KNF
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mrg
parent
bc3395e590
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6122fae970
1684
sys/uvm/uvm_amap.c
1684
sys/uvm/uvm_amap.c
File diff suppressed because it is too large
Load Diff
@ -1,4 +1,4 @@
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/* $NetBSD: uvm_amap_i.h,v 1.3 1998/02/07 11:08:02 mrg Exp $ */
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/* $NetBSD: uvm_amap_i.h,v 1.4 1998/02/08 16:16:39 mrg Exp $ */
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/*
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* XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
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@ -53,26 +53,24 @@
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*
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* => amap should be locked by caller.
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*/
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AMAP_INLINE struct vm_anon *amap_lookup(aref, offset)
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struct vm_aref *aref;
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vm_offset_t offset;
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AMAP_INLINE struct vm_anon *
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amap_lookup(aref, offset)
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struct vm_aref *aref;
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vm_offset_t offset;
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{
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int slot;
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struct vm_amap *amap = aref->ar_amap;
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UVMHIST_FUNC("amap_lookup"); UVMHIST_CALLED(maphist);
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int slot;
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struct vm_amap *amap = aref->ar_amap;
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UVMHIST_FUNC("amap_lookup"); UVMHIST_CALLED(maphist);
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AMAP_B2SLOT(slot, offset);
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slot += aref->ar_slotoff;
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AMAP_B2SLOT(slot, offset);
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slot += aref->ar_slotoff;
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if (slot >= amap->am_nslot)
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panic("amap_lookup: offset out of range");
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if (slot >= amap->am_nslot)
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panic("amap_lookup: offset out of range");
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UVMHIST_LOG(maphist, "<- done (amap=0x%x, offset=0x%x, result=0x%x)",
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amap, offset, amap->am_anon[slot], 0);
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return(amap->am_anon[slot]);
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UVMHIST_LOG(maphist, "<- done (amap=0x%x, offset=0x%x, result=0x%x)",
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amap, offset, amap->am_anon[slot], 0);
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return(amap->am_anon[slot]);
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}
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/*
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@ -80,32 +78,30 @@ vm_offset_t offset;
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*
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* => amap should be locked by caller.
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*/
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AMAP_INLINE void amap_lookups(aref, offset, anons, npages)
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struct vm_aref *aref;
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vm_offset_t offset;
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struct vm_anon **anons;
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int npages;
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AMAP_INLINE void
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amap_lookups(aref, offset, anons, npages)
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struct vm_aref *aref;
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vm_offset_t offset;
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struct vm_anon **anons;
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int npages;
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{
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int slot;
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struct vm_amap *amap = aref->ar_amap;
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UVMHIST_FUNC("amap_lookups"); UVMHIST_CALLED(maphist);
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int slot;
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struct vm_amap *amap = aref->ar_amap;
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UVMHIST_FUNC("amap_lookups"); UVMHIST_CALLED(maphist);
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AMAP_B2SLOT(slot, offset);
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slot += aref->ar_slotoff;
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AMAP_B2SLOT(slot, offset);
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slot += aref->ar_slotoff;
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UVMHIST_LOG(maphist, " slot=%d, npages=%d, nslot=%d", slot, npages,
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amap->am_nslot, 0);
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UVMHIST_LOG(maphist, " slot=%d, npages=%d, nslot=%d", slot, npages,
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amap->am_nslot, 0);
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if ((slot + (npages - 1)) >= amap->am_nslot)
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panic("amap_lookups: offset out of range");
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if ((slot + (npages - 1)) >= amap->am_nslot)
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panic("amap_lookups: offset out of range");
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bcopy(&amap->am_anon[slot], anons, npages * sizeof(struct vm_anon *));
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bcopy(&amap->am_anon[slot], anons, npages * sizeof(struct vm_anon *));
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UVMHIST_LOG(maphist, "<- done", 0, 0, 0, 0);
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return;
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UVMHIST_LOG(maphist, "<- done", 0, 0, 0, 0);
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return;
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}
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/*
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@ -116,51 +112,50 @@ int npages;
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* pmap_page_protect on the anon's page.
