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103 lines
2.3 KiB
103 lines
2.3 KiB
20 years ago
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/* Copyright 2003 Andi Kleen, SuSE Labs.
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* Subject to the GNU Public License, v.2
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*
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* Generic x86 APIC driver probe layer.
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*/
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#include <linux/config.h>
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/ctype.h>
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#include <linux/init.h>
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#include <asm/fixmap.h>
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#include <asm/mpspec.h>
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#include <asm/apicdef.h>
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#include <asm/genapic.h>
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extern struct genapic apic_summit;
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extern struct genapic apic_bigsmp;
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extern struct genapic apic_es7000;
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extern struct genapic apic_default;
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struct genapic *genapic = &apic_default;
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struct genapic *apic_probe[] __initdata = {
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&apic_summit,
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&apic_bigsmp,
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&apic_es7000,
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&apic_default, /* must be last */
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NULL,
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};
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void __init generic_apic_probe(char *command_line)
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{
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char *s;
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int i;
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int changed = 0;
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s = strstr(command_line, "apic=");
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if (s && (s == command_line || isspace(s[-1]))) {
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char *p = strchr(s, ' '), old;
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if (!p)
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p = strchr(s, '\0');
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old = *p;
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*p = 0;
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for (i = 0; !changed && apic_probe[i]; i++) {
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if (!strcmp(apic_probe[i]->name, s+5)) {
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changed = 1;
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genapic = apic_probe[i];
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}
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}
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if (!changed)
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printk(KERN_ERR "Unknown genapic `%s' specified.\n", s);
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*p = old;
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}
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for (i = 0; !changed && apic_probe[i]; i++) {
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if (apic_probe[i]->probe()) {
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changed = 1;
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genapic = apic_probe[i];
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}
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}
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/* Not visible without early console */
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if (!changed)
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panic("Didn't find an APIC driver");
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printk(KERN_INFO "Using APIC driver %s\n", genapic->name);
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}
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/* These functions can switch the APIC even after the initial ->probe() */
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int __init mps_oem_check(struct mp_config_table *mpc, char *oem, char *productid)
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{
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int i;
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for (i = 0; apic_probe[i]; ++i) {
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if (apic_probe[i]->mps_oem_check(mpc,oem,productid)) {
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genapic = apic_probe[i];
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printk(KERN_INFO "Switched to APIC driver `%s'.\n",
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genapic->name);
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return 1;
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}
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}
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return 0;
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}
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int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
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{
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int i;
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for (i = 0; apic_probe[i]; ++i) {
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if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) {
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genapic = apic_probe[i];
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printk(KERN_INFO "Switched to APIC driver `%s'.\n",
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genapic->name);
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return 1;
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}
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}
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return 0;
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}
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int hard_smp_processor_id(void)
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{
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return genapic->get_apic_id(*(unsigned long *)(APIC_BASE+APIC_ID));
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}
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