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790 lines
26 KiB
C
790 lines
26 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 - 2022, 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 MERCHANTABILITY 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.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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AcpiTbInitGenericAddress (
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ACPI_GENERIC_ADDRESS *GenericAddress,
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UINT8 SpaceId,
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UINT8 ByteWidth,
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UINT64 Address,
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const char *RegisterName,
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UINT8 Flags);
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static void
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AcpiTbConvertFadt (
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void);
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static void
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AcpiTbSetupFadtRegisters (
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void);
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static UINT64
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AcpiTbSelectAddress (
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char *RegisterName,
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UINT32 Address32,
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UINT64 Address64);
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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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{
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const char *Name;
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UINT16 Address64;
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UINT16 Address32;
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UINT16 Length;
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UINT8 DefaultLength;
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UINT8 Flags;
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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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#define ACPI_FADT_GPE_REGISTER 4
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static ACPI_FADT_INFO FadtInfoTable[] =
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{
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{"Pm1aEventBlock",
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ACPI_FADT_OFFSET (XPm1aEventBlock),
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ACPI_FADT_OFFSET (Pm1aEventBlock),
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ACPI_FADT_OFFSET (Pm1EventLength),
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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 (XPm1bEventBlock),
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ACPI_FADT_OFFSET (Pm1bEventBlock),
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ACPI_FADT_OFFSET (Pm1EventLength),
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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 (XPm1aControlBlock),
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ACPI_FADT_OFFSET (Pm1aControlBlock),
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ACPI_FADT_OFFSET (Pm1ControlLength),
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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 (XPm1bControlBlock),
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ACPI_FADT_OFFSET (Pm1bControlBlock),
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ACPI_FADT_OFFSET (Pm1ControlLength),
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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 (XPm2ControlBlock),
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ACPI_FADT_OFFSET (Pm2ControlBlock),
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ACPI_FADT_OFFSET (Pm2ControlLength),
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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 (XPmTimerBlock),
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ACPI_FADT_OFFSET (PmTimerBlock),
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ACPI_FADT_OFFSET (PmTimerLength),
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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 (XGpe0Block),
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ACPI_FADT_OFFSET (Gpe0Block),
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ACPI_FADT_OFFSET (Gpe0BlockLength),
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0,
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ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER},
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{"Gpe1Block",
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ACPI_FADT_OFFSET (XGpe1Block),
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ACPI_FADT_OFFSET (Gpe1Block),
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ACPI_FADT_OFFSET (Gpe1BlockLength),
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0,
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ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER}
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};
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#define ACPI_FADT_INFO_ENTRIES \
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(sizeof (FadtInfoTable) / sizeof (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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{
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ACPI_GENERIC_ADDRESS *Target;
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UINT16 Source;
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UINT8 RegisterNum;
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} ACPI_FADT_PM_INFO;
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static ACPI_FADT_PM_INFO FadtPmInfoTable[] =
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{
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{&AcpiGbl_XPm1aStatus,
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ACPI_FADT_OFFSET (XPm1aEventBlock),
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0},
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{&AcpiGbl_XPm1aEnable,
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ACPI_FADT_OFFSET (XPm1aEventBlock),
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1},
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{&AcpiGbl_XPm1bStatus,
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ACPI_FADT_OFFSET (XPm1bEventBlock),
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0},
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{&AcpiGbl_XPm1bEnable,
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ACPI_FADT_OFFSET (XPm1bEventBlock),
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1}
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};
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#define ACPI_FADT_PM_INFO_ENTRIES \
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(sizeof (FadtPmInfoTable) / sizeof (ACPI_FADT_PM_INFO))
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbInitGenericAddress
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*
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* PARAMETERS: GenericAddress - GAS struct to be initialized
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* SpaceId - ACPI Space ID for this register
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* ByteWidth - Width of this register
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* Address - Address of the register
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* RegisterName - ASCII name of the ACPI 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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AcpiTbInitGenericAddress (
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ACPI_GENERIC_ADDRESS *GenericAddress,
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UINT8 SpaceId,
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UINT8 ByteWidth,
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UINT64 Address,
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const char *RegisterName,
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UINT8 Flags)
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{
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UINT8 BitWidth;
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/*
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* Bit width field in the GAS is only one byte long, 255 max.
