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f3d2e7865c
The Table Manager component has been completely redesigned and reimplemented. The new design is much simpler, and reduces the overall code and data size of the kernel-resident ACPICA by approximately 5%. Also, it is now possible to obtain the ACPI tables very early during kernel initialization, even before dynamic memory management is initialized. Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
555 lines
17 KiB
C
555 lines
17 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(struct acpi_table_fadt *fadt, u8 flags);
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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, acpi_physical_address address);
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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
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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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ACPI_INFO((AE_INFO,
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"%4.4s @ 0x%p Length 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, header->asl_compiler_revision));
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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, 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->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_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: Fadt - FADT table to be converted
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*
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* RETURN: None
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*
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* DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local
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* ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply
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* copied to the local FADT. The ACPI CA software uses this
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* local FADT. Thus a significant amount of special #ifdef
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* type codeing is saved.
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*
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******************************************************************************/
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void acpi_tb_convert_fadt(struct acpi_table_fadt *fadt)
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{
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/*
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* Convert table pointers to 64-bit fields
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*/
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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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* Convert the V1.0 block addresses to V2.0 GAS structures
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*/
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acpi_tb_init_generic_address(&acpi_gbl_FADT.xpm1a_event_block,
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acpi_gbl_FADT.pm1_event_length,
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(acpi_physical_address) acpi_gbl_FADT.
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pm1a_event_block);
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acpi_tb_init_generic_address(&acpi_gbl_FADT.xpm1b_event_block,
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acpi_gbl_FADT.pm1_event_length,
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(acpi_physical_address) acpi_gbl_FADT.
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pm1b_event_block);
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acpi_tb_init_generic_address(&acpi_gbl_FADT.xpm1a_control_block,
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acpi_gbl_FADT.pm1_control_length,
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(acpi_physical_address) acpi_gbl_FADT.
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pm1a_control_block);
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acpi_tb_init_generic_address(&acpi_gbl_FADT.xpm1b_control_block,
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acpi_gbl_FADT.pm1_control_length,
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(acpi_physical_address) acpi_gbl_FADT.
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pm1b_control_block);
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acpi_tb_init_generic_address(&acpi_gbl_FADT.xpm2_control_block,
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acpi_gbl_FADT.pm2_control_length,
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(acpi_physical_address) acpi_gbl_FADT.
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pm2_control_block);
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acpi_tb_init_generic_address(&acpi_gbl_FADT.xpm_timer_block,
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acpi_gbl_FADT.pm_timer_length,
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(acpi_physical_address) acpi_gbl_FADT.
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pm_timer_block);
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acpi_tb_init_generic_address(&acpi_gbl_FADT.xgpe0_block, 0,
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(acpi_physical_address) acpi_gbl_FADT.
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gpe0_block);
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acpi_tb_init_generic_address(&acpi_gbl_FADT.xgpe1_block, 0,
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(acpi_physical_address) acpi_gbl_FADT.
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gpe1_block);
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/*
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* Create separate GAS structs for the PM1 Enable registers
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*/
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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_event_length),
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(acpi_physical_address)
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(acpi_gbl_FADT.xpm1a_event_block.address +
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ACPI_DIV_2(acpi_gbl_FADT.
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pm1_event_length)));
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/*
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* PM1B is optional; leave null if not present
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*/
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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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(u8) ACPI_DIV_2(acpi_gbl_FADT.
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pm1_event_length),
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(acpi_physical_address)
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(acpi_gbl_FADT.xpm1b_event_block.
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address +
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ACPI_DIV_2(acpi_gbl_FADT.
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pm1_event_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_parse_fadt
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*
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* PARAMETERS: Fadt - Pointer to FADT table
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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: This function is called to initialise the FADT, DSDT and FACS
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* tables (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(struct acpi_table_fadt *fadt, u8 flags)
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{
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acpi_physical_address dsdt_address =
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(acpi_physical_address) fadt->Xdsdt;
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acpi_physical_address facs_address =
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(acpi_physical_address) fadt->Xfacs;
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struct acpi_table_header *table;
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if (!dsdt_address) {
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goto no_dsdt;
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}
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table =
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acpi_os_map_memory(dsdt_address, sizeof(struct acpi_table_header));
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if (!table) {
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goto no_dsdt;
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}
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/* Initialize the DSDT table */
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ACPI_MOVE_32_TO_32(&
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(acpi_gbl_root_table_list.
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tables[ACPI_TABLE_INDEX_DSDT].signature),
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ACPI_SIG_DSDT);
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acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].address =
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dsdt_address;
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acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].length =
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table->length;
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acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].flags = flags;
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acpi_tb_print_table_header(dsdt_address, table);
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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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acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
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no_dsdt:
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if (!facs_address) {
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return;
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}
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table =
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acpi_os_map_memory(facs_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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/* Initialize the FACS table */
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ACPI_MOVE_32_TO_32(&
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(acpi_gbl_root_table_list.
