Rev 128 | Rev 131 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 34 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | #include <smp/smp.h> |
||
| 128 | jermar | 30 | #include <arch/smp/smp.h> |
| 31 | #include <arch/smp/mps.h> |
||
| 32 | #include <arch/smp/ap.h> |
||
| 34 | jermar | 33 | #include <arch/acpi/acpi.h> |
| 34 | #include <arch/acpi/madt.h> |
||
| 35 | #include <config.h> |
||
| 128 | jermar | 36 | #include <synch/waitq.h> |
| 37 | #include <arch/pm.h> |
||
| 38 | #include <func.h> |
||
| 39 | #include <panic.h> |
||
| 40 | #include <debug.h> |
||
| 41 | #include <arch/asm.h> |
||
| 42 | #include <mm/frame.h> |
||
| 43 | #include <mm/page.h> |
||
| 44 | #include <mm/heap.h> |
||
| 34 | jermar | 45 | |
| 46 | #ifdef __SMP__ |
||
| 47 | |||
| 128 | jermar | 48 | static struct smp_config_operations *ops = NULL; |
| 49 | |||
| 34 | jermar | 50 | void smp_init(void) |
| 51 | { |
||
| 52 | if (acpi_madt) { |
||
| 53 | acpi_madt_parse(); |
||
| 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 | } |
||
| 34 | jermar | 60 | } |
| 61 | |||
| 128 | jermar | 62 | /* |
| 63 | * Kernel thread for bringing up application processors. It becomes clear |
||
| 64 | * that we need an arrangement like this (AP's being initialized by a kernel |
||
| 65 | * thread), for a thread has its dedicated stack. (The stack used during the |
||
| 66 | * BSP initialization (prior the very first call to scheduler()) will be used |
||
| 67 | * as an initialization stack for each AP.) |
||
| 68 | */ |
||
| 69 | void kmp(void *arg) |
||
| 70 | { |
||
| 71 | __address src, dst; |
||
| 72 | int i; |
||
| 34 | jermar | 73 | |
| 128 | jermar | 74 | ASSERT(ops != NULL); |
| 75 | |||
| 76 | waitq_initialize(&ap_completion_wq); |
||
| 77 | |||
| 78 | /* |
||
| 79 | * We need to access data in frame 0. |
||
| 80 | * We boldly make use of kernel address space mapping. |
||
| 81 | */ |
||
| 82 | |||
| 83 | /* |
||
| 84 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
||
| 85 | */ |
||
| 86 | *((__u16 *) (PA2KA(0x467+0))) = ((__address) ap_boot) >> 4; /* segment */ |
||
| 87 | *((__u16 *) (PA2KA(0x467+2))) = 0; /* offset */ |
||
| 88 | |||
| 89 | /* |
||
| 90 | * Save 0xa to address 0xf of the CMOS RAM. |
||
| 91 | * BIOS will not do the POST after the INIT signal. |
||
| 92 | */ |
||
| 93 | outb(0x70,0xf); |
||
| 94 | outb(0x71,0xa); |
||
| 95 | |||
| 96 | cpu_priority_high(); |
||
| 97 | |||
| 98 | pic_disable_irqs(0xffff); |
||
| 99 | apic_init(); |
||
| 100 | |||
| 101 | for (i = 0; i < ops->cpu_count(); i++) { |
||
| 102 | struct descriptor *gdt_new; |
||
| 103 | |||
| 104 | /* |
||
| 105 | * Skip processors marked unusable. |
||
| 106 | */ |
||
| 107 | if (!ops->cpu_enabled(i)) |
||
| 108 | continue; |
||
| 109 | |||
| 110 | /* |
||
| 111 | * The bootstrap processor is already up. |
||
| 112 | */ |
||
| 113 | if (ops->cpu_bootstrap(i)) |
||
| 114 | continue; |
||
| 115 | |||
| 116 | if (ops->cpu_apic_id(i) == l_apic_id()) { |
||
| 117 | printf("kmp: bad processor entry #%d, will not send IPI to myself\n", i); |
||
| 118 | continue; |
||
| 119 | } |
||
| 120 | |||
| 121 | /* |
||
| 122 | * Prepare new GDT for CPU in question. |
||
| 123 | */ |
||
| 124 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
||
| 125 | panic("couldn't allocate memory for GDT\n"); |
||
| 126 | |||
| 127 | memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor)); |
||
| 128 | memsetb(&gdt_new[TSS_DES], sizeof(struct descriptor), 0); |
||
| 129 | gdtr.base = KA2PA((__address) gdt_new); |
||
| 130 | |||
| 131 | if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
||
| 132 | /* |
||
| 133 | * There may be just one AP being initialized at |
||
| 134 | * the time. After it comes completely up, it is |
||
| 135 | * supposed to wake us up. |
||
| 136 | */ |
||
| 137 | waitq_sleep(&ap_completion_wq); |
||
| 138 | cpu_priority_high(); |
||
| 139 | } |
||
| 140 | else { |
||
| 141 | printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i)); |
||
| 142 | } |
||
| 143 | } |
||
| 144 | |||
| 145 | /* |
||
| 146 | * Wakeup the kinit thread so that |
||
| 147 | * system initialization can go on. |
||
| 148 | */ |
||
| 149 | waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST); |
||
| 150 | } |
||
| 151 | |||
| 34 | jermar | 152 | #endif /* __SMP__ */ |