325 lines
10 KiB
C
325 lines
10 KiB
C
/******************************************************************************
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*
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* Module Name: utaddress - OpRegion address range check
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2015, 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 ("utaddress")
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtAddAddressRange
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*
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* PARAMETERS: SpaceId - Address space ID
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* Address - OpRegion start address
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* Length - OpRegion length
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* RegionNode - OpRegion namespace node
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*
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* RETURN: Status
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*
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* DESCRIPTION: Add the Operation Region address range to the global list.
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* The only supported Space IDs are Memory and I/O. Called when
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* the OpRegion address/length operands are fully evaluated.
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*
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* MUTEX: Locks the namespace
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*
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* NOTE: Because this interface is only called when an OpRegion argument
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* list is evaluated, there cannot be any duplicate RegionNodes.
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* Duplicate Address/Length values are allowed, however, so that multiple
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* address conflicts can be detected.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiUtAddAddressRange (
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ACPI_ADR_SPACE_TYPE SpaceId,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 Length,
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ACPI_NAMESPACE_NODE *RegionNode)
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{
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ACPI_ADDRESS_RANGE *RangeInfo;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (UtAddAddressRange);
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if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
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(SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
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{
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return_ACPI_STATUS (AE_OK);
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}
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/* Allocate/init a new info block, add it to the appropriate list */
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RangeInfo = ACPI_ALLOCATE (sizeof (ACPI_ADDRESS_RANGE));
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if (!RangeInfo)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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RangeInfo->StartAddress = Address;
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RangeInfo->EndAddress = (Address + Length - 1);
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RangeInfo->RegionNode = RegionNode;
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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ACPI_FREE (RangeInfo);
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return_ACPI_STATUS (Status);
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}
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RangeInfo->Next = AcpiGbl_AddressRangeList[SpaceId];
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AcpiGbl_AddressRangeList[SpaceId] = RangeInfo;
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
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AcpiUtGetNodeName (RangeInfo->RegionNode),
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ACPI_FORMAT_UINT64 (Address),
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ACPI_FORMAT_UINT64 (RangeInfo->EndAddress)));
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtRemoveAddressRange
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*
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* PARAMETERS: SpaceId - Address space ID
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* RegionNode - OpRegion namespace node
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*
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* RETURN: None
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*
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* DESCRIPTION: Remove the Operation Region from the global list. The only
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* supported Space IDs are Memory and I/O. Called when an
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* OpRegion is deleted.
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*
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* MUTEX: Assumes the namespace is locked
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*
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******************************************************************************/
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void
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AcpiUtRemoveAddressRange (
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ACPI_ADR_SPACE_TYPE SpaceId,
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ACPI_NAMESPACE_NODE *RegionNode)
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{
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ACPI_ADDRESS_RANGE *RangeInfo;
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ACPI_ADDRESS_RANGE *Prev;
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ACPI_FUNCTION_TRACE (UtRemoveAddressRange);
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if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
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(SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
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{
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return_VOID;
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}
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/* Get the appropriate list head and check the list */
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RangeInfo = Prev = AcpiGbl_AddressRangeList[SpaceId];
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while (RangeInfo)
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{
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if (RangeInfo->RegionNode == RegionNode)
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{
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if (RangeInfo == Prev) /* Found at list head */
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{
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AcpiGbl_AddressRangeList[SpaceId] = RangeInfo->Next;
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}
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else
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{
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Prev->Next = RangeInfo->Next;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
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AcpiUtGetNodeName (RangeInfo->RegionNode),
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ACPI_FORMAT_UINT64 (RangeInfo->StartAddress),
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ACPI_FORMAT_UINT64 (RangeInfo->EndAddress)));
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ACPI_FREE (RangeInfo);
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return_VOID;
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}
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Prev = RangeInfo;
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RangeInfo = RangeInfo->Next;
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtCheckAddressRange
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*
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* PARAMETERS: SpaceId - Address space ID
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* Address - Start address
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* Length - Length of address range
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* Warn - TRUE if warning on overlap desired
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*
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* RETURN: Count of the number of conflicts detected. Zero is always
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* returned for Space IDs other than Memory or I/O.
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*
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* DESCRIPTION: Check if the input address range overlaps any of the
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* ASL operation region address ranges. The only supported
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* Space IDs are Memory and I/O.
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*
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* MUTEX: Assumes the namespace is locked.
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*
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******************************************************************************/
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UINT32
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AcpiUtCheckAddressRange (
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ACPI_ADR_SPACE_TYPE SpaceId,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 Length,
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BOOLEAN Warn)
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{
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ACPI_ADDRESS_RANGE *RangeInfo;
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ACPI_PHYSICAL_ADDRESS EndAddress;
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char *Pathname;
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UINT32 OverlapCount = 0;
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ACPI_FUNCTION_TRACE (UtCheckAddressRange);
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if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
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(SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
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{
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return_UINT32 (0);
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}
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RangeInfo = AcpiGbl_AddressRangeList[SpaceId];
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EndAddress = Address + Length - 1;
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/* Check entire list for all possible conflicts */
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while (RangeInfo)
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{
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/*
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* Check if the requested address/length overlaps this
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* address range. There are four cases to consider:
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*
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* 1) Input address/length is contained completely in the
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* address range
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* 2) Input address/length overlaps range at the range start
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* 3) Input address/length overlaps range at the range end
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* 4) Input address/length completely encompasses the range
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*/
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if ((Address <= RangeInfo->EndAddress) &&
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(EndAddress >= RangeInfo->StartAddress))
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{
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/* Found an address range overlap */
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OverlapCount++;
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if (Warn) /* Optional warning message */
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{
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Pathname = AcpiNsGetExternalPathname (RangeInfo->RegionNode);
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ACPI_WARNING ((AE_INFO,
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"%s range 0x%8.8X%8.8X-0x%8.8X%8.8X conflicts with OpRegion 0x%8.8X%8.8X-0x%8.8X%8.8X (%s)",
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AcpiUtGetRegionName (SpaceId),
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ACPI_FORMAT_UINT64 (Address),
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ACPI_FORMAT_UINT64 (EndAddress),
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ACPI_FORMAT_UINT64 (RangeInfo->StartAddress),
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ACPI_FORMAT_UINT64 (RangeInfo->EndAddress),
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Pathname));
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ACPI_FREE (Pathname);
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}
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}
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RangeInfo = RangeInfo->Next;
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}
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return_UINT32 (OverlapCount);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtDeleteAddressLists
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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: Delete all global address range lists (called during
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* subsystem shutdown).
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*
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******************************************************************************/
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void
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AcpiUtDeleteAddressLists (
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void)
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{
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ACPI_ADDRESS_RANGE *Next;
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ACPI_ADDRESS_RANGE *RangeInfo;
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int i;
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/* Delete all elements in all address range lists */
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for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++)
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{
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Next = AcpiGbl_AddressRangeList[i];
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while (Next)
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{
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RangeInfo = Next;
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Next = RangeInfo->Next;
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ACPI_FREE (RangeInfo);
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}
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AcpiGbl_AddressRangeList[i] = NULL;
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}
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}
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