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1d82980c99
PM Timer is now optional. This support is already in Windows8 and "SHOULD" come out in ACPI 5.0A (if all goes well). The change doesn't affect Linux directly, because it does not rely on the presence of the PM timer. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
702 lines
22 KiB
C
702 lines
22 KiB
C
/******************************************************************************
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*
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* Module Name: tbfadt - FADT table utilities
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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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 "accommon.h"
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#include "actables.h"
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME("tbfadt")
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/* Local prototypes */
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static void
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acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
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u8 space_id,
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u8 byte_width, u64 address, char *register_name);
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static void acpi_tb_convert_fadt(void);
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static void acpi_tb_validate_fadt(void);
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static void acpi_tb_setup_fadt_registers(void);
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/* Table for conversion of FADT to common internal format and FADT validation */
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typedef struct acpi_fadt_info {
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char *name;
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u16 address64;
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u16 address32;
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u16 length;
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u8 default_length;
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u8 type;
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} acpi_fadt_info;
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#define ACPI_FADT_OPTIONAL 0
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#define ACPI_FADT_REQUIRED 1
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#define ACPI_FADT_SEPARATE_LENGTH 2
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static struct acpi_fadt_info fadt_info_table[] = {
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{"Pm1aEventBlock",
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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_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */
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ACPI_FADT_REQUIRED},
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{"Pm1bEventBlock",
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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_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */
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ACPI_FADT_OPTIONAL},
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{"Pm1aControlBlock",
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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_PM1_REGISTER_WIDTH,
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ACPI_FADT_REQUIRED},
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{"Pm1bControlBlock",
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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_PM1_REGISTER_WIDTH,
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ACPI_FADT_OPTIONAL},
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{"Pm2ControlBlock",
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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_PM2_REGISTER_WIDTH,
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ACPI_FADT_SEPARATE_LENGTH},
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{"PmTimerBlock",
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ACPI_FADT_OFFSET(xpm_timer_block),
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ACPI_FADT_OFFSET(pm_timer_block),
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ACPI_FADT_OFFSET(pm_timer_length),
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ACPI_PM_TIMER_WIDTH,
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ACPI_FADT_SEPARATE_LENGTH}, /* ACPI 5.0A: Timer is optional */
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{"Gpe0Block",
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ACPI_FADT_OFFSET(xgpe0_block),
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ACPI_FADT_OFFSET(gpe0_block),
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ACPI_FADT_OFFSET(gpe0_block_length),
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0,
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ACPI_FADT_SEPARATE_LENGTH},
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{"Gpe1Block",
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ACPI_FADT_OFFSET(xgpe1_block),
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ACPI_FADT_OFFSET(gpe1_block),
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ACPI_FADT_OFFSET(gpe1_block_length),
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0,
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ACPI_FADT_SEPARATE_LENGTH}
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};
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#define ACPI_FADT_INFO_ENTRIES \
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(sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info))
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/* Table used to split Event Blocks into separate status/enable registers */
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typedef struct acpi_fadt_pm_info {
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struct acpi_generic_address *target;
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u16 source;
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u8 register_num;
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} acpi_fadt_pm_info;
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static struct acpi_fadt_pm_info fadt_pm_info_table[] = {
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{&acpi_gbl_xpm1a_status,
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ACPI_FADT_OFFSET(xpm1a_event_block),
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0},
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{&acpi_gbl_xpm1a_enable,
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ACPI_FADT_OFFSET(xpm1a_event_block),
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1},
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{&acpi_gbl_xpm1b_status,
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ACPI_FADT_OFFSET(xpm1b_event_block),
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0},
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{&acpi_gbl_xpm1b_enable,
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ACPI_FADT_OFFSET(xpm1b_event_block),
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1}
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};
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#define ACPI_FADT_PM_INFO_ENTRIES \
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(sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info))
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_init_generic_address
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*
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* PARAMETERS: generic_address - GAS struct to be initialized
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* space_id - ACPI Space ID for this register
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* byte_width - Width of this register
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* address - Address of the register
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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize a Generic Address Structure (GAS)
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* See the ACPI specification for a full description and
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* definition of this structure.
