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Rev | Author | Line No. | Line |
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1 | jermar | 1 | /* |
2 | * Copyright (C) 2001-2004 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 | #ifdef __SMP__ |
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30 | |||
31 | #include <arch/pm.h> |
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32 | #include <config.h> |
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33 | #include <print.h> |
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34 | #include <panic.h> |
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11 | jermar | 35 | #include <arch/smp/mp.h> |
36 | #include <arch/smp/ap.h> |
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37 | #include <arch/smp/apic.h> |
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1 | jermar | 38 | #include <func.h> |
39 | #include <arch/types.h> |
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40 | #include <typedefs.h> |
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41 | #include <synch/waitq.h> |
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42 | #include <time/delay.h> |
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43 | #include <mm/heap.h> |
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44 | #include <mm/page.h> |
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45 | #include <mm/frame.h> |
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46 | #include <cpu.h> |
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47 | #include <arch/i8259.h> |
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48 | #include <arch/asm.h> |
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29 | jermar | 49 | #include <arch/acpi/madt.h> |
1 | jermar | 50 | |
51 | /* |
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52 | * Multi-Processor Specification detection code. |
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53 | */ |
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54 | |||
55 | #define FS_SIGNATURE 0x5f504d5f |
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56 | #define CT_SIGNATURE 0x504d4350 |
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57 | |||
58 | int mp_fs_check(__u8 *base); |
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59 | int mp_ct_check(void); |
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60 | |||
61 | int configure_via_ct(void); |
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62 | int configure_via_default(__u8 n); |
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63 | |||
64 | int ct_processor_entry(struct __processor_entry *pr); |
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65 | void ct_bus_entry(struct __bus_entry *bus); |
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66 | void ct_io_apic_entry(struct __io_apic_entry *ioa); |
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67 | void ct_io_intr_entry(struct __io_intr_entry *iointr); |
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68 | void ct_l_intr_entry(struct __l_intr_entry *lintr); |
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69 | |||
70 | void ct_extended_entries(void); |
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71 | |||
72 | static struct __mpfs *fs; |
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73 | static struct __mpct *ct; |
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74 | |||
75 | struct __processor_entry *processor_entries = NULL; |
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76 | struct __bus_entry *bus_entries = NULL; |
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77 | struct __io_apic_entry *io_apic_entries = NULL; |
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78 | struct __io_intr_entry *io_intr_entries = NULL; |
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79 | struct __l_intr_entry *l_intr_entries = NULL; |
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80 | |||
81 | int processor_entry_cnt = 0; |
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82 | int bus_entry_cnt = 0; |
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83 | int io_apic_entry_cnt = 0; |
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84 | int io_intr_entry_cnt = 0; |
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85 | int l_intr_entry_cnt = 0; |
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86 | |||
87 | waitq_t ap_completion_wq; |
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88 | waitq_t kmp_completion_wq; |
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89 | |||
90 | /* |
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91 | * Used to check the integrity of the MP Floating Structure. |
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92 | */ |
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93 | int mp_fs_check(__u8 *base) |
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94 | { |
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95 | int i; |
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96 | __u8 sum; |
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97 | |||
98 | for (i = 0, sum = 0; i < 16; i++) |
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99 | sum += base[i]; |
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100 | |||
101 | return !sum; |
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102 | } |
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103 | |||
104 | /* |
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105 | * Used to check the integrity of the MP Configuration Table. |
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106 | */ |
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107 | int mp_ct_check(void) |
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108 | { |
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109 | __u8 *base = (__u8 *) ct; |
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110 | __u8 *ext = base + ct->base_table_length; |
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111 | __u8 sum; |
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112 | int i; |
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113 | |||
114 | /* count the checksum for the base table */ |
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115 | for (i=0,sum=0; i < ct->base_table_length; i++) |
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116 | sum += base[i]; |
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117 | |||
118 | if (sum) |
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119 | return 0; |
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120 | |||
121 | /* count the checksum for the extended table */ |
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122 | for (i=0,sum=0; i < ct->ext_table_length; i++) |
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123 | sum += ext[i]; |
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124 | |||
12 | jermar | 125 | return sum == ct->ext_table_checksum; |
1 | jermar | 126 | } |
127 | |||
128 | void mp_init(void) |
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129 | { |
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130 | __address addr, frame; |
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131 | int cnt, n; |
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132 | |||
133 | |||
134 | /* |
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135 | * First place to search the MP Floating Pointer Structure is the Extended |
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136 | * BIOS Data Area. We have to read EBDA segment address from the BIOS Data |
