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