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Diffstat (limited to 'sys/uvm/uvm_amap_i.h')
| -rw-r--r-- | sys/uvm/uvm_amap_i.h | 261 |
1 files changed, 0 insertions, 261 deletions
diff --git a/sys/uvm/uvm_amap_i.h b/sys/uvm/uvm_amap_i.h deleted file mode 100644 index d71cab1f7be..00000000000 --- a/sys/uvm/uvm_amap_i.h +++ /dev/null @@ -1,261 +0,0 @@ -/* $OpenBSD: uvm_amap_i.h,v 1.19 2009/03/20 15:19:04 oga Exp $ */ -/* $NetBSD: uvm_amap_i.h,v 1.15 2000/11/25 06:27:59 chs Exp $ */ - -/* - * - * Copyright (c) 1997 Charles D. Cranor and Washington University. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Charles D. Cranor and - * Washington University. - * 4. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * from: Id: uvm_amap_i.h,v 1.1.2.4 1998/01/05 18:12:57 chuck Exp - */ - -#ifndef _UVM_UVM_AMAP_I_H_ -#define _UVM_UVM_AMAP_I_H_ - -/* - * uvm_amap_i.h - */ - -/* - * if inlines are enabled always pull in these functions, otherwise - * pull them in only once (when we are compiling uvm_amap.c). - */ - -#if defined(UVM_AMAP_INLINE) || defined(UVM_AMAP_C) - -/* - * amap_lookup: look up a page in an amap - * - * => amap should be locked by caller. - */ -AMAP_INLINE struct vm_anon * -amap_lookup(struct vm_aref *aref, vaddr_t offset) -{ - int slot; - struct vm_amap *amap = aref->ar_amap; - UVMHIST_FUNC("amap_lookup"); UVMHIST_CALLED(maphist); - - AMAP_B2SLOT(slot, offset); - slot += aref->ar_pageoff; - - if (slot >= amap->am_nslot) - panic("amap_lookup: offset out of range"); - - UVMHIST_LOG(maphist, "<- done (amap=%p, offset=0x%lx, result=%p)", - amap, offset, amap->am_anon[slot], 0); - return(amap->am_anon[slot]); -} - -/* - * amap_lookups: look up a range of pages in an amap - * - * => amap should be locked by caller. - * => XXXCDC: this interface is biased toward array-based amaps. fix. - */ -AMAP_INLINE void -amap_lookups(struct vm_aref *aref, vaddr_t offset, - struct vm_anon **anons, int npages) -{ - int slot; - struct vm_amap *amap = aref->ar_amap; - UVMHIST_FUNC("amap_lookups"); UVMHIST_CALLED(maphist); - - AMAP_B2SLOT(slot, offset); - slot += aref->ar_pageoff; - - UVMHIST_LOG(maphist, " slot=%ld, npages=%ld, nslot=%ld", slot, npages, - amap->am_nslot, 0); - - if ((slot + (npages - 1)) >= amap->am_nslot) - panic("amap_lookups: offset out of range"); - - memcpy(anons, &amap->am_anon[slot], npages * sizeof(struct vm_anon *)); - - UVMHIST_LOG(maphist, "<- done", 0, 0, 0, 0); - return; -} - -/* - * amap_add: add (or replace) a page to an amap - * - * => caller must lock amap. - * => if (replace) caller must lock anon because we might have to call - * pmap_page_protect on the anon's page. - * => returns an "offset" which is meaningful to amap_unadd(). - */ -AMAP_INLINE void -amap_add(struct vm_aref *aref, vaddr_t offset, struct vm_anon *anon, - boolean_t replace) -{ - int slot; - struct vm_amap *amap = aref->ar_amap; - UVMHIST_FUNC("amap_add"); UVMHIST_CALLED(maphist); - - AMAP_B2SLOT(slot, offset); - slot += aref->ar_pageoff; - - if (slot >= amap->am_nslot) - panic("amap_add: offset out of range"); - - if (replace) { - - if (amap->am_anon[slot] == NULL) - panic("amap_add: replacing null anon"); - if (amap->am_anon[slot]->an_page != NULL && - (amap->am_flags & AMAP_SHARED) != 0) { - pmap_page_protect(amap->am_anon[slot]->an_page, - 