[linux.git] / drivers / acpi / tables.c

/*
 *  acpi_tables.c - ACPI Boot-Time Table Parsing
 *
 *  Copyright (C) 2001 Paul Diefenbaugh <[email protected]>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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;
	}
}

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_header *entry;
	int count = 0;
	unsigned long table_end;

	if (acpi_disabled)
		return -ENODEV;

	if (!id || !handler)
		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 (entry->type == entry_id
		    && (!max_entries || count < max_entries)) {
			if (handler(entry, table_end))
				return -EINVAL;

			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, entry_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, entry_id, count - max_entries, count);
	}

	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_table_header *table_header = NULL;
	acpi_size tbl_size;
	int count;
	u32 instance = 0;

	if (acpi_disabled)
		return -ENODEV;

	if (!id || !handler)
		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(id, table_size, handler, table_header,
			entry_id, max_entries);

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

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 [email protected]\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 <[email protected]>
	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
1da177e4	213	int __init
f08bb472 AC	214	acpi_parse_entries(char *id, unsigned long table_size,
	215	acpi_tbl_entry_handler handler,
	216	struct acpi_table_header *table_header,
	217	int entry_id, unsigned int max_entries)
1da177e4	218	{
5f3b1a8b	219	struct acpi_subtable_header *entry;
f08bb472	220	int count = 0;
6eb87fed	221	unsigned long table_end;
1da177e4	222
68ca4069	223	if (acpi_disabled)
e5b8fc6a LB	224	return -ENODEV;
e5b8fc6a LB	225
f08bb472	226	if (!id \|\| !handler)
1da177e4 LT	227	return -EINVAL;
1da177e4 LT	228
f08bb472 AC	229	if (!table_size)
f08bb472 AC	230	return -EINVAL;
1da177e4	231
6eb87fed	232	if (!table_header) {
730bf5eb	233	pr_warn("%4.4s not present\n", id);
1da177e4 LT	234	return -ENODEV;
	235	}
	236
6eb87fed	237	table_end = (unsigned long)table_header + table_header->length;
1da177e4 LT	238
	239	/* Parse all entries looking for a match. */
	240
5f3b1a8b	241	entry = (struct acpi_subtable_header *)
6eb87fed	242	((unsigned long)table_header + table_size);
1da177e4	243
5f3b1a8b	244	while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
6eb87fed	245	table_end) {
4be44fcd	246	if (entry->type == entry_id
4ceacd02	247	&& (!max_entries \|\| count < max_entries)) {
369d913b	248	if (handler(entry, table_end))
f08bb472	249	return -EINVAL;
369d913b	250
4ceacd02 TN	251	count++;
	252	}
	253
369d913b FY	254	/*
	255	* If entry->length is 0, break from this loop to avoid
	256	* infinite loop.
	257	*/
	258	if (entry->length == 0) {
730bf5eb	259	pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, entry_id);
f08bb472	260	return -EINVAL;
369d913b	261	}
1da177e4	262
5f3b1a8b	263	entry = (struct acpi_subtable_header *)
4be44fcd	264	((unsigned long)entry + entry->length);
1da177e4	265	}
f08bb472	266
1da177e4	267	if (max_entries && count > max_entries) {
730bf5eb HG	268	pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
730bf5eb HG	269	id, entry_id, count - max_entries, count);
1da177e4 LT	270	}
	271
	272	return count;
f08bb472 AC	273	}
	274
	275	int __init
	276	acpi_table_parse_entries(char *id,
	277	unsigned long table_size,
	278	int entry_id,
	279	acpi_tbl_entry_handler handler,
	280	unsigned int max_entries)
	281	{
	282	struct acpi_table_header *table_header = NULL;
	283	acpi_size tbl_size;
	284	int count;
	285	u32 instance = 0;
	286
	287	if (acpi_disabled)
	288	return -ENODEV;
	289
	290	if (!id \|\| !handler)
	291	return -EINVAL;
	292
	293	if (!strncmp(id, ACPI_SIG_MADT, 4))
	294	instance = acpi_apic_instance;
	295
	296	acpi_get_table_with_size(id, instance, &table_header, &tbl_size);
	297	if (!table_header) {
	298	pr_warn("%4.4s not present\n", id);
	299	return -ENODEV;
	300	}
	301
	302	count = acpi_parse_entries(id, table_size, handler, table_header,
