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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 | |||
34 | jermar | 29 | #include <arch/types.h> |
129 | jermar | 30 | #include <typedefs.h> |
33 | jermar | 31 | #include <arch/acpi/acpi.h> |
32 | #include <arch/acpi/madt.h> |
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34 | jermar | 33 | #include <arch/smp/apic.h> |
129 | jermar | 34 | #include <arch/smp/smp.h> |
127 | jermar | 35 | #include <mm/page.h> |
36 | #include <panic.h> |
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129 | jermar | 37 | #include <debug.h> |
38 | #include <config.h> |
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33 | jermar | 39 | |
40 | struct acpi_madt *acpi_madt = NULL; |
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34 | jermar | 41 | |
42 | #ifdef __SMP__ |
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43 | |||
127 | jermar | 44 | /* |
45 | * NOTE: it is currently not completely clear to the authors of SPARTAN whether |
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46 | * MADT can exist in such a form that entries of the same type are not consecutive. |
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47 | * Because of this uncertainity, some entry types are explicitly checked for |
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48 | * being consecutive with other entries of the same kind. |
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49 | */ |
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50 | |||
51 | static void madt_l_apic_entry(struct madt_l_apic *la, __u8 prev_type); |
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52 | static void madt_io_apic_entry(struct madt_io_apic *ioa, __u8 prev_type); |
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53 | |||
54 | struct madt_l_apic *madt_l_apic_entries = NULL; |
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55 | struct madt_io_apic *madt_io_apic_entries = NULL; |
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56 | |||
57 | int madt_l_apic_entry_cnt = 0; |
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58 | int madt_io_apic_entry_cnt = 0; |
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59 | |||
34 | jermar | 60 | char *entry[] = { |
61 | "L_APIC", |
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62 | "IO_APIC", |
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63 | "INTR_SRC_OVRD", |
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64 | "NMI_SRC", |
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65 | "L_APIC_NMI", |
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66 | "L_APIC_ADDR_OVRD", |
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67 | "IO_SAPIC", |
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68 | "L_SAPIC", |
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69 | "PLATFORM_INTR_SRC" |
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70 | }; |
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71 | |||
129 | jermar | 72 | /* |
73 | * ACPI MADT Implementation of SMP configuration interface. |
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74 | */ |
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75 | static count_t madt_cpu_count(void); |
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76 | static bool madt_cpu_enabled(index_t i); |
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77 | static bool madt_cpu_bootstrap(index_t i); |
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78 | static __u8 madt_cpu_apic_id(index_t i); |
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79 | |||
80 | struct smp_config_operations madt_config_operations = { |
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81 | .cpu_count = madt_cpu_count, |
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82 | .cpu_enabled = madt_cpu_enabled, |
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83 | .cpu_bootstrap = madt_cpu_bootstrap, |
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84 | .cpu_apic_id = madt_cpu_apic_id |
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85 | }; |
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86 | |||
87 | static count_t madt_cpu_count(void) |
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88 | { |
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89 | return madt_l_apic_entry_cnt; |
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90 | } |
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91 | |||
92 | static bool madt_cpu_enabled(index_t i) |
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93 | { |
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94 | ASSERT(i < madt_l_apic_entry_cnt); |
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95 | return madt_l_apic_entries[i].flags & 0x1; |
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96 | } |
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97 | |||
98 | static bool madt_cpu_bootstrap(index_t i) |
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99 | { |
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100 | ASSERT(i < madt_l_apic_entry_cnt); |
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101 | return madt_l_apic_entries[i].apic_id == l_apic_id(); |
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102 | } |
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103 | |||
104 | static __u8 madt_cpu_apic_id(index_t i) |
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105 | { |
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106 | ASSERT(i < madt_l_apic_entry_cnt); |
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107 | return madt_l_apic_entries[i].apic_id; |
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108 | } |
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109 | |||
