mirror of
https://github.com/edk2-porting/linux-next.git
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800ba7c5ea
ACPICA commit 8b9c69d0984067051ffbe8526f871448ead6a26b Link: https://github.com/acpica/acpica/commit/8b9c69d0 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Erik Kaneda <erik.kaneda@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1373 lines
35 KiB
C
1373 lines
35 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: oslinuxtbl - Linux OSL for obtaining ACPI tables
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*
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* Copyright (C) 2000 - 2020, Intel Corp.
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*
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*****************************************************************************/
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#include "acpidump.h"
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME("oslinuxtbl")
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#ifndef PATH_MAX
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#define PATH_MAX 256
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#endif
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/* List of information about obtained ACPI tables */
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typedef struct osl_table_info {
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struct osl_table_info *next;
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u32 instance;
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char signature[ACPI_NAMESEG_SIZE];
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} osl_table_info;
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/* Local prototypes */
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static acpi_status osl_table_initialize(void);
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static acpi_status
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osl_table_name_from_file(char *filename, char *signature, u32 *instance);
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static acpi_status osl_add_table_to_list(char *signature, u32 instance);
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static acpi_status
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osl_read_table_from_file(char *filename,
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acpi_size file_offset,
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char *signature, struct acpi_table_header **table);
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static acpi_status
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osl_map_table(acpi_size address,
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char *signature, struct acpi_table_header **table);
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static void osl_unmap_table(struct acpi_table_header *table);
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static acpi_physical_address
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osl_find_rsdp_via_efi_by_keyword(FILE * file, const char *keyword);
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static acpi_physical_address osl_find_rsdp_via_efi(void);
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static acpi_status osl_load_rsdp(void);
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static acpi_status osl_list_customized_tables(char *directory);
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static acpi_status
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osl_get_customized_table(char *pathname,
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char *signature,
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u32 instance,
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struct acpi_table_header **table,
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acpi_physical_address *address);
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static acpi_status osl_list_bios_tables(void);
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static acpi_status
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osl_get_bios_table(char *signature,
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u32 instance,
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struct acpi_table_header **table,
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acpi_physical_address *address);
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static acpi_status osl_get_last_status(acpi_status default_status);
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/* File locations */
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#define DYNAMIC_TABLE_DIR "/sys/firmware/acpi/tables/dynamic"
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#define STATIC_TABLE_DIR "/sys/firmware/acpi/tables"
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#define EFI_SYSTAB "/sys/firmware/efi/systab"
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/* Should we get dynamically loaded SSDTs from DYNAMIC_TABLE_DIR? */
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u8 gbl_dump_dynamic_tables = TRUE;
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/* Initialization flags */
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u8 gbl_table_list_initialized = FALSE;
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/* Local copies of main ACPI tables */
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struct acpi_table_rsdp gbl_rsdp;
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struct acpi_table_fadt *gbl_fadt = NULL;
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struct acpi_table_rsdt *gbl_rsdt = NULL;
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struct acpi_table_xsdt *gbl_xsdt = NULL;
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/* Table addresses */
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acpi_physical_address gbl_fadt_address = 0;
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acpi_physical_address gbl_rsdp_address = 0;
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/* Revision of RSD PTR */
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u8 gbl_revision = 0;
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struct osl_table_info *gbl_table_list_head = NULL;
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u32 gbl_table_count = 0;
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/******************************************************************************
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*
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* FUNCTION: osl_get_last_status
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*
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* PARAMETERS: default_status - Default error status to return
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*
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* RETURN: Status; Converted from errno.
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*
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* DESCRIPTION: Get last errno and conver it to acpi_status.
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*
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*****************************************************************************/
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static acpi_status osl_get_last_status(acpi_status default_status)
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{
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switch (errno) {
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case EACCES:
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case EPERM:
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return (AE_ACCESS);
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case ENOENT:
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return (AE_NOT_FOUND);
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case ENOMEM:
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return (AE_NO_MEMORY);
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default:
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return (default_status);
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}
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_os_get_table_by_address
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*
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* PARAMETERS: address - Physical address of the ACPI table
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* table - Where a pointer to the table is returned
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*
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* RETURN: Status; Table buffer is returned if AE_OK.
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* AE_NOT_FOUND: A valid table was not found at the address
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*
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* DESCRIPTION: Get an ACPI table via a physical memory address.
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*
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*****************************************************************************/
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acpi_status
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acpi_os_get_table_by_address(acpi_physical_address address,
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struct acpi_table_header **table)
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{
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u32 table_length;
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struct acpi_table_header *mapped_table;
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struct acpi_table_header *local_table = NULL;
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acpi_status status = AE_OK;
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/* Get main ACPI tables from memory on first invocation of this function */
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status = osl_table_initialize();
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Map the table and validate it */
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status = osl_map_table(address, NULL, &mapped_table);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Copy table to local buffer and return it */
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table_length = ap_get_table_length(mapped_table);
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if (table_length == 0) {
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status = AE_BAD_HEADER;
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goto exit;
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}
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local_table = calloc(1, table_length);
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if (!local_table) {
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status = AE_NO_MEMORY;
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goto exit;
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}
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memcpy(local_table, mapped_table, table_length);
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exit:
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osl_unmap_table(mapped_table);
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*table = local_table;
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_os_get_table_by_name
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*
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* PARAMETERS: signature - ACPI Signature for desired table. Must be
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* a null terminated 4-character string.