	303	entry_id, max_entries);
	304
369d913b	305	early_acpi_os_unmap_memory((char *)table_header, tbl_size);
f08bb472	306	return count;
1da177e4 LT	307	}
1da177e4 LT	308
1da177e4	309	int __init
5f3b1a8b	310	acpi_table_parse_madt(enum acpi_madt_type id,
b43e1065	311	acpi_tbl_entry_handler handler, unsigned int max_entries)
1da177e4	312	{
6eb87fed	313	return acpi_table_parse_entries(ACPI_SIG_MADT,
4be44fcd LB	314	sizeof(struct acpi_table_madt), id,
4be44fcd LB	315	handler, max_entries);
1da177e4 LT	316	}
1da177e4 LT	317
7f8f97c3 LB	318	/**
7f8f97c3 LB	319	* acpi_table_parse - find table with @id, run @handler on it
7f8f97c3 LB	320	* @id: table id to find
	321	* @handler: handler to run
	322	*
	323	* Scan the ACPI System Descriptor Table (STD) for a table matching @id,
f8a571b2	324	* run @handler on it.
	325	*
	326	* Return 0 if table found, -errno if not.
7f8f97c3	327	*/
b43e1065	328	int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
1da177e4	329	{
ceb6c468	330	struct acpi_table_header *table = NULL;
7d97277b	331	acpi_size tbl_size;
a1fdcc0d	332
68ca4069	333	if (acpi_disabled)
e5b8fc6a LB	334	return -ENODEV;
e5b8fc6a LB	335
de2d1a7e	336	if (!id \|\| !handler)
1da177e4 LT	337	return -EINVAL;
1da177e4 LT	338
a1fdcc0d	339	if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
7d97277b	340	acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size);
a1fdcc0d	341	else
7d97277b	342	acpi_get_table_with_size(id, 0, &table, &tbl_size);
a1fdcc0d	343
ceb6c468 AS	344	if (table) {
ceb6c468 AS	345	handler(table);
7d97277b	346	early_acpi_os_unmap_memory(table, tbl_size);
ceb6c468	347	return 0;
7f8f97c3	348	} else
95df812d	349	return -ENODEV;
1da177e4 LT	350	}
1da177e4 LT	351
a1fdcc0d LB	352	/*
	353	* The BIOS is supposed to supply a single APIC/MADT,
	354	* but some report two. Provide a knob to use either.
	355	* (don't you wish instance 0 and 1 were not the same?)
	356	*/
	357	static void __init check_multiple_madt(void)
	358	{
	359	struct acpi_table_header *table = NULL;
7d97277b	360	acpi_size tbl_size;
a1fdcc0d	361
7d97277b	362	acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size);
a1fdcc0d	363	if (table) {
730bf5eb HG	364	pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n",
	365	acpi_apic_instance);
	366	pr_warn("If \"acpi_apic_instance=%d\" works better, "
	367	"notify [email protected]\n",
	368	acpi_apic_instance ? 0 : 2);
7d97277b	369	early_acpi_os_unmap_memory(table, tbl_size);
a1fdcc0d LB	370
	371	} else
	372	acpi_apic_instance = 0;
	373
	374	return;
	375	}
	376
1da177e4 LT	377	/*
	378	* acpi_table_init()
	379	*
	380	* find RSDP, find and checksum SDT/XSDT.
	381	* checksum all tables, print SDT/XSDT
5f3b1a8b	382	*
1da177e4 LT	383	* result: sdt_entry[] is initialized
	384	*/
	385
4be44fcd	386	int __init acpi_table_init(void)
1da177e4	387	{
9e3a9d1e LB	388	acpi_status status;
9e3a9d1e LB	389
4fc0a7e8 LZ	390	if (acpi_verify_table_checksum) {
	391	pr_info("Early table checksum verification enabled\n");
	392	acpi_gbl_verify_table_checksum = TRUE;
	393	} else {
	394	pr_info("Early table checksum verification disabled\n");
	395	acpi_gbl_verify_table_checksum = FALSE;
	396	}
	397
9e3a9d1e LB	398	status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
9e3a9d1e LB	399	if (ACPI_FAILURE(status))
95df812d	400	return -EINVAL;
9e3a9d1e	401
a1fdcc0d LB	402	check_multiple_madt();
	403	return 0;
	404	}
	405
	406	static int __init acpi_parse_apic_instance(char *str)
	407	{
f0df2d6b CG	408	if (!str)
f0df2d6b CG	409	return -EINVAL;
a1fdcc0d	410
3d915894 CJ	411	if (kstrtoint(str, 0, &acpi_apic_instance))
3d915894 CJ	412	return -EINVAL;
a1fdcc0d	413
730bf5eb	414	pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance);
a1fdcc0d	415
1da177e4 LT	416	return 0;
1da177e4 LT	417	}
a1fdcc0d LB	418
a1fdcc0d LB	419	early_param("acpi_apic_instance", acpi_parse_apic_instance);
4fc0a7e8 LZ	420
	421	static int __init acpi_force_table_verification_setup(char *s)
	422	{
	423	acpi_verify_table_checksum = true;
	424
	425	return 0;
	426	}
	427
	428	early_param("acpi_force_table_verification", acpi_force_table_verification_setup);