diff options
Diffstat (limited to 'sys/uvm/uvm_object.c')
| -rw-r--r-- | sys/uvm/uvm_object.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/sys/uvm/uvm_object.c b/sys/uvm/uvm_object.c deleted file mode 100644 index 9eaaf575f50..00000000000 --- a/sys/uvm/uvm_object.c +++ /dev/null @@ -1,159 +0,0 @@ -/* $OpenBSD: uvm_object.c,v 1.1 2009/06/06 03:45:08 oga Exp $ */ - -/* - * Copyright (c) 2006 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software contributed to The NetBSD Foundation - * by Mindaugas Rasiukevicius. - * - * 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. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS - * ``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 FOUNDATION OR CONTRIBUTORS - * 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. - */ - -/* - * uvm_object.c: operate with memory objects - * - */ - -#include <sys/cdefs.h> - -#include <sys/param.h> - -#include <uvm/uvm.h> - -/* We will fetch this page count per step */ -#define FETCH_PAGECOUNT 16 - -/* - * uvm_objwire: wire the pages of entire uobj - * - * => caller must pass page-aligned start and end values - * => if the caller passes in a pageq pointer, we'll return a list of - * wired pages. - */ - -int -uvm_objwire(struct uvm_object *uobj, off_t start, off_t end, - struct pglist *pageq) -{ - int i, npages, error; - struct vm_page *pgs[FETCH_PAGECOUNT]; - off_t offset = start, left; - - left = (end - start) >> PAGE_SHIFT; - - simple_lock(&uobj->vmobjlock); - while (left) { - - npages = MIN(FETCH_PAGECOUNT, left); - - /* Get the pages */ - memset(pgs, 0, sizeof(pgs)); - error = (*uobj->pgops->pgo_get)(uobj, offset, pgs, &npages, 0, - VM_PROT_READ | VM_PROT_WRITE, UVM_ADV_SEQUENTIAL, - PGO_ALLPAGES | PGO_SYNCIO); - - if (error) - goto error; - - simple_lock(&uobj->vmobjlock); - for (i = 0; i < npages; i++) { - - KASSERT(pgs[i] != NULL); - KASSERT(!(pgs[i]->pg_flags & PG_RELEASED)); - -#if 0 - /* - * Loan break - */ - if (pgs[i]->loan_count) { - while (pgs[i]->loan_count) { - pg = uvm_loanbreak(pgs[i]); - if (!pg) { - simple_unlock(&uobj->vmobjlock); - uvm_wait("uobjwirepg"); - simple_lock(&uobj->vmobjlock); - continue; - } - } - pgs[i] = pg; - } -#endif - - if (pgs[i]->pg_flags & PQ_AOBJ) { - atomic_clearbits_int(&pgs[i]->pg_flags, - PG_CLEAN); - uao_dropswap(uobj, i); - } - } - - /* Wire the pages */ - uvm_lock_pageq(); - for (i = 0; i < npages; i++) { - uvm_pagewire(pgs[i]); - if (pageq != NULL) - TAILQ_INSERT_TAIL(pageq, pgs[i], pageq); - } - uvm_unlock_pageq(); - - /* Unbusy the pages */ - uvm_page_unbusy(pgs, npages); - - left -= npages; - offset += npages << PAGE_SHIFT; - } - simple_unlock(&uobj->vmobjlock); - - return 0; - -error: - /* Unwire the pages which have been wired */ - uvm_objunwire(uobj, start, offset); - - return error; -} - -/* - * uobj_unwirepages: unwire the pages of entire uobj - * - * => caller must pass page-aligned start and end values - */ - -void -uvm_objunwire(struct uvm_object *uobj, off_t start, off_t end) -{ - struct vm_page *pg; - off_t offset; - - simple_lock(&uobj->vmobjlock); - uvm_lock_pageq(); - for (offset = start; offset < end; offset += PAGE_SIZE) { - pg = uvm_pagelookup(uobj, offset); - - KASSERT(pg != NULL); - KASSERT(!(pg->pg_flags & PG_RELEASED)); - - uvm_pageunwire(pg); - } - uvm_unlock_pageq(); - simple_unlock(&uobj->vmobjlock); -} |