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tables[ACPI_TABLE_INDEX_FACS].signature),
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ACPI_SIG_FACS);
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acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_FACS].address =
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facs_address;
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acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_FACS].length =
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table->length;
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acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_FACS].flags = flags;
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ACPI_INFO((AE_INFO, "%4.4s @ 0x%p",
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table->signature, ACPI_CAST_PTR(void, facs_address)));
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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_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 acpi_tb_parse_root_table(struct acpi_table_rsdp *rsdp, u8 flags)
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{
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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_native_uint i;
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acpi_native_uint pointer_size;
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u32 table_count;
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u8 checksum;
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acpi_status status;
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ACPI_FUNCTION_TRACE(tb_parse_root_table);
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/* Differentiate between RSDT and XSDT root tables */
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if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
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/*
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* Root table is an XSDT (64-bit physical addresses). We must use the
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* XSDT if the revision is > 1 and the XSDT pointer is present, as per
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* the ACPI specification.
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*/
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address = (acpi_native_uint) rsdp->xsdt_physical_address;
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pointer_size = sizeof(u64);
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} else {
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/* Root table is an RSDT (32-bit physical addresses) */
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address = (acpi_native_uint) rsdp->rsdt_physical_address;
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pointer_size = sizeof(u32);
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}
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/* Map the table header to get the full table length */
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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 (AE_NO_MEMORY);
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}
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/* Get the length of the full table, verify length and map entire table */
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length = table->length;
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acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
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if (length < sizeof(struct acpi_table_header)) {
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ACPI_ERROR((AE_INFO, "Invalid length 0x%X in RSDT/XSDT",
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length));
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return (AE_INVALID_TABLE_LENGTH);
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}
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table = acpi_os_map_memory(address, length);
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if (!table) {
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return (AE_NO_MEMORY);
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}
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/* Validate the root table checksum */
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checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length);
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#if (ACPI_CHECKSUM_ABORT)
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if (checksum) {
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acpi_os_unmap_memory(table, length);
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return (AE_BAD_CHECKSUM);
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}
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#endif
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acpi_tb_print_table_header(address, table);
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/* Calculate the number of tables described in the root table */
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table_count =
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(table->length - sizeof(struct acpi_table_header)) / pointer_size;
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/* Setup loop */
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table_entry =
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ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header);
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acpi_gbl_root_table_list.count = 2;
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/*
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* Initialize the ACPI table entries
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* First two entries in the table array are reserved for the DSDT and FACS
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*/
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for (i = 0; i < table_count; ++i, table_entry += pointer_size) {
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/* Ensure there is room for another table entry */
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if (acpi_gbl_root_table_list.count >=
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acpi_gbl_root_table_list.size) {
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status = acpi_tb_resize_root_table_list();
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if (ACPI_FAILURE(status)) {
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ACPI_WARNING((AE_INFO,
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"Truncating %u table entries!",
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(unsigned)
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(acpi_gbl_root_table_list.size -
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acpi_gbl_root_table_list.
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count)));
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break;
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}
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}
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/* Get the physical address (32-bit for RSDT, 64-bit for XSDT) */
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if (pointer_size == sizeof(u32)) {
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acpi_gbl_root_table_list.
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tables[acpi_gbl_root_table_list.count].address =
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(acpi_physical_address) (*ACPI_CAST_PTR
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(u32, table_entry));
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} else {
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acpi_gbl_root_table_list.
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tables[acpi_gbl_root_table_list.count].address =
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(acpi_physical_address) (*ACPI_CAST_PTR
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(u64, table_entry));
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}
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acpi_gbl_root_table_list.count++;
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}
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/*
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* It is not possible to map more than one entry in some environments,
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* so unmap the root table here before mapping other tables
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*/
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acpi_os_unmap_memory(table, length);
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/* Initialize all tables other than the DSDT and FACS */
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for (i = 2; i < acpi_gbl_root_table_list.count; i++) {
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address = acpi_gbl_root_table_list.tables[i].address;
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length = sizeof(struct acpi_table_header);
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table = acpi_os_map_memory(address, length);
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if (!table) {
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continue;
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}
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acpi_gbl_root_table_list.tables[i].length = table->length;
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acpi_gbl_root_table_list.tables[i].flags = flags;
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ACPI_MOVE_32_TO_32(&
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(acpi_gbl_root_table_list.tables[i].
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signature), table->signature);
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acpi_tb_print_table_header(address, table);
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/*
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* Special case for the FADT because of multiple versions -
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* get a local copy and convert to common format
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*/
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if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_FADT)) {
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acpi_os_unmap_memory(table, length);
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length = table->length;
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table = acpi_os_map_memory(address, length);
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if (!table) {
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continue;
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}
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|
|
/* Copy the entire FADT locally */
|
|
|
|
ACPI_MEMCPY(&acpi_gbl_FADT, table,
|
|
ACPI_MIN(table->length,
|
|
sizeof(struct acpi_table_fadt)));
|
|
|
|
/* Small table means old revision, convert to new */
|
|
|
|
if (table->length < sizeof(struct acpi_table_fadt)) {
|
|
acpi_tb_convert_fadt(ACPI_CAST_PTR
|
|
(struct acpi_table_fadt,
|
|
table));
|
|
}
|
|
|
|
/* Unmap original FADT */
|
|
|
|
acpi_os_unmap_memory(table, length);
|
|
acpi_tb_parse_fadt(&acpi_gbl_FADT, flags);
|
|
} else {
|
|
acpi_os_unmap_memory(table, length);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|