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34 | jermar | 1 | /* |
2701 | jermar | 2 | * Copyright (c) 2008 Jakub Jermar |
34 | jermar | 3 | * All rights reserved. |
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 | |||
1888 | jermar | 29 | /** @addtogroup ia32 |
1702 | cejka | 30 | * @{ |
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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1780 | jermar | 64 | uintptr_t l_apic_address, io_apic_address; |
1059 | jermar | 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 | |
2701 | jermar | 75 | l_apic_address = (uintptr_t) frame_alloc(ONE_FRAME, |
76 | FRAME_ATOMIC | FRAME_KA); |
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1766 | palkovsky | 77 | if (!l_apic_address) |
3790 | svoboda | 78 | panic("Cannot allocate address for l_apic."); |
1059 | jermar | 79 | |
2701 | jermar | 80 | io_apic_address = (uintptr_t) frame_alloc(ONE_FRAME, |
81 | FRAME_ATOMIC | FRAME_KA); |
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1766 | palkovsky | 82 | if (!io_apic_address) |
3790 | svoboda | 83 | panic("Cannot allocate address for io_apic."); |
1059 | jermar | 84 | |
277 | palkovsky | 85 | if (config.cpu_count > 1) { |
2701 | jermar | 86 | page_mapping_insert(AS_KERNEL, l_apic_address, |
87 | (uintptr_t) l_apic, PAGE_NOT_CACHEABLE | PAGE_WRITE); |
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88 | page_mapping_insert(AS_KERNEL, io_apic_address, |
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89 | (uintptr_t) io_apic, PAGE_NOT_CACHEABLE | PAGE_WRITE); |
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1059 | jermar | 90 | |
1780 | jermar | 91 | l_apic = (uint32_t *) l_apic_address; |
92 | io_apic = (uint32_t *) io_apic_address; |
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2222 | decky | 93 | } |
34 | jermar | 94 | } |
95 | |||
128 | jermar | 96 | /* |
97 | * Kernel thread for bringing up application processors. It becomes clear |
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98 | * that we need an arrangement like this (AP's being initialized by a kernel |
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99 | * thread), for a thread has its dedicated stack. (The stack used during the |
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100 | * BSP initialization (prior the very first call to scheduler()) will be used |
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101 | * as an initialization stack for each AP.) |
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102 | */ |
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2441 | decky | 103 | void kmp(void *arg __attribute__((unused))) |
128 | jermar | 104 | { |
2097 | decky | 105 | unsigned int i; |
269 | decky | 106 | |
128 | jermar | 107 | ASSERT(ops != NULL); |
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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2701 | jermar | 117 | *((uint16_t *) (PA2KA(0x467 + 0))) = |
118 | (uint16_t) (((uintptr_t) ap_boot) >> 4); /* segment */ |
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119 | *((uint16_t *) (PA2KA(0x467 + 2))) = 0; /* offset */ |
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128 | jermar | 120 | |
121 | /* |
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122 | * Save 0xa to address 0xf of the CMOS RAM. |
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123 | * BIOS will not do the POST after the INIT signal. |
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124 | */ |
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2107 | jermar | 125 | outb(0x70, 0xf); |
126 | outb(0x71, 0xa); |
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128 | jermar | 127 | |
128 | pic_disable_irqs(0xffff); |
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129 | apic_init(); |
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2441 | decky | 130 | |
131 | uint8_t apic = l_apic_id(); |
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128 | jermar | 132 | |
133 | for (i = 0; i < ops->cpu_count(); i++) { |
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134 | struct descriptor *gdt_new; |
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135 | |||
136 | /* |
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137 | * Skip processors marked unusable. |
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138 | */ |
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139 | if (!ops->cpu_enabled(i)) |
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140 | continue; |
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141 | |||
142 | /* |
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143 | * The bootstrap processor is already up. |
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144 | */ |
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145 | if (ops->cpu_bootstrap(i)) |
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146 | continue; |
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147 | |||
2441 | decky | 148 | if (ops->cpu_apic_id(i) == apic) { |
2701 | jermar | 149 | printf("%s: bad processor entry #%u, will not send IPI " |
150 | "to myself\n", __FUNCTION__, i); |
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128 | jermar | 151 | continue; |
152 | } |
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153 | |||
154 | /* |
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155 | * Prepare new GDT for CPU in question. |
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156 | */ |
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2701 | jermar | 157 | gdt_new = (struct descriptor *) malloc(GDT_ITEMS * |
3209 | jermar | 158 | sizeof(struct descriptor), FRAME_ATOMIC | FRAME_LOW_4_GiB); |
2701 | jermar | 159 | if (!gdt_new) |
3790 | svoboda | 160 | panic("Cannot allocate memory for GDT."); |
128 | jermar | 161 | |
693 | decky | 162 | memcpy(gdt_new, gdt, GDT_ITEMS * sizeof(struct descriptor)); |
3104 | svoboda | 163 | memsetb(&gdt_new[TSS_DES], sizeof(struct descriptor), 0); |
693 | decky | 164 | protected_ap_gdtr.limit = GDT_ITEMS * sizeof(struct descriptor); |
1780 | jermar | 165 | protected_ap_gdtr.base = KA2PA((uintptr_t) gdt_new); |
166 | gdtr.base = (uintptr_t) gdt_new; |
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128 | jermar | 167 | |
168 | if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
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169 | /* |
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298 | decky | 170 | * There may be just one AP being initialized at |
128 | jermar | 171 | * the time. After it comes completely up, it is |
172 | * supposed to wake us up. |
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298 | decky | 173 | */ |
2701 | jermar | 174 | if (waitq_sleep_timeout(&ap_completion_wq, 1000000, |
175 | SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT) { |
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176 | unsigned int cpu = (config.cpu_active > i) ? |
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177 | config.cpu_active : i; |
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178 | printf("%s: waiting for cpu%u (APIC ID = %d) " |
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179 | "timed out\n", __FUNCTION__, cpu, |
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180 | ops->cpu_apic_id(i)); |
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2441 | decky | 181 | } |
298 | decky | 182 | } else |
2701 | jermar | 183 | printf("INIT IPI for l_apic%d failed\n", |
184 | ops->cpu_apic_id(i)); |
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128 | jermar | 185 | } |
186 | } |
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187 | |||
2101 | decky | 188 | int smp_irq_to_pin(unsigned int irq) |
512 | jermar | 189 | { |
190 | ASSERT(ops != NULL); |
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191 | return ops->irq_to_pin(irq); |
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192 | } |
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193 | |||
458 | decky | 194 | #endif /* CONFIG_SMP */ |
1702 | cejka | 195 | |
1888 | jermar | 196 | /** @} |
1702 | cejka | 197 | */ |