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137 | * Area. Unfortunatelly, this memory is in page 0, which has intentionally no |
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138 | * mapping. |
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139 | */ |
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140 | frame = frame_alloc(FRAME_KA); |
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141 | map_page_to_frame(frame,0,PAGE_CACHEABLE,0); |
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142 | addr = *((__u16 *) (frame + 0x40e)) * 16; |
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143 | map_page_to_frame(frame,frame,PAGE_CACHEABLE,0); |
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144 | frame_free(frame); |
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145 | |||
146 | /* |
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147 | * EBDA can be undefined. In that case addr would be 0. |
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148 | */ |
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149 | if (addr >= 0x1000) { |
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150 | cnt = 1024; |
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151 | while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) { |
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152 | if (mp_fs_check((__u8 *) addr)) |
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153 | goto fs_found; |
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154 | addr++; |
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155 | cnt--; |
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156 | } |
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157 | } |
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158 | |||
159 | /* |
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160 | * Second place where the MP Floating Pointer Structure may live is the last |
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161 | * kilobyte of base memory. |
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162 | */ |
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163 | addr = 639*1024; |
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164 | cnt = 1024; |
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165 | while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) { |
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166 | if (mp_fs_check((__u8 *) addr)) |
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167 | goto fs_found; |
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168 | addr++; |
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169 | cnt--; |
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170 | } |
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171 | |||
172 | /* |
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173 | * As the last resort, MP Floating Pointer Structure is searched in the BIOS |
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174 | * ROM. |
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175 | */ |
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176 | addr = 0xf0000; |
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177 | cnt = 64*1024; |
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178 | while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) { |
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179 | if (mp_fs_check((__u8 *) addr)) |
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180 | goto fs_found; |
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181 | addr++; |
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182 | cnt--; |
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183 | } |
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184 | |||
185 | return; |
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186 | |||
187 | fs_found: |
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188 | printf("%L: MP Floating Pointer Structure\n", addr); |
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189 | |||
190 | fs = (struct __mpfs *) addr; |
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191 | frame_not_free((__address) fs); |
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192 | |||
193 | if (fs->config_type == 0 && fs->configuration_table) { |
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194 | if (fs->mpfib2 >> 7) { |
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195 | printf("mp_init: PIC mode not supported\n"); |
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196 | return; |
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197 | } |
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198 | |||
199 | ct = fs->configuration_table; |
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200 | frame_not_free((__address) ct); |
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201 | config.cpu_count = configure_via_ct(); |
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202 | } |
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203 | else |
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204 | config.cpu_count = configure_via_default(fs->config_type); |
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205 | |||
206 | if (config.cpu_count > 1) { |
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207 | map_page_to_frame((__address) l_apic, (__address) l_apic, PAGE_NOT_CACHEABLE, 0); |
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208 | } |
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209 | |||
210 | |||
211 | /* |
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212 | * Must be initialized outside the kmp thread, since it is waited |
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213 | * on before the kmp thread is created. |
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214 | */ |
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215 | waitq_initialize(&kmp_completion_wq); |
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216 | return; |
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217 | } |
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218 | |||
219 | int configure_via_ct(void) |
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220 | { |
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221 | __u8 *cur; |
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222 | int i, cnt; |
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223 | |||
224 | if (ct->signature != CT_SIGNATURE) { |
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225 | printf("configure_via_ct: bad ct->signature\n"); |
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226 | return 1; |
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227 | } |
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228 | if (!mp_ct_check()) { |
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229 | printf("configure_via_ct: bad ct checksum\n"); |
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230 | return 1; |
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231 | } |
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232 | if (ct->oem_table) { |
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233 | printf("configure_via_ct: ct->oem_table not supported\n"); |
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234 | return 1; |
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235 | } |
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236 | |||
237 | l_apic = ct->l_apic; |
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238 | |||
239 | cnt = 0; |
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240 | cur = &ct->base_table[0]; |