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* => returns an "offset" which is meaningful to amap_unadd().
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*/
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AMAP_INLINE vm_offset_t amap_add(aref, offset, anon, replace)
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struct vm_aref *aref;
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vm_offset_t offset;
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struct vm_anon *anon;
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int replace;
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AMAP_INLINE vm_offset_t
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amap_add(aref, offset, anon, replace)
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struct vm_aref *aref;
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vm_offset_t offset;
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struct vm_anon *anon;
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int replace;
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{
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int slot;
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struct vm_amap *amap = aref->ar_amap;
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UVMHIST_FUNC("amap_add"); UVMHIST_CALLED(maphist);
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int slot;
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struct vm_amap *amap = aref->ar_amap;
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UVMHIST_FUNC("amap_add"); UVMHIST_CALLED(maphist);
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AMAP_B2SLOT(slot, offset);
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slot += aref->ar_slotoff;
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AMAP_B2SLOT(slot, offset);
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slot += aref->ar_slotoff;
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if (slot >= amap->am_nslot)
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panic("amap_add: offset out of range");
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if (slot >= amap->am_nslot)
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panic("amap_add: offset out of range");
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if (replace) {
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if (replace) {
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if (amap->am_anon[slot] == NULL)
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panic("amap_add: replacing null anon");
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if (amap->am_anon[slot]->u.an_page != NULL &&
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(amap->am_flags & AMAP_SHARED) != 0) {
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pmap_page_protect(PMAP_PGARG(amap->am_anon[slot]->u.an_page),
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VM_PROT_NONE);
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/* XXX: suppose page is supposed to be wired somewhere? */
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}
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if (amap->am_anon[slot] == NULL)
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panic("amap_add: replacing null anon");
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if (amap->am_anon[slot]->u.an_page != NULL &&
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(amap->am_flags & AMAP_SHARED) != 0) {
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pmap_page_protect(
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PMAP_PGARG(amap->am_anon[slot]->u.an_page),
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VM_PROT_NONE);
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/*
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* XXX: suppose page is supposed to be wired somewhere?
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*/
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}
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} else { /* !replace */
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if (amap->am_anon[slot] != NULL)
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panic("amap_add: slot in use");
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} else { /* !replace */
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if (amap->am_anon[slot] != NULL)
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panic("amap_add: slot in use");
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amap->am_bckptr[slot] = amap->am_nused;
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amap->am_slots[amap->am_nused] = slot;
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amap->am_nused++;
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}
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amap->am_anon[slot] = anon;
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UVMHIST_LOG(maphist, "<- done (amap=0x%x, offset=0x%x, anon=0x%x, rep=%d)",
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amap, offset, anon, replace);
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return(slot);
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amap->am_bckptr[slot] = amap->am_nused;
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amap->am_slots[amap->am_nused] = slot;
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amap->am_nused++;
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}
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amap->am_anon[slot] = anon;
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UVMHIST_LOG(maphist,
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"<- done (amap=0x%x, offset=0x%x, anon=0x%x, rep=%d)",
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amap, offset, anon, replace);
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return(slot);
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}
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/*
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@ -168,31 +163,29 @@ int replace;
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*
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* => caller must lock amap
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*/
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AMAP_INLINE void amap_unadd(amap, slot)
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struct vm_amap *amap;
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vm_offset_t slot;
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AMAP_INLINE void
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amap_unadd(amap, slot)
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struct vm_amap *amap;
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vm_offset_t slot;
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{
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int ptr;
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UVMHIST_FUNC("amap_unadd"); UVMHIST_CALLED(maphist);
