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34 | 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 <smp/smp.h> |
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128 | jermar | 30 | #include <arch/smp/smp.h> |
31 | #include <arch/smp/mps.h> |
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32 | #include <arch/smp/ap.h> |
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34 | jermar | 33 | #include <arch/acpi/acpi.h> |
34 | #include <arch/acpi/madt.h> |
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35 | #include <config.h> |
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128 | jermar | 36 | #include <synch/waitq.h> |
37 | #include <arch/pm.h> |
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38 | #include <func.h> |
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39 | #include <panic.h> |
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40 | #include <debug.h> |
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41 | #include <arch/asm.h> |
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42 | #include <mm/frame.h> |
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43 | #include <mm/page.h> |
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44 | #include <mm/heap.h> |
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34 | jermar | 45 | |
46 | #ifdef __SMP__ |
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47 | |||
128 | jermar | 48 | static struct smp_config_operations *ops = NULL; |
49 | |||
34 | jermar | 50 | void smp_init(void) |
51 | { |
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52 | if (acpi_madt) { |
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53 | acpi_madt_parse(); |
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129 | jermar | 54 | ops = &madt_config_operations; |
34 | jermar | 55 | } |
128 | jermar | 56 | if (config.cpu_count == 1) { |
34 | jermar | 57 | mps_init(); |
128 | jermar | 58 | ops = &mps_config_operations; |
59 | } |
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34 | jermar | 60 | } |
61 | |||
128 | jermar | 62 | /* |
63 | * Kernel thread for bringing up application processors. It becomes clear |
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64 | * that we need an arrangement like this (AP's being initialized by a kernel |
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65 | * thread), for a thread has its dedicated stack. (The stack used during the |
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66 | * BSP initialization (prior the very first call to scheduler()) will be used |
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67 | * as an initialization stack for each AP.) |
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68 | */ |
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69 | void kmp(void *arg) |
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70 | { |
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71 | __address src, dst; |
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72 | int i; |
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34 | jermar | 73 | |
128 | jermar | 74 | ASSERT(ops != NULL); |
75 | |||
76 | waitq_initialize(&ap_completion_wq); |
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77 | |||
78 | /* |
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79 | * We need to access data in frame 0. |
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80 | * We boldly make use of kernel address space mapping. |
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81 | */ |
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82 | |||
83 | /* |
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84 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
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85 | */ |
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86 | *((__u16 *) (PA2KA(0x467+0))) = ((__address) ap_boot) >> 4; /* segment */ |
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87 | *((__u16 *) (PA2KA(0x467+2))) = 0; /* offset */ |
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88 | |||
89 | /* |
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90 | * Save 0xa to address 0xf of the CMOS RAM. |
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91 | * BIOS will not do the POST after the INIT signal. |
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92 | */ |
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93 | outb(0x70,0xf); |
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94 | outb(0x71,0xa); |
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95 | |||
96 | cpu_priority_high(); |
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97 | |||
98 | pic_disable_irqs(0xffff); |
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99 | apic_init(); |
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100 | |||
101 | for (i = 0; i < ops->cpu_count(); i++) { |
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102 | struct descriptor *gdt_new; |
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103 | |||
104 | /* |
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105 | * Skip processors marked unusable. |
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106 | */ |
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107 | if (!ops->cpu_enabled(i)) |
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108 | continue; |
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109 | |||
110 | /* |
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111 | * The bootstrap processor is already up. |
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112 | */ |
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113 | if (ops->cpu_bootstrap(i)) |
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114 | continue; |
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115 | |||
116 | if (ops->cpu_apic_id(i) == l_apic_id()) { |
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117 | printf("kmp: bad processor entry #%d, will not send IPI to myself\n", i); |
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118 | continue; |
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119 | } |
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120 | |||
121 | /* |
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122 | * Prepare new GDT for CPU in question. |
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123 | */ |
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124 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
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125 | panic("couldn't allocate memory for GDT\n"); |
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126 | |||
127 | memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor)); |
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128 | memsetb(&gdt_new[TSS_DES], sizeof(struct descriptor), 0); |
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129 | gdtr.base = KA2PA((__address) gdt_new); |
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130 | |||
131 | if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
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132 | /* |
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133 | * There may be just one AP being initialized at |
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134 | * the time. After it comes completely up, it is |
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135 | * supposed to wake us up. |
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136 | */ |
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137 | waitq_sleep(&ap_completion_wq); |
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138 | cpu_priority_high(); |
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139 | } |
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140 | else { |
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141 | printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i)); |
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142 | } |
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143 | } |
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144 | |||
145 | /* |
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146 | * Wakeup the kinit thread so that |
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147 | * system initialization can go on. |
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148 | */ |
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149 | waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST); |
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150 | } |
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151 | |||
34 | jermar | 152 | #endif /* __SMP__ */ |