55f8f3cc4f
Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that contained invalid non-zero values in reserved fields could cause later failures because these fields have meaning in later revisions of the FADT. For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (Preferred_PM_Profile, PSTATE_CNT, CST_CNT, IAPC_BOOT_FLAGS.) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
457 lines
15 KiB
C
457 lines
15 KiB
C
/******************************************************************************
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*
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* Module Name: tbfadt - FADT table utilities
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2007, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/actables.h>
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME("tbfadt")
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/* Local prototypes */
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static void inline
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acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
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u8 bit_width, u64 address);
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static void acpi_tb_convert_fadt(void);
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static void acpi_tb_validate_fadt(void);
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/* Table for conversion of FADT to common internal format and FADT validation */
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typedef struct acpi_fadt_info {
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char *name;
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u8 target;
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u8 source;
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u8 length;
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u8 type;
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} acpi_fadt_info;
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#define ACPI_FADT_REQUIRED 1
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#define ACPI_FADT_SEPARATE_LENGTH 2
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static struct acpi_fadt_info fadt_info_table[] = {
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{"Pm1aEventBlock", ACPI_FADT_OFFSET(xpm1a_event_block),
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ACPI_FADT_OFFSET(pm1a_event_block),
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ACPI_FADT_OFFSET(pm1_event_length), ACPI_FADT_REQUIRED},
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{"Pm1bEventBlock", ACPI_FADT_OFFSET(xpm1b_event_block),
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ACPI_FADT_OFFSET(pm1b_event_block),
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ACPI_FADT_OFFSET(pm1_event_length), 0},
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{"Pm1aControlBlock", ACPI_FADT_OFFSET(xpm1a_control_block),
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ACPI_FADT_OFFSET(pm1a_control_block),
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ACPI_FADT_OFFSET(pm1_control_length), ACPI_FADT_REQUIRED},
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{"Pm1bControlBlock", ACPI_FADT_OFFSET(xpm1b_control_block),
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ACPI_FADT_OFFSET(pm1b_control_block),
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ACPI_FADT_OFFSET(pm1_control_length), 0},
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{"Pm2ControlBlock", ACPI_FADT_OFFSET(xpm2_control_block),
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ACPI_FADT_OFFSET(pm2_control_block),
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ACPI_FADT_OFFSET(pm2_control_length), ACPI_FADT_SEPARATE_LENGTH},
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{"PmTimerBlock", ACPI_FADT_OFFSET(xpm_timer_block),
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ACPI_FADT_OFFSET(pm_timer_block),
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ACPI_FADT_OFFSET(pm_timer_length), ACPI_FADT_REQUIRED},
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{"Gpe0Block", ACPI_FADT_OFFSET(xgpe0_block),
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ACPI_FADT_OFFSET(gpe0_block),
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ACPI_FADT_OFFSET(gpe0_block_length), ACPI_FADT_SEPARATE_LENGTH},
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{"Gpe1Block", ACPI_FADT_OFFSET(xgpe1_block),
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ACPI_FADT_OFFSET(gpe1_block),
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ACPI_FADT_OFFSET(gpe1_block_length), ACPI_FADT_SEPARATE_LENGTH}
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};
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#define ACPI_FADT_INFO_ENTRIES (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info))
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_init_generic_address
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*
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* PARAMETERS: generic_address - GAS struct to be initialized
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* bit_width - Width of this register
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* Address - Address of the register
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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize a Generic Address Structure (GAS)
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* See the ACPI specification for a full description and
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* definition of this structure.
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*
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******************************************************************************/
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static void inline
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acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
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u8 bit_width, u64 address)
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{
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/*
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* The 64-bit Address field is non-aligned in the byte packed
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* GAS struct.
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*/
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ACPI_MOVE_64_TO_64(&generic_address->address, &address);
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/* All other fields are byte-wide */
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generic_address->space_id = ACPI_ADR_SPACE_SYSTEM_IO;
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generic_address->bit_width = bit_width;
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generic_address->bit_offset = 0;
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generic_address->access_width = 0;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_parse_fadt
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*
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* PARAMETERS: table_index - Index for the FADT
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* Flags - Flags
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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize the FADT, DSDT and FACS tables
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* (FADT contains the addresses of the DSDT and FACS)
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*
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******************************************************************************/
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void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
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{
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u32 length;
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struct acpi_table_header *table;
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/*
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* The FADT has multiple versions with different lengths,
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* and it contains pointers to both the DSDT and FACS tables.
