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

/*
 *	Intel Multiprocessor Specification 1.1 and 1.4
 *	compliant MP-table parsing routines.
 *
 *	(c) 1995 Alan Cox, Building #3 <alan@lxorguk.ukuu.org.uk>
 *	(c) 1998, 1999, 2000, 2009 Ingo Molnar <mingo@redhat.com>
 *      (c) 2008 Alexey Starikovskiy <astarikovskiy@suse.de>
 */

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

#include <asm/mtrr.h>
#include <asm/mpspec.h>
#include <asm/pgalloc.h>
#include <asm/io_apic.h>
#include <asm/proto.h>
#include <asm/bios_ebda.h>
#include <asm/e820.h>
#include <asm/trampoline.h>
#include <asm/setup.h>
#include <asm/smp.h>

#include <asm/apic.h>
/*
 * 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;
}

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

	if (!(m->cpuflag & CPU_ENABLED)) {
		disabled_cpus++;
		return;
	}

	if (x86_quirks->mpc_apic_id)
		apicid = x86_quirks->mpc_apic_id(m);
	else
		apicid = m->apicid;

	if (m->cpuflag & CPU_BOOTPROCESSOR) {
		bootup_cpu = " (Bootup-CPU)";
		boot_cpu_physical_apicid = m->apicid;
	}

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

#ifdef CONFIG_X86_IO_APIC
static void __init MP_bus_info(struct mpc_bus *m)
{
	char str[7];
	memcpy(str, m->bustype, 6);
	str[6] = 0;

	if (x86_quirks->mpc_oem_bus_info)
		x86_quirks->mpc_oem_bus_info(m, str);
	else
		apic_printk(APIC_VERBOSE, "Bus #%d is %s\n", m->busid, str);

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

	if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) {
		set_bit(m->busid, mp_bus_not_pci);
#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
		mp_bus_id_to_type[m->busid] = MP_BUS_ISA;
#endif
	} else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
		if (x86_quirks->mpc_oem_pci_bus)
			x86_quirks->mpc_oem_pci_bus(m);

		clear_bit(m->busid, mp_bus_not_pci);
#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
		mp_bus_id_to_type[m->busid] = MP_BUS_PCI;
	} else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) {
		mp_bus_id_to_type[m->busid] = MP_BUS_EISA;
	} else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA) - 1) == 0) {
		mp_bus_id_to_type[m->busid] = MP_BUS_MCA;
#endif
	} else
		printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
}

static int bad_ioapic(unsigned long address)
{
	if (nr_ioapics >= MAX_IO_APICS) {
		printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
		       "(found %d)\n", MAX_IO_APICS, nr_ioapics);
		panic("Recompile kernel with bigger MAX_IO_APICS!\n");
	}
	if (!address) {
		printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
		       " found in table, skipping!\n");
		return