Subversion Repositories HelenOS

Rev

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__ */