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* Check for BitWidth overflow in GAS.
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*/
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BitWidth = (UINT8) (ByteWidth * 8);
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if (ByteWidth > 31) /* (31*8)=248, (32*8)=256 */
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{
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/*
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* No error for GPE blocks, because we do not use the BitWidth
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* for GPEs, the legacy length (ByteWidth) is used instead to
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* allow for a large number of GPEs.
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*/
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if (!(Flags & ACPI_FADT_GPE_REGISTER))
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{
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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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RegisterName, ByteWidth, (ByteWidth * 8)));
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}
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BitWidth = 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 (&GenericAddress->Address, &Address);
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/* All other fields are byte-wide */
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GenericAddress->SpaceId = SpaceId;
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GenericAddress->BitWidth = BitWidth;
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GenericAddress->BitOffset = 0;
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GenericAddress->AccessWidth = 0; /* Access width ANY */
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbSelectAddress
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*
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* PARAMETERS: RegisterName - ASCII name of the ACPI register
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* Address32 - 32-bit address of the register
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* Address64 - 64-bit address of the register
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*
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* RETURN: The resolved 64-bit address
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*
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* DESCRIPTION: Select between 32-bit and 64-bit versions of addresses within
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* the FADT. Used for the FACS and DSDT addresses.
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*
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* NOTES:
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*
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* Check for FACS and DSDT address mismatches. An address mismatch between
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* the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and
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* DSDT/X_DSDT) could be a corrupted address field or it might indicate
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* the presence of two FACS or two DSDT tables.
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*
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* November 2013:
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* By default, as per the ACPICA specification, a valid 64-bit address is
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* used regardless of the value of the 32-bit address. However, this
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* behavior can be overridden via the AcpiGbl_Use32BitFadtAddresses flag.
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*
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******************************************************************************/
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static UINT64
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AcpiTbSelectAddress (
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char *RegisterName,
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UINT32 Address32,
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UINT64 Address64)
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{
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if (!Address64)
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{
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/* 64-bit address is zero, use 32-bit address */
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return ((UINT64) Address32);
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}
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if (Address32 &&
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(Address64 != (UINT64) Address32))
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{
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/* Address mismatch between 32-bit and 64-bit versions */
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ACPI_BIOS_WARNING ((AE_INFO,
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"32/64X %s address mismatch in FADT: "
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"0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
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RegisterName, Address32, ACPI_FORMAT_UINT64 (Address64),
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AcpiGbl_Use32BitFadtAddresses ? 32 : 64));
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/* 32-bit address override */
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if (AcpiGbl_Use32BitFadtAddresses)
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{
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return ((UINT64) Address32);
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}
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}
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/* Default is to use the 64-bit address */
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return (Address64);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbParseFadt
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*
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* PARAMETERS: None
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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
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AcpiTbParseFadt (
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void)
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{
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UINT32 Length;
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ACPI_TABLE_HEADER *Table;
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ACPI_TABLE_DESC *FadtDesc;
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ACPI_STATUS Status;
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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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FadtDesc = &AcpiGbl_RootTableList.Tables[AcpiGbl_FadtIndex];
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Status = AcpiTbGetTable (FadtDesc, &Table);
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if (ACPI_FAILURE (Status))
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{
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return;
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}
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Length = FadtDesc->Length;
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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) AcpiUtVerifyChecksum (Table, Length);
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/* Create a local copy of the FADT in common ACPI 2.0+ format */
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AcpiTbCreateLocalFadt (Table, Length);
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/* All done with the real FADT, unmap it */
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AcpiTbPutTable (FadtDesc);
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/* Obtain the DSDT and FACS tables via their addresses within the FADT */
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AcpiTbInstallStandardTable (
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(ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XDsdt,
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ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, TRUE,
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&AcpiGbl_DsdtIndex);
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/* If Hardware Reduced flag is set, there is no FACS */
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if (!AcpiGbl_ReducedHardware)
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{
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if (AcpiGbl_FADT.Facs)
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{
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AcpiTbInstallStandardTable (
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(ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.Facs,
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ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, TRUE,
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&AcpiGbl_FacsIndex);
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}
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if (AcpiGbl_FADT.XFacs)
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{
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AcpiTbInstallStandardTable (
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(ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XFacs,
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ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, TRUE,
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&AcpiGbl_XFacsIndex);
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbCreateLocalFadt
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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
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AcpiTbCreateLocalFadt (
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ACPI_TABLE_HEADER *Table,
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UINT32 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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* (typically the current ACPI specification version). If so, truncate
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* the table, and issue a warning.
