455 lines
13 KiB
C
455 lines
13 KiB
C
/*******************************************************************************
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*
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* Module Name: utmisc - common utility procedures
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, 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.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME ("utmisc")
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtIsPciRootBridge
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*
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* PARAMETERS: Id - The HID/CID in string format
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*
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* RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
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*
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* DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
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*
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******************************************************************************/
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BOOLEAN
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AcpiUtIsPciRootBridge (
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char *Id)
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{
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/*
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* Check if this is a PCI root bridge.
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* ACPI 3.0+: check for a PCI Express root also.
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*/
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if (!(ACPI_STRCMP (Id,
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PCI_ROOT_HID_STRING)) ||
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!(ACPI_STRCMP (Id,
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PCI_EXPRESS_ROOT_HID_STRING)))
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{
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return (TRUE);
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtIsAmlTable
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*
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* PARAMETERS: Table - An ACPI table
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*
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* RETURN: TRUE if table contains executable AML; FALSE otherwise
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*
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* DESCRIPTION: Check ACPI Signature for a table that contains AML code.
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* Currently, these are DSDT,SSDT,PSDT. All other table types are
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* data tables that do not contain AML code.
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*
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******************************************************************************/
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BOOLEAN
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AcpiUtIsAmlTable (
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ACPI_TABLE_HEADER *Table)
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{
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/* These are the only tables that contain executable AML */
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if (ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) ||
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ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_PSDT) ||
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ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT))
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{
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return (TRUE);
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtDwordByteSwap
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*
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* PARAMETERS: Value - Value to be converted
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*
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* RETURN: UINT32 integer with bytes swapped
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*
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* DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
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*
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******************************************************************************/
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UINT32
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AcpiUtDwordByteSwap (
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UINT32 Value)
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{
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union
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{
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UINT32 Value;
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UINT8 Bytes[4];
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} Out;
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union
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{
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UINT32 Value;
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UINT8 Bytes[4];
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} In;
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ACPI_FUNCTION_ENTRY ();
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In.Value = Value;
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Out.Bytes[0] = In.Bytes[3];
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Out.Bytes[1] = In.Bytes[2];
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Out.Bytes[2] = In.Bytes[1];
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Out.Bytes[3] = In.Bytes[0];
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return (Out.Value);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtSetIntegerWidth
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*
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* PARAMETERS: Revision From DSDT header
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*
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* RETURN: None
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*
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* DESCRIPTION: Set the global integer bit width based upon the revision
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* of the DSDT. For Revision 1 and 0, Integers are 32 bits.
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* For Revision 2 and above, Integers are 64 bits. Yes, this
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* makes a difference.
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*
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******************************************************************************/
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void
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AcpiUtSetIntegerWidth (
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UINT8 Revision)
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{
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if (Revision < 2)
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{
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/* 32-bit case */
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AcpiGbl_IntegerBitWidth = 32;
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AcpiGbl_IntegerNybbleWidth = 8;
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AcpiGbl_IntegerByteWidth = 4;
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}
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else
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{
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/* 64-bit case (ACPI 2.0+) */
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AcpiGbl_IntegerBitWidth = 64;
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AcpiGbl_IntegerNybbleWidth = 16;
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AcpiGbl_IntegerByteWidth = 8;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtCreateUpdateStateAndPush
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*
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* PARAMETERS: Object - Object to be added to the new state
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* Action - Increment/Decrement
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* StateList - List the state will be added to
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new state and push it
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiUtCreateUpdateStateAndPush (
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ACPI_OPERAND_OBJECT *Object,
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UINT16 Action,
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ACPI_GENERIC_STATE **StateList)
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{
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ACPI_GENERIC_STATE *State;
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ACPI_FUNCTION_ENTRY ();
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/* Ignore null objects; these are expected */
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if (!Object)
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{
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return (AE_OK);
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}
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State = AcpiUtCreateUpdateState (Object, Action);
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if (!State)
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{
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return (AE_NO_MEMORY);
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}
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AcpiUtPushGenericState (StateList, State);
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtWalkPackageTree
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*
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* PARAMETERS: SourceObject - The package to walk
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* TargetObject - Target object (if package is being copied)
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* WalkCallback - Called once for each package element
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* Context - Passed to the callback function
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk through a package
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiUtWalkPackageTree (
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ACPI_OPERAND_OBJECT *SourceObject,
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void *TargetObject,
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ACPI_PKG_CALLBACK WalkCallback,
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void *Context)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_GENERIC_STATE *StateList = NULL;
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ACPI_GENERIC_STATE *State;
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UINT32 ThisIndex;
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ACPI_OPERAND_OBJECT *ThisSourceObj;
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ACPI_FUNCTION_TRACE (UtWalkPackageTree);
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State = AcpiUtCreatePkgState (SourceObject, TargetObject, 0);
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if (!State)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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while (State)
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{
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/* Get one element of the package */
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ThisIndex = State->Pkg.Index;
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ThisSourceObj = (ACPI_OPERAND_OBJECT *)
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State->Pkg.SourceObject->Package.Elements[ThisIndex];
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/*
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* Check for:
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* 1) An uninitialized package element. It is completely
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* legal to declare a package and leave it uninitialized
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* 2) Not an internal object - can be a namespace node instead
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* 3) Any type other than a package. Packages are handled in else
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* case below.
