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/*
* 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/apic.h>
#include <asm/ipi.h>
#include <asm/setup.h>
extern struct apic apic_flat;
extern struct apic apic_physflat;
extern struct apic apic_x2xpic_uv_x;
extern struct apic apic_x2apic_phys;
extern struct apic apic_x2apic_cluster;
struct apic __read_mostly *apic = &apic_flat;
EXPORT_SYMBOL_GPL(apic);
static struct apic *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,
};
static int apicid_phys_pkg_id(int initial_apic_id, int index_msb)
{
return hard_smp_processor_id() >> index_msb;
}
/*
* Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
*/
void __init default_setup_apic_routing(void)
{
enable_IR_x2apic();
#ifdef CONFIG_X86_X2APIC
if (x2apic_mode
#ifdef CONFIG_X86_UV
&& apic != &apic_x2apic_uv_x
#endif
) {
if (x2apic_phys)
apic = &apic_x2apic_phys;
else
apic = &apic_x2apic_cluster;
}
#endif
if (apic == &apic_flat && num_possible_cpus() > 8)
apic = &apic_physflat;
printk(KERN_INFO "Setting APIC routing to %s\n", apic->name);
if (is_vsmp_box()) {
/* need to update phys_pkg_id */
apic->phys_pkg_id = apicid_phys_pkg_id;
}
}
/* 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;
}
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