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* instance - Multiple table support for SSDT/UEFI (0...n)
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* Must be 0 for other tables.
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* table - Where a pointer to the table is returned
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* address - Where the table physical address is returned
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*
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* RETURN: Status; Table buffer and physical address returned if AE_OK.
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* AE_LIMIT: Instance is beyond valid limit
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* AE_NOT_FOUND: A table with the signature was not found
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*
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* NOTE: Assumes the input signature is uppercase.
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*
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*****************************************************************************/
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acpi_status
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acpi_os_get_table_by_name(char *signature,
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u32 instance,
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struct acpi_table_header **table,
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acpi_physical_address *address)
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{
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acpi_status status;
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/* Get main ACPI tables from memory on first invocation of this function */
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status = osl_table_initialize();
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Not a main ACPI table, attempt to extract it from the RSDT/XSDT */
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if (!gbl_dump_customized_tables) {
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/* Attempt to get the table from the memory */
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status =
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osl_get_bios_table(signature, instance, table, address);
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} else {
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/* Attempt to get the table from the static directory */
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status = osl_get_customized_table(STATIC_TABLE_DIR, signature,
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instance, table, address);
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}
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if (ACPI_FAILURE(status) && status == AE_LIMIT) {
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if (gbl_dump_dynamic_tables) {
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/* Attempt to get a dynamic table */
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status =
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osl_get_customized_table(DYNAMIC_TABLE_DIR,
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signature, instance, table,
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address);
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}
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}
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: osl_add_table_to_list
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*
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* PARAMETERS: signature - Table signature
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* instance - Table instance
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*
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* RETURN: Status; Successfully added if AE_OK.
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* AE_NO_MEMORY: Memory allocation error
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*
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* DESCRIPTION: Insert a table structure into OSL table list.
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*
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*****************************************************************************/
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static acpi_status osl_add_table_to_list(char *signature, u32 instance)
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{
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struct osl_table_info *new_info;
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struct osl_table_info *next;
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u32 next_instance = 0;
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u8 found = FALSE;
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new_info = calloc(1, sizeof(struct osl_table_info));
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if (!new_info) {
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return (AE_NO_MEMORY);
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}
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ACPI_COPY_NAMESEG(new_info->signature, signature);
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if (!gbl_table_list_head) {
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gbl_table_list_head = new_info;
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} else {
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next = gbl_table_list_head;
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while (1) {
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if (ACPI_COMPARE_NAMESEG(next->signature, signature)) {
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if (next->instance == instance) {
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found = TRUE;
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}
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if (next->instance >= next_instance) {
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next_instance = next->instance + 1;
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}
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}
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if (!next->next) {
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break;
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}
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next = next->next;
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}
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next->next = new_info;
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}
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if (found) {
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if (instance) {
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fprintf(stderr,
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"%4.4s: Warning unmatched table instance %d, expected %d\n",
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signature, instance, next_instance);
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}
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instance = next_instance;
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}
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new_info->instance = instance;
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gbl_table_count++;
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_os_get_table_by_index
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*
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* PARAMETERS: index - Which table to get
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* table - Where a pointer to the table is returned
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* instance - Where a pointer to the table instance no. is
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* returned
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* address - Where the table physical address is returned
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*
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* RETURN: Status; Table buffer and physical address returned if AE_OK.
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* AE_LIMIT: Index is beyond valid limit
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*
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* DESCRIPTION: Get an ACPI table via an index value (0 through n). Returns
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* AE_LIMIT when an invalid index is reached. Index is not
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* necessarily an index into the RSDT/XSDT.
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*
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*****************************************************************************/
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acpi_status
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acpi_os_get_table_by_index(u32 index,
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struct acpi_table_header **table,
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u32 *instance, acpi_physical_address *address)
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{
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struct osl_table_info *info;
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acpi_status status;
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u32 i;
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/* Get main ACPI tables from memory on first invocation of this function */
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status = osl_table_initialize();
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Validate Index */
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if (index >= gbl_table_count) {
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return (AE_LIMIT);
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}
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/* Point to the table list entry specified by the Index argument */
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info = gbl_table_list_head;
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for (i = 0; i < index; i++) {
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info = info->next;
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}
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/* Now we can just get the table via the signature */
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status = acpi_os_get_table_by_name(info->signature, info->instance,
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table, address);
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if (ACPI_SUCCESS(status)) {
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*instance = info->instance;
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}
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return (status);
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}
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/******************************************************************************
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*
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* FUNCTION: osl_find_rsdp_via_efi_by_keyword
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*
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* PARAMETERS: keyword - Character string indicating ACPI GUID version
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* in the EFI table
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*
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* RETURN: RSDP address if found
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*
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* DESCRIPTION: Find RSDP address via EFI using keyword indicating the ACPI
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* GUID version.
