[mirror_ubuntu-artful-kernel.git] / drivers / acpi / tables.c

/*
 *  acpi_tables.c - ACPI Boot-Time Table Parsing
 *
 *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/smp.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/irq.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/bootmem.h>

#define PREFIX			"ACPI: "

#define ACPI_MAX_TABLES		128

static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };

static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;

static int acpi_apic_instance __initdata;

void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
{
	if (!header)
		return;

	switch (header->type) {

	case ACPI_MADT_TYPE_LOCAL_APIC:
		{
			struct acpi_madt_local_apic *p =
			    (struct acpi_madt_local_apic *)header;
			printk(KERN_INFO PREFIX
			       "LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
			       p->processor_id, p->id,
			       (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
		}
		break;

	case ACPI_MADT_TYPE_IO_APIC:
		{
			struct acpi_madt_io_apic *p =
			    (struct acpi_madt_io_apic *)header;
			printk(KERN_INFO PREFIX
			       "IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
			       p->id, p->address, p->global_irq_base);
		}
		break;

	case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
		{
			struct acpi_madt_interrupt_override *p =
			    (struct acpi_madt_interrupt_override *)header;
			printk(KERN_INFO PREFIX
			       "INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
			       p->bus, p->source_irq, p->global_irq,
			       mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
			       mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
			if (p->inti_flags  &
			    ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
				printk(KERN_INFO PREFIX
				       "INT_SRC_OVR unexpected reserved flags: 0x%x\n",
				       p->inti_flags  &
					~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));

		}
		break;

	case ACPI_MADT_TYPE_NMI_SOURCE:
		{
			struct acpi_madt_nmi_source *p =
			    (struct acpi_madt_nmi_source *)header;
			printk(KERN_INFO PREFIX
			       "NMI_SRC (%s %s global_irq %d)\n",
			       mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
			       mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
			       p->global_irq);
		}
		break;

	case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
		{
			struct acpi_madt_local_apic_nmi *p =
			    (struct acpi_madt_local_apic_nmi *)header;
			printk(KERN_INFO PREFIX
			       "LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
			       p->processor_id,
			       mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK	],
			       mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
			       p->lint);
		}
		break;

	case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
		{
			struct acpi_madt_local_apic_override *p =
			    (struct acpi_madt_local_apic_override *)header;
			printk(KERN_INFO PREFIX
			       "LAPIC_ADDR_OVR (address[%p])\n",
			       (void *)(unsigned long)p->address);
		}
		break;

	case ACPI_MADT_TYPE_IO_SAPIC:
		{
			struct acpi_madt_io_sapic *p =
			    (struct acpi_madt_io_sapic *)header;
			printk(KERN_INFO PREFIX
			       "IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
			       p->id, (void *)(unsigned long)p->address,
			       p->global_irq_base);
		}
		break;

	case ACPI_MADT_TYPE_LOCAL_SAPIC:
		{
			struct acpi_madt_local_sapic *p =
			    (struct acpi_madt_local_sapic *)header;
			printk(KERN_INFO PREFIX
			       "LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
			       p->processor_id, p->id, p->eid,
			       (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
		}
		break;

	case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
		{
			struct acpi_madt_interrupt_source *p =
			    (struct acpi_madt_interrupt_source *)header;
			printk(KERN_INFO PREFIX
			       "PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
			       mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
			       mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
			       p->type, p->id, p->eid, p->io_sapic_vector,
			       p->global_irq);
		}
		break;

	default:
		printk(KERN_WARNING PREFIX
		       "Found unsupported MADT entry (type = 0x%x)\n",
		       header->type);
		break;
	}
}


int __init
acpi_table_parse_entries(char *id,
			     unsigned long table_size,
			     int entry_id,
			     acpi_table_entry_handler handler,
			     unsigned int max_entries)
{
	struct acpi_table_header *table_header = NULL;
	struct acpi_subtable_header *entry;
	unsigned int count = 0;
	unsigned long table_end;

	if (!handler)
		return -EINVAL;

	if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
		acpi_get_table(id, acpi_apic_instance, &table_header);
	else
		acpi_get_table(id, 0, &table_header);

	if (!table_header) {
		printk(KERN_WARNING PREFIX "%4.4s not present\n", id);
		return -ENODEV;
	}

	table_end = (unsigned long)table_header + table_header->length;

