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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
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 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
13 
 *   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
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,
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 
 
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 
 
3707 decky 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;
3707 decky 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;
3707 decky 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:
3707 decky 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;
4569 jermar 170 
    if (acpi_rsdp->revision)
171 
        acpi_xsdt = (struct acpi_xsdt *) ((uintptr_t) acpi_rsdp->xsdt_address);
33 jermar 172 
 
4569 jermar 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)) {
3071 decky 179 
        printf("RSDT: bad checksum\n");
33 jermar 180 
        return;
181 
    }
1780 jermar 182 
    if (acpi_xsdt && !acpi_sdt_check((uint8_t *) acpi_xsdt)) {
3071 decky 183 
        printf("XSDT: bad checksum\n");
33 jermar 184 
        return;
185 
    }
186 
 
4569 jermar 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 
 */