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;
unsigned int __cpuinitdata maxcpus = NR_CPUS;

/*
 * Various Linux-internal data structures created from the
 * MP-table.
 */
int apic_version [MAX_APICS];
#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;

/* I/O APIC entries */
struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];

/* # of MP IRQ source entries */
struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];

/* MP IRQ source entries */
int mp_irq_entries;

int nr_ioapics;

int pic_mode;
unsigned long mp_lapic_addr;

unsigned int def_to_bigsmp = 0;

/* Processor that is doing the boot up */
unsigned int boot_cpu_physical_apicid = -1U;
/* Internal processor count */
unsigned int num_processors;

unsigned disabled_cpus __cpuinitdata;

/* Bitmask of physically existing CPUs */
physid_mask_t phys_cpu_present_map;

#ifndef CONFIG_SMP
DEFINE_PER_CPU(u16, x86_bios_cpu_apicid) = BAD_APICID;
#endif

/*
 * 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 ver, apicid, cpu;
	cpumask_t tmp_map;
	physid_mask_t phys_cpu;
 	
	if (!(m->mpc_cpuflag & CPU_ENABLED)) {
		disabled_cpus++;
		return;
	}

#ifdef CONFIG_X86_NUMAQ
	apicid = mpc_apic_id(m, translation_table[mpc_record]);
#else
	Dprintk("Processor #%d %u:%u APIC version %d\n",
		m->mpc_apicid,
		(m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
		(m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
		m->mpc_apicver);
	apicid = m->mpc_apicid;
#endif

	if (m->mpc_featureflag&(1<<0))
		Dprintk("    Floating point unit present.\n");
	if (m->mpc_featureflag&(1<<7))
		Dprintk("    Machine Exception supported.\n");
	if (m->mpc_featureflag&(1<<8))
		Dprintk("    64 bit compare & exchange supported.\n