path: root/arch/x86/kernel/mpparse_32.c

/*
 *	Intel Multiprocessor Specification 1.1 and 1.4
 *	compliant MP-table parsing routines.
 *
 *	(c) 1995 Alan Cox, Building #3 <alan@redhat.com>
 *	(c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
 *
 *	Fixes
 *		Erich Boleyn	:	MP v1.4 and additional changes.
 *		Alan Cox	:	Added EBDA scanning
 *		Ingo Molnar	:	various cleanups and rewrites
 *		Maciej W. Rozycki:	Bits for default MP configurations
 *		Paul Diefenbaugh:	Added full ACPI support
 */

#include <linux/mm.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/bootmem.h>
#include <linux/kernel_stat.h>
#include <linux/mc146818rtc.h>
#include <linux/bitops.h>

#include <asm/smp.h>
#include <asm/acpi.h>
#include <asm/mtrr.h>
#include <asm/mpspec.h>
#include <asm/io_apic.h>
#include <asm/bios_ebda.h>

#include <mach_apic.h>
#include <mach_apicdef.h>
#include <mach_mpparse.h>

/* Have we found an MP table */
int smp_found_config;

/*
 * Various Linux-internal data structures created from the
 * MP-table.
 */
#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
int mp_bus_id_to_type[MAX_MP_BUSSES];
#endif
DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
int mp_bus_id_to_pci_bus[MAX_MP_BUSSES] = {[0 ... MAX_MP_BUSSES - 1] = -1 };
static int mp_current_pci_id;

int pic_mode;

/*
 * Intel MP BIOS table parsing routines:
 */

/*
 * Checksum an MP configuration block.
 */

static int __init mpf_checksum(unsigned char *mp, int len)
{
	int sum = 0;

	while (len--)
		sum += *mp++;

	return sum & 0xFF;
}

#ifdef CONFIG_X86_NUMAQ
/*
 * Have to match translation table entries to main table entries by counter
 * hence the mpc_record variable .... can't see a less disgusting way of
 * doing this ....
 */

static int mpc_record;
static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY]
    __cpuinitdata;
#endif

static void __cpuinit MP_processor_info(struct mpc_config_processor *m)
{
	int apicid;
	char *bootup_cpu = "";

	if (!(m->mpc_cpuflag & CPU_ENABLED)) {
		disabled_cpus++;
		return;
	}
#ifdef CONFIG_X86_NUMAQ
	apicid = mpc_apic_id(m, translation_table[mpc_record]);
#else
	apicid = m->mpc_apicid;
#endif
	if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
		bootup_cpu = " (Bootup-CPU)";
		boot_cpu_physical_apicid = m->mpc_apicid;
	}

	printk(KERN_INFO "Processor #%d%s\n", m->mpc_apicid, bootup_cpu);
	generic_processor_info(apicid, m->mpc_apicver);
}

static void __init MP_bus_info(struct mpc_config_bus *m)
{
	char str[7];

	memcpy(str, m->mpc_bustype, 6);
	str[6] = 0;

#ifdef CONFIG_X86_NUMAQ
	mpc_oem_bus_info(m, str, translation_table[mpc_record]);
#else
	Dprintk("Bus #%d is %s\n", m->mpc_busid, str);
#endif

#if MAX_MP_BUSSES < 256
	if (m->mpc_busid >= MAX_MP_BUSSES) {
		printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
		       " is too large, max. supported is %d\n",
		       m->mpc_busid, str, MAX_MP_BUSSES - 1);
		return;
	}
#endif

	if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) {
		 set_bit(m->mpc_busid, mp_bus_not_pci);
#if defined(CONFIG_EISA) || defined (CONFIG_MCA)
		mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA;
#endif
	} else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
#ifdef CONFIG_X86_NUMAQ
		mpc_oem_pci_bus(m, translation_table[mpc_record]);
#endif
		clear_bit(m->mpc_busid, mp_bus_not_pci);
		mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id;
		mp_current_pci_id++;
#if defined(CONFIG_EISA) || defined (CONFIG_MCA)
		mp_bus_id_to_type[m->mpc_busid] = MP_BUS_PCI;
	} else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) {
		mp_bus_id_to_type[m->mpc_busid] = MP_BUS_EISA;
	} else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA) - 1) == 0) {
		mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
#endif
	} else
		printk(KERN_WARNING "Unknown bustype %s - ignoring\n", </