128 lines
2.8 KiB
C
128 lines
2.8 KiB
C
/* Copyright 2003 Andi Kleen, SuSE Labs.
|
|
* Subject to the GNU Public License, v.2
|
|
*
|
|
* Generic x86 APIC driver probe layer.
|
|
*/
|
|
#include <linux/threads.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <asm/fixmap.h>
|
|
#include <asm/mpspec.h>
|
|
#include <asm/apicdef.h>
|
|
#include <asm/genapic.h>
|
|
|
|
extern struct genapic apic_summit;
|
|
extern struct genapic apic_bigsmp;
|
|
extern struct genapic apic_es7000;
|
|
extern struct genapic apic_default;
|
|
|
|
struct genapic *genapic = &apic_default;
|
|
|
|
struct genapic *apic_probe[] __initdata = {
|
|
&apic_summit,
|
|
&apic_bigsmp,
|
|
&apic_es7000,
|
|
&apic_default, /* must be last */
|
|
NULL,
|
|
};
|
|
|
|
static int cmdline_apic __initdata;
|
|
static int __init parse_apic(char *arg)
|
|
{
|
|
int i;
|
|
|
|
if (!arg)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; apic_probe[i]; i++) {
|
|
if (!strcmp(apic_probe[i]->name, arg)) {
|
|
genapic = apic_probe[i];
|
|
cmdline_apic = 1;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Parsed again by __setup for debug/verbose */
|
|
return 0;
|
|
}
|
|
early_param("apic", parse_apic);
|
|
|
|
void __init generic_bigsmp_probe(void)
|
|
{
|
|
/*
|
|
* This routine is used to switch to bigsmp mode when
|
|
* - There is no apic= option specified by the user
|
|
* - generic_apic_probe() has choosen apic_default as the sub_arch
|
|
* - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
|
|
*/
|
|
|
|
if (!cmdline_apic && genapic == &apic_default)
|
|
if (apic_bigsmp.probe()) {
|
|
genapic = &apic_bigsmp;
|
|
printk(KERN_INFO "Overriding APIC driver with %s\n",
|
|
genapic->name);
|
|
}
|
|
}
|
|
|
|
void __init generic_apic_probe(void)
|
|
{
|
|
if (!cmdline_apic) {
|
|
int i;
|
|
for (i = 0; apic_probe[i]; i++) {
|
|
if (apic_probe[i]->probe()) {
|
|
genapic = apic_probe[i];
|
|
break;
|
|
}
|
|
}
|
|
/* Not visible without early console */
|
|
if (!apic_probe[i])
|
|
panic("Didn't find an APIC driver");
|
|
}
|
|
printk(KERN_INFO "Using APIC driver %s\n", genapic->name);
|
|
}
|
|
|
|
/* These functions can switch the APIC even after the initial ->probe() */
|
|
|
|
int __init mps_oem_check(struct mp_config_table *mpc, char *oem, char *productid)
|
|
{
|
|
int i;
|
|
for (i = 0; apic_probe[i]; ++i) {
|
|
if (apic_probe[i]->mps_oem_check(mpc,oem,productid)) {
|
|
if (!cmdline_apic) {
|
|
genapic = apic_probe[i];
|
|
printk(KERN_INFO "Switched to APIC driver `%s'.\n",
|
|
genapic->name);
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int __init 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)) {
|
|
if (!cmdline_apic) {
|
|
genapic = apic_probe[i];
|
|
printk(KERN_INFO "Switched to APIC driver `%s'.\n",
|
|
genapic->name);
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
int hard_smp_processor_id(void)
|
|
{
|
|
return genapic->get_apic_id(*(unsigned long *)(APIC_BASE+APIC_ID));
|
|
}
|
|
#endif
|