[linux-2.6-block.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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 */

/* Uncomment next line to get verbose printout */
/* #define DEBUG */
#define pr_fmt(fmt) "ACPI: " fmt

#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 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;

/*
 * Disable table checksum verification for the early stage due to the size
 * limitation of the current x86 early mapping implementation.
 */
static bool acpi_verify_table_checksum __initdata = false;

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;
			pr_debug("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;
			pr_debug("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;
			pr_debug("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;
			pr_info("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))
				pr_info("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;
			pr_info("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;
			pr_info("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;

			pr_info("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;
			pr_info("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;
			pr_debug("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;
			pr_debug("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;
			pr_info("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;

	case ACPI_MADT_TYPE_GENERIC_INTERRUPT:
		{
			struct acpi_madt_generic_interrupt *p =
				(struct acpi_madt_generic_interrupt *)header;
			pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n",
				 p->uid, p->base_address,
				 p->arm_mpidr,
				 (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");

		}
		break;

	case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR:
		{
			struct acpi_madt_generic_distributor *p =
				(struct acpi_madt_generic_distributor *)header;
			pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n",
				 p->gic_id, p->base_address,
				 p->global_irq_base);
		}
		break;

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

/**
 * acpi_parse_entries_array - for each proc_num find a suitable subtable
 *
 * @id: table id (for debugging purposes)
 * @table_size: single entry size
 * @table_header: where does the table start?
 * @proc: array of acpi_subtable_proc struct containing entry id
 *        and associated handler with it
 * @proc_num: how big proc is?
 * @max_entries: how many entries can we process?
 *
 * For each proc_num find a subtable with proc->id and run proc->handler
 * on it. Assumption is that there's only single handler for particular
 * entry id.
 *
 * On success returns sum of all matching entries for all proc handlers.
 * Otherwise, -ENODEV or -EINVAL is returned.
 */
static int __init
acpi_parse_entries_array(char *id, unsigned long table_size,
		struct acpi_table_header *table_header,
		struct acpi_subtable_proc *proc, int proc_num,
		unsigned int max_entries)
{
	struct acpi_subtable_header *entry;
	unsigned long table_end;
	int count = 0;
	int i;

	if (acpi_disabled)
		return -ENODEV;

	if (!id)
		return -EINVAL;

	if (!table_size)
		return -EINVAL;

	if (!table_header) {
		pr_warn("%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 (max_entries && count >= max_entries)
			break;

		for (i = 0; i < proc_num; i++) {
			if (entry->type != proc[i].id)
				continue;
			if (!proc->handler || proc[i].handler(entry, table_end))
				return -EINVAL;

			proc->count++;
			break;
		}
		if (i != proc_num)
			count++;

		/*
		 * If entry->length is 0, break from this loop to avoid
		 * infinite loop.
		 */
		if (entry->length == 0) {
			pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id);
			return -EINVAL;
		}

		entry = (struct acpi_subtable_header *)
		    ((unsigned long)entry + entry->length);
	}

	if (max_entries && count > max_entries) {
		pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
			id, proc->id, count - max_entries, count);
	}

	return count;
}

int __init
acpi_parse_entries(char *id,
			unsigned long table_size,
			acpi_tbl_entry_handler handler,
			struct acpi_table_header *table_header,
			int entry_id, unsigned int max_entries)
{
	struct acpi_subtable_proc proc = {
		.id		= entry_id,
		.handler	= handler,
	};

	return acpi_parse_entries_array(id, table_size, table_header,
			&proc, 1, max_entries);
}

int __init
acpi_table_parse_entries_array(char *id,
			 unsigned long table_size,
			 struct acpi_subtable_proc *proc, int proc_num,
			 unsigned int max_entries)
{
	struct acpi_table_header *table_header = NULL;
	acpi_size tbl_size;
	int count;
	u32 instance = 0;

	if (acpi_disabled)
		return -ENODEV;

	if (!id)
		return -EINVAL;

	if (!strncmp(id, ACPI_SIG_MADT, 4))
		instance = acpi_apic_instance;

