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29 jermar 1
/*
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 * Copyright (C) 2005 Jakub Jermar
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 * 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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1702 cejka 29
 
1705 cejka 30
 /** @addtogroup genarch
1702 cejka 31
 * @{
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 */
33
 
1266 jermar 34
/**
1702 cejka 35
 * @file
1266 jermar 36
 * @brief   Advanced Configuration and Power Interface (ACPI) initialization.
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 */
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452 decky 39
#include <genarch/acpi/acpi.h>
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#include <genarch/acpi/madt.h>
32 jermar 41
#include <arch/bios/bios.h>
755 jermar 42
#include <mm/as.h>
33 jermar 43
#include <mm/page.h>
195 vana 44
#include <print.h>
33 jermar 45
 
32 jermar 46
#define RSDP_SIGNATURE      "RSD PTR "
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#define RSDP_REVISION_OFFS  15
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29 jermar 49
struct acpi_rsdp *acpi_rsdp = NULL;
33 jermar 50
struct acpi_rsdt *acpi_rsdt = NULL;
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struct acpi_xsdt *acpi_xsdt = NULL;
29 jermar 52
 
33 jermar 53
struct acpi_signature_map signature_map[] = {
1780 jermar 54
    { (uint8_t *)"APIC", (void *) &acpi_madt, "Multiple APIC Description Table" }
33 jermar 55
};
56
 
1780 jermar 57
static int rsdp_check(uint8_t *rsdp) {
32 jermar 58
    struct acpi_rsdp *r = (struct acpi_rsdp *) rsdp;
1780 jermar 59
    uint8_t sum = 0;
32 jermar 60
    int i;
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    for (i=0; i<20; i++)
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        sum += rsdp[i];
64
 
65
    if (sum)   
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        return 0; /* bad checksum */
67
 
68
    if (r->revision == 0)
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        return 1; /* ACPI 1.0 */
70
 
71
    for (; i<r->length; i++)
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        sum += rsdp[i];
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74
    return !sum;
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76
}
77
 
1780 jermar 78
int acpi_sdt_check(uint8_t *sdt)
33 jermar 79
{
80
    struct acpi_sdt_header *h = (struct acpi_sdt_header *) sdt;
1780 jermar 81
    uint8_t sum = 0;
33 jermar 82
    int i;
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84
    for (i=0; i<h->length; i++)
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        sum += sdt[i];
86
 
87
    return !sum;
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}
89
 
452 decky 90
static void map_sdt(struct acpi_sdt_header *sdt)
33 jermar 91
{
1780 jermar 92
    page_mapping_insert(AS_KERNEL, (uintptr_t) sdt, (uintptr_t) sdt, PAGE_NOT_CACHEABLE);
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    map_structure((uintptr_t) sdt, sdt->length);
33 jermar 94
}
95
 
452 decky 96
static void configure_via_rsdt(void)
97
{
1780 jermar 98
    int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(uint32_t);
452 decky 99
 
100
    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 102
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) (unative_t) acpi_rsdt->entry[i];
452 decky 103
 
104
            map_sdt(h);
1780 jermar 105
            if (*((uint32_t *) &h->signature[0])==*((uint32_t *) &signature_map[j].signature[0])) {
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                if (!acpi_sdt_check((uint8_t *) h))
452 decky 107
                    goto next;
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                *signature_map[j].sdt_ptr = h;
1735 decky 109
                printf("%#zx: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
452 decky 110
            }
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        }
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next:
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        ;
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    }
115
}
116
 
117
static void configure_via_xsdt(void)
118
{
1780 jermar 119
    int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(uint64_t);
452 decky 120
 
121
    for (i=0; i<cnt; i++) {
122
        for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
1780 jermar 123
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) ((uintptr_t) acpi_rsdt->entry[i]);
452 decky 124
 
125
            map_sdt(h);
1780 jermar 126
            if (*((uint32_t *) &h->signature[0])==*((uint32_t *) &signature_map[j].signature[0])) {
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                if (!acpi_sdt_check((uint8_t *) h))
452 decky 128
                    goto next;
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                *signature_map[j].sdt_ptr = h;
1735 decky 130
                printf("%#zx: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
452 decky 131
            }
132
        }
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next:
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        ;
135
    }
136
 
137
}
138
 
29 jermar 139
void acpi_init(void)
140
{
1780 jermar 141
    uint8_t *addr[2] = { NULL, (uint8_t *) PA2KA(0xe0000) };
125 jermar 142
    int i, j, length[2] = { 1024, 128*1024 };
1780 jermar 143
    uint64_t *sig = (uint64_t *) RSDP_SIGNATURE;
32 jermar 144
 
125 jermar 145
    /*
32 jermar 146
     * Find Root System Description Pointer
125 jermar 147
     * 1. search first 1K of EBDA
148
     * 2. search 128K starting at 0xe0000
149
     */
32 jermar 150
 
1780 jermar 151
    addr[0] = (uint8_t *) PA2KA(ebda);
32 jermar 152
    for (i = (ebda ? 0 : 1); i < 2; i++) {
125 jermar 153
        for (j = 0; j < length[i]; j += 16) {
1780 jermar 154
            if (*((uint64_t *) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) {
125 jermar 155
                acpi_rsdp = (struct acpi_rsdp *) &addr[i][j];
156
                goto rsdp_found;
157
            }
158
        }
159
    }
32 jermar 160
 
125 jermar 161
    return;
32 jermar 162
 
163
rsdp_found:
1735 decky 164
    printf("%#zx: ACPI Root System Description Pointer\n", acpi_rsdp);
125 jermar 165
 
1780 jermar 166
    acpi_rsdt = (struct acpi_rsdt *) (unative_t) acpi_rsdp->rsdt_address;
167
    if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((uintptr_t) acpi_rsdp->xsdt_address);
33 jermar 168
 
169
    if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt);
170
    if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt);  
171
 
1780 jermar 172
    if (acpi_rsdt && !acpi_sdt_check((uint8_t *) acpi_rsdt)) {
33 jermar 173
        printf("RSDT: %s\n", "bad checksum");
174
        return;
175
    }
1780 jermar 176
    if (acpi_xsdt && !acpi_sdt_check((uint8_t *) acpi_xsdt)) {
33 jermar 177
        printf("XSDT: %s\n", "bad checksum");
178
        return;
179
    }
180
 
181
    if (acpi_xsdt) configure_via_xsdt();
182
    else if (acpi_rsdt) configure_via_rsdt();
183
 
29 jermar 184
}
33 jermar 185
 
1702 cejka 186
 
187
 /** @}
188
 */
189