forked from Minki/linux
616 lines
19 KiB
C
616 lines
19 KiB
C
/******************************************************************************
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*
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* Module Name: tbconvrt - ACPI Table conversion utilities
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, 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 <linux/module.h>
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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("tbconvrt")
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/* Local prototypes */
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static void
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acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
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u8 register_bit_width,
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acpi_physical_address address);
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static void
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acpi_tb_convert_fadt1(struct fadt_descriptor_rev2 *local_fadt,
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struct fadt_descriptor_rev1 *original_fadt);
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static void
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acpi_tb_convert_fadt2(struct fadt_descriptor_rev2 *local_fadt,
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struct fadt_descriptor_rev2 *original_fadt);
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u8 acpi_fadt_is_v1;
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EXPORT_SYMBOL(acpi_fadt_is_v1);
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_get_table_count
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*
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* PARAMETERS: RSDP - Pointer to the RSDP
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* RSDT - Pointer to the RSDT/XSDT
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*
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* RETURN: The number of tables pointed to by the RSDT or XSDT.
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*
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* DESCRIPTION: Calculate the number of tables. Automatically handles either
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* an RSDT or XSDT.
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*
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******************************************************************************/
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u32
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acpi_tb_get_table_count(struct rsdp_descriptor *RSDP,
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struct acpi_table_header *RSDT)
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{
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u32 pointer_size;
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ACPI_FUNCTION_ENTRY();
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/* RSDT pointers are 32 bits, XSDT pointers are 64 bits */
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if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
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pointer_size = sizeof(u32);
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} else {
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pointer_size = sizeof(u64);
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}
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/*
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* Determine the number of tables pointed to by the RSDT/XSDT.
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* This is defined by the ACPI Specification to be the number of
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* pointers contained within the RSDT/XSDT. The size of the pointers
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* is architecture-dependent.
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*/
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return ((RSDT->length -
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sizeof(struct acpi_table_header)) / pointer_size);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_convert_to_xsdt
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*
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* PARAMETERS: table_info - Info about the RSDT
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an RSDT to an XSDT (internal common format)
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*
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******************************************************************************/
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acpi_status acpi_tb_convert_to_xsdt(struct acpi_table_desc *table_info)
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{
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acpi_size table_size;
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u32 i;
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XSDT_DESCRIPTOR *new_table;
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ACPI_FUNCTION_ENTRY();
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/* Compute size of the converted XSDT */
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table_size = ((acpi_size) acpi_gbl_rsdt_table_count * sizeof(u64)) +
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sizeof(struct acpi_table_header);
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/* Allocate an XSDT */
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new_table = ACPI_MEM_CALLOCATE(table_size);
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if (!new_table) {
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return (AE_NO_MEMORY);
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}
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/* Copy the header and set the length */
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ACPI_MEMCPY(new_table, table_info->pointer,
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sizeof(struct acpi_table_header));
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new_table->length = (u32) table_size;
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/* Copy the table pointers */
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for (i = 0; i < acpi_gbl_rsdt_table_count; i++) {
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/* RSDT pointers are 32 bits, XSDT pointers are 64 bits */
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if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
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ACPI_STORE_ADDRESS(new_table->table_offset_entry[i],
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(ACPI_CAST_PTR
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(struct rsdt_descriptor_rev1,
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table_info->pointer))->
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table_offset_entry[i]);
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} else {
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new_table->table_offset_entry[i] =
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(ACPI_CAST_PTR(XSDT_DESCRIPTOR,
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table_info->pointer))->
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table_offset_entry[i];
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}
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}
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/* Delete the original table (either mapped or in a buffer) */
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acpi_tb_delete_single_table(table_info);
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/* Point the table descriptor to the new table */
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table_info->pointer =
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ACPI_CAST_PTR(struct acpi_table_header, new_table);
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table_info->length = table_size;
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table_info->allocation = ACPI_MEM_ALLOCATED;
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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_init_generic_address
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*
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* PARAMETERS: new_gas_struct - GAS struct to be initialized
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* register_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
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acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
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u8 register_bit_width,
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acpi_physical_address address)
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{
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ACPI_STORE_ADDRESS(new_gas_struct->address, address);
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new_gas_struct->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
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new_gas_struct->register_bit_width = register_bit_width;
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new_gas_struct->register_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_convert_fadt1
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*
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* PARAMETERS: local_fadt - Pointer to new FADT
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* original_fadt - Pointer to old FADT
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*
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* RETURN: None, populates local_fadt
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*
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* DESCRIPTION: Convert an ACPI 1.0 FADT to common internal format
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*
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******************************************************************************/
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static void
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acpi_tb_convert_fadt1(struct fadt_descriptor_rev2 *local_fadt,
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struct fadt_descriptor_rev1 *original_fadt)
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{
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/* ACPI 1.0 FACS */
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/* The BIOS stored FADT should agree with Revision 1.0 */
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acpi_fadt_is_v1 = 1;
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/*
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* Copy the table header and the common part of the tables.
