1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * @OSF_COPYRIGHT@ 30 */ 31/* 32 * Mach Operating System 33 * Copyright (c) 1991,1990 Carnegie Mellon University 34 * All Rights Reserved. 35 * 36 * Permission to use, copy, modify and distribute this software and its 37 * documentation is hereby granted, provided that both the copyright 38 * notice and this permission notice appear in all copies of the 39 * software, derivative works or modified versions, and any portions 40 * thereof, and that both notices appear in supporting documentation. 41 * 42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 45 * 46 * Carnegie Mellon requests users of this software to return to 47 * 48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 49 * School of Computer Science 50 * Carnegie Mellon University 51 * Pittsburgh PA 15213-3890 52 * 53 * any improvements or extensions that they make and grant Carnegie Mellon 54 * the rights to redistribute these changes. 55 */ 56/* 57 */ 58 59#include <mach/vm_param.h> 60#include <vm/vm_kern.h> 61#include <vm/vm_map.h> 62#include <i386/pmap.h> 63#include <i386/io_map_entries.h> 64 65extern vm_offset_t virtual_avail; 66 67/* 68 * Allocate and map memory for devices that may need to be mapped before 69 * Mach VM is running. 70 */ 71vm_offset_t 72io_map(vm_offset_t phys_addr, vm_size_t size, unsigned int flags) 73{ 74 vm_offset_t start; 75 76 if (kernel_map == VM_MAP_NULL) { 77 /* 78 * VM is not initialized. Grab memory. 79 */ 80 start = virtual_avail; 81 virtual_avail += round_page(size); 82 83 (void) pmap_map_bd(start, phys_addr, phys_addr + round_page(size), 84 VM_PROT_READ|VM_PROT_WRITE, 85 flags); 86 } 87 else { 88 (void) kmem_alloc_pageable(kernel_map, &start, round_page(size)); 89 (void) pmap_map(start, phys_addr, phys_addr + round_page(size), 90 VM_PROT_READ|VM_PROT_WRITE, 91 flags); 92 } 93 return (start); 94} 95 96/* just wrap this since io_map handles it */ 97 98vm_offset_t io_map_spec(vm_offset_t phys_addr, vm_size_t size, unsigned int flags) 99{ 100 return (io_map(phys_addr, size, flags)); 101} 102