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 26 /* 27 * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode. 28 */ 29 void __init default_setup_apic_routing(void) 30 { 31 struct apic **drv; 32 33 enable_IR_x2apic(); 34 35 for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) { 36 if ((*drv)->probe && (*drv)->probe()) { 37 if (apic != *drv) { 38 apic = *drv; 39 pr_info("Switched APIC routing to %s.\n", 40 apic->name); 41 } 42 break; 43 } 44 } 45 46 if (x86_platform.apic_post_init) 47 x86_platform.apic_post_init(); 48 } 49 50 /* Same for both flat and physical. */ 51 52 void apic_send_IPI_self(int vector) 53 { 54 __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL); 55 } 56 57 int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id) 58 { 59 struct apic **drv; 60 61 for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) { 62 if ((*drv)->acpi_madt_oem_check(oem_id, oem_table_id)) { 63 if (apic != *drv) { 64 apic = *drv; 65 pr_info("Setting APIC routing to %s.\n", 66 apic->name); 67 } 68 return 1; 69 } 70 } 71 return 0; 72 } 73