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*
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* Get a local copy of the FADT and convert it to a common format
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* Map entire FADT, assumed to be smaller than one page.
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*/
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length = acpi_gbl_root_table_list.tables[table_index].length;
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table =
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acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index].
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address, length);
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if (!table) {
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return;
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}
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/*
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* Validate the FADT checksum before we copy the table. Ignore
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* checksum error as we want to try to get the DSDT and FACS.
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*/
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(void)acpi_tb_verify_checksum(table, length);
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/* Obtain a local copy of the FADT in common ACPI 2.0+ format */
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acpi_tb_create_local_fadt(table, length);
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/* All done with the real FADT, unmap it */
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acpi_os_unmap_memory(table, length);
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/* Obtain the DSDT and FACS tables via their addresses within the FADT */
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acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt,
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flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT);
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acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs,
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flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_create_local_fadt
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*
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* PARAMETERS: Table - Pointer to BIOS FADT
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* Length - Length of the table
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*
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* RETURN: None
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*
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* DESCRIPTION: Get a local copy of the FADT and convert it to a common format.
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* Performs validation on some important FADT fields.
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*
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* NOTE: We create a local copy of the FADT regardless of the version.
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*
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******************************************************************************/
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void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length)
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{
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/*
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* Check if the FADT is larger than the largest table that we expect
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* (the ACPI 2.0/3.0 version). If so, truncate the table, and issue
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* a warning.
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*/
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if (length > sizeof(struct acpi_table_fadt)) {
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ACPI_WARNING((AE_INFO,
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"FADT (revision %u) is longer than ACPI 2.0 version, truncating length 0x%X to 0x%zX",
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table->revision, (unsigned)length,
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sizeof(struct acpi_table_fadt)));
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}
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/* Clear the entire local FADT */
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ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt));
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/* Copy the original FADT, up to sizeof (struct acpi_table_fadt) */
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ACPI_MEMCPY(&acpi_gbl_FADT, table,
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ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
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/*
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* 1) Convert the local copy of the FADT to the common internal format
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* 2) Validate some of the important values within the FADT
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*/
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acpi_tb_convert_fadt();
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acpi_tb_validate_fadt();
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_convert_fadt
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*
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* PARAMETERS: None, uses acpi_gbl_FADT
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*
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* RETURN: None
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*
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* DESCRIPTION: Converts all versions of the FADT to a common internal format.
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* Expand all 32-bit addresses to 64-bit.
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*
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* NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt),
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* and must contain a copy of the actual FADT.
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*
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* ACPICA will use the "X" fields of the FADT for all addresses.
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*
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* "X" fields are optional extensions to the original V1.0 fields. Even if
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* they are present in the structure, they can be optionally not used by
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* setting them to zero. Therefore, we must selectively expand V1.0 fields
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* if the corresponding X field is zero.
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*
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* For ACPI 1.0 FADTs, all address fields are expanded to the corresponding
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* "X" fields.
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*
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* For ACPI 2.0 FADTs, any "X" fields that are NULL are filled in by
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* expanding the corresponding ACPI 1.0 field.
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*
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******************************************************************************/
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static void acpi_tb_convert_fadt(void)
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{
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u8 pm1_register_length;
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struct acpi_generic_address *target;
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acpi_native_uint i;
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/* Update the local FADT table header length */
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acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
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/* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary */
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if (!acpi_gbl_FADT.Xfacs) {
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acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
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}
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if (!acpi_gbl_FADT.Xdsdt) {
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acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt;
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}
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/*
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* For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
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* should be zero are indeed zero. This will workaround BIOSs that
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* inadvertently place values in these fields.
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*
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* The ACPI 1.0 reserved fields that will be zeroed are the bytes located at
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* offset 45, 55, 95, and the word located at offset 109, 110.
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*/
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if (acpi_gbl_FADT.header.revision < 3) {
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acpi_gbl_FADT.preferred_profile = 0;
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acpi_gbl_FADT.pstate_control = 0;
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acpi_gbl_FADT.cst_control = 0;
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acpi_gbl_FADT.boot_flags = 0;
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}
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/*
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* Expand the ACPI 1.0 32-bit V1.0 addresses to the ACPI 2.0 64-bit "X"
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* generic address structures as necessary.