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*
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*****************************************************************************/
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static acpi_physical_address
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osl_find_rsdp_via_efi_by_keyword(FILE * file, const char *keyword)
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{
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char buffer[80];
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unsigned long long address = 0;
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char format[32];
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snprintf(format, 32, "%s=%s", keyword, "%llx");
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fseek(file, 0, SEEK_SET);
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while (fgets(buffer, 80, file)) {
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if (sscanf(buffer, format, &address) == 1) {
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break;
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}
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}
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return ((acpi_physical_address)(address));
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}
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/******************************************************************************
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*
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* FUNCTION: osl_find_rsdp_via_efi
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*
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* PARAMETERS: None
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*
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* RETURN: RSDP address if found
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*
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* DESCRIPTION: Find RSDP address via EFI.
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*
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*****************************************************************************/
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static acpi_physical_address osl_find_rsdp_via_efi(void)
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{
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FILE *file;
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acpi_physical_address address = 0;
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file = fopen(EFI_SYSTAB, "r");
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if (file) {
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address = osl_find_rsdp_via_efi_by_keyword(file, "ACPI20");
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if (!address) {
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address =
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osl_find_rsdp_via_efi_by_keyword(file, "ACPI");
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}
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fclose(file);
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}
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return (address);
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}
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/******************************************************************************
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*
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* FUNCTION: osl_load_rsdp
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Scan and load RSDP.
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*
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*****************************************************************************/
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static acpi_status osl_load_rsdp(void)
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{
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struct acpi_table_header *mapped_table;
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u8 *rsdp_address;
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acpi_physical_address rsdp_base;
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acpi_size rsdp_size;
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/* Get RSDP from memory */
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rsdp_size = sizeof(struct acpi_table_rsdp);
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if (gbl_rsdp_base) {
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rsdp_base = gbl_rsdp_base;
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} else {
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rsdp_base = osl_find_rsdp_via_efi();
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}
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if (!rsdp_base) {
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rsdp_base = ACPI_HI_RSDP_WINDOW_BASE;
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rsdp_size = ACPI_HI_RSDP_WINDOW_SIZE;
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}
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rsdp_address = acpi_os_map_memory(rsdp_base, rsdp_size);
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if (!rsdp_address) {
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return (osl_get_last_status(AE_BAD_ADDRESS));
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}
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/* Search low memory for the RSDP */
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mapped_table = ACPI_CAST_PTR(struct acpi_table_header,
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acpi_tb_scan_memory_for_rsdp(rsdp_address,
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rsdp_size));
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if (!mapped_table) {
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acpi_os_unmap_memory(rsdp_address, rsdp_size);
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return (AE_NOT_FOUND);
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}
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gbl_rsdp_address =
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rsdp_base + (ACPI_CAST8(mapped_table) - rsdp_address);
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memcpy(&gbl_rsdp, mapped_table, sizeof(struct acpi_table_rsdp));
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acpi_os_unmap_memory(rsdp_address, rsdp_size);
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: osl_can_use_xsdt
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*
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* PARAMETERS: None
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*
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* RETURN: TRUE if XSDT is allowed to be used.
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*
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* DESCRIPTION: This function collects logic that can be used to determine if
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* XSDT should be used instead of RSDT.
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*
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*****************************************************************************/
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static u8 osl_can_use_xsdt(void)
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{
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if (gbl_revision && !acpi_gbl_do_not_use_xsdt) {
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return (TRUE);
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} else {
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return (FALSE);
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}
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}
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/******************************************************************************
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*
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* FUNCTION: osl_table_initialize
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize ACPI table data. Get and store main ACPI tables to
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* local variables. Main ACPI tables include RSDT, FADT, RSDT,
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* and/or XSDT.
