source: mainline/arch/ia32/src/acpi/acpi.c@ 87cb9e2

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 87cb9e2 was ed0dd65, checked in by Jakub Jermar <jakub@…>, 20 years ago

More ACPI work.
Initial MADT table parsing.

SMP renaming and reorganization to reflect there are more ways to bring SMP up.
  • Property mode set to 100644
File size: 5.3 KB
Line 
1/*
2 * Copyright (C) 2005 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <arch/acpi/acpi.h>
30#include <arch/acpi/madt.h>
31#include <arch/bios/bios.h>
32
33#include <mm/page.h>
34
35#define RSDP_SIGNATURE "RSD PTR "
36#define RSDP_REVISION_OFFS 15
37
38struct acpi_rsdp *acpi_rsdp = NULL;
39struct acpi_rsdt *acpi_rsdt = NULL;
40struct acpi_xsdt *acpi_xsdt = NULL;
41
42struct acpi_signature_map signature_map[] = {
43 { "APIC", (struct acpi_sdt_header **) &acpi_madt, "Multiple APIC Description Table" }
44};
45
46int rsdp_check(__u8 *rsdp) {
47 struct acpi_rsdp *r = (struct acpi_rsdp *) rsdp;
48 __u8 sum = 0;
49 int i;
50
51 for (i=0; i<20; i++)
52 sum += rsdp[i];
53
54 if (sum)
55 return 0; /* bad checksum */
56
57 if (r->revision == 0)
58 return 1; /* ACPI 1.0 */
59
60 for (; i<r->length; i++)
61 sum += rsdp[i];
62
63 return !sum;
64
65}
66
67int acpi_sdt_check(__u8 *sdt)
68{
69 struct acpi_sdt_header *h = (struct acpi_sdt_header *) sdt;
70 __u8 sum = 0;
71 int i;
72
73 for (i=0; i<h->length; i++)
74 sum += sdt[i];
75
76 return !sum;
77}
78
79void map_sdt(struct acpi_sdt_header *sdt)
80{
81 int i, cnt, length;
82
83 map_page_to_frame((__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0);
84
85 length = sdt->length + ((__address) sdt) - ((__address) sdt)&0xfffff000;
86 cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0);
87
88 for (i = 1; i < cnt; i++)
89 map_page_to_frame(((__address) sdt) + i*PAGE_SIZE, ((__address) sdt) + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0);
90}
91
92void acpi_init(void)
93{
94 __u8 *addr[2] = { NULL, (__u8 *) 0xe0000 };
95 int i, j, length[2] = { 1024, 128*1024 };
96 __u64 *sig = (__u64 *) RSDP_SIGNATURE;
97
98 /*
99 * Find Root System Description Pointer
100 * 1. search first 1K of EBDA
101 * 2. search 128K starting at 0xe0000
102 */
103
104 addr[0] = (__u8 *) ebda;
105 for (i = (ebda ? 0 : 1); i < 2; i++) {
106 for (j = 0; j < length[i]; j += 16) {
107 if (*((__u64 *) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) {
108 acpi_rsdp = (struct acpi_rsdp *) &addr[i][j];
109 goto rsdp_found;
110 }
111 }
112 }
113
114 return;
115
116rsdp_found:
117 printf("%L: ACPI Root System Description Pointer\n", acpi_rsdp);
118
119 acpi_rsdt = (struct acpi_rsdt *) acpi_rsdp->rsdt_address;
120 if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((__address) acpi_rsdp->xsdt_address);
121
122 if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt);
123 if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt);
124
125 if (acpi_rsdt && !acpi_sdt_check((__u8 *) acpi_rsdt)) {
126 printf("RSDT: %s\n", "bad checksum");
127 return;
128 }
129 if (acpi_xsdt && !acpi_sdt_check((__u8 *) acpi_xsdt)) {
130 printf("XSDT: %s\n", "bad checksum");
131 return;
132 }
133
134 if (acpi_xsdt) configure_via_xsdt();
135 else if (acpi_rsdt) configure_via_rsdt();
136
137}
138
139void configure_via_rsdt(void)
140{
141 int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u32);
142
143 for (i=0; i<cnt; i++) {
144 for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
145 struct acpi_sdt_header *h = (struct acpi_sdt_header *) acpi_rsdt->entry[i];
146
147 map_sdt(h);
148 if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) {
149 if (!acpi_sdt_check((__u8 *) h))
150 goto next;
151 *signature_map[j].sdt_ptr = h;
152 printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
153 }
154 }
155next:
156 ;
157 }
158}
159
160void configure_via_xsdt(void)
161{
162 int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u64);
163
164 for (i=0; i<cnt; i++) {
165 for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
166 struct acpi_sdt_header *h = (struct acpi_sdt_header *) ((__address) acpi_rsdt->entry[i]);
167
168 map_sdt(h);
169 if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) {
170 if (!acpi_sdt_check((__u8 *) h))
171 goto next;
172 *signature_map[j].sdt_ptr = h;
173 printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
174 }
175 }
176next:
177 ;
178 }
179
180}
Note: See TracBrowser for help on using the repository browser.