34 | jermar | 110 | void acpi_madt_parse(void) |
111 | { |
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112 | struct madt_apic_header *end = (struct madt_apic_header *) (((__u8 *) acpi_madt) + acpi_madt->header.length); |
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113 | struct madt_apic_header *h = &acpi_madt->apic_header[0]; |
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127 | jermar | 114 | __u8 prev_type = 0; /* used to detect incosecutive entries */ |
34 | jermar | 115 | |
127 | jermar | 116 | |
34 | jermar | 117 | l_apic = (__u32 *) acpi_madt->l_apic_address; |
118 | |||
119 | while (h < end) { |
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120 | switch (h->type) { |
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121 | case MADT_L_APIC: |
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127 | jermar | 122 | madt_l_apic_entry((struct madt_l_apic *) h, prev_type); |
123 | break; |
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34 | jermar | 124 | case MADT_IO_APIC: |
127 | jermar | 125 | madt_io_apic_entry((struct madt_io_apic *) h, prev_type); |
126 | break; |
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34 | jermar | 127 | case MADT_INTR_SRC_OVRD: |
128 | case MADT_NMI_SRC: |
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129 | case MADT_L_APIC_NMI: |
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130 | case MADT_L_APIC_ADDR_OVRD: |
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131 | case MADT_IO_SAPIC: |
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132 | case MADT_L_SAPIC: |
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133 | case MADT_PLATFORM_INTR_SRC: |
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134 | printf("MADT: skipping %s entry (type=%d)\n", entry[h->type], h->type); |
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135 | break; |
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136 | |||
137 | default: |
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138 | if (h->type >= MADT_RESERVED_SKIP_BEGIN && h->type <= MADT_RESERVED_SKIP_END) { |
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139 | printf("MADT: skipping reserved entry (type=%d)\n", h->type); |
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140 | } |
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141 | if (h->type >= MADT_RESERVED_OEM_BEGIN) { |
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142 | printf("MADT: skipping OEM entry (type=%d)\n", h->type); |
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143 | } |
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144 | break; |
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145 | } |
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127 | jermar | 146 | prev_type = h->type; |
34 | jermar | 147 | h = (struct madt_apic_header *) (((__u8 *) h) + h->length); |
148 | } |
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149 | |||
129 | jermar | 150 | if (madt_l_apic_entry_cnt) |
151 | config.cpu_count = madt_l_apic_entry_cnt; |
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34 | jermar | 152 | } |
127 | jermar | 153 | |
154 | void madt_l_apic_entry(struct madt_l_apic *la, __u8 prev_type) |
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155 | { |
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156 | /* check for consecutiveness */ |
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157 | if (madt_l_apic_entry_cnt && prev_type != MADT_L_APIC) |
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158 | panic("%s entries are not consecuitve\n", entry[MADT_L_APIC]); |
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34 | jermar | 159 | |
127 | jermar | 160 | if (!madt_l_apic_entry_cnt++) |
161 | madt_l_apic_entries = la; |
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162 | |||
163 | if (!(la->flags & 0x1)) { |
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164 | /* Processor is unusable, skip it. */ |
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165 | return; |
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166 | } |
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167 | |||
168 | apic_id_mask |= 1<<la->apic_id; |
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169 | } |
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170 | |||
171 | void madt_io_apic_entry(struct madt_io_apic *ioa, __u8 prev_type) |
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172 | { |
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173 | /* check for consecutiveness */ |
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174 | if (madt_io_apic_entry_cnt && prev_type != MADT_IO_APIC) |
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175 | panic("%s entries are not consecuitve\n", entry[MADT_IO_APIC]); |
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176 | |||
177 | if (!madt_io_apic_entry_cnt++) { |
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178 | madt_io_apic_entries = ioa; |
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179 | io_apic = (__u32 *) ioa->io_apic_address; |
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180 | map_page_to_frame((__address) io_apic, (__address) io_apic, PAGE_NOT_CACHEABLE, 0); |
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181 | } |
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182 | else { |
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183 | /* currently not supported */ |
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184 | return; |
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185 | } |
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186 | } |
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187 | |||
188 | |||
34 | jermar | 189 | #endif /* __SMP__ */ |