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*
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*****************************************************************************/
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static acpi_status osl_table_initialize(void)
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{
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acpi_status status;
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acpi_physical_address address;
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if (gbl_table_list_initialized) {
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return (AE_OK);
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}
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if (!gbl_dump_customized_tables) {
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/* Get RSDP from memory */
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status = osl_load_rsdp();
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Get XSDT from memory */
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|
|
if (gbl_rsdp.revision && !gbl_do_not_dump_xsdt) {
|
|
if (gbl_xsdt) {
|
|
free(gbl_xsdt);
|
|
gbl_xsdt = NULL;
|
|
}
|
|
|
|
gbl_revision = 2;
|
|
status = osl_get_bios_table(ACPI_SIG_XSDT, 0,
|
|
ACPI_CAST_PTR(struct
|
|
acpi_table_header
|
|
*, &gbl_xsdt),
|
|
&address);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
/* Get RSDT from memory */
|
|
|
|
if (gbl_rsdp.rsdt_physical_address) {
|
|
if (gbl_rsdt) {
|
|
free(gbl_rsdt);
|
|
gbl_rsdt = NULL;
|
|
}
|
|
|
|
status = osl_get_bios_table(ACPI_SIG_RSDT, 0,
|
|
ACPI_CAST_PTR(struct
|
|
acpi_table_header
|
|
*, &gbl_rsdt),
|
|
&address);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
/* Get FADT from memory */
|
|
|
|
if (gbl_fadt) {
|
|
free(gbl_fadt);
|
|
gbl_fadt = NULL;
|
|
}
|
|
|
|
status = osl_get_bios_table(ACPI_SIG_FADT, 0,
|
|
ACPI_CAST_PTR(struct
|
|
acpi_table_header *,
|
|
&gbl_fadt),
|
|
&gbl_fadt_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
/* Add mandatory tables to global table list first */
|
|
|
|
status = osl_add_table_to_list(ACPI_RSDP_NAME, 0);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
status = osl_add_table_to_list(ACPI_SIG_RSDT, 0);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
if (gbl_revision == 2) {
|
|
status = osl_add_table_to_list(ACPI_SIG_XSDT, 0);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
status = osl_add_table_to_list(ACPI_SIG_DSDT, 0);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
status = osl_add_table_to_list(ACPI_SIG_FACS, 0);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
/* Add all tables found in the memory */
|
|
|
|
status = osl_list_bios_tables();
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
} else {
|
|
/* Add all tables found in the static directory */
|
|
|
|
status = osl_list_customized_tables(STATIC_TABLE_DIR);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
if (gbl_dump_dynamic_tables) {
|
|
|
|
/* Add all dynamically loaded tables in the dynamic directory */
|
|
|
|
status = osl_list_customized_tables(DYNAMIC_TABLE_DIR);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
gbl_table_list_initialized = TRUE;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: osl_list_bios_tables
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status; Table list is initialized if AE_OK.
|
|
*
|
|
* DESCRIPTION: Add ACPI tables to the table list from memory.
|
|
*
|
|
* NOTE: This works on Linux as table customization does not modify the
|
|
* addresses stored in RSDP/RSDT/XSDT/FADT.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static acpi_status osl_list_bios_tables(void)
|
|
{
|
|
struct acpi_table_header *mapped_table = NULL;
|
|
u8 *table_data;
|
|
u8 number_of_tables;
|
|
u8 item_size;
|
|
acpi_physical_address table_address = 0;
|
|
acpi_status status = AE_OK;
|
|
u32 i;
|
|
|
|
if (osl_can_use_xsdt()) {
|
|
item_size = sizeof(u64);
|
|
table_data =
|
|
ACPI_CAST8(gbl_xsdt) + sizeof(struct acpi_table_header);
|
|
number_of_tables =
|
|
(u8)((gbl_xsdt->header.length -
|
|
sizeof(struct acpi_table_header))
|
|
/ item_size);
|
|
} else { /* Use RSDT if XSDT is not available */
|
|
|
|
item_size = sizeof(u32);
|
|
table_data =
|
|
ACPI_CAST8(gbl_rsdt) + sizeof(struct acpi_table_header);
|
|
number_of_tables =
|
|
(u8)((gbl_rsdt->header.length -
|
|
sizeof(struct acpi_table_header))
|
|
/ item_size);
|
|
}
|
|
|
|
/* Search RSDT/XSDT for the requested table */
|
|
|
|
for (i = 0; i < number_of_tables; ++i, table_data += item_size) {
|
|
if (osl_can_use_xsdt()) {
|
|
table_address =
|
|
(acpi_physical_address)(*ACPI_CAST64(table_data));
|
|
} else {
|
|
table_address =
|
|
(acpi_physical_address)(*ACPI_CAST32(table_data));
|
|
}
|
|
|
|
/* Skip NULL entries in RSDT/XSDT */
|
|
|
|
if (table_address == 0) {
|
|
continue;
|
|
}
|
|
|
|
status = osl_map_table(table_address, NULL, &mapped_table);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
osl_add_table_to_list(mapped_table->signature, 0);
|
|
osl_unmap_table(mapped_table);
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: osl_get_bios_table
|
|
*
|
|
* PARAMETERS: signature - ACPI Signature for common table. Must be
|
|
* a null terminated 4-character string.
|
|
* instance - Multiple table support for SSDT/UEFI (0...n)
|
|
* Must be 0 for other tables.
|
|
* table - Where a pointer to the table is returned
|
|
* address - Where the table physical address is returned
|
|
*
|
|
* RETURN: Status; Table buffer and physical address returned if AE_OK.
