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| Rev | Author | Line No. | Line |
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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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| 195 | vana | 45 | #include <print.h> |
| 46 | #include <memstr.h> |
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| 47 | #include <arch/i8259.h> |
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| 34 | jermar | 48 | |
| 49 | #ifdef __SMP__ |
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| 50 | |||
| 128 | jermar | 51 | static struct smp_config_operations *ops = NULL; |
| 52 | |||
| 34 | jermar | 53 | void smp_init(void) |
| 54 | { |
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| 55 | if (acpi_madt) { |
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| 56 | acpi_madt_parse(); |
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| 129 | jermar | 57 | ops = &madt_config_operations; |
| 34 | jermar | 58 | } |
| 128 | jermar | 59 | if (config.cpu_count == 1) { |
| 34 | jermar | 60 | mps_init(); |
| 128 | jermar | 61 | ops = &mps_config_operations; |
| 62 | } |
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| 131 | jermar | 63 | |
| 64 | if (config.cpu_count > 1) { |
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| 273 | palkovsky | 65 | map_page_to_frame((__address)l_apic, KA2PA((__address)l_apic), |
| 66 | PAGE_NOT_CACHEABLE, 0); |
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| 67 | map_page_to_frame((__address) io_apic, |
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| 68 | KA2PA((__address) io_apic), |
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| 69 | PAGE_NOT_CACHEABLE, 0); |
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| 131 | jermar | 70 | } |
| 71 | |||
| 72 | /* |
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| 73 | * Must be initialized outside the kmp thread, since it is waited |
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| 74 | * on before the kmp thread is created. |
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| 75 | */ |
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| 76 | waitq_initialize(&kmp_completion_wq); |
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| 77 | |||
| 34 | jermar | 78 | } |
| 79 | |||
| 128 | jermar | 80 | /* |
| 81 | * Kernel thread for bringing up application processors. It becomes clear |
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| 82 | * that we need an arrangement like this (AP's being initialized by a kernel |
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| 83 | * thread), for a thread has its dedicated stack. (The stack used during the |
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| 84 | * BSP initialization (prior the very first call to scheduler()) will be used |
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| 85 | * as an initialization stack for each AP.) |
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| 86 | */ |
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| 87 | void kmp(void *arg) |
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| 88 | { |
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| 89 | __address src, dst; |
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| 90 | int i; |
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| 269 | decky | 91 | |
| 128 | jermar | 92 | ASSERT(ops != NULL); |
| 93 | |||
| 94 | waitq_initialize(&ap_completion_wq); |
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| 95 | |||
| 96 | /* |
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| 97 | * We need to access data in frame 0. |
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| 98 | * We boldly make use of kernel address space mapping. |
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| 99 | */ |
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| 100 | |||
| 101 | /* |
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| 102 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
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| 103 | */ |
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| 104 | *((__u16 *) (PA2KA(0x467+0))) = ((__address) ap_boot) >> 4; /* segment */ |
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| 105 | *((__u16 *) (PA2KA(0x467+2))) = 0; /* offset */ |
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| 106 | |||
| 107 | /* |
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| 108 | * Save 0xa to address 0xf of the CMOS RAM. |
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| 109 | * BIOS will not do the POST after the INIT signal. |
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| 110 | */ |
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| 111 | outb(0x70,0xf); |
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| 112 | outb(0x71,0xa); |
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| 113 | |||
| 114 | cpu_priority_high(); |
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| 115 | |||
| 116 | pic_disable_irqs(0xffff); |
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| 117 | apic_init(); |
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| 118 | |||
| 119 | for (i = 0; i < ops->cpu_count(); i++) { |
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| 120 | struct descriptor *gdt_new; |
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| 121 | |||
| 122 | /* |
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| 123 | * Skip processors marked unusable. |
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| 124 | */ |
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| 125 | if (!ops->cpu_enabled(i)) |
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| 126 | continue; |
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| 127 | |||
| 128 | /* |
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| 129 | * The bootstrap processor is already up. |
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| 130 | */ |
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| 131 | if (ops->cpu_bootstrap(i)) |
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| 132 | continue; |
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| 133 | |||
| 134 | if (ops->cpu_apic_id(i) == l_apic_id()) { |
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| 135 | printf("kmp: bad processor entry #%d, will not send IPI to myself\n", i); |
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| 136 | continue; |
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| 137 | } |
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| 138 | |||
| 139 | /* |
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| 140 | * Prepare new GDT for CPU in question. |
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| 141 | */ |
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| 142 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
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| 143 | panic("couldn't allocate memory for GDT\n"); |
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| 144 | |||
| 205 | jermar | 145 | memcpy(gdt_new, gdt, GDT_ITEMS*sizeof(struct descriptor)); |
| 195 | vana | 146 | memsetb((__address)(&gdt_new[TSS_DES]), sizeof(struct descriptor), 0); |
| 269 | decky | 147 | ap_bootstrap_gdtr.base = KA2PA((__address) gdt_new); |
| 148 | gdtr.base = (__address) gdt_new; |
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| 128 | jermar | 149 | |
| 150 | if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
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| 151 | /* |
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| 152 | * There may be just one AP being initialized at |
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| 153 | * the time. After it comes completely up, it is |
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| 154 | * supposed to wake us up. |
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| 155 | */ |
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| 156 | waitq_sleep(&ap_completion_wq); |
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| 157 | } |
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| 158 | else { |
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| 159 | printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i)); |
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| 160 | } |
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| 161 | } |
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| 162 | |||
| 163 | /* |
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| 164 | * Wakeup the kinit thread so that |
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| 165 | * system initialization can go on. |
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| 166 | */ |
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| 167 | waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST); |
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| 168 | } |
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| 169 | |||
| 34 | jermar | 170 | #endif /* __SMP__ */ |