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"); - - amap->am_bckptr[slot] = amap->am_nused; - amap->am_slots[amap->am_nused] = slot; - amap->am_nused++; - } - amap->am_anon[slot] = anon; - UVMHIST_LOG(maphist, - "<- done (amap=%p, offset=0x%lx, anon=%p, rep=%ld)", - amap, offset, anon, replace); -} - -/* - * amap_unadd: remove a page from an amap - * - * => caller must lock amap - */ -AMAP_INLINE void -amap_unadd(struct vm_aref *aref, vaddr_t offset) -{ - int ptr, slot; - struct vm_amap *amap = aref->ar_amap; - UVMHIST_FUNC("amap_unadd"); UVMHIST_CALLED(maphist); - - AMAP_B2SLOT(slot, offset); - slot += aref->ar_pageoff; - - if (slot >= amap->am_nslot) - panic("amap_unadd: offset out of range"); - - if (amap->am_anon[slot] == NULL) - panic("amap_unadd: nothing there"); - - amap->am_anon[slot] = NULL; - ptr = amap->am_bckptr[slot]; - - if (ptr != (amap->am_nused - 1)) { /* swap to keep slots contig? */ - amap->am_slots[ptr] = amap->am_slots[amap->am_nused - 1]; - amap->am_bckptr[amap->am_slots[ptr]] = ptr; /* back link */ - } - amap->am_nused--; - UVMHIST_LOG(maphist, "<- done (amap=%p, slot=%ld)", amap, slot,0, 0); -} - -/* - * amap_ref: gain a reference to an amap - * - * => amap must not be locked (we will lock) - * => "offset" and "len" are in units of pages - * => called at fork time to gain the child's reference - */ -AMAP_INLINE void -amap_ref(struct vm_amap *amap, vaddr_t offset, vsize_t len, int flags) -{ - UVMHIST_FUNC("amap_ref"); UVMHIST_CALLED(maphist); - - amap->am_ref++; - if (flags & AMAP_SHARED) - amap->am_flags |= AMAP_SHARED; -#ifdef UVM_AMAP_PPREF - if (amap->am_ppref == NULL && (flags & AMAP_REFALL) == 0 && - len != amap->am_nslot) - amap_pp_establish(amap); - if (amap->am_ppref && amap->am_ppref != PPREF_NONE) { - if (flags & AMAP_REFALL) - amap_pp_adjref(amap, 0, amap->am_nslot, 1); - else - amap_pp_adjref(amap, offset, len, 1); - } -#endif - UVMHIST_LOG(maphist,"<- done! amap=%p", amap, 0, 0, 0); -} - -/* - * amap_unref: remove a reference to an amap - * - * => caller must remove all pmap-level references to this amap before - * dropping the reference - * => called from uvm_unmap_detach [only] ... note that entry is no - * longer part of a map and thus has no need for locking - * => amap must be unlocked (we will lock it). - */ -AMAP_INLINE void -amap_unref(struct vm_amap *amap, vaddr_t offset, vsize_t len, boolean_t all) -{ - UVMHIST_FUNC("amap_unref"); UVMHIST_CALLED(maphist); - - UVMHIST_LOG(maphist," amap=%p refs=%ld, nused=%ld", - amap, amap->am_ref, amap->am_nused, 0); - - /* - * if we are the last reference, free the amap and return. - */ - - if (amap->am_ref-- == 1) { - amap_wipeout(amap); /* drops final ref and frees */ - UVMHIST_LOG(maphist,"<- done (was last ref)!", 0, 0, 0, 0); - return; /* no need to unlock */ - } - - /* - * otherwise just drop the reference count(s) - */ - if (amap->am_ref == 1 && (amap->am_flags & AMAP_SHARED) != 0) - amap->am_flags &= ~AMAP_SHARED; /* clear shared flag */ -#ifdef UVM_AMAP_PPREF - if (amap->am_ppref == NULL && all == 0 && len != amap->am_nslot) - amap_pp_establish(amap); - if (amap->am_ppref && amap->am_ppref != PPREF_NONE) { - if (all) - amap_pp_adjref(amap, 0, amap->am_nslot, -1); - else - amap_pp_adjref(amap, offset, len, -1); - } -#endif - - UVMHIST_LOG(maphist,"<- done!", 0, 0, 0, 0); -} - -#endif /* defined(UVM_AMAP_INLINE) || defined(UVM_AMAP_C) */ - -#endif /* _UVM_UVM_AMAP_I_H_ */ |