path: root/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c

/******************************************************************************
 *
 * Module Name: oslinuxtbl - Linux OSL for obtaining ACPI tables
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2014, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include "acpidump.h"

#define _COMPONENT          ACPI_OS_SERVICES
ACPI_MODULE_NAME("oslinuxtbl")

#ifndef PATH_MAX
#define PATH_MAX 256
#endif
/* List of information about obtained ACPI tables */
typedef struct osl_table_info {
	struct osl_table_info *next;
	u32 instance;
	char signature[ACPI_NAME_SIZE];

} osl_table_info;

/* Local prototypes */

static acpi_status osl_table_initialize(void);

static acpi_status
osl_table_name_from_file(char *filename, char *signature, u32 *instance);

static acpi_status osl_add_table_to_list(char *signature, u32 instance);

static acpi_status
osl_read_table_from_file(char *filename,
			 acpi_size file_offset,
			 char *signature, struct acpi_table_header **table);

static acpi_status
osl_map_table(acpi_size address,
	      char *signature, struct acpi_table_header **table);

static void osl_unmap_table(struct acpi_table_header *table);

static acpi_physical_address osl_find_rsdp_via_efi(void);

static acpi_status osl_load_rsdp(void);

static acpi_status osl_list_customized_tables(char *directory);

static acpi_status
osl_get_customized_table(char *pathname,
			 char *signature,
			 u32 instance,
			 struct acpi_table_header **table,
			 acpi_physical_address * address);

static acpi_status osl_list_bios_tables(void);

static acpi_status
osl_get_bios_table(char *signature,
		   u32 instance,
		   struct acpi_table_header **table,
		   acpi_physical_address * address);

static acpi_status osl_get_last_status(acpi_status default_status);

/* File locations */

#define DYNAMIC_TABLE_DIR   "/sys/firmware/acpi/tables/dynamic"
#define STATIC_TABLE_DIR    "/sys/firmware/acpi/tables"
#define EFI_SYSTAB          "/sys/firmware/efi/systab"

/* Should we get dynamically loaded SSDTs from DYNAMIC_TABLE_DIR? */

u8 gbl_dump_dynam