381 lines
12 KiB
C
381 lines
12 KiB
C
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/******************************************************************************
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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 - 2006, 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 *new_gas_struct,
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u8 bit_width, u64 address);
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static void acpi_tb_fadt_register_error(char *register_name, u32 value);
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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 used for conversion of FADT to common format */
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typedef struct acpi_fadt_conversion {
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u8 target;
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u8 source;
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u8 length;
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} acpi_fadt_conversion;
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static struct acpi_fadt_conversion fadt_conversion_table[] = {
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{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)},
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{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)},
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{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)},
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{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)},
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{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)},
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{ACPI_FADT_OFFSET(xpm_timer_block), ACPI_FADT_OFFSET(pm_timer_block),
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ACPI_FADT_OFFSET(pm_timer_length)},
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{ACPI_FADT_OFFSET(xgpe0_block), ACPI_FADT_OFFSET(gpe0_block),
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ACPI_FADT_OFFSET(gpe0_block_length)},
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{ACPI_FADT_OFFSET(xgpe1_block), ACPI_FADT_OFFSET(gpe1_block),
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ACPI_FADT_OFFSET(gpe1_block_length)}
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};
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#define ACPI_FADT_CONVERSION_ENTRIES (sizeof (fadt_conversion_table) / sizeof (struct acpi_fadt_conversion))
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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: new_gas_struct - 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 GAS 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 *new_gas_struct,
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u8 bit_width, u64 address)
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{
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ACPI_MOVE_64_TO_64(&new_gas_struct->address, &address);
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new_gas_struct->space_id = ACPI_ADR_SPACE_SYSTEM_IO;
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new_gas_struct->bit_width = bit_width;
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new_gas_struct->bit_offset = 0;
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new_gas_struct->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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* Special case for the FADT because of multiple versions and the fact
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* that 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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/* Copy the entire FADT locally */
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ACPI_MEMSET(&acpi_gbl_FADT, 0, 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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acpi_os_unmap_memory(table, length);
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/* Convert local FADT to the common internal format */
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acpi_tb_convert_fadt();
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/* Extract the DSDT and FACS tables from 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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/* Validate important FADT values */
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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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*
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* NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), and must contain
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* 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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/* Expand the FACS and DSDT addresses 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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* Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address
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* structures as necessary.
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*/
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for (i = 0; i < ACPI_FADT_CONVERSION_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_conversion_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_conversion_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_conversion_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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/* PM1A 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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/* PM1B is optional; leave null 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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}
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/* Global FADT is the new common V2.0 FADT */
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acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
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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: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Validate various ACPI registers in the FADT
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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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/* These length fields have a minimum value */
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if (acpi_gbl_FADT.pm1_event_length < 4) {
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acpi_tb_fadt_register_error("Pm1EventLength",
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(u32) acpi_gbl_FADT.
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pm1_event_length);
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}
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if (acpi_gbl_FADT.pm_timer_length < 4) {
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acpi_tb_fadt_register_error("PmTimerLength",
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(u32) acpi_gbl_FADT.
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pm_timer_length);
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}
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/* These length and address fields must be non-zero */
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if (!acpi_gbl_FADT.pm1_control_length) {
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acpi_tb_fadt_register_error("Pm1ControlLength", 0);
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}
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if (!acpi_gbl_FADT.xpm1a_event_block.address) {
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acpi_tb_fadt_register_error("XPm1aEventBlock.Address", 0);
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}
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if (!acpi_gbl_FADT.xpm1a_control_block.address) {
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acpi_tb_fadt_register_error("XPm1aControlBlock.Address", 0);
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}
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if (!acpi_gbl_FADT.xpm_timer_block.address) {
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acpi_tb_fadt_register_error("XPmTimerBlock.Address", 0);
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}
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/* If PM2 block is present, must have non-zero length */
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if ((acpi_gbl_FADT.xpm2_control_block.address &&
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!acpi_gbl_FADT.pm2_control_length)) {
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acpi_tb_fadt_register_error("Pm2ControlLength",
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(u32) acpi_gbl_FADT.
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pm2_control_length);
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}
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/* Length of any valid GPE blocks must be a multiple of 2 */
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if (acpi_gbl_FADT.xgpe0_block.address &&
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(acpi_gbl_FADT.gpe0_block_length & 1)) {
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acpi_tb_fadt_register_error("Gpe0BlockLength",
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(u32) acpi_gbl_FADT.
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gpe0_block_length);
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}
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if (acpi_gbl_FADT.xgpe1_block.address &&
|
||
|
|
(acpi_gbl_FADT.gpe1_block_length & 1)) {
|
||
|
|
acpi_tb_fadt_register_error("Gpe1BlockLength",
|
||
|
|
(u32) acpi_gbl_FADT.
|
||
|
|
gpe1_block_length);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_tb_fadt_register_error
|
||
|
|
*
|
||
|
|
* PARAMETERS: register_name - Pointer to string identifying register
|
||
|
|
* Value - Actual register contents value
|
||
|
|
*
|
||
|
|
* RETURN: None
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Display FADT warning message
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
static void acpi_tb_fadt_register_error(char *register_name, u32 value)
|
||
|
|
{
|
||
|
|
|
||
|
|
ACPI_WARNING((AE_INFO, "Invalid FADT value \"%s\" = %X",
|
||
|
|
register_name, value));
|
||
|
|
}
|