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*
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******************************************************************************/
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static void
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acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
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u8 space_id,
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u8 byte_width, u64 address, char *register_name)
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{
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u8 bit_width;
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/* Bit width field in the GAS is only one byte long, 255 max */
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bit_width = (u8)(byte_width * 8);
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if (byte_width > 31) { /* (31*8)=248 */
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ACPI_ERROR((AE_INFO,
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"%s - 32-bit FADT register is too long (%u bytes, %u bits) "
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"to convert to GAS struct - 255 bits max, truncating",
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register_name, byte_width, (byte_width * 8)));
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bit_width = 255;
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}
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/*
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* The 64-bit Address field is non-aligned in the byte packed
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* GAS struct.
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*/
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ACPI_MOVE_64_TO_64(&generic_address->address, &address);
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/* All other fields are byte-wide */
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generic_address->space_id = space_id;
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generic_address->bit_width = bit_width;
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generic_address->bit_offset = 0;
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generic_address->access_width = 0; /* Access width ANY */
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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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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize the FADT, DSDT and FACS tables
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* (FADT contains the addresses of the DSDT and FACS)
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*
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******************************************************************************/
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void acpi_tb_parse_fadt(u32 table_index)
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{
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u32 length;
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struct acpi_table_header *table;
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/*
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* The FADT has multiple versions with different lengths,
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* and it contains pointers to both the DSDT and FACS tables.
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*
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* Get a local copy of the FADT and convert it to a common format
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* Map entire FADT, assumed to be smaller than one page.
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*/
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length = acpi_gbl_root_table_list.tables[table_index].length;
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table =
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acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index].
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address, length);
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if (!table) {
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return;
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}
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/*
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* Validate the FADT checksum before we copy the table. Ignore
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* checksum error as we want to try to get the DSDT and FACS.
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*/
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(void)acpi_tb_verify_checksum(table, length);
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/* Create a local copy of the FADT in common ACPI 2.0+ format */
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acpi_tb_create_local_fadt(table, length);
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/* All done with the real FADT, unmap it */
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acpi_os_unmap_memory(table, length);
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/* Obtain the DSDT and FACS tables via their addresses within the FADT */
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acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt,
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ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT);
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/* If Hardware Reduced flag is set, there is no FACS */
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if (!acpi_gbl_reduced_hardware) {
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acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.
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Xfacs, ACPI_SIG_FACS,
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ACPI_TABLE_INDEX_FACS);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_create_local_fadt
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*
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* PARAMETERS: table - Pointer to BIOS FADT
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* length - Length of the table
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*
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* RETURN: None
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*
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* DESCRIPTION: Get a local copy of the FADT and convert it to a common format.
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* Performs validation on some important FADT fields.
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*
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* NOTE: We create a local copy of the FADT regardless of the version.
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*
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******************************************************************************/
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void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length)
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{
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/*
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* Check if the FADT is larger than the largest table that we expect
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* (the ACPI 5.0 version). If so, truncate the table, and issue
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* a warning.
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*/
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if (length > sizeof(struct acpi_table_fadt)) {
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ACPI_BIOS_WARNING((AE_INFO,
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"FADT (revision %u) is longer than ACPI 5.0 version, "
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"truncating length %u to %u",
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table->revision, length,
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(u32)sizeof(struct acpi_table_fadt)));
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}
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/* Clear the entire local FADT */
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ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt));
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/* Copy the original FADT, up to sizeof (struct acpi_table_fadt) */
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ACPI_MEMCPY(&acpi_gbl_FADT, table,
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ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
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/* Take a copy of the Hardware Reduced flag */
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acpi_gbl_reduced_hardware = FALSE;
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if (acpi_gbl_FADT.flags & ACPI_FADT_HW_REDUCED) {
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acpi_gbl_reduced_hardware = TRUE;
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}
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/* Convert the local copy of the FADT to the common internal format */
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acpi_tb_convert_fadt();
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/* Validate FADT values now, before we make any changes */
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acpi_tb_validate_fadt();
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/* Initialize the global ACPI register structures */
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acpi_tb_setup_fadt_registers();
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_convert_fadt
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*
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* PARAMETERS: None, uses acpi_gbl_FADT
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*
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* RETURN: None
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*
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* DESCRIPTION: Converts all versions of the FADT to a common internal format.
