/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ #include <string.h> #include <mach/vm_param.h> #include <mach/boolean.h> #include <vm/pmap.h> #include <vm/vm_page.h> #include <kern/misc_protos.h> /* * pmap_zero_page zeros the specified (machine independent) page. */ void pmap_zero_page( vm_offset_t p) { assert(p != vm_page_fictitious_addr); bzero((char *)phystokv(p), PAGE_SIZE); } /* * pmap_zero_part_page * zeros the specified (machine independent) part of a page. */ void pmap_zero_part_page( vm_offset_t p, vm_offset_t offset, vm_size_t len) { assert(p != vm_page_fictitious_addr); assert(offset + len <= PAGE_SIZE); bzero((char *)phystokv(p) + offset, len); } /* * pmap_copy_page copies the specified (machine independent) pages. */ void pmap_copy_page( vm_offset_t src, vm_offset_t dst) { assert(src != vm_page_fictitious_addr); assert(dst != vm_page_fictitious_addr); memcpy((void *)phystokv(dst), (void *)phystokv(src), PAGE_SIZE); } /* * pmap_copy_page copies the specified (machine independent) pages. */ void pmap_copy_part_page( vm_offset_t src, vm_offset_t src_offset, vm_offset_t dst, vm_offset_t dst_offset, vm_size_t len) { assert(src != vm_page_fictitious_addr); assert(dst != vm_page_fictitious_addr); assert(((dst & PAGE_MASK) + dst_offset + len) <= PAGE_SIZE); assert(((src & PAGE_MASK) + src_offset + len) <= PAGE_SIZE); memcpy((void *)(phystokv(dst) + dst_offset), (void *)(phystokv(src) + src_offset), len); } /* * pmap_copy_part_lpage copies part of a virtually addressed page * to a physically addressed page. */ void pmap_copy_part_lpage( vm_offset_t src, vm_offset_t dst, vm_offset_t dst_offset, vm_size_t len) { assert(src != vm_page_fictitious_addr); assert(dst != vm_page_fictitious_addr); assert(((dst & PAGE_MASK) + dst_offset + len) <= PAGE_SIZE); memcpy((void *)(phystokv(dst) + dst_offset), (void *)src, len); } /* * pmap_copy_part_rpage copies part of a physically addressed page * to a virtually addressed page. */ void pmap_copy_part_rpage( vm_offset_t src, vm_offset_t src_offset, vm_offset_t dst, vm_size_t len) { assert(src != vm_page_fictitious_addr); assert(dst != vm_page_fictitious_addr); assert(((src & PAGE_MASK) + src_offset + len) <= PAGE_SIZE); memcpy((void *)dst, (void *)(phystokv(src) + src_offset), len); } /* * kvtophys(addr) * * Convert a kernel virtual address to a physical address */ vm_offset_t kvtophys( vm_offset_t addr) { pt_entry_t *pte; if ((pte = pmap_pte(kernel_pmap, addr)) == PT_ENTRY_NULL) return 0; return i386_trunc_page(*pte) | (addr & INTEL_OFFMASK); }