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241 | for (i=0; i < ct->entry_count; i++) { |
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242 | switch (*cur) { |
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243 | /* Processor entry */ |
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244 | case 0: |
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245 | processor_entries = processor_entries ? processor_entries : (struct __processor_entry *) cur; |
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246 | processor_entry_cnt++; |
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247 | cnt += ct_processor_entry((struct __processor_entry *) cur); |
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248 | cur += 20; |
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249 | break; |
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250 | |||
251 | /* Bus entry */ |
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252 | case 1: |
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253 | bus_entries = bus_entries ? bus_entries : (struct __bus_entry *) cur; |
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254 | bus_entry_cnt++; |
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255 | ct_bus_entry((struct __bus_entry *) cur); |
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256 | cur += 8; |
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257 | break; |
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258 | |||
259 | /* I/O Apic */ |
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260 | case 2: |
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261 | io_apic_entries = io_apic_entries ? io_apic_entries : (struct __io_apic_entry *) cur; |
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262 | io_apic_entry_cnt++; |
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263 | ct_io_apic_entry((struct __io_apic_entry *) cur); |
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264 | cur += 8; |
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265 | break; |
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266 | |||
267 | /* I/O Interrupt Assignment */ |
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268 | case 3: |
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269 | io_intr_entries = io_intr_entries ? io_intr_entries : (struct __io_intr_entry *) cur; |
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270 | io_intr_entry_cnt++; |
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271 | ct_io_intr_entry((struct __io_intr_entry *) cur); |
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272 | cur += 8; |
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273 | break; |
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274 | |||
275 | /* Local Interrupt Assignment */ |
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276 | case 4: |
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277 | l_intr_entries = l_intr_entries ? l_intr_entries : (struct __l_intr_entry *) cur; |
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278 | l_intr_entry_cnt++; |
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279 | ct_l_intr_entry((struct __l_intr_entry *) cur); |
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280 | cur += 8; |
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281 | break; |
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282 | |||
283 | default: |
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284 | /* |
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285 | * Something is wrong. Fallback to UP mode. |
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286 | */ |
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287 | |||
288 | printf("configure_via_ct: ct badness\n"); |
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289 | return 1; |
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290 | } |
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291 | } |
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292 | |||
293 | /* |
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294 | * Process extended entries. |
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295 | */ |
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296 | ct_extended_entries(); |
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297 | return cnt; |
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298 | } |
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299 | |||
300 | int configure_via_default(__u8 n) |
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301 | { |
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302 | /* |
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303 | * Not yet implemented. |
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304 | */ |
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305 | printf("configure_via_default: not supported\n"); |
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306 | return 1; |
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307 | } |
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308 | |||
309 | |||
310 | int ct_processor_entry(struct __processor_entry *pr) |
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311 | { |
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312 | /* |
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313 | * Ignore processors which are not marked enabled. |
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314 | */ |
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315 | if ((pr->cpu_flags & (1<<0)) == 0) |
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316 | return 0; |
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317 | |||
318 | apic_id_mask |= (1<<pr->l_apic_id); |
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319 | return 1; |
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320 | } |
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321 | |||
322 | void ct_bus_entry(struct __bus_entry *bus) |
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323 | { |
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324 | #ifdef MPCT_VERBOSE |
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325 | char buf[7]; |
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326 | memcopy((__address) bus->bus_type, (__address) buf,6); |
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327 | buf[6] = 0; |
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328 | printf("bus%d: %s\n", bus->bus_id, buf); |
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329 | #endif |
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330 | } |
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331 | |||
332 | void ct_io_apic_entry(struct __io_apic_entry *ioa) |
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333 | { |
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334 | static int io_apic_count = 0; |
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335 | |||
336 | /* this ioapic is marked unusable */ |
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337 | if (ioa->io_apic_flags & 1 == 0) |
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338 | return; |
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339 | |||
340 | if (io_apic_count++ > 0) { |
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341 | /* |
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342 | * Multiple IO APIC's are currently not supported. |
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343 | */ |
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344 | return; |
