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33 | 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 | |||
1702 | cejka | 29 | /** @addtogroup genarch |
30 | * @{ |
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31 | */ |
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1266 | jermar | 32 | /** |
33 | * @file madt.c |
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34 | * @brief Multiple APIC Description Table (MADT) parsing. |
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35 | */ |
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36 | |||
34 | jermar | 37 | #include <arch/types.h> |
129 | jermar | 38 | #include <typedefs.h> |
452 | decky | 39 | #include <genarch/acpi/acpi.h> |
40 | #include <genarch/acpi/madt.h> |
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34 | jermar | 41 | #include <arch/smp/apic.h> |
129 | jermar | 42 | #include <arch/smp/smp.h> |
127 | jermar | 43 | #include <panic.h> |
129 | jermar | 44 | #include <debug.h> |
45 | #include <config.h> |
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195 | vana | 46 | #include <print.h> |
814 | palkovsky | 47 | #include <mm/slab.h> |
310 | bondari | 48 | #include <memstr.h> |
331 | bondari | 49 | #include <sort.h> |
33 | jermar | 50 | |
51 | struct acpi_madt *acpi_madt = NULL; |
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34 | jermar | 52 | |
458 | decky | 53 | #ifdef CONFIG_SMP |
34 | jermar | 54 | |
512 | jermar | 55 | /** Standard ISA IRQ map; can be overriden by Interrupt Source Override entries of MADT. */ |
56 | int isa_irq_map[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; |
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57 | |||
310 | bondari | 58 | static void madt_l_apic_entry(struct madt_l_apic *la, __u32 index); |
59 | static void madt_io_apic_entry(struct madt_io_apic *ioa, __u32 index); |
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512 | jermar | 60 | static void madt_intr_src_ovrd_entry(struct madt_intr_src_ovrd *override, __u32 index); |
331 | bondari | 61 | static int madt_cmp(void * a, void * b); |
127 | jermar | 62 | |
63 | struct madt_l_apic *madt_l_apic_entries = NULL; |
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64 | struct madt_io_apic *madt_io_apic_entries = NULL; |
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65 | |||
370 | jermar | 66 | index_t madt_l_apic_entry_index = 0; |
67 | index_t madt_io_apic_entry_index = 0; |
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68 | count_t madt_l_apic_entry_cnt = 0; |
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69 | count_t madt_io_apic_entry_cnt = 0; |
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70 | count_t cpu_count = 0; |
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127 | jermar | 71 | |
310 | bondari | 72 | struct madt_apic_header * * madt_entries_index = NULL; |
73 | int madt_entries_index_cnt = 0; |
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74 | |||
34 | jermar | 75 | char *entry[] = { |
76 | "L_APIC", |
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77 | "IO_APIC", |
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78 | "INTR_SRC_OVRD", |
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79 | "NMI_SRC", |
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80 | "L_APIC_NMI", |
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81 | "L_APIC_ADDR_OVRD", |
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82 | "IO_SAPIC", |
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83 | "L_SAPIC", |
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84 | "PLATFORM_INTR_SRC" |
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85 | }; |
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86 | |||
129 | jermar | 87 | /* |
88 | * ACPI MADT Implementation of SMP configuration interface. |
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89 | */ |
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90 | static count_t madt_cpu_count(void); |
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91 | static bool madt_cpu_enabled(index_t i); |
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92 | static bool madt_cpu_bootstrap(index_t i); |
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93 | static __u8 madt_cpu_apic_id(index_t i); |
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512 | jermar | 94 | static int madt_irq_to_pin(int irq); |
129 | jermar | 95 | |
96 | struct smp_config_operations madt_config_operations = { |
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97 | .cpu_count = madt_cpu_count, |
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98 | .cpu_enabled = madt_cpu_enabled, |
