[net-next-2.6.git] / arch / x86 / kernel / sfi.c

/*
 * sfi.c - x86 architecture SFI support.
 *
 * Copyright (c) 2009, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 */

#define KMSG_COMPONENT "SFI"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/acpi.h>
#include <linux/init.h>
#include <linux/sfi.h>
#include <linux/io.h>

#include <asm/io_apic.h>
#include <asm/mpspec.h>
#include <asm/setup.h>
#include <asm/apic.h>

#ifdef CONFIG_X86_LOCAL_APIC
static unsigned long sfi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;

static void __init mp_sfi_register_lapic_address(unsigned long address)
{
	mp_lapic_addr = address;

	set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
	if (boot_cpu_physical_apicid == -1U)
		boot_cpu_physical_apicid = read_apic_id();

	pr_info("Boot CPU = %d\n", boot_cpu_physical_apicid);
}

/* All CPUs enumerated by SFI must be present and enabled */
static void __cpuinit mp_sfi_register_lapic(u8 id)
{
	if (MAX_APICS - id <= 0) {
		pr_warning("Processor #%d invalid (max %d)\n",
			id, MAX_APICS);
		return;
	}

	pr_info("registering lapic[%d]\n", id);

	generic_processor_info(id, GET_APIC_VERSION(apic_read(APIC_LVR)));
}

static int __init sfi_parse_cpus(struct sfi_table_header *table)
{
	struct sfi_table_simple *sb;
	struct sfi_cpu_table_entry *pentry;
	int i;
	int cpu_num;

	sb = (struct sfi_table_simple *)table;
	cpu_num = SFI_GET_NUM_ENTRIES(sb, struct sfi_cpu_table_entry);
	pentry = (struct sfi_cpu_table_entry *)sb->pentry;

	for (i = 0; i < cpu_num; i++) {
		mp_sfi_register_lapic(pentry->apic_id);
		pentry++;
	}

	smp_found_config = 1;
	return 0;
}
#endif /* CONFIG_X86_LOCAL_APIC */

#ifdef CONFIG_X86_IO_APIC

static int __init sfi_parse_ioapic(struct sfi_table_header *table)
{
	struct sfi_table_simple *sb;
	struct sfi_apic_table_entry *pentry;
	int i, num;

	sb = (struct sfi_table_simple *)table;
	num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry);
	pentry = (struct sfi_apic_table_entry *)sb->pentry;

	for (i = 0; i < num; i++) {
		mp_register_ioapic(i, pentry->phys_addr, gsi_top);
		pentry++;
	}

	WARN(pic_mode, KERN_WARNING
		"SFI: pic_mod shouldn't be 1 when IOAPIC table is present\n");
	pic_mode = 0;
	return 0;
}
#endif /* CONFIG_X86_IO_APIC */

/*
 * sfi_platform_init(): register lapics & io-apics
 */
int __init sfi_platform_init(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
	mp_sfi_register_lapic_address(sfi_lapic_addr);
	sfi_table_parse(SFI_SIG_CPUS, NULL, NULL, sfi_parse_cpus);
#endif
#ifdef CONFIG_X86_IO_APIC
	sfi_table_parse(SFI_SIG_APIC, NULL, NULL, sfi_parse_ioapic);
#endif
	return 0;
}
Commit	Line	Data
efafc8b2 FT	1	/*
	2	* sfi.c - x86 architecture SFI support.
	3	*
	4	* Copyright (c) 2009, Intel Corporation.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along with
	16	* this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
	18	*
	19	*/
	20
	21	#define KMSG_COMPONENT "SFI"
	22	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
	23
efafc8b2 FT	24	#include <linux/acpi.h>
efafc8b2 FT	25	#include <linux/init.h>
efafc8b2 FT	26	#include <linux/sfi.h>
	27	#include <linux/io.h>
	28
	29	#include <asm/io_apic.h>
efafc8b2 FT	30	#include <asm/mpspec.h>
	31	#include <asm/setup.h>
	32	#include <asm/apic.h>
efafc8b2 FT	33
	34	#ifdef CONFIG_X86_LOCAL_APIC
	35	static unsigned long sfi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
	36
940b3c7b	37	static void __init mp_sfi_register_lapic_address(unsigned long address)
efafc8b2 FT	38	{
	39	mp_lapic_addr = address;
	40
	41	set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
	42	if (boot_cpu_physical_apicid == -1U)
	43	boot_cpu_physical_apicid = read_apic_id();
	44
	45	pr_info("Boot CPU = %d\n", boot_cpu_physical_apicid);
	46	}
	47
	48	/* All CPUs enumerated by SFI must be present and enabled */
940b3c7b	49	static void __cpuinit mp_sfi_register_lapic(u8 id)
efafc8b2	50	{
efafc8b2 FT	51	if (MAX_APICS - id <= 0) {
	52	pr_warning("Processor #%d invalid (max %d)\n",
	53	id, MAX_APICS);
	54	return;
	55	}
	56
efafc8b2 FT	57	pr_info("registering lapic[%d]\n", id);
	58
	59	generic_processor_info(id, GET_APIC_VERSION(apic_read(APIC_LVR)));
	60	}
	61
	62	static int __init sfi_parse_cpus(struct sfi_table_header *table)
	63	{
	64	struct sfi_table_simple *sb;
	65	struct sfi_cpu_table_entry *pentry;
	66	int i;
	67	int cpu_num;
	68
	69	sb = (struct sfi_table_simple *)table;
	70	cpu_num = SFI_GET_NUM_ENTRIES(sb, struct sfi_cpu_table_entry);
	71	pentry = (struct sfi_cpu_table_entry *)sb->pentry;
	72
	73	for (i = 0; i < cpu_num; i++) {
	74	mp_sfi_register_lapic(pentry->apic_id);
	75	pentry++;
	76	}
	77
	78	smp_found_config = 1;
	79	return 0;
	80	}
	81	#endif /* CONFIG_X86_LOCAL_APIC */
	82
	83	#ifdef CONFIG_X86_IO_APIC
efafc8b2 FT	84
	85	static int __init sfi_parse_ioapic(struct sfi_table_header *table)
	86	{
	87	struct sfi_table_simple *sb;
	88	struct sfi_apic_table_entry *pentry;
	89	int i, num;
	90
	91	sb = (struct sfi_table_simple *)table;
	92	num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry);
	93	pentry = (struct sfi_apic_table_entry *)sb->pentry;
	94
	95	for (i = 0; i < num; i++) {
a4384df3	96	mp_register_ioapic(i, pentry->phys_addr, gsi_top);
efafc8b2 FT	97	pentry++;
	98	}
	99
	100	WARN(pic_mode, KERN_WARNING
	101	"SFI: pic_mod shouldn't be 1 when IOAPIC table is present\n");
	102	pic_mode = 0;
	103	return 0;
	104	}
	105	#endif /* CONFIG_X86_IO_APIC */
	106
	107	/*
	108	* sfi_platform_init(): register lapics & io-apics
	109	*/
	110	int __init sfi_platform_init(void)
	111	{
	112	#ifdef CONFIG_X86_LOCAL_APIC
	113	mp_sfi_register_lapic_address(sfi_lapic_addr);
	114	sfi_table_parse(SFI_SIG_CPUS, NULL, NULL, sfi_parse_cpus);
	115	#endif
	116	#ifdef CONFIG_X86_IO_APIC
	117	sfi_table_parse(SFI_SIG_APIC, NULL, NULL, sfi_parse_ioapic);
	118	#endif
	119	return 0;
	120	}