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int ptr;
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UVMHIST_FUNC("amap_unadd"); UVMHIST_CALLED(maphist);
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if (slot >= amap->am_nslot)
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panic("amap_add: offset out of range");
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if (slot >= amap->am_nslot)
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panic("amap_add: offset out of range");
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if (amap->am_anon[slot] == NULL)
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panic("amap_unadd: nothing there");
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if (amap->am_anon[slot] == NULL)
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panic("amap_unadd: nothing there");
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amap->am_anon[slot] = NULL;
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ptr = amap->am_bckptr[slot];
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amap->am_anon[slot] = NULL;
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ptr = amap->am_bckptr[slot];
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if (ptr != (amap->am_nused - 1)) { /* swap to keep slots contig? */
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amap->am_slots[ptr] = amap->am_slots[amap->am_nused - 1];
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amap->am_bckptr[amap->am_slots[ptr]] = ptr; /* back link */
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}
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amap->am_nused--;
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UVMHIST_LOG(maphist, "<- done (amap=0x%x, slot=0x%x)", amap, slot,0, 0);
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if (ptr != (amap->am_nused - 1)) { /* swap to keep slots contig? */
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amap->am_slots[ptr] = amap->am_slots[amap->am_nused - 1];
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amap->am_bckptr[amap->am_slots[ptr]] = ptr; /* back link */
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}
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amap->am_nused--;
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UVMHIST_LOG(maphist, "<- done (amap=0x%x, slot=0x%x)", amap, slot,0, 0);
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}
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/*
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@ -201,33 +194,32 @@ vm_offset_t slot;
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* => amap must not be locked (we will lock)
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* => called at fork time to gain the child's reference
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*/
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AMAP_INLINE void
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amap_ref(entry, flags)
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vm_map_entry_t entry;
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int flags;
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{
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struct vm_amap *amap = entry->aref.ar_amap;
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UVMHIST_FUNC("amap_ref"); UVMHIST_CALLED(maphist);
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AMAP_INLINE void amap_ref(entry, flags)
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vm_map_entry_t entry;
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int flags;
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{
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struct vm_amap *amap = entry->aref.ar_amap;
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UVMHIST_FUNC("amap_ref"); UVMHIST_CALLED(maphist);
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simple_lock(&amap->am_l);
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amap->am_ref++;
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if (flags & AMAP_SHARED)
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amap->am_flags |= AMAP_SHARED;
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simple_lock(&amap->am_l);
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amap->am_ref++;
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if (flags & AMAP_SHARED)
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amap->am_flags |= AMAP_SHARED;
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#ifdef VM_AMAP_PPREF
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if (amap->am_ppref == NULL && (flags & AMAP_REFALL) == 0 &&
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(entry->start - entry->end) / PAGE_SIZE != amap->am_nslot)
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amap_pp_establish(amap);
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if (amap->am_ppref && amap->am_ppref != PPREF_NONE) {
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if (flags & AMAP_REFALL)
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amap_pp_adjref(amap, 0, amap->am_nslot * PAGE_SIZE, 1);
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else
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amap_pp_adjref(amap, entry->aref.ar_slotoff,
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entry->end - entry->start, 1);
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}
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if (amap->am_ppref == NULL && (flags & AMAP_REFALL) == 0 &&
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(entry->start - entry->end) / PAGE_SIZE != amap->am_nslot)
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amap_pp_establish(amap);
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if (amap->am_ppref && amap->am_ppref != PPREF_NONE) {
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if (flags & AMAP_REFALL)
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amap_pp_adjref(amap, 0, amap->am_nslot * PAGE_SIZE, 1);
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else
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amap_pp_adjref(amap, entry->aref.ar_slotoff,
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entry->end - entry->start, 1);
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}
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#endif
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simple_unlock(&amap->am_l);
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UVMHIST_LOG(maphist,"<- done! amap=0x%x", amap, 0, 0, 0);
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simple_unlock(&amap->am_l);
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UVMHIST_LOG(maphist,"<- done! amap=0x%x", amap, 0, 0, 0);
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}
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/*
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@ -238,58 +230,54 @@ int flags;
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* doesn't need to be locked.
