4bf273939c
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
703 lines
21 KiB
C
703 lines
21 KiB
C
/******************************************************************************
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*
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* Module Name: tbutils - 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("tbutils")
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/* Local prototypes */
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static void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags);
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static void acpi_tb_convert_fadt(void);
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static void
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acpi_tb_install_table(acpi_physical_address address,
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u8 flags, char *signature, acpi_native_uint table_index);
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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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/* 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_print_table_header
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*
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* PARAMETERS: Address - Table physical address
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* Header - Table header
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*
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* RETURN: None
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*
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* DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP.
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*
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******************************************************************************/
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void
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acpi_tb_print_table_header(acpi_physical_address address,
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struct acpi_table_header *header)
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{
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if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) {
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/* FACS only has signature and length fields of common table header */
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ACPI_INFO((AE_INFO, "%4.4s @ 0x%p/0x%04X",
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header->signature, ACPI_CAST_PTR(void, address),
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header->length));
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} else if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_RSDP)) {
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/* RSDP has no common fields */
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ACPI_INFO((AE_INFO, "RSDP @ 0x%p/0x%04X (v%3.3d %6.6s)",
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ACPI_CAST_PTR(void, address),
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(((struct acpi_table_rsdp *)header)->revision > 0) ?
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((struct acpi_table_rsdp *)header)->length : 20,
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((struct acpi_table_rsdp *)header)->revision,
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((struct acpi_table_rsdp *)header)->oem_id));
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} else {
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/* Standard ACPI table with full common header */
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ACPI_INFO((AE_INFO,
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"%4.4s @ 0x%p/0x%04X (v%3.3d %6.6s %8.8s 0x%08X %4.4s 0x%08X)",
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header->signature, ACPI_CAST_PTR(void, address),
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header->length, header->revision, header->oem_id,
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header->oem_table_id, header->oem_revision,
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header->asl_compiler_id,
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header->asl_compiler_revision));
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}
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}
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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_validate_checksum
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*
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* PARAMETERS: Table - ACPI table to verify
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* Length - Length of entire table
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*
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* RETURN: Status
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*
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* DESCRIPTION: Verifies that the table checksums to zero. Optionally returns
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* exception on bad checksum.
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*
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******************************************************************************/
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acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length)
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{
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u8 checksum;
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/* Compute the checksum on the table */
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checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length);
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/* Checksum ok? (should be zero) */
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if (checksum) {
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ACPI_WARNING((AE_INFO,
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"Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X",
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table->signature, table->checksum,
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(u8) (table->checksum - checksum)));
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#if (ACPI_CHECKSUM_ABORT)
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return (AE_BAD_CHECKSUM);
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#endif
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}
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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_tb_checksum
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*
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* PARAMETERS: Buffer - Pointer to memory region to be checked
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* Length - Length of this memory region
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*
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* RETURN: Checksum (u8)
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*
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* DESCRIPTION: Calculates circular checksum of memory region.
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*
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******************************************************************************/
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u8 acpi_tb_checksum(u8 * buffer, acpi_native_uint length)
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{
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u8 sum = 0;
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u8 *end = buffer + length;
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while (buffer < end) {
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sum = (u8) (sum + *(buffer++));
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}
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return sum;
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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 V1.0 addresses to the "X" generic address structs,
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* 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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*ACPI_ADD_PTR(u32,
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&acpi_gbl_FADT,
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fadt_conversion_table
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[i].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_install_table
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*
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* PARAMETERS: Address - Physical address of DSDT or FACS
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* Flags - Flags
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* Signature - Table signature, NULL if no need to
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* match
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* table_index - Index into root table array
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*
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* RETURN: None
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*
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* DESCRIPTION: Install an ACPI table into the global data structure.
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*
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******************************************************************************/
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static void
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acpi_tb_install_table(acpi_physical_address address,
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u8 flags, char *signature, acpi_native_uint table_index)
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{
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struct acpi_table_header *table;
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if (!address) {
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ACPI_ERROR((AE_INFO,
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"Null physical address for ACPI table [%s]",
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signature));
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return;
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}
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/* Map just the table header */
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table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
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if (!table) {
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return;
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}
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/* If a particular signature is expected, signature must match */
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if (signature && !ACPI_COMPARE_NAME(table->signature, signature)) {
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ACPI_ERROR((AE_INFO,
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"Invalid signature 0x%X for ACPI table [%s]",
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*ACPI_CAST_PTR(u32, table->signature), signature));
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goto unmap_and_exit;
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}
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/* Initialize the table entry */
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acpi_gbl_root_table_list.tables[table_index].address = address;
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acpi_gbl_root_table_list.tables[table_index].length = table->length;
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acpi_gbl_root_table_list.tables[table_index].flags = flags;
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ACPI_MOVE_32_TO_32(&
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(acpi_gbl_root_table_list.tables[table_index].
