| /* |
| * Copyright 2004 James Cleverdon, IBM. |
| * Subject to the GNU Public License, v.2 |
| * |
| * Generic APIC sub-arch probe layer. |
| * |
| * Hacked for x86-64 by James Cleverdon from i386 architecture code by |
| * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and |
| * James Cleverdon. |
| */ |
| #include <linux/threads.h> |
| #include <linux/cpumask.h> |
| #include <linux/string.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/ctype.h> |
| #include <linux/init.h> |
| #include <linux/hardirq.h> |
| #include <linux/dmar.h> |
| |
| #include <asm/smp.h> |
| #include <asm/ipi.h> |
| #include <asm/genapic.h> |
| #include <asm/setup.h> |
| |
| extern struct genapic apic_flat; |
| extern struct genapic apic_physflat; |
| extern struct genapic apic_x2xpic_uv_x; |
| extern struct genapic apic_x2apic_phys; |
| extern struct genapic apic_x2apic_cluster; |
| |
| struct genapic __read_mostly *apic = &apic_flat; |
| |
| static struct genapic *apic_probe[] __initdata = { |
| #ifdef CONFIG_X86_UV |
| &apic_x2apic_uv_x, |
| #endif |
| #ifdef CONFIG_X86_X2APIC |
| &apic_x2apic_phys, |
| &apic_x2apic_cluster, |
| #endif |
| &apic_physflat, |
| NULL, |
| }; |
| |
| /* |
| * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode. |
| */ |
| void __init default_setup_apic_routing(void) |
| { |
| #ifdef CONFIG_X86_X2APIC |
| if (apic == &apic_x2apic_phys || apic == &apic_x2apic_cluster) { |
| if (!intr_remapping_enabled) |
| apic = &apic_flat; |
| } |
| #endif |
| |
| if (apic == &apic_flat) { |
| if (max_physical_apicid >= 8) |
| apic = &apic_physflat; |
| printk(KERN_INFO "Setting APIC routing to %s\n", apic->name); |
| } |
| |
| if (x86_quirks->update_genapic) |
| x86_quirks->update_genapic(); |
| } |
| |
| /* Same for both flat and physical. */ |
| |
| void apic_send_IPI_self(int vector) |
| { |
| __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL); |
| } |
| |
| int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id) |
| { |
| int i; |
| |
| for (i = 0; apic_probe[i]; ++i) { |
| if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) { |
| apic = apic_probe[i]; |
| printk(KERN_INFO "Setting APIC routing to %s.\n", |
| apic->name); |
| return 1; |
| } |
| } |
| return 0; |
| } |