar_slotoff; slot += aref->ar_slotoff;
if (slot >= amap->am_nslot) if (slot >= amap->am_nslot)
panic("amap_add: offset out of range"); panic("amap_add: offset out of range");
if (replace) { if (replace) {
if (amap->am_anon[slot] == NULL) if (amap->am_anon[slot] == NULL)
panic("amap_add: replacing null anon"); panic("amap_add: replacing null anon");
if (amap->am_anon[slot]->u.an_page != NULL && if (amap->am_anon[slot]->u.an_page != NULL &&
(amap->am_flags & AMAP_SHARED) != 0) { (amap->am_flags & AMAP_SHARED) != 0) {
pmap_page_protect(PMAP_PGARG(amap->am_anon[slot]->u.an_page), pmap_page_protect(
VM_PROT_NONE); PMAP_PGARG(amap->am_anon[slot]->u.an_page),
/* XXX: suppose page is supposed to be wired somewhere? */ VM_PROT_NONE);
} /*
* XXX: suppose page is supposed to be wired somewhere?
*/
}
} else { /* !replace */
if (amap->am_anon[slot] != NULL)
panic("amap_add: slot in use");
} else { /* !replace */ amap->am_bckptr[slot] = amap->am_nused;
amap->am_slots[amap->am_nused] = slot;
if (amap->am_anon[slot] != NULL) amap->am_nused++;
panic("amap_add: slot in use"); }
amap->am_anon[slot] = anon;
amap->am_bckptr[slot] = amap->am_nused; UVMHIST_LOG(maphist,
amap->am_slots[amap->am_nused] = slot; "<- done (amap=0x%x, offset=0x%x, anon=0x%x, rep=%d)",
amap->am_nused++; amap, offset, anon, replace);
}
amap->am_anon[slot] = anon;
UVMHIST_LOG(maphist, "<- done (amap=0x%x, offset=0x%x, anon=0x%x, rep=%d)",
amap, offset, anon, replace);
return(slot);
return(slot);
} }
/* /*
@ -168,31 +163,29 @@ int replace;
* *
* => caller must lock amap * => caller must lock amap
*/ */
AMAP_INLINE void
AMAP_INLINE void amap_unadd(amap, slot) amap_unadd(amap, slot)
struct vm_amap *amap;
struct vm_amap *amap; vm_offset_t slot;
vm_offset_t slot;
{ {
int ptr; int ptr;
UVMHIST_FUNC("amap_unadd"); UVMHIST_CALLED(maphist); UVMHIST_FUNC("amap_unadd"); UVMHIST_CALLED(maphist);
if (slot >= amap->am_nslot) if (slot >= amap->am_nslot)
panic("amap_add: offset out of range"); panic("amap_add: offset out of range");
if (amap->am_anon[slot] == NULL) if (amap->am_anon[slot] == NULL)
panic("amap_unadd: nothing there"); panic("amap_unadd: nothing there");
amap->am_anon[slot] = NULL; amap->am_anon[slot] = NULL;
ptr = amap->am_bckptr[slot]; ptr = amap->am_bckptr[slot];
if (ptr != (amap->am_nused - 1)) { /* swap to keep slots contig? */ if (ptr != (amap->am_nused - 1)) { /* swap to keep slots contig? */
amap->am_slots[ptr] = amap->am_slots[amap->am_nused - 1]; amap->am_slots[ptr] = amap->am_slots[amap->am_nused - 1];
amap->am_bckptr[amap->am_slots[ptr]] = ptr; /* back link */ amap->am_bckptr[amap->am_slots[ptr]] = ptr; /* back link */
} }
amap->am_nused--; amap->am_nused--;
UVMHIST_LOG(maphist, "<- done (amap=0x%x, slot=0x%x)", amap, slot,0, 0); UVMHIST_LOG(maphist, "<- done (amap=0x%x, slot=0x%x)", amap, slot,0, 0);
} }
/* /*
@ -201,33 +194,32 @@ vm_offset_t slot;
* => amap must not be locked (we will lock) * => amap must not be locked (we will lock)
* => called at fork time to gain the child's reference * => called at fork time to gain the child's reference
*/ */
AMAP_INLINE void
amap_ref(entry, flags)
vm_map_entry_t entry;
int flags;
{
struct vm_amap *amap = entry->aref.ar_amap;
UVMHIST_FUNC("amap_ref"); UVMHIST_CALLED(maphist);
AMAP_INLINE void amap_ref(entry, flags) simple_lock(&amap->am_l);
amap->am_ref++;
vm_map_entry_t entry; if (flags & AMAP_SHARED)
int flags; amap->am_flags |= AMAP_SHARED;
{
struct vm_amap *amap = entry->aref.ar_amap;
UVMHIST_FUNC("amap_ref"); UVMHIST_CALLED(maphist);
simple_lock(&amap->am_l);
amap->am_ref++;
if (flags & AMAP_SHARED)
amap->am_flags |= AMAP_SHARED;
#ifdef VM_AMAP_PPREF #ifdef VM_AMAP_PPREF
if (amap->am_ppref == NULL && (flags & AMAP_REFALL) == 0 && if (amap->am_ppref == NULL && (flags & AMAP_REFALL) == 0 &&
(entry->start - entry->end) / PAGE_SIZE != amap->am_nslot) (entry->start - entry->end) / PAGE_SIZE != amap->am_nslot)
amap_pp_establish(amap); amap_pp_establish(amap);
if (amap->am_ppref && amap->am_ppref != PPREF_NONE) { if (amap->am_ppref && amap->am_ppref != PPREF_NONE) {
if (flags & AMAP_REFALL) if (flags & AMAP_REFALL)
amap_pp_adjref(amap, 0, amap->am_nslot * PAGE_SIZE, 1); amap_pp_adjref(amap, 0, amap->am_nslot * PAGE_SIZE, 1);
else else
amap_pp_adjref(amap, entry->aref.ar_slotoff, amap_pp_adjref(amap, entry->aref.ar_slotoff,
entry->end - entry->start, 1); entry->end - entry->start, 1);
} }
#endif #endif
simple_unlock(&amap->am_l); simple_unlock(&amap->am_l);
UVMHIST_LOG(maphist,"<- done! amap=0x%x", amap, 0, 0, 0); UVMHIST_LOG(maphist,"<- done! amap=0x%x", amap, 0, 0, 0);
} }
/* /*
@ -238,58 +230,54 @@ int flags;
* doesn't need to be locked. * doesn't need to be locked.