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*
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* The 2.0 table is an extension of the 1.0 table, so the entire 1.0
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* table can be copied first, then expand some fields to 64 bits.
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*/
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ACPI_MEMCPY(local_fadt, original_fadt,
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sizeof(struct fadt_descriptor_rev1));
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/* Convert table pointers to 64-bit fields */
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ACPI_STORE_ADDRESS(local_fadt->xfirmware_ctrl,
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local_fadt->V1_firmware_ctrl);
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ACPI_STORE_ADDRESS(local_fadt->Xdsdt, local_fadt->V1_dsdt);
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/*
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* System Interrupt Model isn't used in ACPI 2.0
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* (local_fadt->Reserved1 = 0;)
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*/
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/*
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* This field is set by the OEM to convey the preferred power management
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* profile to OSPM. It doesn't have any 1.0 equivalence. Since we don't
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* know what kind of 32-bit system this is, we will use "unspecified".
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*/
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local_fadt->prefer_PM_profile = PM_UNSPECIFIED;
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/*
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* Processor Performance State Control. This is the value OSPM writes to
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* the SMI_CMD register to assume processor performance state control
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* responsibility. There isn't any equivalence in 1.0, but as many 1.x
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* ACPI tables contain _PCT and _PSS we also keep this value, unless
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* acpi_strict is set.
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*/
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if (acpi_strict)
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local_fadt->pstate_cnt = 0;
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/*
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* Support for the _CST object and C States change notification.
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* This data item hasn't any 1.0 equivalence so leave it zero.
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*/
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local_fadt->cst_cnt = 0;
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/*
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* FADT Rev 2 was an interim FADT released between ACPI 1.0 and ACPI 2.0.
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* It primarily adds the FADT reset mechanism.
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*/
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if ((original_fadt->revision == 2) &&
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(original_fadt->length ==
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sizeof(struct fadt_descriptor_rev2_minus))) {
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/*
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* Grab the entire generic address struct, plus the 1-byte reset value
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* that immediately follows.
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*/
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ACPI_MEMCPY(&local_fadt->reset_register,
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&(ACPI_CAST_PTR(struct fadt_descriptor_rev2_minus,
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original_fadt))->reset_register,
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sizeof(struct acpi_generic_address) + 1);
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} else {
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/*
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* Since there isn't any equivalence in 1.0 and since it is highly
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* likely that a 1.0 system has legacy support.
