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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 | |||
1702 | cejka | 29 | /** @addtogroup ia32 |
30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
34 | jermar | 35 | #include <smp/smp.h> |
128 | jermar | 36 | #include <arch/smp/smp.h> |
37 | #include <arch/smp/mps.h> |
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38 | #include <arch/smp/ap.h> |
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693 | decky | 39 | #include <arch/boot/boot.h> |
452 | decky | 40 | #include <genarch/acpi/acpi.h> |
41 | #include <genarch/acpi/madt.h> |
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34 | jermar | 42 | #include <config.h> |
128 | jermar | 43 | #include <synch/waitq.h> |
294 | jermar | 44 | #include <synch/synch.h> |
128 | jermar | 45 | #include <arch/pm.h> |
46 | #include <func.h> |
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47 | #include <panic.h> |
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48 | #include <debug.h> |
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49 | #include <arch/asm.h> |
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50 | #include <mm/frame.h> |
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51 | #include <mm/page.h> |
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814 | palkovsky | 52 | #include <mm/slab.h> |
755 | jermar | 53 | #include <mm/as.h> |
195 | vana | 54 | #include <print.h> |
55 | #include <memstr.h> |
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1477 | decky | 56 | #include <arch/drivers/i8259.h> |
34 | jermar | 57 | |
458 | decky | 58 | #ifdef CONFIG_SMP |
34 | jermar | 59 | |
128 | jermar | 60 | static struct smp_config_operations *ops = NULL; |
61 | |||
34 | jermar | 62 | void smp_init(void) |
63 | { |
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1059 | jermar | 64 | __address l_apic_address, io_apic_address; |
65 | |||
34 | jermar | 66 | if (acpi_madt) { |
67 | acpi_madt_parse(); |
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129 | jermar | 68 | ops = &madt_config_operations; |
34 | jermar | 69 | } |
128 | jermar | 70 | if (config.cpu_count == 1) { |
34 | jermar | 71 | mps_init(); |
128 | jermar | 72 | ops = &mps_config_operations; |
73 | } |
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131 | jermar | 74 | |
1766 | palkovsky | 75 | l_apic_address = (__address) frame_alloc(ONE_FRAME, FRAME_ATOMIC | FRAME_KA); |
76 | if (!l_apic_address) |
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1059 | jermar | 77 | panic("cannot allocate address for l_apic\n"); |
78 | |||
1766 | palkovsky | 79 | io_apic_address = (__address) frame_alloc(ONE_FRAME, FRAME_ATOMIC | FRAME_KA); |
80 | if (!io_apic_address) |
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1059 | jermar | 81 | panic("cannot allocate address for io_apic\n"); |
82 | |||
277 | palkovsky | 83 | if (config.cpu_count > 1) { |
1059 | jermar | 84 | page_mapping_insert(AS_KERNEL, l_apic_address, (__address) l_apic, |
756 | jermar | 85 | PAGE_NOT_CACHEABLE); |
1059 | jermar | 86 | page_mapping_insert(AS_KERNEL, io_apic_address, (__address) io_apic, |
756 | jermar | 87 | PAGE_NOT_CACHEABLE); |
1059 | jermar | 88 | |
89 | l_apic = (__u32 *) l_apic_address; |
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90 | io_apic = (__u32 *) io_apic_address; |
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131 | jermar | 91 | } |
34 | jermar | 92 | } |
93 | |||
128 | jermar | 94 | /* |
95 | * Kernel thread for bringing up application processors. It becomes clear |
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96 | * that we need an arrangement like this (AP's being initialized by a kernel |
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97 | * thread), for a thread has its dedicated stack. (The stack used during the |
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98 | * BSP initialization (prior the very first call to scheduler()) will be used |
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99 | * as an initialization stack for each AP.) |
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100 | */ |
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101 | void kmp(void *arg) |
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102 | { |
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103 | int i; |
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269 | decky | 104 | |
128 | jermar | 105 | ASSERT(ops != NULL); |
106 | |||
107 | waitq_initialize(&ap_completion_wq); |
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108 | |||
109 | /* |
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110 | * We need to access data in frame 0. |
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111 | * We boldly make use of kernel address space mapping. |
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112 | */ |
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113 | |||
114 | /* |
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115 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
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116 | */ |
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117 | *((__u16 *) (PA2KA(0x467+0))) = ((__address) ap_boot) >> 4; /* segment */ |
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118 | *((__u16 *) (PA2KA(0x467+2))) = 0; /* offset */ |
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119 | |||
120 | /* |
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121 | * Save 0xa to address 0xf of the CMOS RAM. |
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122 | * BIOS will not do the POST after the INIT signal. |
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123 | */ |
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124 | outb(0x70,0xf); |
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125 | outb(0x71,0xa); |
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126 | |||
127 | pic_disable_irqs(0xffff); |
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128 | apic_init(); |
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129 | |||
130 | for (i = 0; i < ops->cpu_count(); i++) { |
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131 | struct descriptor *gdt_new; |
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132 | |||
133 | /* |
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134 | * Skip processors marked unusable. |
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135 | */ |
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136 | if (!ops->cpu_enabled(i)) |
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137 | continue; |
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138 | |||
139 | /* |
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140 | * The bootstrap processor is already up. |
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141 | */ |
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142 | if (ops->cpu_bootstrap(i)) |
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143 | continue; |
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144 | |||
145 | if (ops->cpu_apic_id(i) == l_apic_id()) { |
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294 | jermar | 146 | printf("%s: bad processor entry #%d, will not send IPI to myself\n", __FUNCTION__, i); |
128 | jermar | 147 | continue; |
148 | } |
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149 | |||
150 | /* |
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151 | * Prepare new GDT for CPU in question. |
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152 | */ |
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822 | palkovsky | 153 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor), FRAME_ATOMIC))) |
128 | jermar | 154 | panic("couldn't allocate memory for GDT\n"); |
155 | |||
693 | decky | 156 | memcpy(gdt_new, gdt, GDT_ITEMS * sizeof(struct descriptor)); |
195 | vana | 157 | memsetb((__address)(&gdt_new[TSS_DES]), sizeof(struct descriptor), 0); |
693 | decky | 158 | protected_ap_gdtr.limit = GDT_ITEMS * sizeof(struct descriptor); |
159 | protected_ap_gdtr.base = KA2PA((__address) gdt_new); |
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269 | decky | 160 | gdtr.base = (__address) gdt_new; |
128 | jermar | 161 | |
162 | if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
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163 | /* |
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298 | decky | 164 | * There may be just one AP being initialized at |
128 | jermar | 165 | * the time. After it comes completely up, it is |
166 | * supposed to wake us up. |
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298 | decky | 167 | */ |
1502 | jermar | 168 | if (waitq_sleep_timeout(&ap_completion_wq, 1000000, SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT) |
294 | jermar | 169 | printf("%s: waiting for cpu%d (APIC ID = %d) timed out\n", __FUNCTION__, config.cpu_active > i ? config.cpu_active : i, ops->cpu_apic_id(i)); |
298 | decky | 170 | } else |
128 | jermar | 171 | printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i)); |
172 | } |
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173 | } |
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174 | |||
512 | jermar | 175 | int smp_irq_to_pin(int irq) |
176 | { |
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177 | ASSERT(ops != NULL); |
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178 | return ops->irq_to_pin(irq); |
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179 | } |
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180 | |||
458 | decky | 181 | #endif /* CONFIG_SMP */ |
1702 | cejka | 182 | |
183 | /** @} |
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184 | */ |
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185 |