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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Jakub Jermar |
2 | * Copyright (C) 2005 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <smp/smp.h> |
29 | #include <smp/smp.h> |
30 | #include <arch/smp/smp.h> |
30 | #include <arch/smp/smp.h> |
31 | #include <arch/smp/mps.h> |
31 | #include <arch/smp/mps.h> |
32 | #include <arch/smp/ap.h> |
32 | #include <arch/smp/ap.h> |
33 | #include <arch/acpi/acpi.h> |
33 | #include <arch/acpi/acpi.h> |
34 | #include <arch/acpi/madt.h> |
34 | #include <arch/acpi/madt.h> |
35 | #include <config.h> |
35 | #include <config.h> |
36 | #include <synch/waitq.h> |
36 | #include <synch/waitq.h> |
37 | #include <arch/pm.h> |
37 | #include <arch/pm.h> |
38 | #include <func.h> |
38 | #include <func.h> |
39 | #include <panic.h> |
39 | #include <panic.h> |
40 | #include <debug.h> |
40 | #include <debug.h> |
41 | #include <arch/asm.h> |
41 | #include <arch/asm.h> |
42 | #include <mm/frame.h> |
42 | #include <mm/frame.h> |
43 | #include <mm/page.h> |
43 | #include <mm/page.h> |
44 | #include <mm/heap.h> |
44 | #include <mm/heap.h> |
45 | 45 | ||
46 | #ifdef __SMP__ |
46 | #ifdef __SMP__ |
47 | 47 | ||
48 | static struct smp_config_operations *ops = NULL; |
48 | static struct smp_config_operations *ops = NULL; |
49 | 49 | ||
50 | void smp_init(void) |
50 | void smp_init(void) |
51 | { |
51 | { |
52 | if (acpi_madt) { |
52 | if (acpi_madt) { |
53 | acpi_madt_parse(); |
53 | acpi_madt_parse(); |
- | 54 | ops = &madt_config_operations; |
|
54 | } |
55 | } |
55 | if (config.cpu_count == 1) { |
56 | if (config.cpu_count == 1) { |
56 | mps_init(); |
57 | mps_init(); |
57 | ops = &mps_config_operations; |
58 | ops = &mps_config_operations; |
58 | } |
59 | } |
59 | } |
60 | } |
60 | 61 | ||
61 | /* |
62 | /* |
62 | * Kernel thread for bringing up application processors. It becomes clear |
63 | * Kernel thread for bringing up application processors. It becomes clear |
63 | * that we need an arrangement like this (AP's being initialized by a kernel |
64 | * that we need an arrangement like this (AP's being initialized by a kernel |
64 | * thread), for a thread has its dedicated stack. (The stack used during the |
65 | * thread), for a thread has its dedicated stack. (The stack used during the |
65 | * BSP initialization (prior the very first call to scheduler()) will be used |
66 | * BSP initialization (prior the very first call to scheduler()) will be used |
66 | * as an initialization stack for each AP.) |
67 | * as an initialization stack for each AP.) |
67 | */ |
68 | */ |
68 | void kmp(void *arg) |
69 | void kmp(void *arg) |
69 | { |
70 | { |
70 | __address src, dst; |
71 | __address src, dst; |
71 | int i; |
72 | int i; |
72 | 73 | ||
73 | ASSERT(ops != NULL); |
74 | ASSERT(ops != NULL); |
74 | 75 | ||
75 | waitq_initialize(&ap_completion_wq); |
76 | waitq_initialize(&ap_completion_wq); |
76 | 77 | ||
77 | /* |
78 | /* |
78 | * We need to access data in frame 0. |
79 | * We need to access data in frame 0. |
79 | * We boldly make use of kernel address space mapping. |
80 | * We boldly make use of kernel address space mapping. |
80 | */ |
81 | */ |
81 | 82 | ||
82 | /* |
83 | /* |
83 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
84 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
84 | */ |
85 | */ |
85 | *((__u16 *) (PA2KA(0x467+0))) = ((__address) ap_boot) >> 4; /* segment */ |
86 | *((__u16 *) (PA2KA(0x467+0))) = ((__address) ap_boot) >> 4; /* segment */ |
86 | *((__u16 *) (PA2KA(0x467+2))) = 0; /* offset */ |
87 | *((__u16 *) (PA2KA(0x467+2))) = 0; /* offset */ |
87 | 88 | ||