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signature), table->signature);
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acpi_tb_print_table_header(address, table);
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if (table_index == ACPI_TABLE_INDEX_DSDT) {
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/* Global integer width is based upon revision of the DSDT */
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acpi_ut_set_integer_width(table->revision);
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}
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unmap_and_exit:
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acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
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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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static 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, sizeof(struct acpi_table_fadt), 0);
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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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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_parse_root_table
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*
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* PARAMETERS: Rsdp - Pointer to the RSDP
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* Flags - Flags
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to parse the Root System Description
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* Table (RSDT or XSDT)
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*
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* NOTE: Tables are mapped (not copied) for efficiency. The FACS must
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* be mapped and cannot be copied because it contains the actual
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* memory location of the ACPI Global Lock.
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*
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******************************************************************************/
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acpi_status
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acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags)
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{
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struct acpi_table_rsdp *rsdp;
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acpi_native_uint table_entry_size;
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acpi_native_uint i;
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u32 table_count;
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struct acpi_table_header *table;
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acpi_physical_address address;
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u32 length;
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u8 *table_entry;
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acpi_status status;
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ACPI_FUNCTION_TRACE(tb_parse_root_table);
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|
|
|
/*
|
|
* Map the entire RSDP and extract the address of the RSDT or XSDT
|
|
*/
|
|
rsdp = acpi_os_map_memory(rsdp_address, sizeof(struct acpi_table_rsdp));
|
|
if (!rsdp) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
acpi_tb_print_table_header(rsdp_address,
|
|
ACPI_CAST_PTR(struct acpi_table_header,
|
|
rsdp));
|
|
|
|
/* Differentiate between RSDT and XSDT root tables */
|
|
|
|
if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
|
|
/*
|
|
* Root table is an XSDT (64-bit physical addresses). We must use the
|
|
* XSDT if the revision is > 1 and the XSDT pointer is present, as per
|
|
* the ACPI specification.
|
|
*/
|
|
address = (acpi_physical_address) rsdp->xsdt_physical_address;
|
|
table_entry_size = sizeof(u64);
|
|
} else {
|
|
/* Root table is an RSDT (32-bit physical addresses) */
|
|
|
|
address = (acpi_physical_address) rsdp->rsdt_physical_address;
|
|
table_entry_size = sizeof(u32);
|
|
}
|
|
|
|
/*
|
|
* It is not possible to map more than one entry in some environments,
|
|
* so unmap the RSDP here before mapping other tables
|
|
*/
|
|
acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp));
|
|
|
|
/* Map the RSDT/XSDT table header to get the full table length */
|
|
|
|
table = acpi_os_map_memory(address, sizeof(struct acpi_table_header));
|
|
if (!table) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
acpi_tb_print_table_header(address, table);
|
|
|
|
/* Get the length of the full table, verify length and map entire table */
|
|
|
|
length = table->length;
|
|
acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
|
|
|
|
if (length < sizeof(struct acpi_table_header)) {
|
|
ACPI_ERROR((AE_INFO, "Invalid length 0x%X in RSDT/XSDT",
|
|
length));
|
|
return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
|
|
}
|
|
|
|
table = acpi_os_map_memory(address, length);
|
|
if (!table) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Validate the root table checksum */
|
|
|
|
status = acpi_tb_verify_checksum(table, length);
|
|
if (ACPI_FAILURE(status)) {
|
|
acpi_os_unmap_memory(table, length);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Calculate the number of tables described in the root table */
|
|
|
|
table_count =
|
|
(table->length -
|
|
sizeof(struct acpi_table_header)) / table_entry_size;
|
|
|
|
/*
|
|
* First two entries in the table array are reserved for the DSDT and FACS,
|
|
* which are not actually present in the RSDT/XSDT - they come from the FADT
|
|
*/
|
|
table_entry =
|
|
ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header);
|
|
acpi_gbl_root_table_list.count = 2;
|
|
|
|
/*
|
|
* Initialize the root table array from the RSDT/XSDT
|
|
*/
|
|
for (i = 0; i < table_count; i++) {
|
|
if (acpi_gbl_root_table_list.count >=
|
|
acpi_gbl_root_table_list.size) {
|
|
|
|
/* There is no more room in the root table array, attempt resize */
|
|
|
|
status = acpi_tb_resize_root_table_list();
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_WARNING((AE_INFO,
|
|
"Truncating %u table entries!",
|
|
(unsigned)
|
|
(acpi_gbl_root_table_list.size -
|
|
acpi_gbl_root_table_list.