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99 | .cpu_bootstrap = madt_cpu_bootstrap, |
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512 | jermar | 100 | .cpu_apic_id = madt_cpu_apic_id, |
101 | .irq_to_pin = madt_irq_to_pin |
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129 | jermar | 102 | }; |
103 | |||
512 | jermar | 104 | count_t madt_cpu_count(void) |
129 | jermar | 105 | { |
106 | return madt_l_apic_entry_cnt; |
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107 | } |
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108 | |||
512 | jermar | 109 | bool madt_cpu_enabled(index_t i) |
129 | jermar | 110 | { |
111 | ASSERT(i < madt_l_apic_entry_cnt); |
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310 | bondari | 112 | return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->flags & 0x1; |
113 | |||
129 | jermar | 114 | } |
115 | |||
512 | jermar | 116 | bool madt_cpu_bootstrap(index_t i) |
129 | jermar | 117 | { |
118 | ASSERT(i < madt_l_apic_entry_cnt); |
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310 | bondari | 119 | return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->apic_id == l_apic_id(); |
129 | jermar | 120 | } |
121 | |||
512 | jermar | 122 | __u8 madt_cpu_apic_id(index_t i) |
129 | jermar | 123 | { |
124 | ASSERT(i < madt_l_apic_entry_cnt); |
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310 | bondari | 125 | return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->apic_id; |
129 | jermar | 126 | } |
127 | |||
512 | jermar | 128 | int madt_irq_to_pin(int irq) |
129 | { |
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130 | ASSERT(irq < sizeof(isa_irq_map)/sizeof(int)); |
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131 | return isa_irq_map[irq]; |
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132 | } |
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133 | |||
331 | bondari | 134 | int madt_cmp(void * a, void * b) |
135 | { |
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349 | jermar | 136 | return |
137 | (((struct madt_apic_header *) a)->type > ((struct madt_apic_header *) b)->type) ? |
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138 | 1 : |
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139 | ((((struct madt_apic_header *) a)->type < ((struct madt_apic_header *) b)->type) ? -1 : 0); |
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331 | bondari | 140 | } |
141 | |||
34 | jermar | 142 | void acpi_madt_parse(void) |
143 | { |
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144 | struct madt_apic_header *end = (struct madt_apic_header *) (((__u8 *) acpi_madt) + acpi_madt->header.length); |
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310 | bondari | 145 | struct madt_apic_header *h; |
311 | bondari | 146 | |
147 | l_apic = (__u32 *) (__native) acpi_madt->l_apic_address; |
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34 | jermar | 148 | |
310 | bondari | 149 | /* calculate madt entries */ |
150 | for (h = &acpi_madt->apic_header[0]; h < end; h = (struct madt_apic_header *) (((__u8 *) h) + h->length)) { |
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151 | madt_entries_index_cnt++; |
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152 | } |
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127 | jermar | 153 | |
310 | bondari | 154 | /* create madt apic entries index array */ |
822 | palkovsky | 155 | madt_entries_index = (struct madt_apic_header * *) malloc(madt_entries_index_cnt * sizeof(struct madt_apic_header * *), FRAME_ATOMIC); |
156 | if (!madt_entries_index) |
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157 | panic("Memory allocation error."); |
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34 | jermar | 158 | |
310 | bondari | 159 | __u32 index = 0; |
160 | |||
161 | for (h = &acpi_madt->apic_header[0]; h < end; h = (struct madt_apic_header *) (((__u8 *) h) + h->length)) { |
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162 | madt_entries_index[index++] = h; |
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163 | } |
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164 | |||
331 | bondari | 165 | /* Quicksort MADT index structure */ |
166 | qsort(madt_entries_index, madt_entries_index_cnt, sizeof(__address), &madt_cmp); |
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310 | bondari | 167 | |
168 | /* Parse MADT entries */ |
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169 | for (index = 0; index < madt_entries_index_cnt - 1; index++) { |
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170 | h = madt_entries_index[index]; |
