[net-next-2.6.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_LOCAL_X2APIC:
		{
			struct acpi_madt_local_x2apic *p =
			    (struct acpi_madt_local_x2apic *)header;
			printk(KERN_INFO PREFIX
			       "X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
			       p->local_apic_id, p->uid,
			       (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_X2APIC_NMI:
		{
			u16 polarity, trigger;
			struct acpi_madt_local_x2apic_nmi *p =
			    (struct acpi_madt_local_x2apic_nmi *)header;

			polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
			trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;

			printk(KERN_INFO PREFIX
			       "X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
			       p->uid,
			       mps_inti_flags_polarity[polarity],
			       mps_inti_flags_trigger[trigger],
			       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;
	acpi_size tbl_size;

	if (acpi_disabled)
		return -ENODEV;

	if (!handler)
		return -EINVAL;

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

	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)) {
				early_acpi_os_unmap_memory((char *)table_header, tbl_size);
				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);
	}

	early_acpi_os_unmap_memory((char *)table_header, tbl_size);
	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;
	acpi_size tbl_size;

	if (acpi_disabled)
		return -ENODEV;

	if (!handler)
		return -EINVAL;

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

	if (table) {
		handler(table);
		early_acpi_os_unmap_memory(table, tbl_size);
		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_size tbl_size;

	acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size);
	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);
		early_acpi_os_unmap_memory(table, tbl_size);

	} 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_status status;

	status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
	if (ACPI_FAILURE(status))
		return 1;

	check_multiple_madt();
	return 0;
}

static int __init acpi_parse_apic_instance(char *str)
{
	if (!str)
		return -EINVAL;