	acpi_get_table_with_size(id, instance, &table_header, &tbl_size);
	if (!table_header) {
		pr_warn("%4.4s not present\n", id);
		return -ENODEV;
	}

	count = acpi_parse_entries_array(id, table_size, table_header,
			proc, proc_num, max_entries);

	early_acpi_os_unmap_memory((char *)table_header, tbl_size);
	return count;
}

int __init
acpi_table_parse_entries(char *id,
			unsigned long table_size,
			int entry_id,
			acpi_tbl_entry_handler handler,
			unsigned int max_entries)
{
	struct acpi_subtable_proc proc = {
		.id		= entry_id,
		.handler	= handler,
	};

	return acpi_table_parse_entries_array(id, table_size, &proc, 1,
						max_entries);
}

int __init
acpi_table_parse_madt(enum acpi_madt_type id,
		      acpi_tbl_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, -errno if not.
 */
int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
{
	struct acpi_table_header *table = NULL;
	acpi_size tbl_size;

	if (acpi_disabled)
		return -ENODEV;

	if (!id || !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 -ENODEV;
}

/* 
 * 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) {
		pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n",
			acpi_apic_instance);
		pr_warn("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;

	if (acpi_verify_table_checksum) {
		pr_info("Early table checksum verification enabled\n");
		acpi_gbl_verify_table_checksum = TRUE;
	} else {
		pr_info("Early table checksum verification disabled\n");
		acpi_gbl_verify_table_checksum = FALSE;
	}

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

	check_multiple_madt();
	return 0;
}

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

	if (kstrtoint(str, 0, &acpi_apic_instance))
		return -EINVAL;

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

	return 0;
}

early_param("acpi_apic_instance", acpi_parse_apic_instance);

static int __init acpi_force_table_verification_setup(char *s)
{
	acpi_verify_table_checksum = true;

