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29 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2005 Jakub Jermar
29 jermar 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * 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
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1888 jermar 29
/** @addtogroup genarch
1702 cejka 30
 * @{
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 */
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1266 jermar 33
/**
1702 cejka 34
 * @file
1266 jermar 35
 * @brief   Advanced Configuration and Power Interface (ACPI) initialization.
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 */
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452 decky 38
#include <genarch/acpi/acpi.h>
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#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 "
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#define RSDP_REVISION_OFFS  15
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29 jermar 48
struct acpi_rsdp *acpi_rsdp = NULL;
33 jermar 49
struct acpi_rsdt *acpi_rsdt = NULL;
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struct acpi_xsdt *acpi_xsdt = NULL;
29 jermar 51
 
33 jermar 52
struct acpi_signature_map signature_map[] = {
1780 jermar 53
    { (uint8_t *)"APIC", (void *) &acpi_madt, "Multiple APIC Description Table" }
33 jermar 54
};
55
 
1780 jermar 56
static int rsdp_check(uint8_t *rsdp) {
32 jermar 57
    struct acpi_rsdp *r = (struct acpi_rsdp *) rsdp;
1780 jermar 58
    uint8_t sum = 0;
2100 decky 59
    unsigned int i;
32 jermar 60
 
2100 decky 61
    for (i = 0; i < 20; i++)
32 jermar 62
        sum += rsdp[i];
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64
    if (sum)   
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        return 0; /* bad checksum */
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67
    if (r->revision == 0)
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        return 1; /* ACPI 1.0 */
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2100 decky 70
    for (; i < r->length; i++)
32 jermar 71
        sum += rsdp[i];
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73
    return !sum;
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75
}
76
 
1780 jermar 77
int acpi_sdt_check(uint8_t *sdt)
33 jermar 78
{
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    struct acpi_sdt_header *h = (struct acpi_sdt_header *) sdt;
1780 jermar 80
    uint8_t sum = 0;
2100 decky 81
    unsigned int i;
33 jermar 82
 
2100 decky 83
    for (i = 0; i < h->length; i++)
33 jermar 84
        sum += sdt[i];
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86
    return !sum;
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}
88
 
452 decky 89
static void map_sdt(struct acpi_sdt_header *sdt)
33 jermar 90
{
2222 decky 91
    page_mapping_insert(AS_KERNEL, (uintptr_t) sdt, (uintptr_t) sdt, PAGE_NOT_CACHEABLE | PAGE_WRITE);
1780 jermar 92
    map_structure((uintptr_t) sdt, sdt->length);
33 jermar 93
}
94
 
452 decky 95
static void configure_via_rsdt(void)
96
{
2100 decky 97
    unsigned int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header)) / sizeof(uint32_t);
452 decky 98
 
2100 decky 99
    for (i = 0; i < cnt; i++) {
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        for (j = 0; j < sizeof(signature_map) / sizeof(struct acpi_signature_map); j++) {
1780 jermar 101
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) (unative_t) acpi_rsdt->entry[i];
452 decky 102
 
103
            map_sdt(h);
2100 decky 104
            if (*((uint32_t *) &h->signature[0]) == *((uint32_t *) &signature_map[j].signature[0])) {
1780 jermar 105
                if (!acpi_sdt_check((uint8_t *) h))
452 decky 106
                    goto next;
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                *signature_map[j].sdt_ptr = h;
1735 decky 108
                printf("%#zx: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
452 decky 109
            }
110
        }
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next:
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        ;
113
    }
114
}
115
 
116
static void configure_via_xsdt(void)
117
{
2100 decky 118
    unsigned int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header)) / sizeof(uint64_t);
452 decky 119
 
2100 decky 120
    for (i = 0; i < cnt; i++) {
121
        for (j = 0; j < sizeof(signature_map) / sizeof(struct acpi_signature_map); j++) {
1780 jermar 122
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) ((uintptr_t) acpi_rsdt->entry[i]);
452 decky 123
 
124
            map_sdt(h);
2100 decky 125
            if (*((uint32_t *) &h->signature[0]) == *((uint32_t *) &signature_map[j].signature[0])) {
1780 jermar 126
                if (!acpi_sdt_check((uint8_t *) h))
452 decky 127
                    goto next;
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                *signature_map[j].sdt_ptr = h;
1735 decky 129
                printf("%#zx: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
452 decky 130
            }
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        }
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next:
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        ;
134
    }
135
 
136
}
137
 
29 jermar 138
void acpi_init(void)
139
{
1780 jermar 140
    uint8_t *addr[2] = { NULL, (uint8_t *) PA2KA(0xe0000) };
125 jermar 141
    int i, j, length[2] = { 1024, 128*1024 };
1780 jermar 142
    uint64_t *sig = (uint64_t *) RSDP_SIGNATURE;
32 jermar 143
 
125 jermar 144
    /*
32 jermar 145
     * Find Root System Description Pointer
125 jermar 146
     * 1. search first 1K of EBDA
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     * 2. search 128K starting at 0xe0000
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     */
32 jermar 149
 
1780 jermar 150
    addr[0] = (uint8_t *) PA2KA(ebda);
32 jermar 151
    for (i = (ebda ? 0 : 1); i < 2; i++) {
125 jermar 152
        for (j = 0; j < length[i]; j += 16) {
1780 jermar 153
            if (*((uint64_t *) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) {
125 jermar 154
                acpi_rsdp = (struct acpi_rsdp *) &addr[i][j];
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                goto rsdp_found;
156
            }
157
        }
158
    }
32 jermar 159
 
125 jermar 160
    return;
32 jermar 161
 
162
rsdp_found:
1735 decky 163
    printf("%#zx: ACPI Root System Description Pointer\n", acpi_rsdp);
125 jermar 164
 
1780 jermar 165
    acpi_rsdt = (struct acpi_rsdt *) (unative_t) acpi_rsdp->rsdt_address;
166
    if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((uintptr_t) acpi_rsdp->xsdt_address);
33 jermar 167
 
168
    if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt);
169
    if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt);  
170
 
1780 jermar 171
    if (acpi_rsdt && !acpi_sdt_check((uint8_t *) acpi_rsdt)) {
33 jermar 172
        printf("RSDT: %s\n", "bad checksum");
173
        return;
174
    }
1780 jermar 175
    if (acpi_xsdt && !acpi_sdt_check((uint8_t *) acpi_xsdt)) {
33 jermar 176
        printf("XSDT: %s\n", "bad checksum");
177
        return;
178
    }
179
 
180
    if (acpi_xsdt) configure_via_xsdt();
181
    else if (acpi_rsdt) configure_via_rsdt();
182
 
29 jermar 183
}
33 jermar 184
 
1888 jermar 185
/** @}
1702 cejka 186
 */