|
|
count)));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get the table physical address (32-bit for RSDT, 64-bit for XSDT)
|
|
*/
|
|
if ((table_entry_size == sizeof(u32)) ||
|
|
(sizeof(acpi_physical_address) == sizeof(u32))) {
|
|
/*
|
|
* 32-bit platform, RSDT: Move 32-bit to 32-bit
|
|
* 32-bit platform, XSDT: Truncate 64-bit to 32-bit
|
|
* 64-bit platform, RSDT: Expand 32-bit to 64-bit
|
|
*
|
|
* Note: Addresses are 32-bit aligned in both RSDT and XSDT
|
|
*/
|
|
acpi_gbl_root_table_list.
|
|
tables[acpi_gbl_root_table_list.count].address =
|
|
(acpi_physical_address) (*ACPI_CAST_PTR
|
|
(u32, table_entry));
|
|
} else {
|
|
/*
|
|
* 64-bit platform, XSDT: Move 64-bit to 64-bit
|
|
*
|
|
* Note: 64-bit addresses are only 32-bit aligned in the XSDT
|
|
*/
|
|
ACPI_MOVE_64_TO_64(&acpi_gbl_root_table_list.
|
|
tables[acpi_gbl_root_table_list.
|
|
count].address, table_entry);
|
|
}
|
|
|
|
table_entry += table_entry_size;
|
|
acpi_gbl_root_table_list.count++;
|
|
}
|
|
|
|
/*
|
|
* It is not possible to map more than one entry in some environments,
|
|
* so unmap the root table here before mapping other tables
|
|
*/
|
|
acpi_os_unmap_memory(table, length);
|
|
|
|
/*
|
|
* Complete the initialization of the root table array by examining
|
|
* the header of each table
|
|
*/
|
|
for (i = 2; i < acpi_gbl_root_table_list.count; i++) {
|
|
acpi_tb_install_table(acpi_gbl_root_table_list.tables[i].
|
|
address, flags, NULL, i);
|
|
|
|
/* Special case for FADT - get the DSDT and FACS */
|
|
|
|
if (ACPI_COMPARE_NAME
|
|
(&acpi_gbl_root_table_list.tables[i].signature,
|
|
ACPI_SIG_FADT)) {
|
|
acpi_tb_parse_fadt(i, flags);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_map
|
|
*
|
|
* PARAMETERS: Address - Address to be mapped
|
|
* Length - Length to be mapped
|
|
* Flags - Logical or physical addressing mode
|
|
*
|
|
* RETURN: Pointer to mapped region
|
|
*
|
|
* DESCRIPTION: Maps memory according to flag
|
|
*
|
|
*****************************************************************************/
|
|
|
|
void *acpi_tb_map(acpi_physical_address address, u32 length, u32 flags)
|
|
{
|
|
|
|
if (flags == ACPI_TABLE_ORIGIN_MAPPED) {
|
|
return (acpi_os_map_memory(address, length));
|
|
} else {
|
|
return (ACPI_CAST_PTR(void, address));
|
|
}
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_unmap
|
|
*
|
|
* PARAMETERS: Pointer - To mapped region
|
|
* Length - Length to be unmapped
|
|
* Flags - Logical or physical addressing mode
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Unmaps memory according to flag
|
|
*
|
|
*****************************************************************************/
|
|
|
|
void acpi_tb_unmap(void *pointer, u32 length, u32 flags)
|
|
{
|
|
|
|
if (flags == ACPI_TABLE_ORIGIN_MAPPED) {
|
|
acpi_os_unmap_memory(pointer, length);
|
|
}
|
|
}
|