Rev 195 | Rev 269 | 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> |
||
195 | vana | 45 | #include <print.h> |
46 | #include <memstr.h> |
||
47 | #include <arch/i8259.h> |
||
34 | jermar | 48 | |
49 | #ifdef __SMP__ |
||
50 | |||
128 | jermar | 51 | static struct smp_config_operations *ops = NULL; |
52 | |||
34 | jermar | 53 | void smp_init(void) |
54 | { |
||
55 | if (acpi_madt) { |
||
56 | acpi_madt_parse(); |
||
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 | } |
||
131 | jermar | 63 | |
64 | if (config.cpu_count > 1) { |
||
65 | map_page_to_frame((__address) l_apic, (__address) l_apic, PAGE_NOT_CACHEABLE, 0); |
||
66 | map_page_to_frame((__address) io_apic, (__address) io_apic, PAGE_NOT_CACHEABLE, 0); |
||
67 | } |
||
68 | |||
69 | /* |
||
70 | * Must be initialized outside the kmp thread, since it is waited |
||
71 | * on before the kmp thread is created. |
||
72 | */ |
||
73 | waitq_initialize(&kmp_completion_wq); |
||
74 | |||
34 | jermar | 75 | } |
76 | |||
128 | jermar | 77 | /* |
78 | * Kernel thread for bringing up application processors. It becomes clear |
||
79 | * that we need an arrangement like this (AP's being initialized by a kernel |
||
80 | * thread), for a thread has its dedicated stack. (The stack used during the |
||
81 | * BSP initialization (prior the very first call to scheduler()) will be used |
||
82 | * as an initialization stack for each AP.) |
||
83 | */ |
||
84 | void kmp(void *arg) |
||
85 | { |
||
86 | __address src, dst; |
||
87 | int i; |
||
34 | jermar | 88 | |
128 | jermar | 89 | ASSERT(ops != NULL); |
90 | |||
91 | waitq_initialize(&ap_completion_wq); |
||
92 | |||
93 | /* |
||
94 | * We need to access data in frame 0. |
||
95 | * We boldly make use of kernel address space mapping. |
||
96 | */ |
||
97 | |||
98 | /* |
||
99 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
||
100 | */ |
||
101 | *((__u16 *) (PA2KA(0x467+0))) = ((__address) ap_boot) >> 4; /* segment */ |
||
102 | *((__u16 *) (PA2KA(0x467+2))) = 0; /* offset */ |
||
103 | |||
104 | /* |
||
105 | * Save 0xa to address 0xf of the CMOS RAM. |
||
106 | * BIOS will not do the POST after the INIT signal. |
||
107 | */ |
||
108 | outb(0x70,0xf); |
||
109 | outb(0x71,0xa); |
||
110 | |||
111 | cpu_priority_high(); |
||
112 | |||
113 | pic_disable_irqs(0xffff); |
||
114 | apic_init(); |
||
115 | |||
116 | for (i = 0; i < ops->cpu_count(); i++) { |
||
117 | struct descriptor *gdt_new; |
||
118 | |||
119 | /* |
||
120 | * Skip processors marked unusable. |
||
121 | */ |
||
122 | if (!ops->cpu_enabled(i)) |
||
123 | continue; |
||
124 | |||
125 | /* |
||
126 | * The bootstrap processor is already up. |
||
127 | */ |
||
128 | if (ops->cpu_bootstrap(i)) |
||
129 | continue; |
||
130 | |||
131 | if (ops->cpu_apic_id(i) == l_apic_id()) { |
||
132 | printf("kmp: bad processor entry #%d, will not send IPI to myself\n", i); |
||
133 | continue; |
||
134 | } |
||
135 | |||
136 | /* |
||
137 | * Prepare new GDT for CPU in question. |
||
138 | */ |
||
139 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
||
140 | panic("couldn't allocate memory for GDT\n"); |
||
141 | |||
205 | jermar | 142 | memcpy(gdt_new, gdt, GDT_ITEMS*sizeof(struct descriptor)); |
195 | vana | 143 | memsetb((__address)(&gdt_new[TSS_DES]), sizeof(struct descriptor), 0); |
128 | jermar | 144 | gdtr.base = KA2PA((__address) gdt_new); |
145 | |||
146 | if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
||
147 | /* |
||
148 | * There may be just one AP being initialized at |
||
149 | * the time. After it comes completely up, it is |
||
150 | * supposed to wake us up. |
||
151 | */ |
||
152 | waitq_sleep(&ap_completion_wq); |
||
153 | } |
||
154 | else { |
||
155 | printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i)); |
||
156 | } |
||
157 | } |
||
158 | |||
159 | /* |
||
160 | * Wakeup the kinit thread so that |
||
161 | * system initialization can go on. |
||
162 | */ |
||
163 | waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST); |
||
164 | } |
||
165 | |||
34 | jermar | 166 | #endif /* __SMP__ */ |