|
|
* AE_LIMIT: Instance is beyond valid limit
|
|
* AE_NOT_FOUND: A table with the signature was not found
|
|
*
|
|
* DESCRIPTION: Get a BIOS provided ACPI table
|
|
*
|
|
* NOTE: Assumes the input signature is uppercase.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static acpi_status
|
|
osl_get_bios_table(char *signature,
|
|
u32 instance,
|
|
struct acpi_table_header **table,
|
|
acpi_physical_address *address)
|
|
{
|
|
struct acpi_table_header *local_table = NULL;
|
|
struct acpi_table_header *mapped_table = NULL;
|
|
u8 *table_data;
|
|
u8 number_of_tables;
|
|
u8 item_size;
|
|
u32 current_instance = 0;
|
|
acpi_physical_address table_address;
|
|
acpi_physical_address first_table_address = 0;
|
|
u32 table_length = 0;
|
|
acpi_status status = AE_OK;
|
|
u32 i;
|
|
|
|
/* Handle special tables whose addresses are not in RSDT/XSDT */
|
|
|
|
if (ACPI_COMPARE_NAMESEG(signature, ACPI_RSDP_NAME) ||
|
|
ACPI_COMPARE_NAMESEG(signature, ACPI_SIG_RSDT) ||
|
|
ACPI_COMPARE_NAMESEG(signature, ACPI_SIG_XSDT) ||
|
|
ACPI_COMPARE_NAMESEG(signature, ACPI_SIG_DSDT) ||
|
|
ACPI_COMPARE_NAMESEG(signature, ACPI_SIG_FACS)) {
|
|
|
|
find_next_instance:
|
|
|
|
table_address = 0;
|
|
|
|
/*
|
|
* Get the appropriate address, either 32-bit or 64-bit. Be very
|
|
* careful about the FADT length and validate table addresses.
|
|
* Note: The 64-bit addresses have priority.
|
|
*/
|
|
if (ACPI_COMPARE_NAMESEG(signature, ACPI_SIG_DSDT)) {
|
|
if (current_instance < 2) {
|
|
if ((gbl_fadt->header.length >=
|
|
MIN_FADT_FOR_XDSDT) && gbl_fadt->Xdsdt
|
|
&& current_instance == 0) {
|
|
table_address =
|
|
(acpi_physical_address)gbl_fadt->
|
|
Xdsdt;
|
|
} else
|
|
if ((gbl_fadt->header.length >=
|
|
MIN_FADT_FOR_DSDT)
|
|
&& gbl_fadt->dsdt !=
|
|
first_table_address) {
|
|
table_address =
|
|
(acpi_physical_address)gbl_fadt->
|
|
dsdt;
|
|
}
|
|
}
|
|
} else if (ACPI_COMPARE_NAMESEG(signature, ACPI_SIG_FACS)) {
|
|
if (current_instance < 2) {
|
|
if ((gbl_fadt->header.length >=
|
|
MIN_FADT_FOR_XFACS) && gbl_fadt->Xfacs
|
|
&& current_instance == 0) {
|
|
table_address =
|
|
(acpi_physical_address)gbl_fadt->
|
|
Xfacs;
|
|
} else
|
|
if ((gbl_fadt->header.length >=
|
|
MIN_FADT_FOR_FACS)
|
|
&& gbl_fadt->facs !=
|
|
first_table_address) {
|
|
table_address =
|
|
(acpi_physical_address)gbl_fadt->
|
|
facs;
|
|
}
|
|
}
|
|
} else if (ACPI_COMPARE_NAMESEG(signature, ACPI_SIG_XSDT)) {
|
|
if (!gbl_revision) {
|
|
return (AE_BAD_SIGNATURE);
|
|
}
|
|
if (current_instance == 0) {
|
|
table_address =
|
|
(acpi_physical_address)gbl_rsdp.
|
|
xsdt_physical_address;
|
|
}
|
|
} else if (ACPI_COMPARE_NAMESEG(signature, ACPI_SIG_RSDT)) {
|
|
if (current_instance == 0) {
|
|
table_address =
|
|
(acpi_physical_address)gbl_rsdp.
|
|
rsdt_physical_address;
|
|
}
|
|
} else {
|
|
if (current_instance == 0) {
|
|
table_address =
|
|
(acpi_physical_address)gbl_rsdp_address;
|
|
signature = ACPI_SIG_RSDP;
|
|
}
|
|
}
|
|
|
|
if (table_address == 0) {
|
|
goto exit_find_table;
|
|
}
|
|
|
|
/* Now we can get the requested special table */
|
|
|
|
status = osl_map_table(table_address, signature, &mapped_table);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
table_length = ap_get_table_length(mapped_table);
|
|
if (first_table_address == 0) {
|
|
first_table_address = table_address;
|
|
}
|
|
|
|
/* Match table instance */
|
|
|
|
if (current_instance != instance) {
|
|
osl_unmap_table(mapped_table);
|
|
mapped_table = NULL;
|
|
current_instance++;
|
|
goto find_next_instance;
|
|
}
|
|
} else { /* Case for a normal ACPI table */
|
|
|
|
if (osl_can_use_xsdt()) {
|
|
item_size = sizeof(u64);
|
|
table_data =
|
|
ACPI_CAST8(gbl_xsdt) +
|
|
sizeof(struct acpi_table_header);
|
|
number_of_tables =
|
|
(u8)((gbl_xsdt->header.length -
|
|
sizeof(struct acpi_table_header))
|
|
/ item_size);
|
|
} else { /* Use RSDT if XSDT is not available */
|
|
|
|
item_size = sizeof(u32);
|
|
table_data =
|
|
ACPI_CAST8(gbl_rsdt) +