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* Expand 32-bit addresses to 64-bit as necessary.
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*
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* NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt),
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* and must contain a copy of the actual FADT.
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*
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* Notes on 64-bit register addresses:
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*
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* After this FADT conversion, later ACPICA code will only use the 64-bit "X"
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* fields of the FADT for all ACPI register addresses.
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*
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* The 64-bit "X" fields are optional extensions to the original 32-bit FADT
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* V1.0 fields. Even if they are present in the FADT, they are optional and
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* are unused if the BIOS sets them to zero. Therefore, we must copy/expand
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* 32-bit V1.0 fields if the corresponding X field is zero.
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*
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* For ACPI 1.0 FADTs, all 32-bit address fields are expanded to the
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* corresponding "X" fields in the internal FADT.
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*
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* For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded
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* to the corresponding 64-bit X fields. For compatibility with other ACPI
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* implementations, we ignore the 64-bit field if the 32-bit field is valid,
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* regardless of whether the host OS is 32-bit or 64-bit.
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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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struct acpi_generic_address *address64;
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u32 address32;
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u32 i;
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/*
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* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary.
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* Later code will always use the X 64-bit field. Also, check for an
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* address mismatch between the 32-bit and 64-bit address fields
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* (FIRMWARE_CTRL/X_FIRMWARE_CTRL, DSDT/X_DSDT) which would indicate
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* the presence of two FACS or two DSDT tables.
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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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} else if (acpi_gbl_FADT.facs &&
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(acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) {
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ACPI_WARNING((AE_INFO,
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"32/64 FACS address mismatch in FADT - two FACS tables!"));
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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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} else if (acpi_gbl_FADT.dsdt &&
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(acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) {
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ACPI_WARNING((AE_INFO,
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"32/64 DSDT address mismatch in FADT - two DSDT tables!"));
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}
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/*
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* For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
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* should be zero are indeed zero. This will workaround BIOSs that
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* inadvertently place values in these fields.
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*
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* The ACPI 1.0 reserved fields that will be zeroed are the bytes located
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* at offset 45, 55, 95, and the word located at offset 109, 110.
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*
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* Note: The FADT revision value is unreliable. Only the length can be
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* trusted.
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*/
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if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) {
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acpi_gbl_FADT.preferred_profile = 0;
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acpi_gbl_FADT.pstate_control = 0;
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acpi_gbl_FADT.cst_control = 0;
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acpi_gbl_FADT.boot_flags = 0;
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}
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/* Update the local FADT table header length */
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acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
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/*
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* Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
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* generic address structures as necessary. Later code will always use
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* the 64-bit address structures.
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*
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* March 2009:
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* We now always use the 32-bit address if it is valid (non-null). This
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* is not in accordance with the ACPI specification which states that
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* the 64-bit address supersedes the 32-bit version, but we do this for
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* compatibility with other ACPI implementations. Most notably, in the
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* case where both the 32 and 64 versions are non-null, we use the 32-bit
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* version. This is the only address that is guaranteed to have been
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* tested by the BIOS manufacturer.
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*/
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for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
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address32 = *ACPI_ADD_PTR(u32,
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&acpi_gbl_FADT,
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fadt_info_table[i].address32);
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address64 = ACPI_ADD_PTR(struct acpi_generic_address,
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&acpi_gbl_FADT,
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fadt_info_table[i].address64);
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/*
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* If both 32- and 64-bit addresses are valid (non-zero),
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* they must match.
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*/
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if (address64->address && address32 &&
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(address64->address != (u64)address32)) {
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ACPI_BIOS_ERROR((AE_INFO,
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"32/64X address mismatch in FADT/%s: "
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"0x%8.8X/0x%8.8X%8.8X, using 32",
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fadt_info_table[i].name, address32,
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ACPI_FORMAT_UINT64(address64->
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address)));
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}
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/* Always use 32-bit address if it is valid (non-null) */
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if (address32) {
|
|
/*
|
|
* Copy the 32-bit address to the 64-bit GAS structure. The
|
|
* Space ID is always I/O for 32-bit legacy address fields
|
|
*/
|
|
acpi_tb_init_generic_address(address64,
|
|
ACPI_ADR_SPACE_SYSTEM_IO,
|
|
*ACPI_ADD_PTR(u8,
|
|
&acpi_gbl_FADT,
|
|
fadt_info_table
|
|
[i].length),
|
|
(u64) address32,
|
|
fadt_info_table[i].name);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_validate_fadt
|
|
*
|
|
* PARAMETERS: table - Pointer to the FADT to be validated
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Validate various important fields within the FADT. If a problem
|
|
* is found, issue a message, but no status is returned.