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*/
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local_fadt->iapc_boot_arch = BAF_LEGACY_DEVICES;
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}
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/*
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* Convert the V1.0 block addresses to V2.0 GAS structures
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*/
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acpi_tb_init_generic_address(&local_fadt->xpm1a_evt_blk,
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local_fadt->pm1_evt_len,
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(acpi_physical_address) local_fadt->
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V1_pm1a_evt_blk);
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acpi_tb_init_generic_address(&local_fadt->xpm1b_evt_blk,
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local_fadt->pm1_evt_len,
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(acpi_physical_address) local_fadt->
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V1_pm1b_evt_blk);
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acpi_tb_init_generic_address(&local_fadt->xpm1a_cnt_blk,
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local_fadt->pm1_cnt_len,
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(acpi_physical_address) local_fadt->
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V1_pm1a_cnt_blk);
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acpi_tb_init_generic_address(&local_fadt->xpm1b_cnt_blk,
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local_fadt->pm1_cnt_len,
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(acpi_physical_address) local_fadt->
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V1_pm1b_cnt_blk);
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acpi_tb_init_generic_address(&local_fadt->xpm2_cnt_blk,
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local_fadt->pm2_cnt_len,
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(acpi_physical_address) local_fadt->
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V1_pm2_cnt_blk);
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acpi_tb_init_generic_address(&local_fadt->xpm_tmr_blk,
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local_fadt->pm_tm_len,
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(acpi_physical_address) local_fadt->
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V1_pm_tmr_blk);
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acpi_tb_init_generic_address(&local_fadt->xgpe0_blk, 0,
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(acpi_physical_address) local_fadt->
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V1_gpe0_blk);
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acpi_tb_init_generic_address(&local_fadt->xgpe1_blk, 0,
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(acpi_physical_address) local_fadt->
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V1_gpe1_blk);
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/* Create separate GAS structs for the PM1 Enable registers */
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acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
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(u8) ACPI_DIV_2(acpi_gbl_FADT->
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pm1_evt_len),
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(acpi_physical_address)
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(local_fadt->xpm1a_evt_blk.address +
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ACPI_DIV_2(acpi_gbl_FADT->pm1_evt_len)));
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/* PM1B is optional; leave null if not present */
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if (local_fadt->xpm1b_evt_blk.address) {
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acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
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(u8) ACPI_DIV_2(acpi_gbl_FADT->
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pm1_evt_len),
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(acpi_physical_address)
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(local_fadt->xpm1b_evt_blk.
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address +
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ACPI_DIV_2(acpi_gbl_FADT->
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pm1_evt_len)));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_convert_fadt2
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*
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* PARAMETERS: local_fadt - Pointer to new FADT
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* original_fadt - Pointer to old FADT
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*
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* RETURN: None, populates local_fadt
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*
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* DESCRIPTION: Convert an ACPI 2.0 FADT to common internal format.
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* Handles optional "X" fields.
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*
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******************************************************************************/
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static void
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acpi_tb_convert_fadt2(struct fadt_descriptor_rev2 *local_fadt,
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struct fadt_descriptor_rev2 *original_fadt)
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{
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/* We have an ACPI 2.0 FADT but we must copy it to our local buffer */
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ACPI_MEMCPY(local_fadt, original_fadt,
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sizeof(struct fadt_descriptor_rev2));
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/*
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* "X" fields are optional extensions to the original V1.0 fields, so
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* we must selectively expand V1.0 fields if the corresponding X field
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* is zero.