|
|
sizeof(struct acpi_table_header);
|
|
number_of_tables =
|
|
(u8)((gbl_rsdt->header.length -
|
|
sizeof(struct acpi_table_header))
|
|
/ item_size);
|
|
}
|
|
|
|
/* Search RSDT/XSDT for the requested table */
|
|
|
|
for (i = 0; i < number_of_tables; ++i, table_data += item_size) {
|
|
if (osl_can_use_xsdt()) {
|
|
table_address =
|
|
(acpi_physical_address)(*ACPI_CAST64
|
|
(table_data));
|
|
} else {
|
|
table_address =
|
|
(acpi_physical_address)(*ACPI_CAST32
|
|
(table_data));
|
|
}
|
|
|
|
/* Skip NULL entries in RSDT/XSDT */
|
|
|
|
if (table_address == 0) {
|
|
continue;
|
|
}
|
|
|
|
status =
|
|
osl_map_table(table_address, NULL, &mapped_table);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
table_length = mapped_table->length;
|
|
|
|
/* Does this table match the requested signature? */
|
|
|
|
if (!ACPI_COMPARE_NAMESEG
|
|
(mapped_table->signature, signature)) {
|
|
osl_unmap_table(mapped_table);
|
|
mapped_table = NULL;
|
|
continue;
|
|
}
|
|
|
|
/* Match table instance (for SSDT/UEFI tables) */
|
|
|
|
if (current_instance != instance) {
|
|
osl_unmap_table(mapped_table);
|
|
mapped_table = NULL;
|
|
current_instance++;
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
exit_find_table:
|
|
|
|
if (!mapped_table) {
|
|
return (AE_LIMIT);
|
|
}
|
|
|
|
if (table_length == 0) {
|
|
status = AE_BAD_HEADER;
|
|
goto exit;
|
|
}
|
|
|
|
/* Copy table to local buffer and return it */
|
|
|
|
local_table = calloc(1, table_length);
|
|
if (!local_table) {
|
|
status = AE_NO_MEMORY;
|
|
goto exit;
|
|
}
|
|
|
|
memcpy(local_table, mapped_table, table_length);
|
|
*address = table_address;
|
|
*table = local_table;
|
|
|
|
exit:
|
|
osl_unmap_table(mapped_table);
|
|
return (status);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: osl_list_customized_tables
|
|
*
|
|
* PARAMETERS: directory - Directory that contains the tables
|
|
*
|
|
* RETURN: Status; Table list is initialized if AE_OK.
|
|
*
|
|
* DESCRIPTION: Add ACPI tables to the table list from a directory.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static acpi_status osl_list_customized_tables(char *directory)
|
|
{
|
|
void *table_dir;
|
|
u32 instance;
|
|
char temp_name[ACPI_NAMESEG_SIZE];
|
|
char *filename;
|
|
acpi_status status = AE_OK;
|
|
|
|
/* Open the requested directory */
|
|
|
|
table_dir = acpi_os_open_directory(directory, "*", REQUEST_FILE_ONLY);
|
|
if (!table_dir) {
|
|
return (osl_get_last_status(AE_NOT_FOUND));
|
|
}
|
|
|
|
/* Examine all entries in this directory */
|
|
|
|
while ((filename = acpi_os_get_next_filename(table_dir))) {
|
|
|
|
/* Extract table name and instance number */
|
|
|
|
status =
|
|
osl_table_name_from_file(filename, temp_name, &instance);
|
|
|
|
/* Ignore meaningless files */
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
continue;
|
|
}
|
|
|
|
/* Add new info node to global table list */
|
|
|
|
status = osl_add_table_to_list(temp_name, instance);
|
|
if (ACPI_FAILURE(status)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
acpi_os_close_directory(table_dir);
|
|
return (status);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: osl_map_table
|
|
*
|
|
* PARAMETERS: address - Address of the table in memory
|
|
* signature - Optional ACPI Signature for desired table.
|
|
* Null terminated 4-character string.
|
|
* table - Where a pointer to the mapped table is
|
|
* returned
|
|
*
|
|
* RETURN: Status; Mapped table is returned if AE_OK.
|
|
* AE_NOT_FOUND: A valid table was not found at the address
|
|
*
|
|
* DESCRIPTION: Map entire ACPI table into caller's address space.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static acpi_status
|
|
osl_map_table(acpi_size address,
|
|
char *signature, struct acpi_table_header **table)
|
|
{
|
|
struct acpi_table_header *mapped_table;
|
|
u32 length;
|
|
|
|
if (!address) {
|
|
return (AE_BAD_ADDRESS);
|
|
}
|
|
|
|
/*
|
|
* Map the header so we can get the table length.