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*/
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if (Length > sizeof (ACPI_TABLE_FADT))
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{
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ACPI_BIOS_WARNING ((AE_INFO,
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"FADT (revision %u) is longer than %s length, "
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"truncating length %u to %u",
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Table->Revision, ACPI_FADT_CONFORMANCE, Length,
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(UINT32) sizeof (ACPI_TABLE_FADT)));
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}
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/* Clear the entire local FADT */
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memset (&AcpiGbl_FADT, 0, sizeof (ACPI_TABLE_FADT));
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/* Copy the original FADT, up to sizeof (ACPI_TABLE_FADT) */
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memcpy (&AcpiGbl_FADT, Table,
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ACPI_MIN (Length, sizeof (ACPI_TABLE_FADT)));
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/* Take a copy of the Hardware Reduced flag */
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AcpiGbl_ReducedHardware = FALSE;
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if (AcpiGbl_FADT.Flags & ACPI_FADT_HW_REDUCED)
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{
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AcpiGbl_ReducedHardware = 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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AcpiTbConvertFadt ();
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/* Initialize the global ACPI register structures */
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AcpiTbSetupFadtRegisters ();
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiTbConvertFadt
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*
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* PARAMETERS: None - AcpiGbl_FADT is used.
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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. Also validate
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* important fields within the FADT.
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*
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* NOTE: AcpiGbl_FADT must be of size (ACPI_TABLE_FADT), and must
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* contain a copy of the actual BIOS-provided 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 to the 64-bit X fields if the 64-bit X field is originally
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* zero.
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*
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* For ACPI 1.0 FADTs (that contain no 64-bit addresses), all 32-bit address
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* fields are expanded to the corresponding 64-bit X fields in the internal
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* common 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, if the 64-bit field is originally
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* zero. Adhering to the ACPI specification, we completely ignore the 32-bit
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* field if the 64-bit field is valid, regardless of whether the host OS is
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* 32-bit or 64-bit.
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*
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* Possible additional checks:
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* (AcpiGbl_FADT.Pm1EventLength >= 4)
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* (AcpiGbl_FADT.Pm1ControlLength >= 2)
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* (AcpiGbl_FADT.PmTimerLength >= 4)
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* Gpe block lengths must be multiple of 2
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*
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******************************************************************************/
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static void
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AcpiTbConvertFadt (
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void)
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{
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const char *Name;
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ACPI_GENERIC_ADDRESS *Address64;
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UINT32 Address32;
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UINT8 Length;
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UINT8 Flags;
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UINT32 i;
|
|
|
|
|
|
/*
|
|
* For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
|
|
* should be zero are indeed zero. This will workaround BIOSs that
|
|
* inadvertently place values in these fields.
|
|
*
|
|
* The ACPI 1.0 reserved fields that will be zeroed are the bytes located
|
|
* at offset 45, 55, 95, and the word located at offset 109, 110.
|
|
*
|
|
* Note: The FADT revision value is unreliable. Only the length can be
|
|
* trusted.
|
|
*/
|
|
if (AcpiGbl_FADT.Header.Length <= ACPI_FADT_V2_SIZE)
|
|
{
|
|
AcpiGbl_FADT.PreferredProfile = 0;
|
|
AcpiGbl_FADT.PstateControl = 0;
|
|
AcpiGbl_FADT.CstControl = 0;
|
|
AcpiGbl_FADT.BootFlags = 0;
|
|
}
|
|
|
|
/*
|
|
* Now we can update the local FADT length to the length of the
|
|
* current FADT version as defined by the ACPI specification.