	return 0;
}

early_param("acpi_force_table_verification", acpi_force_table_verification_setup);
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	*
1da177e4 LT	18	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	19	*
	20	*/
	21
07f438df HG	22	/* Uncomment next line to get verbose printout */
07f438df HG	23	/* #define DEBUG */
730bf5eb HG	24	#define pr_fmt(fmt) "ACPI: " fmt
730bf5eb HG	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
04348e69	36	#define ACPI_MAX_TABLES 128
1da177e4	37
1da177e4 LT	38	static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
	39	static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
	40
ad71860a	41	static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
1da177e4	42
4e381a4f	43	static int acpi_apic_instance __initdata;
a1fdcc0d	44
4fc0a7e8 LZ	45	/*
	46	* Disable table checksum verification for the early stage due to the size
	47	* limitation of the current x86 early mapping implementation.
	48	*/
	49	static bool acpi_verify_table_checksum __initdata = false;
	50
a1fdcc0d	51	void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
1da177e4 LT	52	{
	53	if (!header)
	54	return;
	55
	56	switch (header->type) {
	57
5f3b1a8b	58	case ACPI_MADT_TYPE_LOCAL_APIC:
4be44fcd	59	{
5f3b1a8b AS	60	struct acpi_madt_local_apic *p =
5f3b1a8b AS	61	(struct acpi_madt_local_apic *)header;
07f438df HG	62	pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
	63	p->processor_id, p->id,
	64	(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
4be44fcd	65	}
1da177e4 LT	66	break;
1da177e4 LT	67
7237d3de SS	68	case ACPI_MADT_TYPE_LOCAL_X2APIC:
	69	{
	70	struct acpi_madt_local_x2apic *p =
	71	(struct acpi_madt_local_x2apic *)header;
07f438df HG	72	pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
	73	p->local_apic_id, p->uid,
	74	(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
7237d3de SS	75	}
	76	break;
	77
5f3b1a8b	78	case ACPI_MADT_TYPE_IO_APIC:
4be44fcd	79	{
5f3b1a8b AS	80	struct acpi_madt_io_apic *p =
5f3b1a8b AS	81	(struct acpi_madt_io_apic *)header;
07f438df HG	82	pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
07f438df HG	83	p->id, p->address, p->global_irq_base);
4be44fcd	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;
730bf5eb HG	91	pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
	92	p->bus, p->source_irq, p->global_irq,
	93	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
	94	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
5f3b1a8b AS	95	if (p->inti_flags &
5f3b1a8b AS	96	~(ACPI_MADT_POLARITY_MASK \| ACPI_MADT_TRIGGER_MASK))
730bf5eb HG	97	pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n",
730bf5eb HG	98	p->inti_flags &
5f3b1a8b	99	~(ACPI_MADT_POLARITY_MASK \| ACPI_MADT_TRIGGER_MASK));
4be44fcd	100	}
1da177e4 LT	101	break;
1da177e4 LT	102
5f3b1a8b	103	case ACPI_MADT_TYPE_NMI_SOURCE:
4be44fcd	104	{
5f3b1a8b AS	105	struct acpi_madt_nmi_source *p =
5f3b1a8b AS	106	(struct acpi_madt_nmi_source *)header;
730bf5eb HG	107	pr_info("NMI_SRC (%s %s global_irq %d)\n",
	108	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
	109	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
	110	p->global_irq);
4be44fcd	111	}
1da177e4 LT	112	break;
1da177e4 LT	113
5f3b1a8b	114	case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
4be44fcd	115	{
5f3b1a8b AS	116	struct acpi_madt_local_apic_nmi *p =
5f3b1a8b AS	117	(struct acpi_madt_local_apic_nmi *)header;
730bf5eb HG	118	pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
	119	p->processor_id,
	120	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
	121	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
	122	p->lint);
7237d3de SS	123	}
	124	break;
	125
	126	case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
	127	{
	128	u16 polarity, trigger;
	129	struct acpi_madt_local_x2apic_nmi *p =
	130	(struct acpi_madt_local_x2apic_nmi *)header;