|
|
* Use sizeof (struct acpi_table_header) as:
|
|
* 1. it is bigger than 24 to include RSDP->Length
|
|
* 2. it is smaller than sizeof (struct acpi_table_rsdp)
|
|
*/
|
|
mapped_table =
|
|
acpi_os_map_memory(address, sizeof(struct acpi_table_header));
|
|
if (!mapped_table) {
|
|
fprintf(stderr, "Could not map table header at 0x%8.8X%8.8X\n",
|
|
ACPI_FORMAT_UINT64(address));
|
|
return (osl_get_last_status(AE_BAD_ADDRESS));
|
|
}
|
|
|
|
/* If specified, signature must match */
|
|
|
|
if (signature) {
|
|
if (ACPI_VALIDATE_RSDP_SIG(signature)) {
|
|
if (!ACPI_VALIDATE_RSDP_SIG(mapped_table->signature)) {
|
|
acpi_os_unmap_memory(mapped_table,
|
|
sizeof(struct
|
|
acpi_table_header));
|
|
return (AE_BAD_SIGNATURE);
|
|
}
|
|
} else
|
|
if (!ACPI_COMPARE_NAMESEG
|
|
(signature, mapped_table->signature)) {
|
|
acpi_os_unmap_memory(mapped_table,
|
|
sizeof(struct acpi_table_header));
|
|
return (AE_BAD_SIGNATURE);
|
|
}
|
|
}
|
|
|
|
/* Map the entire table */
|
|
|
|
length = ap_get_table_length(mapped_table);
|
|
acpi_os_unmap_memory(mapped_table, sizeof(struct acpi_table_header));
|
|
if (length == 0) {
|
|
return (AE_BAD_HEADER);
|
|
}
|
|
|
|
mapped_table = acpi_os_map_memory(address, length);
|
|
if (!mapped_table) {
|
|
fprintf(stderr,
|
|
"Could not map table at 0x%8.8X%8.8X length %8.8X\n",
|
|
ACPI_FORMAT_UINT64(address), length);
|
|
return (osl_get_last_status(AE_INVALID_TABLE_LENGTH));
|
|
}
|
|
|
|
(void)ap_is_valid_checksum(mapped_table);
|
|
|
|
*table = mapped_table;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: osl_unmap_table
|
|
*
|
|
* PARAMETERS: table - A pointer to the mapped table
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Unmap entire ACPI table.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static void osl_unmap_table(struct acpi_table_header *table)
|
|
{
|
|
if (table) {
|
|
acpi_os_unmap_memory(table, ap_get_table_length(table));
|
|
}
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: osl_table_name_from_file
|
|
*
|
|
* PARAMETERS: filename - File that contains the desired table
|
|
* signature - Pointer to 4-character buffer to store
|
|
* extracted table signature.
|
|
* instance - Pointer to integer to store extracted
|
|
* table instance number.
|
|
*
|
|
* RETURN: Status; Table name is extracted if AE_OK.
|
|
*
|
|
* DESCRIPTION: Extract table signature and instance number from a table file
|
|
* name.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static acpi_status
|
|
osl_table_name_from_file(char *filename, char *signature, u32 *instance)
|
|
{
|
|
|
|
/* Ignore meaningless files */
|
|
|
|
if (strlen(filename) < ACPI_NAMESEG_SIZE) {
|
|
return (AE_BAD_SIGNATURE);
|
|
}
|
|
|
|
/* Extract instance number */
|
|
|
|
if (isdigit((int)filename[ACPI_NAMESEG_SIZE])) {
|
|
sscanf(&filename[ACPI_NAMESEG_SIZE], "%u", instance);
|
|
} else if (strlen(filename) != ACPI_NAMESEG_SIZE) {
|
|
return (AE_BAD_SIGNATURE);
|
|
} else {
|
|
*instance = 0;
|
|
}
|
|
|
|
/* Extract signature */
|
|
|
|
ACPI_COPY_NAMESEG(signature, filename);
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: osl_read_table_from_file
|
|
*
|
|
* PARAMETERS: filename - File that contains the desired table
|
|
* file_offset - Offset of the table in file
|
|
* signature - Optional ACPI Signature for desired table.
|
|
* A null terminated 4-character string.
|
|
* table - Where a pointer to the table is returned
|
|
*
|
|
* RETURN: Status; Table buffer is returned if AE_OK.
