| 0,0 → 1,198 |
|---|
| /* |
| * Copyright (c) 2008 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup ia32 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <smp/smp.h> |
| #include <arch/smp/smp.h> |
| #include <arch/smp/mps.h> |
| #include <arch/smp/ap.h> |
| #include <arch/boot/boot.h> |
| #include <genarch/acpi/acpi.h> |
| #include <genarch/acpi/madt.h> |
| #include <config.h> |
| #include <synch/waitq.h> |
| #include <synch/synch.h> |
| #include <arch/pm.h> |
| #include <func.h> |
| #include <panic.h> |
| #include <debug.h> |
| #include <arch/asm.h> |
| #include <mm/frame.h> |
| #include <mm/page.h> |
| #include <mm/slab.h> |
| #include <mm/as.h> |
| #include <print.h> |
| #include <memstr.h> |
| #include <arch/drivers/i8259.h> |
| |
| #ifdef CONFIG_SMP |
| |
| static struct smp_config_operations *ops = NULL; |
| |
| void smp_init(void) |
| { |
| uintptr_t l_apic_address, io_apic_address; |
| |
| if (acpi_madt) { |
| acpi_madt_parse(); |
| ops = &madt_config_operations; |
| } |
| if (config.cpu_count == 1) { |
| mps_init(); |
| ops = &mps_config_operations; |
| } |
| |
| l_apic_address = (uintptr_t) frame_alloc(ONE_FRAME, |
| FRAME_ATOMIC | FRAME_KA); |
| if (!l_apic_address) |
| panic("cannot allocate address for l_apic\n"); |
| |
| io_apic_address = (uintptr_t) frame_alloc(ONE_FRAME, |
| FRAME_ATOMIC | FRAME_KA); |
| if (!io_apic_address) |
| panic("cannot allocate address for io_apic\n"); |
| |
| if (config.cpu_count > 1) { |
| page_mapping_insert(AS_KERNEL, l_apic_address, |
| (uintptr_t) l_apic, PAGE_NOT_CACHEABLE | PAGE_WRITE); |
| page_mapping_insert(AS_KERNEL, io_apic_address, |
| (uintptr_t) io_apic, PAGE_NOT_CACHEABLE | PAGE_WRITE); |
| |
| l_apic = (uint32_t *) l_apic_address; |
| io_apic = (uint32_t *) io_apic_address; |
| } |
| } |
| |
| /* |
| * Kernel thread for bringing up application processors. It becomes clear |
| * that we need an arrangement like this (AP's being initialized by a kernel |
| * thread), for a thread has its dedicated stack. (The stack used during the |
| * BSP initialization (prior the very first call to scheduler()) will be used |
| * as an initialization stack for each AP.) |
| */ |
| void kmp(void *arg __attribute__((unused))) |
| { |
| unsigned int i; |
| |
| ASSERT(ops != NULL); |
| |
| /* |
| * We need to access data in frame 0. |
| * We boldly make use of kernel address space mapping. |
| */ |
| |
| /* |
| * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
| */ |
| *((uint16_t *) (PA2KA(0x467 + 0))) = |
| (uint16_t) (((uintptr_t) ap_boot) >> 4); /* segment */ |
| *((uint16_t *) (PA2KA(0x467 + 2))) = 0; /* offset */ |
| |
| /* |
| * Save 0xa to address 0xf of the CMOS RAM. |
| * BIOS will not do the POST after the INIT signal. |
| */ |
| outb(0x70, 0xf); |
| outb(0x71, 0xa); |
| |
| pic_disable_irqs(0xffff); |
| apic_init(); |
| |
| uint8_t apic = l_apic_id(); |
| |
| for (i = 0; i < ops->cpu_count(); i++) { |
| struct descriptor *gdt_new; |
| |
| /* |
| * Skip processors marked unusable. |
| */ |
| if (!ops->cpu_enabled(i)) |
| continue; |
| |
| /* |
| * The bootstrap processor is already up. |
| */ |
| if (ops->cpu_bootstrap(i)) |
| continue; |
| |
| if (ops->cpu_apic_id(i) == apic) { |
| printf("%s: bad processor entry #%u, will not send IPI " |
| "to myself\n", __FUNCTION__, i); |
| continue; |
| } |
| |
| /* |
| * Prepare new GDT for CPU in question. |
| */ |
| gdt_new = (struct descriptor *) malloc(GDT_ITEMS * |
| sizeof(struct descriptor), FRAME_ATOMIC); |
| if (!gdt_new) |
| panic("couldn't allocate memory for GDT\n"); |
| |
| memcpy(gdt_new, gdt, GDT_ITEMS * sizeof(struct descriptor)); |
| memsetb((uintptr_t)(&gdt_new[TSS_DES]), |
| sizeof(struct descriptor), 0); |
| protected_ap_gdtr.limit = GDT_ITEMS * sizeof(struct descriptor); |
| protected_ap_gdtr.base = KA2PA((uintptr_t) gdt_new); |
| gdtr.base = (uintptr_t) gdt_new; |
| |
| if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
| /* |
| * There may be just one AP being initialized at |
| * the time. After it comes completely up, it is |
| * supposed to wake us up. |
| */ |
| if (waitq_sleep_timeout(&ap_completion_wq, 1000000, |
| SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT) { |
| unsigned int cpu = (config.cpu_active > i) ? |
| config.cpu_active : i; |
| printf("%s: waiting for cpu%u (APIC ID = %d) " |
| "timed out\n", __FUNCTION__, cpu, |
| ops->cpu_apic_id(i)); |
| } |
| } else |
| printf("INIT IPI for l_apic%d failed\n", |
| ops->cpu_apic_id(i)); |
| } |
| } |
| |
| int smp_irq_to_pin(unsigned int irq) |
| { |
| ASSERT(ops != NULL); |
| return ops->irq_to_pin(irq); |
| } |
| |
| #endif /* CONFIG_SMP */ |
| |
| /** @} |
| */ |