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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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 */
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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];
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65 
    if (sum)   
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        return 0; /* bad checksum */
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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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}
77 
 
1780 jermar 78 
int acpi_sdt_check(uint8_t *sdt)
33 jermar 79 
{
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    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];
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87 
    return !sum;
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}
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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)
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{
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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    }
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}
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 
        }
133 
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
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     * 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];
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                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