	/* Parse all entries looking for a match. */

	entry = (struct acpi_subtable_header *)
	    ((unsigned long)table_header + table_size);

	while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
	       table_end) {
		if (entry->type == entry_id
		    && (!max_entries || count++ < max_entries))
			if (handler(entry, table_end))
				return -EINVAL;

		entry = (struct acpi_subtable_header *)
		    ((unsigned long)entry + entry->length);
	}
	if (max_entries && count > max_entries) {
		printk(KERN_WARNING PREFIX "[%4.4s:0x%02x] ignored %i entries of "
		       "%i found\n", id, entry_id, count - max_entries, count);
	}

	return count;
}

int __init
acpi_table_parse_madt(enum acpi_madt_type id,
		      acpi_table_entry_handler handler, unsigned int max_entries)
{
	return acpi_table_parse_entries(ACPI_SIG_MADT,
					    sizeof(struct acpi_table_madt), id,
					    handler, max_entries);
}

/**
 * acpi_table_parse - find table with @id, run @handler on it
 *
 * @id: table id to find
 * @handler: handler to run
 *
 * Scan the ACPI System Descriptor Table (STD) for a table matching @id,
 * run @handler on it.  Return 0 if table found, return on if not.
 */
int __init acpi_table_parse(char *id, acpi_table_handler handler)
{
	struct acpi_table_header *table = NULL;

	if (!handler)
		return -EINVAL;

	if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
		acpi_get_table(id, acpi_apic_instance, &table);
	else
		acpi_get_table(id, 0, &table);

	if (table) {
		handler(table);
		return 0;
	} else
		return 1;
}

/* 
 * The BIOS is supposed to supply a single APIC/MADT,
 * but some report two.  Provide a knob to use either.
 * (don't you wish instance 0 and 1 were not the same?)
 */
static void __init check_multiple_madt(void)
{
	struct acpi_table_header *table = NULL;

	acpi_get_table(ACPI_SIG_MADT, 2, &table);
	if (table) {
		printk(KERN_WARNING PREFIX
		       "BIOS bug: multiple APIC/MADT found,"
		       " using %d\n", acpi_apic_instance);
		printk(KERN_WARNING PREFIX
		       "If \"acpi_apic_instance=%d\" works better, "
		       "notify linux-acpi@vger.kernel.org\n",
		       acpi_apic_instance ? 0 : 2);

	} else
		acpi_apic_instance = 0;

	return;
}

/*
 * acpi_table_init()
 *
 * find RSDP, find and checksum SDT/XSDT.
 * checksum all tables, print SDT/XSDT
 *
 * result: sdt_entry[] is initialized
 */

int __init acpi_table_init(void)
{
	acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
	check_multiple_madt();
	return 0;
}

static int __init acpi_parse_apic_instance(char *str)
{

	acpi_apic_instance = simple_strtoul(str, NULL, 0);

	printk(KERN_NOTICE PREFIX "Shall use APIC/MADT table %d\n",
	       acpi_apic_instance);