* => amap must be unlocked (we will lock it). * => amap must be unlocked (we will lock it).
*/ */
AMAP_INLINE void
AMAP_INLINE void amap_unref(entry, all) amap_unref(entry, all)
vm_map_entry_t entry;
vm_map_entry_t entry; int all;
int all;
{ {
struct vm_amap *amap = entry->aref.ar_amap; struct vm_amap *amap = entry->aref.ar_amap;
UVMHIST_FUNC("amap_unref"); UVMHIST_CALLED(maphist); UVMHIST_FUNC("amap_unref"); UVMHIST_CALLED(maphist);
/* /*
* lock it * lock it
*/ */
simple_lock(&amap->am_l); simple_lock(&amap->am_l);
UVMHIST_LOG(maphist,"(entry=0x%x) amap=0x%x refs=%d, nused=%d", UVMHIST_LOG(maphist,"(entry=0x%x) amap=0x%x refs=%d, nused=%d",
entry, amap, amap->am_ref, amap->am_nused); entry, amap, amap->am_ref, amap->am_nused);
/* /*
* if we are the last reference, free the amap and return. * if we are the last reference, free the amap and return.
*/ */
if (amap->am_ref == 1) { if (amap->am_ref == 1) {
amap_wipeout(amap); /* drops final ref and frees */ amap_wipeout(amap); /* drops final ref and frees */
UVMHIST_LOG(maphist,"<- done (was last ref)!", 0, 0, 0, 0); UVMHIST_LOG(maphist,"<- done (was last ref)!", 0, 0, 0, 0);
return; /* no need to unlock */ return; /* no need to unlock */
} }
/* /*
* otherwise just drop the reference count(s) * otherwise just drop the reference count(s)
*/ */
amap->am_ref--; amap->am_ref--;
if (amap->am_ref == 1 && (amap->am_flags & AMAP_SHARED) != 0) if (amap->am_ref == 1 && (amap->am_flags & AMAP_SHARED) != 0)
amap->am_flags &= ~AMAP_SHARED; /* clear shared flag */ amap->am_flags &= ~AMAP_SHARED; /* clear shared flag */
#ifdef VM_AMAP_PPREF #ifdef VM_AMAP_PPREF
if (amap->am_ppref == NULL && all == 0 && if (amap->am_ppref == NULL && all == 0 &&
(entry->start - entry->end) / PAGE_SIZE != amap->am_nslot) (entry->start - entry->end) / PAGE_SIZE != amap->am_nslot)
amap_pp_establish(amap); amap_pp_establish(amap);
if (amap->am_ppref && amap->am_ppref != PPREF_NONE) { if (amap->am_ppref && amap->am_ppref != PPREF_NONE) {
if (all) if (all)
amap_pp_adjref(amap, 0, amap->am_nslot * PAGE_SIZE, -1); amap_pp_adjref(amap, 0, amap->am_nslot * PAGE_SIZE, -1);
else else
amap_pp_adjref(amap, entry->aref.ar_slotoff, amap_pp_adjref(amap, entry->aref.ar_slotoff,
entry->end - entry->start, -1); entry->end - entry->start, -1);
} }
#endif #endif
simple_unlock(&amap->am_l);
simple_unlock(&amap->am_l); UVMHIST_LOG(maphist,"<- done!", 0, 0, 0, 0);
UVMHIST_LOG(maphist,"<- done!", 0, 0, 0, 0);
} }
#endif /* defined(UVM_AMAP_INLINE) || defined(UVM_AMAP) */ #endif /* defined(UVM_AMAP_INLINE) || defined(UVM_AMAP) */