Subversion Repositories HelenOS

Rev

Rev 687 | Rev 756 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
29 jermar 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
 
452 decky 29
#include <genarch/acpi/acpi.h>
30
#include <genarch/acpi/madt.h>
32 jermar 31
#include <arch/bios/bios.h>
755 jermar 32
#include <mm/as.h>
33 jermar 33
#include <mm/page.h>
195 vana 34
#include <print.h>
33 jermar 35
 
32 jermar 36
#define RSDP_SIGNATURE      "RSD PTR "
37
#define RSDP_REVISION_OFFS  15
38
 
29 jermar 39
struct acpi_rsdp *acpi_rsdp = NULL;
33 jermar 40
struct acpi_rsdt *acpi_rsdt = NULL;
41
struct acpi_xsdt *acpi_xsdt = NULL;
29 jermar 42
 
33 jermar 43
struct acpi_signature_map signature_map[] = {
659 jermar 44
    { (__u8 *)"APIC", (void *) &acpi_madt, "Multiple APIC Description Table" }
33 jermar 45
};
46
 
452 decky 47
static int rsdp_check(__u8 *rsdp) {
32 jermar 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
 
33 jermar 68
int 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
 
452 decky 80
static void map_sdt(struct acpi_sdt_header *sdt)
33 jermar 81
{
755 jermar 82
    page_mapping_insert(AS_KERNEL, (__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0);
116 jermar 83
    map_structure((__address) sdt, sdt->length);
33 jermar 84
}
85
 
452 decky 86
static void configure_via_rsdt(void)
87
{
88
    int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u32);
89
 
90
    for (i=0; i<cnt; i++) {
91
        for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
92
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) (__native) acpi_rsdt->entry[i];
93
 
94
            map_sdt(h);
95
            if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) {
96
                if (!acpi_sdt_check((__u8 *) h))
97
                    goto next;
98
                *signature_map[j].sdt_ptr = h;
99
                printf("%P: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
100
            }
101
        }
102
next:
103
        ;
104
    }
105
}
106
 
107
static void configure_via_xsdt(void)
108
{
109
    int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u64);
110
 
111
    for (i=0; i<cnt; i++) {
112
        for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
113
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) ((__address) acpi_rsdt->entry[i]);
114
 
115
            map_sdt(h);
116
            if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) {
117
                if (!acpi_sdt_check((__u8 *) h))
118
                    goto next;
119
                *signature_map[j].sdt_ptr = h;
120
                printf("%P: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
121
            }
122
        }
123
next:
124
        ;
125
    }
126
 
127
}
128
 
29 jermar 129
void acpi_init(void)
130
{
278 palkovsky 131
    __u8 *addr[2] = { NULL, (__u8 *) PA2KA(0xe0000) };
125 jermar 132
    int i, j, length[2] = { 1024, 128*1024 };
32 jermar 133
    __u64 *sig = (__u64 *) RSDP_SIGNATURE;
134
 
125 jermar 135
    /*
32 jermar 136
     * Find Root System Description Pointer
125 jermar 137
     * 1. search first 1K of EBDA
138
     * 2. search 128K starting at 0xe0000
139
     */
32 jermar 140
 
268 palkovsky 141
    addr[0] = (__u8 *) PA2KA(ebda);
32 jermar 142
    for (i = (ebda ? 0 : 1); i < 2; i++) {
125 jermar 143
        for (j = 0; j < length[i]; j += 16) {
144
            if (*((__u64 *) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) {
145
                acpi_rsdp = (struct acpi_rsdp *) &addr[i][j];
146
                goto rsdp_found;
147
            }
148
        }
149
    }
32 jermar 150
 
125 jermar 151
    return;
32 jermar 152
 
153
rsdp_found:
347 jermar 154
    printf("%P: ACPI Root System Description Pointer\n", acpi_rsdp);
125 jermar 155
 
268 palkovsky 156
    acpi_rsdt = (struct acpi_rsdt *) (__native) acpi_rsdp->rsdt_address;
33 jermar 157
    if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((__address) acpi_rsdp->xsdt_address);
158
 
159
    if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt);
160
    if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt);  
161
 
162
    if (acpi_rsdt && !acpi_sdt_check((__u8 *) acpi_rsdt)) {
163
        printf("RSDT: %s\n", "bad checksum");
164
        return;
165
    }
166
    if (acpi_xsdt && !acpi_sdt_check((__u8 *) acpi_xsdt)) {
167
        printf("XSDT: %s\n", "bad checksum");
168
        return;
169
    }
170
 
171
    if (acpi_xsdt) configure_via_xsdt();
172
    else if (acpi_rsdt) configure_via_rsdt();
173
 
29 jermar 174
}
33 jermar 175