1/* 2 * Copyright 2004 James Cleverdon, IBM. 3 * Subject to the GNU Public License, v.2 4 * 5 * Generic APIC sub-arch probe layer. 6 * 7 * Hacked for x86-64 by James Cleverdon from i386 architecture code by 8 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and 9 * James Cleverdon. 10 */ 11#include <linux/threads.h> 12#include <linux/cpumask.h> 13#include <linux/string.h> 14#include <linux/module.h> 15#include <linux/kernel.h> 16#include <linux/ctype.h> 17#include <linux/init.h> 18#include <linux/hardirq.h> 19#include <linux/dmar.h> 20 21#include <asm/smp.h> 22#include <asm/apic.h> 23#include <asm/ipi.h> 24#include <asm/setup.h> 25 26extern struct apic apic_flat; 27extern struct apic apic_physflat; 28extern struct apic apic_x2xpic_uv_x; 29extern struct apic apic_x2apic_phys; 30extern struct apic apic_x2apic_cluster; 31 32struct apic __read_mostly *apic = &apic_flat; 33EXPORT_SYMBOL_GPL(apic); 34 35static struct apic *apic_probe[] __initdata = { 36#ifdef CONFIG_X86_UV 37 &apic_x2apic_uv_x, 38#endif 39#ifdef CONFIG_X86_X2APIC 40 &apic_x2apic_phys, 41 &apic_x2apic_cluster, 42#endif 43 &apic_physflat, 44 NULL, 45}; 46 47static int apicid_phys_pkg_id(int initial_apic_id, int index_msb) 48{ 49 return hard_smp_processor_id() >> index_msb; 50} 51 52/* 53 * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode. 54 */ 55void __init default_setup_apic_routing(void) 56{ 57#ifdef CONFIG_X86_X2APIC 58 if (x2apic_mode 59#ifdef CONFIG_X86_UV 60 && apic != &apic_x2apic_uv_x 61#endif 62 ) { 63 if (x2apic_phys) 64 apic = &apic_x2apic_phys; 65 else 66 apic = &apic_x2apic_cluster; 67 } 68#endif 69 70 if (apic == &apic_flat && num_possible_cpus() > 8) 71 apic = &apic_physflat; 72 73 printk(KERN_INFO "Setting APIC routing to %s\n", apic->name); 74 75 if (is_vsmp_box()) { 76 /* need to update phys_pkg_id */ 77 apic->phys_pkg_id = apicid_phys_pkg_id; 78 } 79} 80 81/* Same for both flat and physical. */ 82 83void apic_send_IPI_self(int vector) 84{ 85 __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL); 86} 87 88int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id) 89{ 90 int i; 91 92 for (i = 0; apic_probe[i]; ++i) { 93 if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) { 94 apic = apic_probe[i]; 95 printk(KERN_INFO "Setting APIC routing to %s.\n", 96 apic->name); 97 return 1; 98 } 99 } 100 return 0; 101} 102