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29 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2005 Jakub Jermar
29 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:
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 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
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 * - 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.
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 *
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
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * 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
 
1888 jermar 29
/** @addtogroup genarch
1702 cejka 30
 * @{
31
 */
32
 
1266 jermar 33
/**
1702 cejka 34
 * @file
1266 jermar 35
 * @brief   Advanced Configuration and Power Interface (ACPI) initialization.
36
 */
37
 
452 decky 38
#include <genarch/acpi/acpi.h>
39
#include <genarch/acpi/madt.h>
32 jermar 40
#include <arch/bios/bios.h>
755 jermar 41
#include <mm/as.h>
33 jermar 42
#include <mm/page.h>
195 vana 43
#include <print.h>
33 jermar 44
 
32 jermar 45
#define RSDP_SIGNATURE      "RSD PTR "
46
#define RSDP_REVISION_OFFS  15
47
 
29 jermar 48
struct acpi_rsdp *acpi_rsdp = NULL;
33 jermar 49
struct acpi_rsdt *acpi_rsdt = NULL;
50
struct acpi_xsdt *acpi_xsdt = NULL;
29 jermar 51
 
4337 svoboda 52
struct acpi_signature_map signature_map[] = {
53
    {
54
        (uint8_t *) "APIC",
55
        (void *) &acpi_madt,
56
        "Multiple APIC Description Table"
57
    }
33 jermar 58
};
59
 
1780 jermar 60
static int rsdp_check(uint8_t *rsdp) {
32 jermar 61
    struct acpi_rsdp *r = (struct acpi_rsdp *) rsdp;
1780 jermar 62
    uint8_t sum = 0;
2100 decky 63
    unsigned int i;
32 jermar 64
 
2100 decky 65
    for (i = 0; i < 20; i++)
2441 decky 66
        sum = (uint8_t) (sum + rsdp[i]);
32 jermar 67
 
68
    if (sum)   
69
        return 0; /* bad checksum */
70
 
71
    if (r->revision == 0)
72
        return 1; /* ACPI 1.0 */
73
 
2100 decky 74
    for (; i < r->length; i++)
2441 decky 75
        sum = (uint8_t) (sum + rsdp[i]);
32 jermar 76
 
77
    return !sum;
78
 
79
}
80
 
1780 jermar 81
int acpi_sdt_check(uint8_t *sdt)
33 jermar 82
{
83
    struct acpi_sdt_header *h = (struct acpi_sdt_header *) sdt;
1780 jermar 84
    uint8_t sum = 0;
2100 decky 85
    unsigned int i;
33 jermar 86
 
2100 decky 87
    for (i = 0; i < h->length; i++)
2441 decky 88
        sum = (uint8_t) (sum + sdt[i]);
33 jermar 89
 
90
    return !sum;
91
}
92
 
452 decky 93
static void map_sdt(struct acpi_sdt_header *sdt)
33 jermar 94
{
2222 decky 95
    page_mapping_insert(AS_KERNEL, (uintptr_t) sdt, (uintptr_t) sdt, PAGE_NOT_CACHEABLE | PAGE_WRITE);
1780 jermar 96
    map_structure((uintptr_t) sdt, sdt->length);
33 jermar 97
}
98
 
452 decky 99
static void configure_via_rsdt(void)
100
{
2100 decky 101
    unsigned int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header)) / sizeof(uint32_t);
452 decky 102
 
2100 decky 103
    for (i = 0; i < cnt; i++) {
104
        for (j = 0; j < sizeof(signature_map) / sizeof(struct acpi_signature_map); j++) {
1780 jermar 105
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) (unative_t) acpi_rsdt->entry[i];
452 decky 106
 
107
            map_sdt(h);
2100 decky 108
            if (*((uint32_t *) &h->signature[0]) == *((uint32_t *) &signature_map[j].signature[0])) {
1780 jermar 109
                if (!acpi_sdt_check((uint8_t *) h))
452 decky 110
                    goto next;
111
                *signature_map[j].sdt_ptr = h;
4337 svoboda 112
                LOG("%p: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
452 decky 113
            }
114
        }
115
next:
116
        ;
117
    }
118
}
119
 