|
|
* Thus, we will have a common FADT internally.
|
|
*/
|
|
AcpiGbl_FADT.Header.Length = sizeof (ACPI_TABLE_FADT);
|
|
|
|
/*
|
|
* Expand the 32-bit DSDT addresses to 64-bit as necessary.
|
|
* Later ACPICA code will always use the X 64-bit field.
|
|
*/
|
|
AcpiGbl_FADT.XDsdt = AcpiTbSelectAddress ("DSDT",
|
|
AcpiGbl_FADT.Dsdt, AcpiGbl_FADT.XDsdt);
|
|
|
|
/* If Hardware Reduced flag is set, we are all done */
|
|
|
|
if (AcpiGbl_ReducedHardware)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/* Examine all of the 64-bit extended address fields (X fields) */
|
|
|
|
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++)
|
|
{
|
|
/*
|
|
* Get the 32-bit and 64-bit addresses, as well as the register
|
|
* length and register name.
|
|
*/
|
|
Address32 = *ACPI_ADD_PTR (UINT32,
|
|
&AcpiGbl_FADT, FadtInfoTable[i].Address32);
|
|
|
|
Address64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS,
|
|
&AcpiGbl_FADT, FadtInfoTable[i].Address64);
|
|
|
|
Length = *ACPI_ADD_PTR (UINT8,
|
|
&AcpiGbl_FADT, FadtInfoTable[i].Length);
|
|
|
|
Name = FadtInfoTable[i].Name;
|
|
Flags = FadtInfoTable[i].Flags;
|
|
|
|
/*
|
|
* Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
|
|
* generic address structures as necessary. Later code will always use
|
|
* the 64-bit address structures.
|
|
*
|
|
* November 2013:
|
|
* Now always use the 64-bit address if it is valid (non-zero), in
|
|
* accordance with the ACPI specification which states that a 64-bit
|
|
* address supersedes the 32-bit version. This behavior can be
|
|
* overridden by the AcpiGbl_Use32BitFadtAddresses flag.
|
|
*
|
|
* During 64-bit address construction and verification,
|
|
* these cases are handled:
|
|
*
|
|
* Address32 zero, Address64 [don't care] - Use Address64
|
|
*
|
|
* No override: if AcpiGbl_Use32BitFadtAddresses is FALSE, and:
|
|
* Address32 non-zero, Address64 zero - Copy/use Address32
|
|
* Address32 non-zero == Address64 non-zero - Use Address64
|
|
* Address32 non-zero != Address64 non-zero - Warning, use Address64
|
|
*
|
|
* Override: if AcpiGbl_Use32BitFadtAddresses is TRUE, and:
|
|
* Address32 non-zero, Address64 zero - Copy/use Address32
|
|
* Address32 non-zero == Address64 non-zero - Copy/use Address32
|
|
* Address32 non-zero != Address64 non-zero - Warning, copy/use Address32
|
|
*
|
|
* Note: SpaceId is always I/O for 32-bit legacy address fields
|
|
*/
|
|
if (Address32)
|
|
{
|
|
if (Address64->Address)
|
|
{
|
|
if (Address64->Address != (UINT64) Address32)
|
|
{
|
|
/* Address mismatch */
|
|
|
|
ACPI_BIOS_WARNING ((AE_INFO,
|
|
"32/64X address mismatch in FADT/%s: "
|
|
"0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
|
|
Name, Address32,
|
|
ACPI_FORMAT_UINT64 (Address64->Address),
|
|
AcpiGbl_Use32BitFadtAddresses ? 32 : 64));
|
|
}
|
|
|
|
/*
|
|
* 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 accommodate, 0xFF bits).
|
|
*/
|
|
if ((ACPI_MUL_8 (Length) <= ACPI_UINT8_MAX) &&
|
|
(Address64->BitWidth != ACPI_MUL_8 (Length)))
|
|
{
|
|
ACPI_BIOS_WARNING ((AE_INFO,
|
|
"32/64X length mismatch in FADT/%s: %u/%u",
|
|
Name, ACPI_MUL_8 (Length), Address64->BitWidth));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Hardware register access code always uses the 64-bit fields.
