source: mainline/genarch/src/firmware/acpi/acpi.c@ 807d2d4

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 807d2d4 was 807d2d4, checked in by Jakub Jermar <jakub@…>, 20 years ago

Move ACPI code to genarch.
Enable it for ia32, amd64 and ia64.
For now, ia64 support is commented out.
  • Property mode set to 100644
File size: 5.0 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 <genarch/firmware/acpi/acpi.h>
30#include <genarch/firmware/acpi/madt.h>
31#include <arch/bios/bios.h>
32
33#include <mm/page.h>
34#include <print.h>
35
36#define RSDP_SIGNATURE "RSD PTR "
37#define RSDP_REVISION_OFFS 15
38
39struct acpi_rsdp *acpi_rsdp = NULL;
40struct acpi_rsdt *acpi_rsdt = NULL;
41struct acpi_xsdt *acpi_xsdt = NULL;
42
43struct acpi_signature_map signature_map[] = {
44 { (__u8 *)"APIC", (struct acpi_sdt_header **) &acpi_madt, "Multiple APIC Description Table" }
45};
46
47int rsdp_check(__u8 *rsdp) {
48 struct acpi_rsdp *r = (struct acpi_rsdp *) rsdp;
49 __u8 sum = 0;
50 int i;
51
52 for (i=0; i<20; i++)
53 sum += rsdp[i];
54
55 if (sum)
56 return 0; /* bad checksum */
57
58 if (r->revision == 0)
59 return 1; /* ACPI 1.0 */
60
61 for (; i<r->length; i++)
62 sum += rsdp[i];
63
64 return !sum;
65
66}
67
68int acpi_sdt_check(__u8 *sdt)
69{
70 struct acpi_sdt_header *h = (struct acpi_sdt_header *) sdt;
71 __u8 sum = 0;
72 int i;
73
74 for (i=0; i<h->length; i++)
75 sum += sdt[i];
76
77 return !sum;
78}
79
80void map_sdt(struct acpi_sdt_header *sdt)
81{
82 map_page_to_frame((__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0);
83 map_structure((__address) sdt, sdt->length);
84}
85
86void acpi_init(void)
87{
88 __u8 *addr[2] = { NULL, (__u8 *) PA2KA(0xe0000) };
89 int i, j, length[2] = { 1024, 128*1024 };
90 __u64 *sig = (__u64 *) RSDP_SIGNATURE;
91
92 /*
93 * Find Root System Description Pointer
94 * 1. search first 1K of EBDA
95 * 2. search 128K starting at 0xe0000
96 */
97
98 addr[0] = (__u8 *) PA2KA(ebda);
99 for (i = (ebda ? 0 : 1); i < 2; i++) {
100 for (j = 0; j < length[i]; j += 16) {
101 if (*((__u64 *) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) {
102 acpi_rsdp = (struct acpi_rsdp *) &addr[i][j];
103 goto rsdp_found;
104 }
105 }
106 }
107
108 return;
109
110rsdp_found:
111 printf("%P: ACPI Root System Description Pointer\n", acpi_rsdp);
112
113 acpi_rsdt = (struct acpi_rsdt *) (__native) acpi_rsdp->rsdt_address;
114 if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((__address) acpi_rsdp->xsdt_address);
115
116 if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt);
117 if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt);
118
119 if (acpi_rsdt && !acpi_sdt_check((__u8 *) acpi_rsdt)) {
120 printf("RSDT: %s\n", "bad checksum");
121 return;
122 }
123 if (acpi_xsdt && !acpi_sdt_check((__u8 *) acpi_xsdt)) {
124 printf("XSDT: %s\n", "bad checksum");
125 return;
126 }
127
128 if (acpi_xsdt) configure_via_xsdt();
129 else if (acpi_rsdt) configure_via_rsdt();
130
131}
132
133void configure_via_rsdt(void)
134{
135 int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u32);
136
137 for (i=0; i<cnt; i++) {
138 for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
139 struct acpi_sdt_header *h = (struct acpi_sdt_header *) (__native) acpi_rsdt->entry[i];
140
141 map_sdt(h);
142 if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) {
143 if (!acpi_sdt_check((__u8 *) h))
144 goto next;
145 *signature_map[j].sdt_ptr = h;
146 printf("%P: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
147 }
148 }
149next:
150 ;
151 }
152}
153
154void configure_via_xsdt(void)
155{
156 int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u64);
157
158 for (i=0; i<cnt; i++) {
159 for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
160 struct acpi_sdt_header *h = (struct acpi_sdt_header *) ((__address) acpi_rsdt->entry[i]);
161
162 map_sdt(h);
163 if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) {
164 if (!acpi_sdt_check((__u8 *) h))
165 goto next;
166 *signature_map[j].sdt_ptr = h;
167 printf("%P: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
168 }
169 }
170next:
171 ;
172 }
173
174}
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