	return 0;
}

early_param("acpi_apic_instance", acpi_parse_apic_instance);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* acpi_tables.c - ACPI Boot-Time Table Parsing
	3	*
	4	* Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	5	*
	6	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	23	*
	24	*/
	25
1da177e4 LT	26	#include <linux/init.h>
1da177e4 LT	27	#include <linux/kernel.h>
1da177e4 LT	28	#include <linux/smp.h>
	29	#include <linux/string.h>
	30	#include <linux/types.h>
	31	#include <linux/irq.h>
	32	#include <linux/errno.h>
	33	#include <linux/acpi.h>
	34	#include <linux/bootmem.h>
	35
	36	#define PREFIX "ACPI: "
	37
04348e69	38	#define ACPI_MAX_TABLES 128
1da177e4	39
1da177e4 LT	40	static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
	41	static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
	42
ad71860a	43	static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
1da177e4	44
4e381a4f	45	static int acpi_apic_instance __initdata;
a1fdcc0d LB	46
a1fdcc0d LB	47	void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
1da177e4 LT	48	{
	49	if (!header)
	50	return;
	51
	52	switch (header->type) {
	53
5f3b1a8b	54	case ACPI_MADT_TYPE_LOCAL_APIC:
4be44fcd	55	{
5f3b1a8b AS	56	struct acpi_madt_local_apic *p =
5f3b1a8b AS	57	(struct acpi_madt_local_apic *)header;
4be44fcd LB	58	printk(KERN_INFO PREFIX
4be44fcd LB	59	"LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
5f3b1a8b AS	60	p->processor_id, p->id,
5f3b1a8b AS	61	(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
4be44fcd	62	}
1da177e4 LT	63	break;
1da177e4 LT	64
5f3b1a8b	65	case ACPI_MADT_TYPE_IO_APIC:
4be44fcd	66	{
5f3b1a8b AS	67	struct acpi_madt_io_apic *p =
5f3b1a8b AS	68	(struct acpi_madt_io_apic *)header;
4be44fcd LB	69	printk(KERN_INFO PREFIX
	70	"IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
	71	p->id, p->address, p->global_irq_base);
	72	}
1da177e4 LT	73	break;
1da177e4 LT	74
5f3b1a8b	75	case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
4be44fcd	76	{
5f3b1a8b AS	77	struct acpi_madt_interrupt_override *p =
5f3b1a8b AS	78	(struct acpi_madt_interrupt_override *)header;
4be44fcd LB	79	printk(KERN_INFO PREFIX
4be44fcd LB	80	"INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
5f3b1a8b AS	81	p->bus, p->source_irq, p->global_irq,
	82	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
	83	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
	84	if (p->inti_flags &
	85	~(ACPI_MADT_POLARITY_MASK \| ACPI_MADT_TRIGGER_MASK))
4be44fcd LB	86	printk(KERN_INFO PREFIX
4be44fcd LB	87	"INT_SRC_OVR unexpected reserved flags: 0x%x\n",
5f3b1a8b AS	88	p->inti_flags &
5f3b1a8b AS	89	~(ACPI_MADT_POLARITY_MASK \| ACPI_MADT_TRIGGER_MASK));
1da177e4	90
4be44fcd	91	}
1da177e4 LT	92	break;
1da177e4 LT	93
5f3b1a8b	94	case ACPI_MADT_TYPE_NMI_SOURCE:
4be44fcd	95	{
5f3b1a8b AS	96	struct acpi_madt_nmi_source *p =
5f3b1a8b AS	97	(struct acpi_madt_nmi_source *)header;
4be44fcd LB	98	printk(KERN_INFO PREFIX
4be44fcd LB	99	"NMI_SRC (%s %s global_irq %d)\n",
5f3b1a8b AS	100	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
5f3b1a8b AS	101	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
4be44fcd LB	102	p->global_irq);
4be44fcd LB	103	}
1da177e4 LT	104	break;
1da177e4 LT	105
5f3b1a8b	106	case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
4be44fcd	107	{
5f3b1a8b AS	108	struct acpi_madt_local_apic_nmi *p =
5f3b1a8b AS	109	(struct acpi_madt_local_apic_nmi *)header;