	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
7237d3de SS	65	case ACPI_MADT_TYPE_LOCAL_X2APIC:
	66	{
	67	struct acpi_madt_local_x2apic *p =
	68	(struct acpi_madt_local_x2apic *)header;
	69	printk(KERN_INFO PREFIX
	70	"X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
	71	p->local_apic_id, p->uid,
	72	(p->lapic_flags & ACPI_MADT_ENABLED) ?
	73	"enabled" : "disabled");
	74	}
	75	break;
	76
5f3b1a8b	77	case ACPI_MADT_TYPE_IO_APIC:
4be44fcd	78	{
5f3b1a8b AS	79	struct acpi_madt_io_apic *p =
5f3b1a8b AS	80	(struct acpi_madt_io_apic *)header;
4be44fcd LB	81	printk(KERN_INFO PREFIX
	82	"IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
	83	p->id, p->address, p->global_irq_base);
	84	}
1da177e4 LT	85	break;
1da177e4 LT	86
5f3b1a8b	87	case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
4be44fcd	88	{
5f3b1a8b AS	89	struct acpi_madt_interrupt_override *p =
5f3b1a8b AS	90	(struct acpi_madt_interrupt_override *)header;
4be44fcd LB	91	printk(KERN_INFO PREFIX
4be44fcd LB	92	"INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
5f3b1a8b AS	93	p->bus, p->source_irq, p->global_irq,
	94	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
	95	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
	96	if (p->inti_flags &
	97	~(ACPI_MADT_POLARITY_MASK \| ACPI_MADT_TRIGGER_MASK))
4be44fcd LB	98	printk(KERN_INFO PREFIX
4be44fcd LB	99	"INT_SRC_OVR unexpected reserved flags: 0x%x\n",
5f3b1a8b AS	100	p->inti_flags &
5f3b1a8b AS	101	~(ACPI_MADT_POLARITY_MASK \| ACPI_MADT_TRIGGER_MASK));
1da177e4	102
4be44fcd	103	}
1da177e4 LT	104	break;
1da177e4 LT	105
5f3b1a8b	106	case ACPI_MADT_TYPE_NMI_SOURCE:
4be44fcd	107	{
5f3b1a8b AS	108	struct acpi_madt_nmi_source *p =
5f3b1a8b AS	109	(struct acpi_madt_nmi_source *)header;
4be44fcd LB	110	printk(KERN_INFO PREFIX
4be44fcd LB	111	"NMI_SRC (%s %s global_irq %d)\n",
5f3b1a8b AS	112	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
5f3b1a8b AS	113	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
4be44fcd LB	114	p->global_irq);
4be44fcd LB	115	}
1da177e4 LT	116	break;
1da177e4 LT	117
5f3b1a8b	118	case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
4be44fcd	119	{
5f3b1a8b AS	120	struct acpi_madt_local_apic_nmi *p =
5f3b1a8b AS	121	(struct acpi_madt_local_apic_nmi *)header;
4be44fcd LB	122	printk(KERN_INFO PREFIX
4be44fcd LB	123	"LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
5f3b1a8b AS	124	p->processor_id,
	125	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
	126	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
4be44fcd	127	p->lint);
7237d3de SS	128	}
	129	break;
	130
	131	case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
	132	{
	133	u16 polarity, trigger;
	134	struct acpi_madt_local_x2apic_nmi *p =
	135	(struct acpi_madt_local_x2apic_nmi *)header;
	136
	137	polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
	138	trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
	139
	140	printk(KERN_INFO PREFIX
	141	"X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
	142	p->uid,
	143	mps_inti_flags_polarity[polarity],
	144	mps_inti_flags_trigger[trigger],
	145	p->lint);
4be44fcd	146	}
1da177e4 LT	147	break;
1da177e4 LT	148
5f3b1a8b	149	case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
4be44fcd	150	{
5f3b1a8b AS	151	struct acpi_madt_local_apic_override *p =
5f3b1a8b AS	152	(struct acpi_madt_local_apic_override *)header;
4be44fcd LB	153	printk(KERN_INFO PREFIX
	154	"LAPIC_ADDR_OVR (address[%p])\n",
	155	(void *)(unsigned long)p->address);
	156	}
1da177e4 LT	157	break;
1da177e4 LT	158
5f3b1a8b	159	case ACPI_MADT_TYPE_IO_SAPIC:
4be44fcd	160	{
5f3b1a8b AS	161	struct acpi_madt_io_sapic *p =
5f3b1a8b AS	162	(struct acpi_madt_io_sapic *)header;
4be44fcd LB	163	printk(KERN_INFO PREFIX
	164	"IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
	165	p->id, (void *)(unsigned long)p->address,
	166	p->global_irq_base);
	167	}
1da177e4 LT	168	break;
1da177e4 LT	169
5f3b1a8b	170	case ACPI_MADT_TYPE_LOCAL_SAPIC:
4be44fcd	171	{
5f3b1a8b AS	172	struct acpi_madt_local_sapic *p =
5f3b1a8b AS	173	(struct acpi_madt_local_sapic *)header;
4be44fcd LB	174	printk(KERN_INFO PREFIX
4be44fcd LB	175	"LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
5f3b1a8b AS	176	p->processor_id, p->id, p->eid,
5f3b1a8b AS	177	(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
4be44fcd	178	}
1da177e4 LT	179	break;
1da177e4 LT	180
5f3b1a8b	181	case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
4be44fcd	182	{
5f3b1a8b AS	183	struct acpi_madt_interrupt_source *p =
5f3b1a8b AS	184	(struct acpi_madt_interrupt_source *)header;
4be44fcd LB	185	printk(KERN_INFO PREFIX
4be44fcd LB	186	"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	187	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
	188	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
	189	p->type, p->id, p->eid, p->io_sapic_vector,
4be44fcd LB	190	p->global_irq);
4be44fcd LB	191	}
1da177e4 LT	192	break;
	193
	194	default:
4be44fcd LB	195	printk(KERN_WARNING PREFIX
	196	"Found unsupported MADT entry (type = 0x%x)\n",
	197	header->type);
1da177e4 LT	198	break;
	199	}
	200	}
	201
1da177e4 LT	202
1da177e4 LT	203	int __init
6eb87fed LB	204	acpi_table_parse_entries(char *id,
6eb87fed LB	205	unsigned long table_size,
4be44fcd	206	int entry_id,