|
|
*
|
|
* DESCRIPTION: Read a ACPI table from a file.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static acpi_status
|
|
osl_read_table_from_file(char *filename,
|
|
acpi_size file_offset,
|
|
char *signature, struct acpi_table_header **table)
|
|
{
|
|
FILE *table_file;
|
|
struct acpi_table_header header;
|
|
struct acpi_table_header *local_table = NULL;
|
|
u32 table_length;
|
|
s32 count;
|
|
acpi_status status = AE_OK;
|
|
|
|
/* Open the file */
|
|
|
|
table_file = fopen(filename, "rb");
|
|
if (table_file == NULL) {
|
|
fprintf(stderr, "Could not open table file: %s\n", filename);
|
|
return (osl_get_last_status(AE_NOT_FOUND));
|
|
}
|
|
|
|
fseek(table_file, file_offset, SEEK_SET);
|
|
|
|
/* Read the Table header to get the table length */
|
|
|
|
count = fread(&header, 1, sizeof(struct acpi_table_header), table_file);
|
|
if (count != sizeof(struct acpi_table_header)) {
|
|
fprintf(stderr, "Could not read table header: %s\n", filename);
|
|
status = AE_BAD_HEADER;
|
|
goto exit;
|
|
}
|
|
|
|
/* If signature is specified, it must match the table */
|
|
|
|
if (signature) {
|
|
if (ACPI_VALIDATE_RSDP_SIG(signature)) {
|
|
if (!ACPI_VALIDATE_RSDP_SIG(header.signature)) {
|
|
fprintf(stderr,
|
|
"Incorrect RSDP signature: found %8.8s\n",
|
|
header.signature);
|
|
status = AE_BAD_SIGNATURE;
|
|
goto exit;
|
|
}
|
|
} else if (!ACPI_COMPARE_NAMESEG(signature, header.signature)) {
|
|
fprintf(stderr,
|
|
"Incorrect signature: Expecting %4.4s, found %4.4s\n",
|
|
signature, header.signature);
|
|
status = AE_BAD_SIGNATURE;
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
table_length = ap_get_table_length(&header);
|
|
if (table_length == 0) {
|
|
status = AE_BAD_HEADER;
|
|
goto exit;
|
|
}
|
|
|
|
/* Read the entire table into a local buffer */
|
|
|
|
local_table = calloc(1, table_length);
|
|
if (!local_table) {
|
|
fprintf(stderr,
|
|
"%4.4s: Could not allocate buffer for table of length %X\n",
|
|
header.signature, table_length);
|
|
status = AE_NO_MEMORY;
|
|
goto exit;
|
|
}
|
|
|
|
fseek(table_file, file_offset, SEEK_SET);
|
|
|
|
count = fread(local_table, 1, table_length, table_file);
|
|
if (count != table_length) {
|
|
fprintf(stderr, "%4.4s: Could not read table content\n",
|
|
header.signature);
|
|
status = AE_INVALID_TABLE_LENGTH;
|
|
goto exit;
|
|
}
|
|
|
|
/* Validate checksum */
|
|
|
|
(void)ap_is_valid_checksum(local_table);
|
|
|
|
exit:
|
|
fclose(table_file);
|
|
*table = local_table;
|
|
return (status);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: osl_get_customized_table
|
|
*
|
|
* PARAMETERS: pathname - Directory to find Linux customized table
|
|
* signature - ACPI Signature for desired table. Must be
|
|
* a null terminated 4-character string.
|
|
* instance - Multiple table support for SSDT/UEFI (0...n)
|
|
* Must be 0 for other tables.
|
|
* table - Where a pointer to the table is returned
|
|
* address - Where the table physical address is returned
|
|
*
|
|
* RETURN: Status; Table buffer is returned if AE_OK.
|
|
* AE_LIMIT: Instance is beyond valid limit
|
|
* AE_NOT_FOUND: A table with the signature was not found
|
|
*
|
|
* DESCRIPTION: Get an OS customized table.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static acpi_status
|
|
osl_get_customized_table(char *pathname,
|
|
char *signature,
|
|
u32 instance,
|
|
struct acpi_table_header **table,
|
|
acpi_physical_address *address)
|
|
{
|
|
void *table_dir;
|
|
u32 current_instance = 0;
|
|
char temp_name[ACPI_NAMESEG_SIZE];
|
|
char table_filename[PATH_MAX];
|
|
char *filename;
|
|
acpi_status status;
|
|
|
|
/* Open the directory for customized tables */
|
|
|
|
table_dir = acpi_os_open_directory(pathname, "*", REQUEST_FILE_ONLY);
|
|
if (!table_dir) {
|
|
return (osl_get_last_status(AE_NOT_FOUND));
|
|
}
|
|
|
|
/* Attempt to find the table in the directory */
|
|
|
|
while ((filename = acpi_os_get_next_filename(table_dir))) {
|
|
|
|
/* Ignore meaningless files */
|
|
|
|
if (!ACPI_COMPARE_NAMESEG(filename, signature)) {
|
|
continue;
|
|
}
|
|
|
|
/* Extract table name and instance number */
|
|
|
|
status =
|
|
osl_table_name_from_file(filename, temp_name,
|
|
¤t_instance);
|
|
|
|
/* Ignore meaningless files */
|
|
|
|
if (ACPI_FAILURE(status) || current_instance != instance) {
|
|
continue;
|
|
}
|
|
|
|
/* Create the table pathname */
|
|
|
|
if (instance != 0) {
|
|
sprintf(table_filename, "%s/%4.4s%d", pathname,
|
|
temp_name, instance);
|
|
} else {
|
|
sprintf(table_filename, "%s/%4.4s", pathname,
|
|
temp_name);
|
|
}
|
|
break;
|
|
}
|
|
|
|
acpi_os_close_directory(table_dir);
|
|
|
|
if (!filename) {
|
|
return (AE_LIMIT);
|
|
}
|
|
|
|
/* There is no physical address saved for customized tables, use zero */
|
|
|
|
*address = 0;
|
|
status = osl_read_table_from_file(table_filename, 0, NULL, table);
|
|
|
|
return (status);
|
|
}
|