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345 | } |
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346 | |||
347 | map_page_to_frame((__address) ioa->io_apic, (__address) ioa->io_apic, PAGE_NOT_CACHEABLE, 0); |
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348 | |||
349 | io_apic = ioa->io_apic; |
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350 | } |
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351 | |||
352 | //#define MPCT_VERBOSE |
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353 | void ct_io_intr_entry(struct __io_intr_entry *iointr) |
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354 | { |
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355 | #ifdef MPCT_VERBOSE |
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356 | switch (iointr->intr_type) { |
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357 | case 0: printf("INT"); break; |
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358 | case 1: printf("NMI"); break; |
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359 | case 2: printf("SMI"); break; |
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360 | case 3: printf("ExtINT"); break; |
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361 | } |
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362 | putchar(','); |
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363 | switch (iointr->poel&3) { |
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364 | case 0: printf("bus-like"); break; |
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365 | case 1: printf("active high"); break; |
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366 | case 2: printf("reserved"); break; |
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367 | case 3: printf("active low"); break; |
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368 | } |
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369 | putchar(','); |
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370 | switch ((iointr->poel>>2)&3) { |
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371 | case 0: printf("bus-like"); break; |
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372 | case 1: printf("edge-triggered"); break; |
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373 | case 2: printf("reserved"); break; |
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374 | case 3: printf("level-triggered"); break; |
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375 | } |
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376 | putchar(','); |
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377 | printf("bus%d,irq%d", iointr->src_bus_id, iointr->src_bus_irq); |
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378 | putchar(','); |
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379 | printf("io_apic%d,pin%d", iointr->dst_io_apic_id, iointr->dst_io_apic_pin); |
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380 | putchar('\n'); |
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381 | #endif |
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382 | } |
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383 | |||
384 | void ct_l_intr_entry(struct __l_intr_entry *lintr) |
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385 | { |
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386 | #ifdef MPCT_VERBOSE |
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387 | switch (lintr->intr_type) { |
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388 | case 0: printf("INT"); break; |
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389 | case 1: printf("NMI"); break; |
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390 | case 2: printf("SMI"); break; |
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391 | case 3: printf("ExtINT"); break; |
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392 | } |
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393 | putchar(','); |
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394 | switch (lintr->poel&3) { |
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395 | case 0: printf("bus-like"); break; |
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396 | case 1: printf("active high"); break; |
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397 | case 2: printf("reserved"); break; |
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398 | case 3: printf("active low"); break; |
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399 | } |
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400 | putchar(','); |
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401 | switch ((lintr->poel>>2)&3) { |
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402 | case 0: printf("bus-like"); break; |
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403 | case 1: printf("edge-triggered"); break; |
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404 | case 2: printf("reserved"); break; |
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405 | case 3: printf("level-triggered"); break; |
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406 | } |
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407 | putchar(','); |
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408 | printf("bus%d,irq%d", lintr->src_bus_id, lintr->src_bus_irq); |
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409 | putchar(','); |
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410 | printf("l_apic%d,pin%d", lintr->dst_l_apic_id, lintr->dst_l_apic_pin); |
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411 | putchar('\n'); |
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412 | #endif |
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413 | } |
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414 | |||
415 | void ct_extended_entries(void) |
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416 | { |
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13 | jermar | 417 | __u8 *ext = (__u8 *) ct + ct->base_table_length; |
418 | __u8 *cur; |
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419 | |||
420 | for (cur = ext; cur < ext + ct->ext_table_length; cur += cur[CT_EXT_ENTRY_LEN]) { |
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421 | switch (cur[CT_EXT_ENTRY_TYPE]) { |
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422 | default: |
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423 | printf("%X: skipping MP Configuration Table extended entry type %d\n", cur, cur[CT_EXT_ENTRY_TYPE]); |
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424 | break; |
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425 | } |
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426 | } |
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1 | jermar | 427 | } |
428 | |||
429 | /* |
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430 | * Kernel thread for bringing up application processors. It becomes clear |
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431 | * that we need an arrangement like this (AP's being initialized by a kernel |
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432 | * thread), for a thread has its dedicated stack. (The stack used during the |
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433 | * BSP initialization (prior the very first call to scheduler()) will be used |
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434 | * as an initialization stack for each AP.) |
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435 | */ |
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436 | void kmp(void *arg) |