	131
	132	polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
	133	trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
	134
730bf5eb HG	135	pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
	136	p->uid,
	137	mps_inti_flags_polarity[polarity],
	138	mps_inti_flags_trigger[trigger],
	139	p->lint);
4be44fcd	140	}
1da177e4 LT	141	break;
1da177e4 LT	142
5f3b1a8b	143	case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
4be44fcd	144	{
5f3b1a8b AS	145	struct acpi_madt_local_apic_override *p =
5f3b1a8b AS	146	(struct acpi_madt_local_apic_override *)header;
730bf5eb HG	147	pr_info("LAPIC_ADDR_OVR (address[%p])\n",
730bf5eb HG	148	(void *)(unsigned long)p->address);
4be44fcd	149	}
1da177e4 LT	150	break;
1da177e4 LT	151
5f3b1a8b	152	case ACPI_MADT_TYPE_IO_SAPIC:
4be44fcd	153	{
5f3b1a8b AS	154	struct acpi_madt_io_sapic *p =
5f3b1a8b AS	155	(struct acpi_madt_io_sapic *)header;
07f438df HG	156	pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
	157	p->id, (void *)(unsigned long)p->address,
	158	p->global_irq_base);
4be44fcd	159	}
1da177e4 LT	160	break;
1da177e4 LT	161
5f3b1a8b	162	case ACPI_MADT_TYPE_LOCAL_SAPIC:
4be44fcd	163	{
5f3b1a8b AS	164	struct acpi_madt_local_sapic *p =
5f3b1a8b AS	165	(struct acpi_madt_local_sapic *)header;
07f438df HG	166	pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
	167	p->processor_id, p->id, p->eid,
	168	(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
4be44fcd	169	}
1da177e4 LT	170	break;
1da177e4 LT	171
5f3b1a8b	172	case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
4be44fcd	173	{
5f3b1a8b AS	174	struct acpi_madt_interrupt_source *p =
5f3b1a8b AS	175	(struct acpi_madt_interrupt_source *)header;
730bf5eb HG	176	pr_info("PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
	177	mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
	178	mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
	179	p->type, p->id, p->eid, p->io_sapic_vector,
	180	p->global_irq);
4be44fcd	181	}
1da177e4 LT	182	break;
1da177e4 LT	183
4c1c8d7a HG	184	case ACPI_MADT_TYPE_GENERIC_INTERRUPT:
	185	{
	186	struct acpi_madt_generic_interrupt *p =
	187	(struct acpi_madt_generic_interrupt *)header;
	188	pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n",
	189	p->uid, p->base_address,
	190	p->arm_mpidr,
	191	(p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
	192
	193	}
	194	break;
	195
	196	case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR:
	197	{
	198	struct acpi_madt_generic_distributor *p =
	199	(struct acpi_madt_generic_distributor *)header;
	200	pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n",
	201	p->gic_id, p->base_address,
	202	p->global_irq_base);
	203	}
	204	break;
	205
1da177e4	206	default:
730bf5eb HG	207	pr_warn("Found unsupported MADT entry (type = 0x%x)\n",
730bf5eb HG	208	header->type);
1da177e4 LT	209	break;
	210	}
	211	}
	212
9b3fedde LA	213	/**
	214	* acpi_parse_entries_array - for each proc_num find a suitable subtable
	215	*
	216	* @id: table id (for debugging purposes)
	217	* @table_size: single entry size
	218	* @table_header: where does the table start?
	219	* @proc: array of acpi_subtable_proc struct containing entry id
	220	* and associated handler with it
	221	* @proc_num: how big proc is?
	222	* @max_entries: how many entries can we process?
	223	*
	224	* For each proc_num find a subtable with proc->id and run proc->handler
	225	* on it. Assumption is that there's only single handler for particular
	226	* entry id.
	227	*
	228	* On success returns sum of all matching entries for all proc handlers.
	229	* Otherwise, -ENODEV or -EINVAL is returned.
	230	*/
	231	static int __init
	232	acpi_parse_entries_array(char *id, unsigned long table_size,
f08bb472	233	struct acpi_table_header *table_header,
9b3fedde LA	234	struct acpi_subtable_proc *proc, int proc_num,
9b3fedde LA	235	unsigned int max_entries)