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*/
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if ((!ThisSourceObj) ||
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(ACPI_GET_DESCRIPTOR_TYPE (ThisSourceObj) != ACPI_DESC_TYPE_OPERAND) ||
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(ThisSourceObj->Common.Type != ACPI_TYPE_PACKAGE))
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{
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Status = WalkCallback (ACPI_COPY_TYPE_SIMPLE, ThisSourceObj,
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State, Context);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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State->Pkg.Index++;
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while (State->Pkg.Index >= State->Pkg.SourceObject->Package.Count)
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{
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/*
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* We've handled all of the objects at this level, This means
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* that we have just completed a package. That package may
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* have contained one or more packages itself.
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*
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* Delete this state and pop the previous state (package).
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*/
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AcpiUtDeleteGenericState (State);
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State = AcpiUtPopGenericState (&StateList);
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/* Finished when there are no more states */
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if (!State)
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{
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/*
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* We have handled all of the objects in the top level
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* package just add the length of the package objects
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* and exit
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*/
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Go back up a level and move the index past the just
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* completed package object.
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*/
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State->Pkg.Index++;
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}
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}
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else
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{
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/* This is a subobject of type package */
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Status = WalkCallback (ACPI_COPY_TYPE_PACKAGE, ThisSourceObj,
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State, Context);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/*
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* Push the current state and create a new one
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* The callback above returned a new target package object.
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*/
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AcpiUtPushGenericState (&StateList, State);
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State = AcpiUtCreatePkgState (ThisSourceObj,
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State->Pkg.ThisTargetObj, 0);
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if (!State)
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{
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/* Free any stacked Update State objects */
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while (StateList)
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{
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State = AcpiUtPopGenericState (&StateList);
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AcpiUtDeleteGenericState (State);
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}
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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}
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}
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/* We should never get here */
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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#ifdef ACPI_DEBUG_OUTPUT
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtDisplayInitPathname
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*
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* PARAMETERS: Type - Object type of the node
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* ObjHandle - Handle whose pathname will be displayed
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* Path - Additional path string to be appended.
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* (NULL if no extra path)
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*
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* RETURN: ACPI_STATUS
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*
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* DESCRIPTION: Display full pathname of an object, DEBUG ONLY
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*
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******************************************************************************/
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void
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AcpiUtDisplayInitPathname (
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UINT8 Type,
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ACPI_NAMESPACE_NODE *ObjHandle,
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char *Path)
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{
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ACPI_STATUS Status;
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ACPI_BUFFER Buffer;
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ACPI_FUNCTION_ENTRY ();
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/* Only print the path if the appropriate debug level is enabled */
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if (!(AcpiDbgLevel & ACPI_LV_INIT_NAMES))
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{
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return;
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}
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/* Get the full pathname to the node */
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Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
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Status = AcpiNsHandleToPathname (ObjHandle, &Buffer);
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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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/* Print what we're doing */
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switch (Type)
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{
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case ACPI_TYPE_METHOD:
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AcpiOsPrintf ("Executing ");
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break;
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default:
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AcpiOsPrintf ("Initializing ");
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break;
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}
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/* Print the object type and pathname */
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AcpiOsPrintf ("%-12s %s",
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AcpiUtGetTypeName (Type), (char *) Buffer.Pointer);
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/* Extra path is used to append names like _STA, _INI, etc. */
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if (Path)
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{
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AcpiOsPrintf (".%s", Path);
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}
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AcpiOsPrintf ("\n");
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ACPI_FREE (Buffer.Pointer);
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}
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#endif
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