4be44fcd LB	110	printk(KERN_INFO PREFIX
4be44fcd LB	111	"LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
5f3b1a8b AS	112	p->processor_id,
	113	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
	114	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
4be44fcd LB	115	p->lint);
4be44fcd LB	116	}
1da177e4 LT	117	break;
1da177e4 LT	118
5f3b1a8b	119	case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
4be44fcd	120	{
5f3b1a8b AS	121	struct acpi_madt_local_apic_override *p =
5f3b1a8b AS	122	(struct acpi_madt_local_apic_override *)header;
4be44fcd LB	123	printk(KERN_INFO PREFIX
	124	"LAPIC_ADDR_OVR (address[%p])\n",
	125	(void *)(unsigned long)p->address);
	126	}
1da177e4 LT	127	break;
1da177e4 LT	128
5f3b1a8b	129	case ACPI_MADT_TYPE_IO_SAPIC:
4be44fcd	130	{
5f3b1a8b AS	131	struct acpi_madt_io_sapic *p =
5f3b1a8b AS	132	(struct acpi_madt_io_sapic *)header;
4be44fcd LB	133	printk(KERN_INFO PREFIX
	134	"IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
	135	p->id, (void *)(unsigned long)p->address,
	136	p->global_irq_base);
	137	}
1da177e4 LT	138	break;
1da177e4 LT	139
5f3b1a8b	140	case ACPI_MADT_TYPE_LOCAL_SAPIC:
4be44fcd	141	{
5f3b1a8b AS	142	struct acpi_madt_local_sapic *p =
5f3b1a8b AS	143	(struct acpi_madt_local_sapic *)header;
4be44fcd LB	144	printk(KERN_INFO PREFIX
4be44fcd LB	145	"LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
5f3b1a8b AS	146	p->processor_id, p->id, p->eid,
5f3b1a8b AS	147	(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
4be44fcd	148	}
1da177e4 LT	149	break;
1da177e4 LT	150
5f3b1a8b	151	case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
4be44fcd	152	{
5f3b1a8b AS	153	struct acpi_madt_interrupt_source *p =
5f3b1a8b AS	154	(struct acpi_madt_interrupt_source *)header;
4be44fcd LB	155	printk(KERN_INFO PREFIX
4be44fcd LB	156	"PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
5f3b1a8b AS	157	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
	158	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
	159	p->type, p->id, p->eid, p->io_sapic_vector,
4be44fcd LB	160	p->global_irq);
4be44fcd LB	161	}
1da177e4 LT	162	break;
	163
	164	default:
4be44fcd LB	165	printk(KERN_WARNING PREFIX
	166	"Found unsupported MADT entry (type = 0x%x)\n",
	167	header->type);
1da177e4 LT	168	break;
	169	}
	170	}
	171
1da177e4 LT	172
1da177e4 LT	173	int __init
6eb87fed LB	174	acpi_table_parse_entries(char *id,
6eb87fed LB	175	unsigned long table_size,
4be44fcd	176	int entry_id,
5a8765a8	177	acpi_table_entry_handler handler,
4be44fcd	178	unsigned int max_entries)
1da177e4	179	{
6eb87fed	180	struct acpi_table_header *table_header = NULL;
5f3b1a8b	181	struct acpi_subtable_header *entry;
4be44fcd	182	unsigned int count = 0;
6eb87fed	183	unsigned long table_end;
1da177e4 LT	184
	185	if (!handler)
	186	return -EINVAL;
	187
a1fdcc0d LB	188	if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
	189	acpi_get_table(id, acpi_apic_instance, &table_header);
	190	else
	191	acpi_get_table(id, 0, &table_header);
1da177e4	192
6eb87fed	193	if (!table_header) {
ceb6c468	194	printk(KERN_WARNING PREFIX "%4.4s not present\n", id);
1da177e4 LT	195	return -ENODEV;
	196	}
	197
6eb87fed	198	table_end = (unsigned long)table_header + table_header->length;
1da177e4 LT	199
	200	/* Parse all entries looking for a match. */
	201
5f3b1a8b	202	entry = (struct acpi_subtable_header *)
6eb87fed	203	((unsigned long)table_header + table_size);
1da177e4	204
