1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/* $OpenBSD: acpi_user.c,v 1.4 2007/01/05 14:13:29 otto Exp $ */
/*-
* Copyright (c) 1999 Doug Rabson
* Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $Id: acpi_user.c,v 1.4 2007/01/05 14:13:29 otto Exp $
* $FreeBSD: src/usr.sbin/acpi/acpidump/acpi_user.c,v 1.3 2000/11/08 02:37:00 iwasaki Exp $
*/
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <uvm/uvm_extern.h>
#include <err.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "acpidump.h"
#define vm_page_size sysconf(_SC_PAGESIZE)
static int acpi_mem_fd = -1;
struct acpi_user_mapping {
LIST_ENTRY(acpi_user_mapping) link;
vm_offset_t pa;
caddr_t va;
size_t size;
};
LIST_HEAD(acpi_user_mapping_list, acpi_user_mapping) maplist;
static void
acpi_user_init()
{
if (acpi_mem_fd == -1) {
acpi_mem_fd = open("/dev/mem", O_RDONLY);
if (acpi_mem_fd == -1)
err(1, "opening /dev/mem");
LIST_INIT(&maplist);
}
}
static struct acpi_user_mapping *
acpi_user_find_mapping(vm_offset_t pa, size_t size)
{
struct acpi_user_mapping *map;
/* First search for an existing mapping */
for (map = LIST_FIRST(&maplist); map; map = LIST_NEXT(map, link)) {
if (map->pa <= pa && map->size >= pa + size - map->pa)
return (map);
}
/* Then create a new one */
size = round_page(pa + size) - trunc_page(pa);
pa = trunc_page(pa);
map = malloc(sizeof(struct acpi_user_mapping));
if (!map)
errx(1, "out of memory");
map->pa = pa;
map->va = mmap(0, size, PROT_READ, MAP_SHARED, acpi_mem_fd, pa);
map->size = size;
if (map->va == MAP_FAILED)
err(1, "can't map address");
LIST_INSERT_HEAD(&maplist, map, link);
return (map);
}
/*
* Public interfaces
*/
struct ACPIrsdp *
acpi_find_rsd_ptr()
{
int i;
u_int8_t buf[sizeof(struct ACPIrsdp)];
acpi_user_init();
for (i = 0; i < 1024 * 1024; i += 16) {
read(acpi_mem_fd, buf, 16);
if (!memcmp(buf, "RSD PTR ", 8)) {
/* Read the rest of the structure */
read(acpi_mem_fd, buf + 16, sizeof(struct ACPIrsdp) - 16);
/* Verify checksum before accepting it. */
if (acpi_checksum(buf, sizeof(struct ACPIrsdp)))
continue;
return (acpi_map_physical(i, sizeof(struct ACPIrsdp)));
}
}
return (0);
}
void *
acpi_map_physical(vm_offset_t pa, size_t size)
{
struct acpi_user_mapping *map;
map = acpi_user_find_mapping(pa, size);
return (map->va + (pa - map->pa));
}
void
acpi_load_dsdt(char *dumpfile, u_int8_t **dpp, u_int8_t **endp)
{
u_int8_t *dp;
u_int8_t *end;
struct stat sb;
if ((acpi_mem_fd = open(dumpfile, O_RDONLY)) == -1) {
errx(1, "opening %s", dumpfile);
}
LIST_INIT(&maplist);
if (fstat(acpi_mem_fd, &sb) == -1) {
errx(1, "fstat %s", dumpfile);
}
dp = mmap(0, sb.st_size, PROT_READ, MAP_PRIVATE, acpi_mem_fd, 0);
if (dp == MAP_FAILED) {
errx(1, "mmap %s", dumpfile);
}
if (strncmp(dp, "DSDT", 4) == 0) {
memcpy(&dsdt_header, dp, SIZEOF_SDT_HDR);
dp += SIZEOF_SDT_HDR;
sb.st_size -= SIZEOF_SDT_HDR;
}
end = (u_int8_t *) dp + sb.st_size;
*dpp = dp;
*endp = end;
}
|
