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29 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
29 | jermar | 3 | * All rights reserved. |
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 | |||
1888 | jermar | 29 | /** @addtogroup genarch |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | |||
1266 | jermar | 33 | /** |
1702 | cejka | 34 | * @file |
1266 | jermar | 35 | * @brief Advanced Configuration and Power Interface (ACPI) initialization. |
36 | */ |
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37 | |||
452 | decky | 38 | #include <genarch/acpi/acpi.h> |
39 | #include <genarch/acpi/madt.h> |
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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 |
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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; |
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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]; |
63 | |||
64 | if (sum) |
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65 | return 0; /* bad checksum */ |
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66 | |||
67 | if (r->revision == 0) |
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68 | return 1; /* ACPI 1.0 */ |
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69 | |||
2100 | decky | 70 | for (; i < r->length; i++) |
32 | jermar | 71 | sum += rsdp[i]; |
72 | |||
73 | return !sum; |
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74 | |||
75 | } |
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76 | |||
1780 | jermar | 77 | int acpi_sdt_check(uint8_t *sdt) |
33 | jermar | 78 | { |
79 | struct acpi_sdt_header *h = (struct acpi_sdt_header *) sdt; |
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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]; |
85 | |||
86 | return !sum; |
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87 | } |
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88 | |||
452 | decky | 89 | static void map_sdt(struct acpi_sdt_header *sdt) |
33 | jermar | 90 | { |
1780 | jermar | 91 | page_mapping_insert(AS_KERNEL, (uintptr_t) sdt, (uintptr_t) sdt, PAGE_NOT_CACHEABLE); |
92 | map_structure((uintptr_t) sdt, sdt->length); |
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33 | jermar | 93 | } |
94 | |||
452 | decky | 95 | static void configure_via_rsdt(void) |
96 | { |
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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++) { |
100 | for (j = 0; j < sizeof(signature_map) / sizeof(struct acpi_signature_map); j++) { |
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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); |
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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; |
107 | *signature_map[j].sdt_ptr = h; |
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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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111 | next: |
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112 | ; |
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113 | } |
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114 | } |
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115 | |||
116 | static void configure_via_xsdt(void) |
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117 | { |
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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++) { |
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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); |
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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; |
128 | *signature_map[j].sdt_ptr = h; |
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1735 | decky | 129 | printf("%#zx: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description); |
452 | decky | 130 | } |
131 | } |
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132 | next: |
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133 | ; |
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134 | } |
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135 | |||
136 | } |
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137 | |||
29 | jermar | 138 | void acpi_init(void) |
139 | { |
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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 |
147 | * 2. search 128K starting at 0xe0000 |
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148 | */ |
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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]; |
155 | goto rsdp_found; |
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156 | } |
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157 | } |
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158 | } |
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32 | jermar | 159 | |
125 | jermar | 160 | return; |
32 | jermar | 161 | |
162 | rsdp_found: |
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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); |
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33 | jermar | 167 | |
168 | if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt); |
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169 | if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt); |
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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; |
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174 | } |
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1780 | jermar | 175 | if (acpi_xsdt && !acpi_sdt_check((uint8_t *) acpi_xsdt)) { |
33 | jermar | 176 | printf("XSDT: %s\n", "bad checksum"); |
177 | return; |
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178 | } |
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179 | |||
180 | if (acpi_xsdt) configure_via_xsdt(); |
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181 | else if (acpi_rsdt) configure_via_rsdt(); |
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182 | |||
29 | jermar | 183 | } |
33 | jermar | 184 | |
1888 | jermar | 185 | /** @} |
1702 | cejka | 186 | */ |