5f3b1a8b	205	while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
6eb87fed	206	table_end) {
4be44fcd LB	207	if (entry->type == entry_id
4be44fcd LB	208	&& (!max_entries \|\| count++ < max_entries))
6eb87fed	209	if (handler(entry, table_end))
1da177e4 LT	210	return -EINVAL;
1da177e4 LT	211
5f3b1a8b	212	entry = (struct acpi_subtable_header *)
4be44fcd	213	((unsigned long)entry + entry->length);
1da177e4 LT	214	}
1da177e4 LT	215	if (max_entries && count > max_entries) {
ceb6c468 AS	216	printk(KERN_WARNING PREFIX "[%4.4s:0x%02x] ignored %i entries of "
ceb6c468 AS	217	"%i found\n", id, entry_id, count - max_entries, count);
1da177e4 LT	218	}
	219
	220	return count;
	221	}
	222
1da177e4	223	int __init
5f3b1a8b	224	acpi_table_parse_madt(enum acpi_madt_type id,
5a8765a8	225	acpi_table_entry_handler handler, unsigned int max_entries)
1da177e4	226	{
6eb87fed	227	return acpi_table_parse_entries(ACPI_SIG_MADT,
4be44fcd LB	228	sizeof(struct acpi_table_madt), id,
4be44fcd LB	229	handler, max_entries);
1da177e4 LT	230	}
1da177e4 LT	231
7f8f97c3 LB	232	/**
	233	* acpi_table_parse - find table with @id, run @handler on it
	234	*
	235	* @id: table id to find
	236	* @handler: handler to run
	237	*
	238	* Scan the ACPI System Descriptor Table (STD) for a table matching @id,
	239	* run @handler on it. Return 0 if table found, return on if not.
	240	*/
ceb6c468	241	int __init acpi_table_parse(char *id, acpi_table_handler handler)
1da177e4	242	{
ceb6c468	243	struct acpi_table_header *table = NULL;
a1fdcc0d	244
1da177e4 LT	245	if (!handler)
	246	return -EINVAL;
	247
a1fdcc0d LB	248	if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
	249	acpi_get_table(id, acpi_apic_instance, &table);
	250	else
	251	acpi_get_table(id, 0, &table);
	252
ceb6c468 AS	253	if (table) {
ceb6c468 AS	254	handler(table);
ceb6c468	255	return 0;
7f8f97c3 LB	256	} else
7f8f97c3 LB	257	return 1;
1da177e4 LT	258	}
1da177e4 LT	259
a1fdcc0d LB	260	/*
	261	* The BIOS is supposed to supply a single APIC/MADT,
	262	* but some report two. Provide a knob to use either.
	263	* (don't you wish instance 0 and 1 were not the same?)
	264	*/
	265	static void __init check_multiple_madt(void)
	266	{
	267	struct acpi_table_header *table = NULL;
	268
	269	acpi_get_table(ACPI_SIG_MADT, 2, &table);
	270	if (table) {
	271	printk(KERN_WARNING PREFIX
	272	"BIOS bug: multiple APIC/MADT found,"
	273	" using %d\n", acpi_apic_instance);
	274	printk(KERN_WARNING PREFIX
	275	"If \"acpi_apic_instance=%d\" works better, "
	276	"notify linux-acpi@vger.kernel.org\n",
	277	acpi_apic_instance ? 0 : 2);
	278
	279	} else
	280	acpi_apic_instance = 0;
	281
	282	return;
	283	}
	284
1da177e4 LT	285	/*
	286	* acpi_table_init()
	287	*
	288	* find RSDP, find and checksum SDT/XSDT.
	289	* checksum all tables, print SDT/XSDT
5f3b1a8b	290	*
1da177e4 LT	291	* result: sdt_entry[] is initialized
	292	*/
	293
4be44fcd	294	int __init acpi_table_init(void)
1da177e4	295	{
ad71860a	296	acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
a1fdcc0d LB	297	check_multiple_madt();
	298	return 0;
	299	}
	300
	301	static int __init acpi_parse_apic_instance(char *str)
	302	{
	303
	304	acpi_apic_instance = simple_strtoul(str, NULL, 0);
	305
	306	printk(KERN_NOTICE PREFIX "Shall use APIC/MADT table %d\n",
	307	acpi_apic_instance);
	308
1da177e4 LT	309	return 0;
1da177e4 LT	310	}
a1fdcc0d LB	311
a1fdcc0d LB	312	early_param("acpi_apic_instance", acpi_parse_apic_instance);