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34 | jermar | 171 | switch (h->type) { |
172 | case MADT_L_APIC: |
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310 | bondari | 173 | madt_l_apic_entry((struct madt_l_apic *) h, index); |
127 | jermar | 174 | break; |
34 | jermar | 175 | case MADT_IO_APIC: |
310 | bondari | 176 | madt_io_apic_entry((struct madt_io_apic *) h, index); |
127 | jermar | 177 | break; |
34 | jermar | 178 | case MADT_INTR_SRC_OVRD: |
512 | jermar | 179 | madt_intr_src_ovrd_entry((struct madt_intr_src_ovrd *) h, index); |
180 | break; |
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34 | jermar | 181 | case MADT_NMI_SRC: |
182 | case MADT_L_APIC_NMI: |
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183 | case MADT_L_APIC_ADDR_OVRD: |
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184 | case MADT_IO_SAPIC: |
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185 | case MADT_L_SAPIC: |
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186 | case MADT_PLATFORM_INTR_SRC: |
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1196 | cejka | 187 | printf("MADT: skipping %s entry (type=%zd)\n", entry[h->type], h->type); |
34 | jermar | 188 | break; |
189 | |||
190 | default: |
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191 | if (h->type >= MADT_RESERVED_SKIP_BEGIN && h->type <= MADT_RESERVED_SKIP_END) { |
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1196 | cejka | 192 | printf("MADT: skipping reserved entry (type=%zd)\n", h->type); |
34 | jermar | 193 | } |
194 | if (h->type >= MADT_RESERVED_OEM_BEGIN) { |
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1196 | cejka | 195 | printf("MADT: skipping OEM entry (type=%zd)\n", h->type); |
34 | jermar | 196 | } |
197 | break; |
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198 | } |
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310 | bondari | 199 | |
200 | |||
34 | jermar | 201 | } |
310 | bondari | 202 | |
34 | jermar | 203 | |
370 | jermar | 204 | if (cpu_count) |
205 | config.cpu_count = cpu_count; |
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34 | jermar | 206 | } |
127 | jermar | 207 | |
310 | bondari | 208 | |
209 | void madt_l_apic_entry(struct madt_l_apic *la, __u32 index) |
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127 | jermar | 210 | { |
310 | bondari | 211 | if (!madt_l_apic_entry_cnt++) { |
212 | madt_l_apic_entry_index = index; |
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213 | } |
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127 | jermar | 214 | |
215 | if (!(la->flags & 0x1)) { |
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216 | /* Processor is unusable, skip it. */ |
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217 | return; |
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218 | } |
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370 | jermar | 219 | |
220 | cpu_count++; |
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127 | jermar | 221 | apic_id_mask |= 1<<la->apic_id; |
222 | } |
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223 | |||
310 | bondari | 224 | void madt_io_apic_entry(struct madt_io_apic *ioa, __u32 index) |
127 | jermar | 225 | { |
226 | if (!madt_io_apic_entry_cnt++) { |
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310 | bondari | 227 | /* remember index of the first io apic entry */ |
228 | madt_io_apic_entry_index = index; |
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268 | palkovsky | 229 | io_apic = (__u32 *) (__native) ioa->io_apic_address; |
310 | bondari | 230 | } else { |
127 | jermar | 231 | /* currently not supported */ |
232 | return; |
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233 | } |
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234 | } |
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235 | |||
512 | jermar | 236 | void madt_intr_src_ovrd_entry(struct madt_intr_src_ovrd *override, __u32 index) |
237 | { |
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238 | ASSERT(override->source < sizeof(isa_irq_map)/sizeof(int)); |
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1196 | cejka | 239 | printf("MADT: ignoring %s entry: bus=%zd, source=%zd, global_int=%zd, flags=%#hX\n", |
515 | jermar | 240 | entry[override->header.type], override->bus, override->source, |
241 | override->global_int, override->flags); |
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512 | jermar | 242 | } |
127 | jermar | 243 | |
458 | decky | 244 | #endif /* CONFIG_SMP */ |
1702 | cejka | 245 | |
246 | /** @} |
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247 | */ |
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248 |