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| Rev | Author | Line No. | Line |
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| 29 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include <arch/acpi/acpi.h> |
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| 33 | jermar | 30 | #include <arch/acpi/madt.h> |
| 32 | jermar | 31 | #include <arch/bios/bios.h> |
| 29 | jermar | 32 | |
| 33 | jermar | 33 | #include <mm/page.h> |
| 195 | vana | 34 | #include <print.h> |
| 33 | jermar | 35 | |
| 32 | jermar | 36 | #define RSDP_SIGNATURE "RSD PTR " |
| 37 | #define RSDP_REVISION_OFFS 15 |
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| 38 | |||
| 29 | jermar | 39 | struct acpi_rsdp *acpi_rsdp = NULL; |
| 33 | jermar | 40 | struct acpi_rsdt *acpi_rsdt = NULL; |
| 41 | struct acpi_xsdt *acpi_xsdt = NULL; |
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| 29 | jermar | 42 | |
| 33 | jermar | 43 | struct acpi_signature_map signature_map[] = { |
| 44 | { "APIC", (struct acpi_sdt_header **) &acpi_madt, "Multiple APIC Description Table" } |
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| 45 | }; |
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| 46 | |||
| 32 | jermar | 47 | int rsdp_check(__u8 *rsdp) { |
| 48 | struct acpi_rsdp *r = (struct acpi_rsdp *) rsdp; |
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| 49 | __u8 sum = 0; |
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| 50 | int i; |
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| 51 | |||
| 52 | for (i=0; i<20; i++) |
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| 53 | sum += rsdp[i]; |
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| 54 | |||
| 55 | if (sum) |
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| 56 | return 0; /* bad checksum */ |
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| 57 | |||
| 58 | if (r->revision == 0) |
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| 59 | return 1; /* ACPI 1.0 */ |
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| 60 | |||
| 61 | for (; i<r->length; i++) |
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| 62 | sum += rsdp[i]; |
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| 63 | |||
| 64 | return !sum; |
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| 65 | |||
| 66 | } |
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| 67 | |||
| 33 | jermar | 68 | int acpi_sdt_check(__u8 *sdt) |
| 69 | { |
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| 70 | struct acpi_sdt_header *h = (struct acpi_sdt_header *) sdt; |
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| 71 | __u8 sum = 0; |
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| 72 | int i; |
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| 73 | |||
| 74 | for (i=0; i<h->length; i++) |
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| 75 | sum += sdt[i]; |
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| 76 | |||
| 77 | return !sum; |
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| 78 | } |
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| 79 | |||
| 80 | void map_sdt(struct acpi_sdt_header *sdt) |
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| 81 | { |
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| 82 | map_page_to_frame((__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0); |
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| 116 | jermar | 83 | map_structure((__address) sdt, sdt->length); |
| 33 | jermar | 84 | } |
| 85 | |||
| 29 | jermar | 86 | void acpi_init(void) |
| 87 | { |
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| 125 | jermar | 88 | __u8 *addr[2] = { NULL, (__u8 *) 0xe0000 }; |
| 89 | int i, j, length[2] = { 1024, 128*1024 }; |
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| 32 | jermar | 90 | __u64 *sig = (__u64 *) RSDP_SIGNATURE; |
| 91 | |||
| 125 | jermar | 92 | /* |
| 32 | jermar | 93 | * Find Root System Description Pointer |
| 125 | jermar | 94 | * 1. search first 1K of EBDA |
| 95 | * 2. search 128K starting at 0xe0000 |
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| 96 | */ |
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| 32 | jermar | 97 | |
| 98 | addr[0] = (__u8 *) ebda; |
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| 99 | for (i = (ebda ? 0 : 1); i < 2; i++) { |
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| 125 | jermar | 100 | for (j = 0; j < length[i]; j += 16) { |
| 101 | if (*((__u64 *) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) { |
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| 102 | acpi_rsdp = (struct acpi_rsdp *) &addr[i][j]; |
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| 103 | goto rsdp_found; |
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| 104 | } |
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| 105 | } |
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| 106 | } |
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| 32 | jermar | 107 | |
| 125 | jermar | 108 | return; |
| 32 | jermar | 109 | |
| 110 | rsdp_found: |
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| 125 | jermar | 111 | printf("%L: ACPI Root System Description Pointer\n", acpi_rsdp); |
| 112 | |||
| 33 | jermar | 113 | acpi_rsdt = (struct acpi_rsdt *) acpi_rsdp->rsdt_address; |
| 114 | if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((__address) acpi_rsdp->xsdt_address); |
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| 115 | |||
| 116 | if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt); |
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| 117 | if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt); |
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| 118 | |||
| 119 | if (acpi_rsdt && !acpi_sdt_check((__u8 *) acpi_rsdt)) { |
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| 120 | printf("RSDT: %s\n", "bad checksum"); |
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| 121 | return; |
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| 122 | } |
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| 123 | if (acpi_xsdt && !acpi_sdt_check((__u8 *) acpi_xsdt)) { |
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| 124 | printf("XSDT: %s\n", "bad checksum"); |
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| 125 | return; |
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| 126 | } |
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| 127 | |||
| 128 | if (acpi_xsdt) configure_via_xsdt(); |
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| 129 | else if (acpi_rsdt) configure_via_rsdt(); |
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| 130 | |||
| 29 | jermar | 131 | } |
| 33 | jermar | 132 | |
| 133 | void configure_via_rsdt(void) |
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| 134 | { |
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| 135 | int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u32); |
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| 136 | |||
| 137 | for (i=0; i<cnt; i++) { |
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| 138 | for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) { |
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| 139 | struct acpi_sdt_header *h = (struct acpi_sdt_header *) acpi_rsdt->entry[i]; |
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| 140 | |||
| 125 | jermar | 141 | map_sdt(h); |
| 33 | jermar | 142 | if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) { |
| 143 | if (!acpi_sdt_check((__u8 *) h)) |
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| 144 | goto next; |
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| 145 | *signature_map[j].sdt_ptr = h; |
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| 146 | printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description); |
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| 147 | } |
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| 148 | } |
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| 149 | next: |
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| 150 | ; |
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| 151 | } |
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| 152 | } |
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| 153 | |||
| 154 | void configure_via_xsdt(void) |
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| 155 | { |
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| 156 | int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u64); |
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| 157 | |||
| 158 | for (i=0; i<cnt; i++) { |
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| 159 | for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) { |
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| 160 | struct acpi_sdt_header *h = (struct acpi_sdt_header *) ((__address) acpi_rsdt->entry[i]); |
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| 161 | |||
| 162 | map_sdt(h); |
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| 163 | if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) { |
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| 164 | if (!acpi_sdt_check((__u8 *) h)) |
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| 165 | goto next; |
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| 166 | *signature_map[j].sdt_ptr = h; |
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| 167 | printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description); |
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| 168 | } |
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| 169 | } |
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| 170 | next: |
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| 171 | ; |
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| 172 | } |
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| 173 | |||
| 174 | } |