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*/
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if (!(local_fadt->xfirmware_ctrl)) {
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ACPI_STORE_ADDRESS(local_fadt->xfirmware_ctrl,
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local_fadt->V1_firmware_ctrl);
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}
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if (!(local_fadt->Xdsdt)) {
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ACPI_STORE_ADDRESS(local_fadt->Xdsdt, local_fadt->V1_dsdt);
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}
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if (!(local_fadt->xpm1a_evt_blk.address)) {
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acpi_tb_init_generic_address(&local_fadt->xpm1a_evt_blk,
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local_fadt->pm1_evt_len,
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(acpi_physical_address)
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local_fadt->V1_pm1a_evt_blk);
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}
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if (!(local_fadt->xpm1b_evt_blk.address)) {
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acpi_tb_init_generic_address(&local_fadt->xpm1b_evt_blk,
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local_fadt->pm1_evt_len,
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(acpi_physical_address)
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local_fadt->V1_pm1b_evt_blk);
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}
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if (!(local_fadt->xpm1a_cnt_blk.address)) {
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acpi_tb_init_generic_address(&local_fadt->xpm1a_cnt_blk,
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local_fadt->pm1_cnt_len,
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(acpi_physical_address)
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local_fadt->V1_pm1a_cnt_blk);
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}
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if (!(local_fadt->xpm1b_cnt_blk.address)) {
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acpi_tb_init_generic_address(&local_fadt->xpm1b_cnt_blk,
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local_fadt->pm1_cnt_len,
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(acpi_physical_address)
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local_fadt->V1_pm1b_cnt_blk);
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}
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if (!(local_fadt->xpm2_cnt_blk.address)) {
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acpi_tb_init_generic_address(&local_fadt->xpm2_cnt_blk,
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local_fadt->pm2_cnt_len,
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(acpi_physical_address)
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local_fadt->V1_pm2_cnt_blk);
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}
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if (!(local_fadt->xpm_tmr_blk.address)) {
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acpi_tb_init_generic_address(&local_fadt->xpm_tmr_blk,
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local_fadt->pm_tm_len,
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(acpi_physical_address)
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local_fadt->V1_pm_tmr_blk);
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}
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if (!(local_fadt->xgpe0_blk.address)) {
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acpi_tb_init_generic_address(&local_fadt->xgpe0_blk,
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0,
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(acpi_physical_address)
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local_fadt->V1_gpe0_blk);
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}
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if (!(local_fadt->xgpe1_blk.address)) {
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acpi_tb_init_generic_address(&local_fadt->xgpe1_blk,
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0,
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(acpi_physical_address)
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local_fadt->V1_gpe1_blk);
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}
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/* Create separate GAS structs for the PM1 Enable registers */
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acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
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(u8) ACPI_DIV_2(acpi_gbl_FADT->
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pm1_evt_len),
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(acpi_physical_address)
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(local_fadt->xpm1a_evt_blk.address +
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ACPI_DIV_2(acpi_gbl_FADT->pm1_evt_len)));
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acpi_gbl_xpm1a_enable.address_space_id =