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*/
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for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
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target =
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ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
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fadt_info_table[i].target);
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/* Expand only if the X target is null */
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if (!target->address) {
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acpi_tb_init_generic_address(target,
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*ACPI_ADD_PTR(u8,
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&acpi_gbl_FADT,
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fadt_info_table
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[i].length),
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(u64) * ACPI_ADD_PTR(u32,
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&acpi_gbl_FADT,
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fadt_info_table
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[i].
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source));
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}
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}
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/*
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* Calculate separate GAS structs for the PM1 Enable registers.
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* These addresses do not appear (directly) in the FADT, so it is
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* useful to calculate them once, here.
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*
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* The PM event blocks are split into two register blocks, first is the
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* PM Status Register block, followed immediately by the PM Enable Register
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* block. Each is of length (pm1_event_length/2)
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*/
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pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length);
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/* The PM1A register block is required */
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acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
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pm1_register_length,
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(acpi_gbl_FADT.xpm1a_event_block.address +
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pm1_register_length));
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/* Don't forget to copy space_id of the GAS */
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acpi_gbl_xpm1a_enable.space_id =
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acpi_gbl_FADT.xpm1a_event_block.space_id;
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/* The PM1B register block is optional, ignore if not present */
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if (acpi_gbl_FADT.xpm1b_event_block.address) {
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acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
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pm1_register_length,
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(acpi_gbl_FADT.xpm1b_event_block.
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address + pm1_register_length));
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/* Don't forget to copy space_id of the GAS */
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acpi_gbl_xpm1b_enable.space_id =
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acpi_gbl_FADT.xpm1a_event_block.space_id;
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}
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_tb_validate_fadt
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*
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* PARAMETERS: Table - Pointer to the FADT to be validated
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*
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* RETURN: None
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*
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* DESCRIPTION: Validate various important fields within the FADT. If a problem
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* is found, issue a message, but no status is returned.
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* Used by both the table manager and the disassembler.
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*
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* Possible additional checks:
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* (acpi_gbl_FADT.pm1_event_length >= 4)
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* (acpi_gbl_FADT.pm1_control_length >= 2)
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* (acpi_gbl_FADT.pm_timer_length >= 4)
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* Gpe block lengths must be multiple of 2
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*
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******************************************************************************/
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static void acpi_tb_validate_fadt(void)
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{
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u32 *address32;
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struct acpi_generic_address *address64;
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u8 length;
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acpi_native_uint i;
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/* Examine all of the 64-bit extended address fields (X fields) */
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for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
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/* Generate pointers to the 32-bit and 64-bit addresses and get the length */
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address64 =
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ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
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fadt_info_table[i].target);
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address32 =
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ACPI_ADD_PTR(u32, &acpi_gbl_FADT,
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fadt_info_table[i].source);
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length =
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*ACPI_ADD_PTR(u8, &acpi_gbl_FADT,
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fadt_info_table[i].length);
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if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) {
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/*
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* Field is required (Pm1a_event, Pm1a_control, pm_timer).
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* Both the address and length must be non-zero.
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*/
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if (!address64->address || !length) {
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ACPI_ERROR((AE_INFO,
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"Required field \"%s\" has zero address and/or length: %8.8X%8.8X/%X",
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fadt_info_table[i].name,
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ACPI_FORMAT_UINT64(address64->
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address),
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length));
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}
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} else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) {
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/*
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* Field is optional (PM2Control, GPE0, GPE1) AND has its own
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* length field. If present, both the address and length must be valid.
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*/
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if ((address64->address && !length)
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|| (!address64->address && length)) {
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ACPI_WARNING((AE_INFO,
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"Optional field \"%s\" has zero address or length: %8.8X%8.8X/%X",
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fadt_info_table[i].name,
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ACPI_FORMAT_UINT64(address64->
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address),
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length));
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}
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}
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/* If both 32- and 64-bit addresses are valid (non-zero), they must match */
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if (address64->address && *address32 &&
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(address64->address != (u64) * address32)) {
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ACPI_ERROR((AE_INFO,
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"32/64X address mismatch in \"%s\": [%8.8X] [%8.8X%8.8X], using 64X",
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fadt_info_table[i].name, *address32,
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ACPI_FORMAT_UINT64(address64->address)));
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}
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}
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}
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