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34 jermar 1
/*
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 * Copyright (C) 2005 Jakub Jermar
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 * 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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1702 cejka 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>
128 jermar 36
#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>
294 jermar 44
#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
34 jermar 59
 
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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{
1059 jermar 64
	int status;
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	__address l_apic_address, io_apic_address;
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34 jermar 67
	if (acpi_madt) {
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		acpi_madt_parse();
129 jermar 69
		ops = &madt_config_operations;
34 jermar 70
	}
128 jermar 71
	if (config.cpu_count == 1) {
34 jermar 72
		mps_init();
128 jermar 73
		ops = &mps_config_operations;
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	}
131 jermar 75
 
1059 jermar 76
	l_apic_address = PA2KA(PFN2ADDR(frame_alloc_rc(ONE_FRAME, FRAME_ATOMIC | FRAME_KA, &status)));
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	if (status != FRAME_OK)
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		panic("cannot allocate address for l_apic\n");
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	io_apic_address = PA2KA(PFN2ADDR(frame_alloc_rc(ONE_FRAME, FRAME_ATOMIC | FRAME_KA, &status)));
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	if (status != FRAME_OK)
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		panic("cannot allocate address for io_apic\n");
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277 palkovsky 84
	if (config.cpu_count > 1) {		
1059 jermar 85
		page_mapping_insert(AS_KERNEL, l_apic_address, (__address) l_apic, 
756 jermar 86
				  PAGE_NOT_CACHEABLE);
1059 jermar 87
		page_mapping_insert(AS_KERNEL, io_apic_address, (__address) io_apic,
756 jermar 88
				  PAGE_NOT_CACHEABLE);
1059 jermar 89
 
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		l_apic = (__u32 *) l_apic_address;
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		io_apic = (__u32 *) io_apic_address;
131 jermar 92
        }
34 jermar 93
}
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128 jermar 95
/*
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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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 */
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void kmp(void *arg)
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{
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	int i;
269 decky 105
 
128 jermar 106
	ASSERT(ops != NULL);
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108
	waitq_initialize(&ap_completion_wq);
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	/*
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	 * We need to access data in frame 0.
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	 * We boldly make use of kernel address space mapping.
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	 */
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	/*
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	 * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot()
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	 */
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	*((__u16 *) (PA2KA(0x467+0))) =  ((__address) ap_boot) >> 4;	/* segment */
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	*((__u16 *) (PA2KA(0x467+2))) =  0;				/* offset */
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	/*
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	 * 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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	 */
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	outb(0x70,0xf);
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	outb(0x71,0xa);
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128
	pic_disable_irqs(0xffff);
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	apic_init();
130
 
131
	for (i = 0; i < ops->cpu_count(); i++) {
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		struct descriptor *gdt_new;
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134
		/*
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		 * Skip processors marked unusable.
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		 */
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		if (!ops->cpu_enabled(i))
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			continue;
139
 
140
		/*
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		 * The bootstrap processor is already up.
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		 */
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		if (ops->cpu_bootstrap(i))
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			continue;
145
 
146
		if (ops->cpu_apic_id(i) == l_apic_id()) {
294 jermar 147
			printf("%s: bad processor entry #%d, will not send IPI to myself\n", __FUNCTION__, i);
128 jermar 148
			continue;
149
		}
150
 
151
		/*
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		 * Prepare new GDT for CPU in question.
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		 */
822 palkovsky 154
		if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor), FRAME_ATOMIC)))
128 jermar 155
			panic("couldn't allocate memory for GDT\n");
156
 
693 decky 157
		memcpy(gdt_new, gdt, GDT_ITEMS * sizeof(struct descriptor));
195 vana 158
		memsetb((__address)(&gdt_new[TSS_DES]), sizeof(struct descriptor), 0);
693 decky 159
		protected_ap_gdtr.limit = GDT_ITEMS * sizeof(struct descriptor);
160
		protected_ap_gdtr.base = KA2PA((__address) gdt_new);
269 decky 161
		gdtr.base = (__address) gdt_new;
128 jermar 162
 
163
		if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) {
164
			/*
298 decky 165
			 * There may be just one AP being initialized at
128 jermar 166
			 * the time. After it comes completely up, it is
167
			 * supposed to wake us up.
298 decky 168
			 */
1502 jermar 169
			if (waitq_sleep_timeout(&ap_completion_wq, 1000000, SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT)
294 jermar 170
				printf("%s: waiting for cpu%d (APIC ID = %d) timed out\n", __FUNCTION__, config.cpu_active > i ? config.cpu_active : i, ops->cpu_apic_id(i));
298 decky 171
		} else
128 jermar 172
			printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i));
173
	}
174
}
175
 
512 jermar 176
int smp_irq_to_pin(int irq)
177
{
178
	ASSERT(ops != NULL);
179
	return ops->irq_to_pin(irq);
180
}
181
 
458 decky 182
#endif /* CONFIG_SMP */
1702 cejka 183
 
184
 /** @}
185
 */
186