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local_fadt->xpm1a_evt_blk.address_space_id;
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/* PM1B is optional; leave null if not present */
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if (local_fadt->xpm1b_evt_blk.address) {
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acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
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(u8) ACPI_DIV_2(acpi_gbl_FADT->
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pm1_evt_len),
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(acpi_physical_address)
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(local_fadt->xpm1b_evt_blk.
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address +
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ACPI_DIV_2(acpi_gbl_FADT->
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pm1_evt_len)));
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acpi_gbl_xpm1b_enable.address_space_id =
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local_fadt->xpm1b_evt_blk.address_space_id;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_convert_table_fadt
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local
|
|
* ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply
|
|
* copied to the local FADT. The ACPI CA software uses this
|
|
* local FADT. Thus a significant amount of special #ifdef
|
|
* type codeing is saved.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_tb_convert_table_fadt(void)
|
|
{
|
|
struct fadt_descriptor_rev2 *local_fadt;
|
|
struct acpi_table_desc *table_desc;
|
|
|
|
ACPI_FUNCTION_TRACE("tb_convert_table_fadt");
|
|
|
|
/*
|
|
* acpi_gbl_FADT is valid. Validate the FADT length. The table must be
|
|
* at least as long as the version 1.0 FADT
|
|
*/
|
|
if (acpi_gbl_FADT->length < sizeof(struct fadt_descriptor_rev1)) {
|
|
ACPI_REPORT_ERROR(("FADT is invalid, too short: 0x%X\n",
|
|
acpi_gbl_FADT->length));
|
|
return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
|
|
}
|
|
|
|
/* Allocate buffer for the ACPI 2.0(+) FADT */
|
|
|
|
local_fadt = ACPI_MEM_CALLOCATE(sizeof(struct fadt_descriptor_rev2));
|
|
if (!local_fadt) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
if (acpi_gbl_FADT->revision >= FADT2_REVISION_ID) {
|
|
if (acpi_gbl_FADT->length < sizeof(struct fadt_descriptor_rev2)) {
|
|
/* Length is too short to be a V2.0 table */
|
|
|
|
ACPI_REPORT_WARNING(("Inconsistent FADT length (0x%X) and revision (0x%X), using FADT V1.0 portion of table\n", acpi_gbl_FADT->length, acpi_gbl_FADT->revision));
|
|
|
|
acpi_tb_convert_fadt1(local_fadt,
|
|
(void *)acpi_gbl_FADT);
|
|
} else {
|
|
/* Valid V2.0 table */
|
|
|
|
acpi_tb_convert_fadt2(local_fadt, acpi_gbl_FADT);
|
|
}
|
|
} else {
|
|
/* Valid V1.0 table */
|
|
|
|
acpi_tb_convert_fadt1(local_fadt, (void *)acpi_gbl_FADT);
|
|
}
|
|
|
|
/* Global FADT pointer will point to the new common V2.0 FADT */
|
|
|
|
acpi_gbl_FADT = local_fadt;
|
|
acpi_gbl_FADT->length = sizeof(FADT_DESCRIPTOR);
|
|
|
|
/* Free the original table */
|
|
|
|
table_desc = acpi_gbl_table_lists[ACPI_TABLE_FADT].next;
|
|
acpi_tb_delete_single_table(table_desc);
|
|
|
|
/* Install the new table */
|
|
|
|
table_desc->pointer =
|
|
ACPI_CAST_PTR(struct acpi_table_header, acpi_gbl_FADT);
|
|
table_desc->allocation = ACPI_MEM_ALLOCATED;
|
|
table_desc->length = sizeof(struct fadt_descriptor_rev2);
|
|
|
|
/* Dump the entire FADT */
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
|
|
"Hex dump of common internal FADT, size %d (%X)\n",
|
|
acpi_gbl_FADT->length, acpi_gbl_FADT->length));
|
|
ACPI_DUMP_BUFFER((u8 *) (acpi_gbl_FADT), acpi_gbl_FADT->length);
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_build_common_facs
|
|
*
|
|
* PARAMETERS: table_info - Info for currently installed FACS
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Convert ACPI 1.0 and ACPI 2.0 FACS to a common internal
|
|
* table format.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_tb_build_common_facs(struct acpi_table_desc *table_info)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE("tb_build_common_facs");
|
|
|
|
/* Absolute minimum length is 24, but the ACPI spec says 64 */
|
|
|
|
if (acpi_gbl_FACS->length < 24) {
|
|
ACPI_REPORT_ERROR(("Invalid FACS table length: 0x%X\n",
|
|
acpi_gbl_FACS->length));
|
|
return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
|
|
}
|
|
|
|
if (acpi_gbl_FACS->length < 64) {
|
|
ACPI_REPORT_WARNING(("FACS is shorter than the ACPI specification allows: 0x%X, using anyway\n", acpi_gbl_FACS->length));
|
|
}
|
|
|
|
/* Copy fields to the new FACS */
|
|
|
|
acpi_gbl_common_fACS.global_lock = &(acpi_gbl_FACS->global_lock);
|
|
|
|
if ((acpi_gbl_RSDP->revision < 2) ||
|
|
(acpi_gbl_FACS->length < 32) ||
|
|
(!(acpi_gbl_FACS->xfirmware_waking_vector))) {
|
|
/* ACPI 1.0 FACS or short table or optional X_ field is zero */
|
|
|
|
acpi_gbl_common_fACS.firmware_waking_vector = ACPI_CAST_PTR(u64,
|
|
&
|
|
(acpi_gbl_FACS->
|
|
firmware_waking_vector));
|
|
acpi_gbl_common_fACS.vector_width = 32;
|
|
} else {
|
|
/* ACPI 2.0 FACS with valid X_ field */
|
|
|
|
acpi_gbl_common_fACS.firmware_waking_vector =
|
|
&acpi_gbl_FACS->xfirmware_waking_vector;
|
|
acpi_gbl_common_fACS.vector_width = 64;
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|