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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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#include <smp/smp.h>
128 jermar 30
#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 33
#include <arch/boot/boot.h>
452 decky 34
#include <genarch/acpi/acpi.h>
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#include <genarch/acpi/madt.h>
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#include <config.h>
128 jermar 37
#include <synch/waitq.h>
294 jermar 38
#include <synch/synch.h>
128 jermar 39
#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 46
#include <mm/slab.h>
755 jermar 47
#include <mm/as.h>
195 vana 48
#include <print.h>
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#include <memstr.h>
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#include <arch/i8259.h>
34 jermar 51
 
458 decky 52
#ifdef CONFIG_SMP
34 jermar 53
 
128 jermar 54
static struct smp_config_operations *ops = NULL;
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34 jermar 56
void smp_init(void)
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{
1059 jermar 58
	int status;
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	__address l_apic_address, io_apic_address;
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34 jermar 61
	if (acpi_madt) {
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		acpi_madt_parse();
129 jermar 63
		ops = &madt_config_operations;
34 jermar 64
	}
128 jermar 65
	if (config.cpu_count == 1) {
34 jermar 66
		mps_init();
128 jermar 67
		ops = &mps_config_operations;
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	}
131 jermar 69
 
1059 jermar 70
	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 78
	if (config.cpu_count > 1) {		
1059 jermar 79
		page_mapping_insert(AS_KERNEL, l_apic_address, (__address) l_apic, 
756 jermar 80
				  PAGE_NOT_CACHEABLE);
1059 jermar 81
		page_mapping_insert(AS_KERNEL, io_apic_address, (__address) io_apic,
756 jermar 82
				  PAGE_NOT_CACHEABLE);
1059 jermar 83
 
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		l_apic = (__u32 *) l_apic_address;
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		io_apic = (__u32 *) io_apic_address;
131 jermar 86
        }
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        /* 
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         * Must be initialized outside the kmp thread, since it is waited
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         * on before the kmp thread is created.
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         */
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        waitq_initialize(&kmp_completion_wq);
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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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 */
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void kmp(void *arg)
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{
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	int i;
269 decky 106
 
128 jermar 107
	ASSERT(ops != NULL);
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	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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	pic_disable_irqs(0xffff);
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	apic_init();
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	for (i = 0; i < ops->cpu_count(); i++) {
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		struct descriptor *gdt_new;
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		/*
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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;
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		/*
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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;
146
 
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		if (ops->cpu_apic_id(i) == l_apic_id()) {
294 jermar 148
			printf("%s: bad processor entry #%d, will not send IPI to myself\n", __FUNCTION__, i);
128 jermar 149
			continue;
150
		}
151
 
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		/*
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		 * Prepare new GDT for CPU in question.
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		 */
822 palkovsky 155
		if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor), FRAME_ATOMIC)))
128 jermar 156
			panic("couldn't allocate memory for GDT\n");
157
 
693 decky 158
		memcpy(gdt_new, gdt, GDT_ITEMS * sizeof(struct descriptor));
195 vana 159
		memsetb((__address)(&gdt_new[TSS_DES]), sizeof(struct descriptor), 0);
693 decky 160
		protected_ap_gdtr.limit = GDT_ITEMS * sizeof(struct descriptor);
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		protected_ap_gdtr.base = KA2PA((__address) gdt_new);
269 decky 162
		gdtr.base = (__address) gdt_new;
128 jermar 163
 
164
		if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) {
165
			/*
298 decky 166
			 * There may be just one AP being initialized at
128 jermar 167
			 * the time. After it comes completely up, it is
168
			 * supposed to wake us up.
298 decky 169
			 */
294 jermar 170
			if (waitq_sleep_timeout(&ap_completion_wq, 1000000, SYNCH_BLOCKING) == ESYNCH_TIMEOUT)
171
				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 172
		} else
128 jermar 173
			printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i));
174
	}
175
 
176
	/*
177
	 * Wakeup the kinit thread so that
178
	 * system initialization can go on.
179
	 */
180
	waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST);
181
}
182
 
512 jermar 183
int smp_irq_to_pin(int irq)
184
{
185
	ASSERT(ops != NULL);
186
	return ops->irq_to_pin(irq);
187
}
188
 
458 decky 189
#endif /* CONFIG_SMP */