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34 jermar 1
/*
2701 jermar 2
 * Copyright (c) 2008 Jakub Jermar
34 jermar 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1888 jermar 29
/** @addtogroup ia32   
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 * @{
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 */
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/** @file
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 */
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34 jermar 35
#include <smp/smp.h>
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#include <arch/smp/smp.h>
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#include <arch/smp/mps.h>
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#include <arch/smp/ap.h>
693 decky 39
#include <arch/boot/boot.h>
452 decky 40
#include <genarch/acpi/acpi.h>
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#include <genarch/acpi/madt.h>
34 jermar 42
#include <config.h>
128 jermar 43
#include <synch/waitq.h>
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#include <synch/synch.h>
128 jermar 45
#include <arch/pm.h>
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#include <func.h>
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#include <panic.h>
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#include <debug.h>
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#include <arch/asm.h>
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#include <mm/frame.h>
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#include <mm/page.h>
814 palkovsky 52
#include <mm/slab.h>
755 jermar 53
#include <mm/as.h>
195 vana 54
#include <print.h>
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#include <memstr.h>
1477 decky 56
#include <arch/drivers/i8259.h>
34 jermar 57
 
458 decky 58
#ifdef CONFIG_SMP
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128 jermar 60
static struct smp_config_operations *ops = NULL;
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34 jermar 62
void smp_init(void)
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{
1780 jermar 64
    uintptr_t l_apic_address, io_apic_address;
1059 jermar 65
 
34 jermar 66
    if (acpi_madt) {
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        acpi_madt_parse();
129 jermar 68
        ops = &madt_config_operations;
34 jermar 69
    }
128 jermar 70
    if (config.cpu_count == 1) {
34 jermar 71
        mps_init();
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        ops = &mps_config_operations;
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    }
131 jermar 74
 
2701 jermar 75
    l_apic_address = (uintptr_t) frame_alloc(ONE_FRAME,
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        FRAME_ATOMIC | FRAME_KA);
1766 palkovsky 77
    if (!l_apic_address)
1059 jermar 78
        panic("cannot allocate address for l_apic\n");
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2701 jermar 80
    io_apic_address = (uintptr_t) frame_alloc(ONE_FRAME,
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        FRAME_ATOMIC | FRAME_KA);
1766 palkovsky 82
    if (!io_apic_address)
1059 jermar 83
        panic("cannot allocate address for io_apic\n");
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277 palkovsky 85
    if (config.cpu_count > 1) {    
2701 jermar 86
        page_mapping_insert(AS_KERNEL, l_apic_address,
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            (uintptr_t) l_apic, PAGE_NOT_CACHEABLE | PAGE_WRITE);
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        page_mapping_insert(AS_KERNEL, io_apic_address,
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            (uintptr_t) io_apic, PAGE_NOT_CACHEABLE | PAGE_WRITE);
1059 jermar 90
 
1780 jermar 91
        l_apic = (uint32_t *) l_apic_address;
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        io_apic = (uint32_t *) io_apic_address;
2222 decky 93
    }
34 jermar 94
}
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128 jermar 96
/*
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 * Kernel thread for bringing up application processors. It becomes clear
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 * that we need an arrangement like this (AP's being initialized by a kernel
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 * thread), for a thread has its dedicated stack. (The stack used during the
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 * BSP initialization (prior the very first call to scheduler()) will be used
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 * as an initialization stack for each AP.)
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 */
2441 decky 103
void kmp(void *arg __attribute__((unused)))
128 jermar 104
{
2097 decky 105
    unsigned int i;
269 decky 106
 
128 jermar 107
    ASSERT(ops != NULL);
108
 
109
    /*
110
     * We need to access data in frame 0.
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     * We boldly make use of kernel address space mapping.
112
     */
113
 
114
    /*
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     * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot()
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     */
2701 jermar 117
    *((uint16_t *) (PA2KA(0x467 + 0))) =
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        (uint16_t) (((uintptr_t) ap_boot) >> 4);    /* segment */
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    *((uint16_t *) (PA2KA(0x467 + 2))) = 0;     /* offset */
128 jermar 120
 
121
    /*
122
     * Save 0xa to address 0xf of the CMOS RAM.
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     * BIOS will not do the POST after the INIT signal.
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     */
2107 jermar 125
    outb(0x70, 0xf);
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    outb(0x71, 0xa);
128 jermar 127
 
128
    pic_disable_irqs(0xffff);
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    apic_init();
2441 decky 130
 
131
    uint8_t apic = l_apic_id();
128 jermar 132
 
133
    for (i = 0; i < ops->cpu_count(); i++) {
134
        struct descriptor *gdt_new;
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136
        /*
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         * Skip processors marked unusable.
138
         */
139
        if (!ops->cpu_enabled(i))
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            continue;
141
 
142
        /*
143
         * The bootstrap processor is already up.
144
         */
145
        if (ops->cpu_bootstrap(i))
146
            continue;
147
 
2441 decky 148
        if (ops->cpu_apic_id(i) == apic) {
2701 jermar 149
            printf("%s: bad processor entry #%u, will not send IPI "
150
                "to myself\n", __FUNCTION__, i);
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            continue;
152
        }
153
 
154
        /*
155
         * Prepare new GDT for CPU in question.
156
         */
2701 jermar 157
        gdt_new = (struct descriptor *) malloc(GDT_ITEMS *
3209 jermar 158
            sizeof(struct descriptor), FRAME_ATOMIC | FRAME_LOW_4_GiB);
2701 jermar 159
        if (!gdt_new)
128 jermar 160
            panic("couldn't allocate memory for GDT\n");
161
 
693 decky 162
        memcpy(gdt_new, gdt, GDT_ITEMS * sizeof(struct descriptor));
3104 svoboda 163
        memsetb(&gdt_new[TSS_DES], sizeof(struct descriptor), 0);
693 decky 164
        protected_ap_gdtr.limit = GDT_ITEMS * sizeof(struct descriptor);
1780 jermar 165
        protected_ap_gdtr.base = KA2PA((uintptr_t) gdt_new);
166
        gdtr.base = (uintptr_t) gdt_new;
128 jermar 167
 
168
        if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) {
169
            /*
298 decky 170
             * There may be just one AP being initialized at
128 jermar 171
             * the time. After it comes completely up, it is
172
             * supposed to wake us up.
298 decky 173
             */
2701 jermar 174
            if (waitq_sleep_timeout(&ap_completion_wq, 1000000,
175
                SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT) {
176
                unsigned int cpu = (config.cpu_active > i) ?
177
                    config.cpu_active : i;
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                printf("%s: waiting for cpu%u (APIC ID = %d) "
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                    "timed out\n", __FUNCTION__, cpu,
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                    ops->cpu_apic_id(i));
2441 decky 181
            }
298 decky 182
        } else
2701 jermar 183
            printf("INIT IPI for l_apic%d failed\n",
184
                ops->cpu_apic_id(i));
128 jermar 185
    }
186
}
187
 
2101 decky 188
int smp_irq_to_pin(unsigned int irq)
512 jermar 189
{
190
    ASSERT(ops != NULL);
191
    return ops->irq_to_pin(irq);
192
}
193
 
458 decky 194
#endif /* CONFIG_SMP */
1702 cejka 195
 
1888 jermar 196
/** @}
1702 cejka 197
 */