|
|
* So if the 64-bit field is zero or is to be overridden,
|
|
* initialize it with the 32-bit fields.
|
|
* Note that when the 32-bit address favor is specified, the
|
|
* 64-bit fields are always re-initialized so that
|
|
* AccessSize/BitWidth/BitOffset fields can be correctly
|
|
* configured to the values to trigger a 32-bit compatible
|
|
* access mode in the hardware register access code.
|
|
*/
|
|
if (!Address64->Address || AcpiGbl_Use32BitFadtAddresses)
|
|
{
|
|
AcpiTbInitGenericAddress (Address64,
|
|
ACPI_ADR_SPACE_SYSTEM_IO, Length,
|
|
(UINT64) Address32, Name, Flags);
|
|
}
|
|
}
|
|
|
|
if (FadtInfoTable[i].Flags & ACPI_FADT_REQUIRED)
|
|
{
|
|
/*
|
|
* Field is required (PM1aEvent, PM1aControl).
|
|
* 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 (FadtInfoTable[i].Flags & ACPI_FADT_SEPARATE_LENGTH)
|
|
{
|
|
/*
|
|
* Field is optional (PM2Control, 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 valid %s but zero %s: "
|
|
"0x%8.8X%8.8X/0x%X", Name,
|
|
(Length ? "Length" : "Address"),
|
|
(Length ? "Address": "Length"),
|
|
ACPI_FORMAT_UINT64 (Address64->Address), Length));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiTbSetupFadtRegisters
|
|
*
|
|
* PARAMETERS: None, uses AcpiGbl_FADT.
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally,
|
|
* force FADT register definitions to their default lengths.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void
|
|
AcpiTbSetupFadtRegisters (
|
|
void)
|
|
{
|
|
ACPI_GENERIC_ADDRESS *Target64;
|
|
ACPI_GENERIC_ADDRESS *Source64;
|
|
UINT8 Pm1RegisterByteWidth;
|
|
UINT32 i;
|
|
|
|
|
|
/*
|
|
* Optionally check all register lengths against the default values and
|
|
* update them if they are incorrect.
|
|
*/
|
|
if (AcpiGbl_UseDefaultRegisterWidths)
|
|
{
|
|
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++)
|
|
{
|
|
Target64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS, &AcpiGbl_FADT,
|
|
FadtInfoTable[i].Address64);
|
|
|
|
/*
|
|
* If a valid register (Address != 0) and the (DefaultLength > 0)
|
|
* (Not a GPE register), then check the width against the default.
|
|
*/
|
|
if ((Target64->Address) &&
|
|
(FadtInfoTable[i].DefaultLength > 0) &&
|
|
(FadtInfoTable[i].DefaultLength != Target64->BitWidth))
|
|
{
|
|
ACPI_BIOS_WARNING ((AE_INFO,
|
|
"Invalid length for FADT/%s: %u, using default %u",
|
|
FadtInfoTable[i].Name, Target64->BitWidth,
|
|
FadtInfoTable[i].DefaultLength));
|
|
|
|
/* Incorrect size, set width to the default */
|
|
|
|
Target64->BitWidth = FadtInfoTable[i].DefaultLength;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
Pm1RegisterByteWidth = (UINT8)
|
|
ACPI_DIV_16 (AcpiGbl_FADT.XPm1aEventBlock.BitWidth);
|
|
|
|
/*
|
|
* 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 (Pm1EventLength/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 (ACPI_GENERIC_ADDRESS, &AcpiGbl_FADT,
|
|
FadtPmInfoTable[i].Source);
|
|
|
|
if (Source64->Address)
|
|
{
|
|
AcpiTbInitGenericAddress (FadtPmInfoTable[i].Target,
|
|
Source64->SpaceId, Pm1RegisterByteWidth,
|
|
Source64->Address +
|
|
(FadtPmInfoTable[i].RegisterNum * Pm1RegisterByteWidth),
|
|
"PmRegisters", 0);
|
|
}
|
|
}
|
|
}
|