120
static void configure_via_xsdt(void)
121
{
2100 decky 122
    unsigned int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header)) / sizeof(uint64_t);
452 decky 123
 
2100 decky 124
    for (i = 0; i < cnt; i++) {
125
        for (j = 0; j < sizeof(signature_map) / sizeof(struct acpi_signature_map); j++) {
1780 jermar 126
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) ((uintptr_t) acpi_rsdt->entry[i]);
452 decky 127
 
128
            map_sdt(h);
2100 decky 129
            if (*((uint32_t *) &h->signature[0]) == *((uint32_t *) &signature_map[j].signature[0])) {
1780 jermar 130
                if (!acpi_sdt_check((uint8_t *) h))
452 decky 131
                    goto next;
132
                *signature_map[j].sdt_ptr = h;
4337 svoboda 133
                LOG("%p: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
452 decky 134
            }
135
        }
136
next:
137
        ;
138
    }
139
 
140
}
141
 
29 jermar 142
void acpi_init(void)
143
{
1780 jermar 144
    uint8_t *addr[2] = { NULL, (uint8_t *) PA2KA(0xe0000) };
125 jermar 145
    int i, j, length[2] = { 1024, 128*1024 };
1780 jermar 146
    uint64_t *sig = (uint64_t *) RSDP_SIGNATURE;
32 jermar 147
 
125 jermar 148
    /*
32 jermar 149
     * Find Root System Description Pointer
125 jermar 150
     * 1. search first 1K of EBDA
151
     * 2. search 128K starting at 0xe0000
152
     */
32 jermar 153
 
1780 jermar 154
    addr[0] = (uint8_t *) PA2KA(ebda);
32 jermar 155
    for (i = (ebda ? 0 : 1); i < 2; i++) {
125 jermar 156
        for (j = 0; j < length[i]; j += 16) {
1780 jermar 157
            if (*((uint64_t *) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) {
125 jermar 158
                acpi_rsdp = (struct acpi_rsdp *) &addr[i][j];
159
                goto rsdp_found;
160
            }
161
        }
162
    }
32 jermar 163
 
125 jermar 164
    return;
32 jermar 165
 
166
rsdp_found:
4337 svoboda 167
    LOG("%p: ACPI Root System Description Pointer\n", acpi_rsdp);
125 jermar 168
 
1780 jermar 169
    acpi_rsdt = (struct acpi_rsdt *) (unative_t) acpi_rsdp->rsdt_address;
4691 svoboda 170
    if (acpi_rsdp->revision)
171
        acpi_xsdt = (struct acpi_xsdt *) ((uintptr_t) acpi_rsdp->xsdt_address);
33 jermar 172
 
4691 svoboda 173
    if (acpi_rsdt)
174
        map_sdt((struct acpi_sdt_header *) acpi_rsdt);
175
    if (acpi_xsdt)
176
        map_sdt((struct acpi_sdt_header *) acpi_xsdt);
33 jermar 177
 
1780 jermar 178
    if (acpi_rsdt && !acpi_sdt_check((uint8_t *) acpi_rsdt)) {
3149 svoboda 179
        printf("RSDT: bad checksum\n");
33 jermar 180
        return;
181
    }
1780 jermar 182
    if (acpi_xsdt && !acpi_sdt_check((uint8_t *) acpi_xsdt)) {
3149 svoboda 183
        printf("XSDT: bad checksum\n");
33 jermar 184
        return;
185
    }
186
 
4691 svoboda 187
    if (acpi_xsdt)
188
        configure_via_xsdt();
189
    else if (acpi_rsdt)
190
        configure_via_rsdt();
33 jermar 191
 
29 jermar 192
}
33 jermar 193
 
1888 jermar 194
/** @}
1702 cejka 195
 */