5a8765a8	207	acpi_table_entry_handler handler,
4be44fcd	208	unsigned int max_entries)
1da177e4	209	{
6eb87fed	210	struct acpi_table_header *table_header = NULL;
5f3b1a8b	211	struct acpi_subtable_header *entry;
4be44fcd	212	unsigned int count = 0;
6eb87fed	213	unsigned long table_end;
7d97277b	214	acpi_size tbl_size;
1da177e4	215
68ca4069	216	if (acpi_disabled)
e5b8fc6a LB	217	return -ENODEV;
e5b8fc6a LB	218
1da177e4 LT	219	if (!handler)
	220	return -EINVAL;
	221
a1fdcc0d	222	if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
7d97277b	223	acpi_get_table_with_size(id, acpi_apic_instance, &table_header, &tbl_size);
a1fdcc0d	224	else
7d97277b	225	acpi_get_table_with_size(id, 0, &table_header, &tbl_size);
1da177e4	226
6eb87fed	227	if (!table_header) {
ceb6c468	228	printk(KERN_WARNING PREFIX "%4.4s not present\n", id);
1da177e4 LT	229	return -ENODEV;
	230	}
	231
6eb87fed	232	table_end = (unsigned long)table_header + table_header->length;
1da177e4 LT	233
	234	/* Parse all entries looking for a match. */
	235
5f3b1a8b	236	entry = (struct acpi_subtable_header *)
6eb87fed	237	((unsigned long)table_header + table_size);
1da177e4	238
5f3b1a8b	239	while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
6eb87fed	240	table_end) {
4be44fcd LB	241	if (entry->type == entry_id
4be44fcd LB	242	&& (!max_entries \|\| count++ < max_entries))
7d97277b YL	243	if (handler(entry, table_end)) {
7d97277b YL	244	early_acpi_os_unmap_memory((char *)table_header, tbl_size);
1da177e4	245	return -EINVAL;
7d97277b	246	}
1da177e4	247
5f3b1a8b	248	entry = (struct acpi_subtable_header *)
4be44fcd	249	((unsigned long)entry + entry->length);
1da177e4 LT	250	}
1da177e4 LT	251	if (max_entries && count > max_entries) {
ceb6c468 AS	252	printk(KERN_WARNING PREFIX "[%4.4s:0x%02x] ignored %i entries of "
ceb6c468 AS	253	"%i found\n", id, entry_id, count - max_entries, count);
1da177e4 LT	254	}
1da177e4 LT	255
7d97277b	256	early_acpi_os_unmap_memory((char *)table_header, tbl_size);
1da177e4 LT	257	return count;
	258	}
	259
1da177e4	260	int __init
5f3b1a8b	261	acpi_table_parse_madt(enum acpi_madt_type id,
5a8765a8	262	acpi_table_entry_handler handler, unsigned int max_entries)
1da177e4	263	{
6eb87fed	264	return acpi_table_parse_entries(ACPI_SIG_MADT,
4be44fcd LB	265	sizeof(struct acpi_table_madt), id,
4be44fcd LB	266	handler, max_entries);
1da177e4 LT	267	}
1da177e4 LT	268
7f8f97c3 LB	269	/**
	270	* acpi_table_parse - find table with @id, run @handler on it
	271	*
	272	* @id: table id to find
	273	* @handler: handler to run
	274	*
	275	* Scan the ACPI System Descriptor Table (STD) for a table matching @id,
	276	* run @handler on it. Return 0 if table found, return on if not.
	277	*/
ceb6c468	278	int __init acpi_table_parse(char *id, acpi_table_handler handler)
1da177e4	279	{
ceb6c468	280	struct acpi_table_header *table = NULL;
7d97277b	281	acpi_size tbl_size;
a1fdcc0d	282
68ca4069	283	if (acpi_disabled)
e5b8fc6a LB	284	return -ENODEV;
e5b8fc6a LB	285
1da177e4 LT	286	if (!handler)
	287	return -EINVAL;
	288
a1fdcc0d	289	if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
7d97277b	290	acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size);
a1fdcc0d	291	else
7d97277b	292	acpi_get_table_with_size(id, 0, &table, &tbl_size);
a1fdcc0d	293
ceb6c468 AS	294	if (table) {
ceb6c468 AS	295	handler(table);
7d97277b	296	early_acpi_os_unmap_memory(table, tbl_size);
ceb6c468	297	return 0;
7f8f97c3 LB	298	} else
7f8f97c3 LB	299	return 1;
1da177e4 LT	300	}
1da177e4 LT	301
a1fdcc0d LB	302	/*
	303	* The BIOS is supposed to supply a single APIC/MADT,
	304	* but some report two. Provide a knob to use either.
	305	* (don't you wish instance 0 and 1 were not the same?)
	306	*/
	307	static void __init check_multiple_madt(void)
	308	{
	309	struct acpi_table_header *table = NULL;
7d97277b	310	acpi_size tbl_size;
a1fdcc0d	311
7d97277b	312	acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size);
a1fdcc0d LB	313	if (table) {
	314	printk(KERN_WARNING PREFIX
	315	"BIOS bug: multiple APIC/MADT found,"
	316	" using %d\n", acpi_apic_instance);
	317	printk(KERN_WARNING PREFIX
	318	"If \"acpi_apic_instance=%d\" works better, "
	319	"notify linux-acpi@vger.kernel.org\n",
	320	acpi_apic_instance ? 0 : 2);
7d97277b	321	early_acpi_os_unmap_memory(table, tbl_size);
a1fdcc0d LB	322
	323	} else
	324	acpi_apic_instance = 0;
	325
	326	return;
	327	}
	328
1da177e4 LT	329	/*
	330	* acpi_table_init()
	331	*
	332	* find RSDP, find and checksum SDT/XSDT.
	333	* checksum all tables, print SDT/XSDT
5f3b1a8b	334	*
1da177e4 LT	335	* result: sdt_entry[] is initialized
	336	*/
	337
4be44fcd	338	int __init acpi_table_init(void)
1da177e4	339	{
9e3a9d1e LB	340	acpi_status status;
	341
	342	status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
	343	if (ACPI_FAILURE(status))
	344	return 1;
	345
a1fdcc0d LB	346	check_multiple_madt();
	347	return 0;
	348	}
	349
	350	static int __init acpi_parse_apic_instance(char *str)
	351	{
f0df2d6b CG	352	if (!str)
f0df2d6b CG	353	return -EINVAL;
a1fdcc0d LB	354
	355	acpi_apic_instance = simple_strtoul(str, NULL, 0);
	356
	357	printk(KERN_NOTICE PREFIX "Shall use APIC/MADT table %d\n",
	358	acpi_apic_instance);
	359
1da177e4 LT	360	return 0;
1da177e4 LT	361	}
a1fdcc0d LB	362
a1fdcc0d LB	363	early_param("acpi_apic_instance", acpi_parse_apic_instance);