|
|
* Used by both the table manager and the disassembler.
|
|
*
|
|
* Possible additional checks:
|
|
* (acpi_gbl_FADT.pm1_event_length >= 4)
|
|
* (acpi_gbl_FADT.pm1_control_length >= 2)
|
|
* (acpi_gbl_FADT.pm_timer_length >= 4)
|
|
* Gpe block lengths must be multiple of 2
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void acpi_tb_validate_fadt(void)
|
|
{
|
|
char *name;
|
|
struct acpi_generic_address *address64;
|
|
u8 length;
|
|
u32 i;
|
|
|
|
/*
|
|
* Check for FACS and DSDT address mismatches. An address mismatch between
|
|
* the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and
|
|
* DSDT/X_DSDT) would indicate the presence of two FACS or two DSDT tables.
|
|
*/
|
|
if (acpi_gbl_FADT.facs &&
|
|
(acpi_gbl_FADT.Xfacs != (u64)acpi_gbl_FADT.facs)) {
|
|
ACPI_BIOS_WARNING((AE_INFO,
|
|
"32/64X FACS address mismatch in FADT - "
|
|
"0x%8.8X/0x%8.8X%8.8X, using 32",
|
|
acpi_gbl_FADT.facs,
|
|
ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xfacs)));
|
|
|
|
acpi_gbl_FADT.Xfacs = (u64)acpi_gbl_FADT.facs;
|
|
}
|
|
|
|
if (acpi_gbl_FADT.dsdt &&
|
|
(acpi_gbl_FADT.Xdsdt != (u64)acpi_gbl_FADT.dsdt)) {
|
|
ACPI_BIOS_WARNING((AE_INFO,
|
|
"32/64X DSDT address mismatch in FADT - "
|
|
"0x%8.8X/0x%8.8X%8.8X, using 32",
|
|
acpi_gbl_FADT.dsdt,
|
|
ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xdsdt)));
|
|
|
|
acpi_gbl_FADT.Xdsdt = (u64)acpi_gbl_FADT.dsdt;
|
|
}
|
|
|
|
/* If Hardware Reduced flag is set, we are all done */
|
|
|
|
if (acpi_gbl_reduced_hardware) {
|
|
return;
|
|
}
|
|
|
|
/* Examine all of the 64-bit extended address fields (X fields) */
|
|
|
|
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
|
|
/*
|
|
* Generate pointer to the 64-bit address, get the register
|
|
* length (width) and the register name
|
|
*/
|
|
address64 = ACPI_ADD_PTR(struct acpi_generic_address,
|
|
&acpi_gbl_FADT,
|
|
fadt_info_table[i].address64);
|
|
length =
|
|
*ACPI_ADD_PTR(u8, &acpi_gbl_FADT,
|
|
fadt_info_table[i].length);
|
|
name = fadt_info_table[i].name;
|
|
|
|
/*
|
|
* For each extended field, check for length mismatch between the
|
|
* legacy length field and the corresponding 64-bit X length field.
|
|
* Note: If the legacy length field is > 0xFF bits, ignore this
|
|
* check. (GPE registers can be larger than the 64-bit GAS structure
|
|
* can accomodate, 0xFF bits).
|
|
*/
|
|
if (address64->address &&
|
|
(ACPI_MUL_8(length) <= ACPI_UINT8_MAX) &&
|
|
(address64->bit_width != ACPI_MUL_8(length))) {
|
|
ACPI_BIOS_WARNING((AE_INFO,
|
|
"32/64X length mismatch in FADT/%s: %u/%u",
|
|
name, ACPI_MUL_8(length),
|
|
address64->bit_width));
|
|
}
|
|
|
|
if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) {
|
|
/*
|
|
* Field is required (Pm1a_event, Pm1a_control).