1da177e4	236	{
5f3b1a8b	237	struct acpi_subtable_header *entry;
6eb87fed	238	unsigned long table_end;
9b3fedde LA	239	int count = 0;
9b3fedde LA	240	int i;
1da177e4	241
68ca4069	242	if (acpi_disabled)
e5b8fc6a LB	243	return -ENODEV;
e5b8fc6a LB	244
9b3fedde	245	if (!id)
1da177e4 LT	246	return -EINVAL;
1da177e4 LT	247
f08bb472 AC	248	if (!table_size)
f08bb472 AC	249	return -EINVAL;
1da177e4	250
6eb87fed	251	if (!table_header) {
730bf5eb	252	pr_warn("%4.4s not present\n", id);
1da177e4 LT	253	return -ENODEV;
	254	}
	255
6eb87fed	256	table_end = (unsigned long)table_header + table_header->length;
1da177e4 LT	257
	258	/* Parse all entries looking for a match. */
	259
5f3b1a8b	260	entry = (struct acpi_subtable_header *)
6eb87fed	261	((unsigned long)table_header + table_size);
1da177e4	262
5f3b1a8b	263	while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
6eb87fed	264	table_end) {
9b3fedde LA	265	if (max_entries && count >= max_entries)
	266	break;
	267
	268	for (i = 0; i < proc_num; i++) {
	269	if (entry->type != proc[i].id)
	270	continue;
	271	if (!proc->handler \|\| proc[i].handler(entry, table_end))
f08bb472	272	return -EINVAL;
369d913b	273
9b3fedde LA	274	proc->count++;
9b3fedde LA	275	break;
4ceacd02	276	}
9b3fedde LA	277	if (i != proc_num)
9b3fedde LA	278	count++;
4ceacd02	279
369d913b FY	280	/*
	281	* If entry->length is 0, break from this loop to avoid
	282	* infinite loop.
	283	*/
	284	if (entry->length == 0) {
9b3fedde	285	pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id);
f08bb472	286	return -EINVAL;
369d913b	287	}
1da177e4	288
5f3b1a8b	289	entry = (struct acpi_subtable_header *)
4be44fcd	290	((unsigned long)entry + entry->length);
1da177e4	291	}
f08bb472	292
1da177e4	293	if (max_entries && count > max_entries) {
730bf5eb	294	pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
9b3fedde	295	id, proc->id, count - max_entries, count);
1da177e4 LT	296	}
	297
	298	return count;
f08bb472 AC	299	}
	300
	301	int __init
9b3fedde LA	302	acpi_parse_entries(char *id,
	303	unsigned long table_size,
	304	acpi_tbl_entry_handler handler,
	305	struct acpi_table_header *table_header,
	306	int entry_id, unsigned int max_entries)
	307	{
	308	struct acpi_subtable_proc proc = {
	309	.id = entry_id,
	310	.handler = handler,
	311	};
	312
	313	return acpi_parse_entries_array(id, table_size, table_header,
	314	&proc, 1, max_entries);
	315	}
	316
	317	int __init
	318	acpi_table_parse_entries_array(char *id,
f08bb472	319	unsigned long table_size,
9b3fedde	320	struct acpi_subtable_proc *proc, int proc_num,
f08bb472 AC	321	unsigned int max_entries)
	322	{
	323	struct acpi_table_header *table_header = NULL;
	324	acpi_size tbl_size;
	325	int count;
	326	u32 instance = 0;
	327
	328	if (acpi_disabled)
	329	return -ENODEV;
	330
9b3fedde	331	if (!id)
f08bb472 AC	332	return -EINVAL;
	333
	334	if (!strncmp(id, ACPI_SIG_MADT, 4))
	335	instance = acpi_apic_instance;
	336
	337	acpi_get_table_with_size(id, instance, &table_header, &tbl_size);
	338	if (!table_header) {
	339	pr_warn("%4.4s not present\n", id);
	340	return -ENODEV;
	341	}
	342
9b3fedde LA	343	count = acpi_parse_entries_array(id, table_size, table_header,
9b3fedde LA	344	proc, proc_num, max_entries);
f08bb472	345
369d913b	346	early_acpi_os_unmap_memory((char *)table_header, tbl_size);
f08bb472	347	return count;
1da177e4 LT	348	}
1da177e4 LT	349
9b3fedde LA	350	int __init
	351	acpi_table_parse_entries(char *id,
	352	unsigned long table_size,
	353	int entry_id,
	354	acpi_tbl_entry_handler handler,
	355	unsigned int max_entries)
	356	{
	357	struct acpi_subtable_proc proc = {
	358	.id = entry_id,
	359	.handler = handler,
	360	};
	361
	362	return acpi_table_parse_entries_array(id, table_size, &proc, 1,
	363	max_entries);
	364	}
	365
1da177e4	366	int __init
5f3b1a8b	367	acpi_table_parse_madt(enum acpi_madt_type id,