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437 | { |
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438 | struct __processor_entry *pr; |
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439 | __address src, dst; |
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440 | __address frame; |
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441 | int i; |
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442 | |||
443 | waitq_initialize(&ap_completion_wq); |
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444 | |||
445 | /* |
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446 | * Processor entries immediately follow the configuration table header. |
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447 | */ |
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448 | pr = processor_entries; |
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449 | |||
450 | /* |
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451 | * Grab a frame and map its address to page 0. This is a hack which |
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452 | * accesses data in frame 0. Note that page 0 is not present because |
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453 | * of nil reference bug catching. |
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454 | */ |
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455 | frame = frame_alloc(FRAME_KA); |
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456 | map_page_to_frame(frame,0,PAGE_CACHEABLE,0); |
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457 | |||
458 | /* |
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459 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
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460 | */ |
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461 | *((__u16 *) (frame + 0x467+0)) = ((__address) ap_boot) >> 4; /* segment */ |
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462 | *((__u16 *) (frame + 0x467+2)) = 0x0; /* offset */ |
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463 | |||
464 | /* |
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465 | * Give back the borrowed frame and restore identity mapping for it. |
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466 | */ |
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467 | map_page_to_frame(frame,frame,PAGE_CACHEABLE,0); |
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468 | frame_free(frame); |
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469 | |||
470 | /* |
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471 | * Save 0xa to address 0xf of the CMOS RAM. |
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472 | * BIOS will not do the POST after the INIT signal. |
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473 | */ |
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474 | outb(0x70,0xf); |
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475 | outb(0x71,0xa); |
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476 | |||
477 | cpu_priority_high(); |
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478 | |||
479 | pic_disable_irqs(0xffff); |
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480 | apic_init(); |
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481 | |||
482 | for (i = 0; i < processor_entry_cnt; i++) { |
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483 | struct descriptor *gdt_new; |
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484 | |||
485 | /* |
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486 | * Skip processors marked unusable. |
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487 | */ |
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488 | if (pr[i].cpu_flags & (1<<0) == 0) |
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489 | continue; |
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27 | jermar | 490 | |
1 | jermar | 491 | /* |
492 | * The bootstrap processor is already up. |
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493 | */ |
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494 | if (pr[i].cpu_flags & (1<<1)) |
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495 | continue; |
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27 | jermar | 496 | |
497 | if (pr[i].l_apic_id == l_apic_id()) { |
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28 | jermar | 498 | printf("%L: bad processor entry #%d, will not send IPI to myself\n", &pr[i], i); |
27 | jermar | 499 | continue; |
500 | } |
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1 | jermar | 501 | |
502 | /* |
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503 | * Prepare new GDT for CPU in question. |
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504 | */ |
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505 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
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506 | panic(PANIC "couldn't allocate memory for GDT\n"); |
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507 | |||
508 | memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor)); |
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509 | gdtr.base = (__address) gdt_new; |
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27 | jermar | 510 | |
1 | jermar | 511 | if (l_apic_send_init_ipi(pr[i].l_apic_id)) { |
512 | /* |
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513 | * There may be just one AP being initialized at |
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514 | * the time. After it comes completely up, it is |
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515 | * supposed to wake us up. |
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516 | */ |
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517 | waitq_sleep(&ap_completion_wq); |
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518 | cpu_priority_high(); |
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519 | } |
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520 | else { |
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521 | printf("INIT IPI for l_apic%d failed\n", pr[i].l_apic_id); |
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522 | } |
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523 | } |
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524 | |||
525 | /* |
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526 | * Wakeup the kinit thread so that |
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527 | * system initialization can go on. |
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528 | */ |
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529 | waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST); |
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530 | } |
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531 | |||
532 | int mp_irq_to_pin(int irq) |
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533 | { |
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534 | int i; |
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535 | |||
536 | for(i=0;i<io_intr_entry_cnt;i++) { |
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537 | if (io_intr_entries[i].src_bus_irq == irq && io_intr_entries[i].intr_type == 0) |
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538 | return io_intr_entries[i].dst_io_apic_pin; |
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539 | } |
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540 | |||
541 | return -1; |
||
542 | } |
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543 | |||
544 | #endif /* __SMP__ */ |