88 | /* |
89 | /* |
89 | * Save 0xa to address 0xf of the CMOS RAM. |
90 | * Save 0xa to address 0xf of the CMOS RAM. |
90 | * BIOS will not do the POST after the INIT signal. |
91 | * BIOS will not do the POST after the INIT signal. |
91 | */ |
92 | */ |
92 | outb(0x70,0xf); |
93 | outb(0x70,0xf); |
93 | outb(0x71,0xa); |
94 | outb(0x71,0xa); |
94 | 95 | ||
95 | cpu_priority_high(); |
96 | cpu_priority_high(); |
96 | 97 | ||
97 | pic_disable_irqs(0xffff); |
98 | pic_disable_irqs(0xffff); |
98 | apic_init(); |
99 | apic_init(); |
99 | 100 | ||
100 | for (i = 0; i < ops->cpu_count(); i++) { |
101 | for (i = 0; i < ops->cpu_count(); i++) { |
101 | struct descriptor *gdt_new; |
102 | struct descriptor *gdt_new; |
102 | 103 | ||
103 | /* |
104 | /* |
104 | * Skip processors marked unusable. |
105 | * Skip processors marked unusable. |
105 | */ |
106 | */ |
106 | if (!ops->cpu_enabled(i)) |
107 | if (!ops->cpu_enabled(i)) |
107 | continue; |
108 | continue; |
108 | 109 | ||
109 | /* |
110 | /* |
110 | * The bootstrap processor is already up. |
111 | * The bootstrap processor is already up. |
111 | */ |
112 | */ |
112 | if (ops->cpu_bootstrap(i)) |
113 | if (ops->cpu_bootstrap(i)) |
113 | continue; |
114 | continue; |
114 | 115 | ||
115 | if (ops->cpu_apic_id(i) == l_apic_id()) { |
116 | if (ops->cpu_apic_id(i) == l_apic_id()) { |
116 | printf("kmp: bad processor entry #%d, will not send IPI to myself\n", i); |
117 | printf("kmp: bad processor entry #%d, will not send IPI to myself\n", i); |
117 | continue; |
118 | continue; |
118 | } |
119 | } |
119 | 120 | ||
120 | /* |
121 | /* |
121 | * Prepare new GDT for CPU in question. |
122 | * Prepare new GDT for CPU in question. |
122 | */ |
123 | */ |
123 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
124 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
124 | panic("couldn't allocate memory for GDT\n"); |
125 | panic("couldn't allocate memory for GDT\n"); |
125 | 126 | ||
126 | memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor)); |
127 | memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor)); |
127 | memsetb(&gdt_new[TSS_DES], sizeof(struct descriptor), 0); |
128 | memsetb(&gdt_new[TSS_DES], sizeof(struct descriptor), 0); |
128 | gdtr.base = KA2PA((__address) gdt_new); |
129 | gdtr.base = KA2PA((__address) gdt_new); |
129 | 130 | ||
130 | if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
131 | if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
131 | /* |
132 | /* |
132 | * There may be just one AP being initialized at |
133 | * There may be just one AP being initialized at |
133 | * the time. After it comes completely up, it is |
134 | * the time. After it comes completely up, it is |
134 | * supposed to wake us up. |
135 | * supposed to wake us up. |
135 | */ |
136 | */ |
136 | waitq_sleep(&ap_completion_wq); |
137 | waitq_sleep(&ap_completion_wq); |
137 | cpu_priority_high(); |
138 | cpu_priority_high(); |
138 | } |
139 | } |
139 | else { |
140 | else { |
140 | printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i)); |
141 | printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i)); |
141 | } |
142 | } |
142 | } |
143 | } |
143 | 144 | ||
144 | /* |
145 | /* |
145 | * Wakeup the kinit thread so that |
146 | * Wakeup the kinit thread so that |
146 | * system initialization can go on. |
147 | * system initialization can go on. |
147 | */ |
148 | */ |
148 | waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST); |
149 | waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST); |
149 | } |
150 | } |
150 | 151 | ||
151 | #endif /* __SMP__ */ |
152 | #endif /* __SMP__ */ |
152 | 153 |