b43e1065	368	acpi_tbl_entry_handler handler, unsigned int max_entries)
1da177e4	369	{
6eb87fed	370	return acpi_table_parse_entries(ACPI_SIG_MADT,
4be44fcd LB	371	sizeof(struct acpi_table_madt), id,
4be44fcd LB	372	handler, max_entries);
1da177e4 LT	373	}
1da177e4 LT	374
7f8f97c3 LB	375	/**
7f8f97c3 LB	376	* acpi_table_parse - find table with @id, run @handler on it
7f8f97c3 LB	377	* @id: table id to find
	378	* @handler: handler to run
	379	*
	380	* Scan the ACPI System Descriptor Table (STD) for a table matching @id,
f8a571b2	381	* run @handler on it.
	382	*
	383	* Return 0 if table found, -errno if not.
7f8f97c3	384	*/
b43e1065	385	int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
1da177e4	386	{
ceb6c468	387	struct acpi_table_header *table = NULL;
7d97277b	388	acpi_size tbl_size;
a1fdcc0d	389
68ca4069	390	if (acpi_disabled)
e5b8fc6a LB	391	return -ENODEV;
e5b8fc6a LB	392
de2d1a7e	393	if (!id \|\| !handler)
1da177e4 LT	394	return -EINVAL;
1da177e4 LT	395
a1fdcc0d	396	if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
7d97277b	397	acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size);
a1fdcc0d	398	else
7d97277b	399	acpi_get_table_with_size(id, 0, &table, &tbl_size);
a1fdcc0d	400
ceb6c468 AS	401	if (table) {
ceb6c468 AS	402	handler(table);
7d97277b	403	early_acpi_os_unmap_memory(table, tbl_size);
ceb6c468	404	return 0;
7f8f97c3	405	} else
95df812d	406	return -ENODEV;
1da177e4 LT	407	}
1da177e4 LT	408
a1fdcc0d LB	409	/*
	410	* The BIOS is supposed to supply a single APIC/MADT,
	411	* but some report two. Provide a knob to use either.
	412	* (don't you wish instance 0 and 1 were not the same?)
	413	*/
	414	static void __init check_multiple_madt(void)
	415	{
	416	struct acpi_table_header *table = NULL;
7d97277b	417	acpi_size tbl_size;
a1fdcc0d	418
7d97277b	419	acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size);
a1fdcc0d	420	if (table) {
730bf5eb HG	421	pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n",
	422	acpi_apic_instance);
	423	pr_warn("If \"acpi_apic_instance=%d\" works better, "
	424	"notify linux-acpi@vger.kernel.org\n",
	425	acpi_apic_instance ? 0 : 2);
7d97277b	426	early_acpi_os_unmap_memory(table, tbl_size);
a1fdcc0d LB	427
	428	} else
	429	acpi_apic_instance = 0;
	430
	431	return;
	432	}
	433
1da177e4 LT	434	/*
	435	* acpi_table_init()
	436	*
	437	* find RSDP, find and checksum SDT/XSDT.
	438	* checksum all tables, print SDT/XSDT
5f3b1a8b	439	*
1da177e4 LT	440	* result: sdt_entry[] is initialized
	441	*/
	442
4be44fcd	443	int __init acpi_table_init(void)
1da177e4	444	{
9e3a9d1e LB	445	acpi_status status;
9e3a9d1e LB	446
4fc0a7e8 LZ	447	if (acpi_verify_table_checksum) {
	448	pr_info("Early table checksum verification enabled\n");
	449	acpi_gbl_verify_table_checksum = TRUE;
	450	} else {
	451	pr_info("Early table checksum verification disabled\n");
	452	acpi_gbl_verify_table_checksum = FALSE;
	453	}
	454
9e3a9d1e LB	455	status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
9e3a9d1e LB	456	if (ACPI_FAILURE(status))
95df812d	457	return -EINVAL;
9e3a9d1e	458
a1fdcc0d LB	459	check_multiple_madt();
	460	return 0;
	461	}
	462
	463	static int __init acpi_parse_apic_instance(char *str)
	464	{
f0df2d6b CG	465	if (!str)
f0df2d6b CG	466	return -EINVAL;
a1fdcc0d	467
3d915894 CJ	468	if (kstrtoint(str, 0, &acpi_apic_instance))
3d915894 CJ	469	return -EINVAL;
a1fdcc0d	470
730bf5eb	471	pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance);
a1fdcc0d	472
1da177e4 LT	473	return 0;
1da177e4 LT	474	}
a1fdcc0d LB	475
a1fdcc0d LB	476	early_param("acpi_apic_instance", acpi_parse_apic_instance);
4fc0a7e8 LZ	477
	478	static int __init acpi_force_table_verification_setup(char *s)
	479	{
	480	acpi_verify_table_checksum = true;
	481
	482	return 0;
	483	}
	484
	485	early_param("acpi_force_table_verification", acpi_force_table_verification_setup);