|
|
* Both the address and length must be non-zero.
|
|
*/
|
|
if (!address64->address || !length) {
|
|
ACPI_BIOS_ERROR((AE_INFO,
|
|
"Required FADT field %s has zero address and/or length: "
|
|
"0x%8.8X%8.8X/0x%X",
|
|
name,
|
|
ACPI_FORMAT_UINT64(address64->
|
|
address),
|
|
length));
|
|
}
|
|
} else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) {
|
|
/*
|
|
* Field is optional (Pm2_control, GPE0, GPE1) AND has its own
|
|
* length field. If present, both the address and length must
|
|
* be valid.
|
|
*/
|
|
if ((address64->address && !length) ||
|
|
(!address64->address && length)) {
|
|
ACPI_BIOS_WARNING((AE_INFO,
|
|
"Optional FADT field %s has zero address or length: "
|
|
"0x%8.8X%8.8X/0x%X",
|
|
name,
|
|
ACPI_FORMAT_UINT64
|
|
(address64->address),
|
|
length));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_setup_fadt_registers
|
|
*
|
|
* PARAMETERS: None, uses acpi_gbl_FADT.
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally,
|
|
* force FADT register definitions to their default lengths.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void acpi_tb_setup_fadt_registers(void)
|
|
{
|
|
struct acpi_generic_address *target64;
|
|
struct acpi_generic_address *source64;
|
|
u8 pm1_register_byte_width;
|
|
u32 i;
|
|
|
|
/*
|
|
* Optionally check all register lengths against the default values and
|
|
* update them if they are incorrect.
|
|
*/
|
|
if (acpi_gbl_use_default_register_widths) {
|
|
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
|
|
target64 =
|
|
ACPI_ADD_PTR(struct acpi_generic_address,
|
|
&acpi_gbl_FADT,
|
|
fadt_info_table[i].address64);
|
|
|
|
/*
|
|
* If a valid register (Address != 0) and the (default_length > 0)
|
|
* (Not a GPE register), then check the width against the default.
|
|
*/
|
|
if ((target64->address) &&
|
|
(fadt_info_table[i].default_length > 0) &&
|
|
(fadt_info_table[i].default_length !=
|
|
target64->bit_width)) {
|
|
ACPI_BIOS_WARNING((AE_INFO,
|
|
"Invalid length for FADT/%s: %u, using default %u",
|
|
fadt_info_table[i].name,
|
|
target64->bit_width,
|
|
fadt_info_table[i].
|
|
default_length));
|
|
|
|
/* Incorrect size, set width to the default */
|
|
|
|
target64->bit_width =
|
|
fadt_info_table[i].default_length;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get the length of the individual PM1 registers (enable and status).
|
|
* Each register is defined to be (event block length / 2). Extra divide
|
|
* by 8 converts bits to bytes.
|
|
*/
|
|
pm1_register_byte_width = (u8)
|
|
ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width);
|
|
|
|
/*
|
|
* Calculate separate GAS structs for the PM1x (A/B) Status and Enable
|
|
* registers. These addresses do not appear (directly) in the FADT, so it
|
|
* is useful to pre-calculate them from the PM1 Event Block definitions.
|
|
*
|
|
* The PM event blocks are split into two register blocks, first is the
|
|
* PM Status Register block, followed immediately by the PM Enable
|
|
* Register block. Each is of length (pm1_event_length/2)
|
|
*
|
|
* Note: The PM1A event block is required by the ACPI specification.
|
|
* However, the PM1B event block is optional and is rarely, if ever,
|
|
* used.
|
|
*/
|
|
|
|
for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) {
|
|
source64 =
|
|
ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
|
|
fadt_pm_info_table[i].source);
|
|
|
|
if (source64->address) {
|
|
acpi_tb_init_generic_address(fadt_pm_info_table[i].
|
|
target, source64->space_id,
|
|
pm1_register_byte_width,
|
|
source64->address +
|
|
(fadt_pm_info_table[i].
|
|
register_num *
|
|
pm1_register_byte_width),
|
|
"PmRegisters");
|
|
}
|
|
}
|
|
}
|