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* => amap must be unlocked (we will lock it).
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*/
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AMAP_INLINE void amap_unref(entry, all)
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vm_map_entry_t entry;
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int all;
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AMAP_INLINE void
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amap_unref(entry, all)
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vm_map_entry_t entry;
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int all;
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{
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struct vm_amap *amap = entry->aref.ar_amap;
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UVMHIST_FUNC("amap_unref"); UVMHIST_CALLED(maphist);
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struct vm_amap *amap = entry->aref.ar_amap;
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UVMHIST_FUNC("amap_unref"); UVMHIST_CALLED(maphist);
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/*
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* lock it
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*/
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simple_lock(&amap->am_l);
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/*
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* lock it
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*/
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simple_lock(&amap->am_l);
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UVMHIST_LOG(maphist,"(entry=0x%x) amap=0x%x refs=%d, nused=%d",
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entry, amap, amap->am_ref, amap->am_nused);
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UVMHIST_LOG(maphist,"(entry=0x%x) amap=0x%x refs=%d, nused=%d",
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entry, amap, amap->am_ref, amap->am_nused);
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/*
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* if we are the last reference, free the amap and return.
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*/
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/*
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* if we are the last reference, free the amap and return.
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*/
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if (amap->am_ref == 1) {
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amap_wipeout(amap); /* drops final ref and frees */
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UVMHIST_LOG(maphist,"<- done (was last ref)!", 0, 0, 0, 0);
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return; /* no need to unlock */
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}
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if (amap->am_ref == 1) {
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amap_wipeout(amap); /* drops final ref and frees */
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UVMHIST_LOG(maphist,"<- done (was last ref)!", 0, 0, 0, 0);
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return; /* no need to unlock */
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}
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/*
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* otherwise just drop the reference count(s)
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*/
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/*
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* otherwise just drop the reference count(s)
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*/
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amap->am_ref--;
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if (amap->am_ref == 1 && (amap->am_flags & AMAP_SHARED) != 0)
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amap->am_flags &= ~AMAP_SHARED; /* clear shared flag */
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amap->am_ref--;
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if (amap->am_ref == 1 && (amap->am_flags & AMAP_SHARED) != 0)
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amap->am_flags &= ~AMAP_SHARED; /* clear shared flag */
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#ifdef VM_AMAP_PPREF
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if (amap->am_ppref == NULL && all == 0 &&
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(entry->start - entry->end) / PAGE_SIZE != amap->am_nslot)
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amap_pp_establish(amap);
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if (amap->am_ppref && amap->am_ppref != PPREF_NONE) {
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if (all)
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amap_pp_adjref(amap, 0, amap->am_nslot * PAGE_SIZE, -1);
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else
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amap_pp_adjref(amap, entry->aref.ar_slotoff,
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entry->end - entry->start, -1);
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}
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if (amap->am_ppref == NULL && all == 0 &&
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(entry->start - entry->end) / PAGE_SIZE != amap->am_nslot)
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amap_pp_establish(amap);
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if (amap->am_ppref && amap->am_ppref != PPREF_NONE) {
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if (all)
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amap_pp_adjref(amap, 0, amap->am_nslot * PAGE_SIZE, -1);
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else
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amap_pp_adjref(amap, entry->aref.ar_slotoff,
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entry->end - entry->start, -1);
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}
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#endif
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simple_unlock(&amap->am_l);
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simple_unlock(&amap->am_l);
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UVMHIST_LOG(maphist,"<- done!", 0, 0, 0, 0);
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UVMHIST_LOG(maphist,"<- done!", 0, 0, 0, 0);
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}
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#endif /* defined(UVM_AMAP_INLINE) || defined(UVM_AMAP) */
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