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#include <san/kasan.h>
65
66extern vm_offset_t virtual_avail;
67
68/*
69 * Allocate and map memory for devices that may need to be mapped before
70 * Mach VM is running.
71 */
72vm_offset_t
73io_map(vm_map_offset_t phys_addr, vm_size_t size, unsigned int flags)
74{
75 vm_offset_t start;
76
77 if (kernel_map == VM_MAP_NULL) {
78 /*
79 * VM is not initialized. Grab memory.
80 */
81 start = virtual_avail;
82 virtual_avail += round_page(size);
83
84#if KASAN
85 kasan_notify_address(start, size);
86#endif
87 (void) pmap_map_bd(start, phys_addr, phys_addr + round_page(size),
88 VM_PROT_READ|VM_PROT_WRITE,
89 flags);
90 }
91 else {
92 (void) kmem_alloc_pageable(kernel_map, &start, round_page(size), VM_KERN_MEMORY_IOKIT);
93 (void) pmap_map(start, phys_addr, phys_addr + round_page(size),
94 VM_PROT_READ|VM_PROT_WRITE,
95 flags);
96 }
97 return (start);
98}
99
100/* just wrap this since io_map handles it */
101
102vm_offset_t io_map_spec(vm_map_offset_t phys_addr, vm_size_t size, unsigned int flags)
103{
104 return (io_map(phys_addr, size, flags));
105}
106