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620 lines
18 KiB
C
620 lines
18 KiB
C
/******************************************************************************
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*
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* Module Name: exregion - ACPI default OpRegion (address space) handlers
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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 "acinterp.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exregion")
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/*******************************************************************************
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*
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* FUNCTION: AcpiExSystemMemorySpaceHandler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* BitWidth - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* HandlerContext - Pointer to Handler's context
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* RegionContext - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the System Memory address space (Op Region)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExSystemMemorySpaceHandler (
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UINT32 Function,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 BitWidth,
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UINT64 *Value,
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void *HandlerContext,
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void *RegionContext)
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{
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ACPI_STATUS Status = AE_OK;
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void *LogicalAddrPtr = NULL;
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ACPI_MEM_SPACE_CONTEXT *MemInfo = RegionContext;
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ACPI_MEM_MAPPING *Mm = MemInfo->CurMm;
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UINT32 Length;
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ACPI_SIZE MapLength;
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ACPI_SIZE PageBoundaryMapLength;
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#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
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UINT32 Remainder;
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#endif
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ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);
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/* Validate and translate the bit width */
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switch (BitWidth)
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{
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case 8:
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Length = 1;
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break;
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case 16:
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Length = 2;
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break;
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case 32:
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Length = 4;
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break;
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case 64:
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Length = 8;
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u",
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BitWidth));
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return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
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}
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#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
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/*
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* Hardware does not support non-aligned data transfers, we must verify
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* the request.
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*/
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(void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder);
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if (Remainder != 0)
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{
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return_ACPI_STATUS (AE_AML_ALIGNMENT);
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}
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#endif
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/*
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* Does the request fit into the cached memory mapping?
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* Is 1) Address below the current mapping? OR
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* 2) Address beyond the current mapping?
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*/
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if (!Mm || (Address < Mm->PhysicalAddress) ||
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((UINT64) Address + Length > (UINT64) Mm->PhysicalAddress + Mm->Length))
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{
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/*
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* The request cannot be resolved by the current memory mapping.
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*
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* Look for an existing saved mapping covering the address range
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* at hand. If found, save it as the current one and carry out
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* the access.
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*/
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for (Mm = MemInfo->FirstMm; Mm; Mm = Mm->NextMm)
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{
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if (Mm == MemInfo->CurMm)
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{
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continue;
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}
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if (Address < Mm->PhysicalAddress)
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{
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continue;
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}
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if ((UINT64) Address + Length > (UINT64) Mm->PhysicalAddress + Mm->Length)
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{
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continue;
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}
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MemInfo->CurMm = Mm;
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goto access;
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}
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/* Create a new mappings list entry */
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Mm = ACPI_ALLOCATE_ZEROED(sizeof(*Mm));
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if (!Mm)
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{
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ACPI_ERROR((AE_INFO,
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"Unable to save memory mapping at 0x%8.8X%8.8X, size %u",
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ACPI_FORMAT_UINT64(Address), Length));
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/*
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* October 2009: Attempt to map from the requested address to the
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* end of the region. However, we will never map more than one
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* page, nor will we cross a page boundary.
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*/
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MapLength = (ACPI_SIZE)
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((MemInfo->Address + MemInfo->Length) - Address);
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/*
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* If mapping the entire remaining portion of the region will cross
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* a page boundary, just map up to the page boundary, do not cross.
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* On some systems, crossing a page boundary while mapping regions
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* can cause warnings if the pages have different attributes
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* due to resource management.
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*
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* This has the added benefit of constraining a single mapping to
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* one page, which is similar to the original code that used a 4k
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* maximum window.
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*/
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PageBoundaryMapLength = (ACPI_SIZE)
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(ACPI_ROUND_UP (Address, ACPI_DEFAULT_PAGE_SIZE) - Address);
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if (PageBoundaryMapLength == 0)
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{
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PageBoundaryMapLength = ACPI_DEFAULT_PAGE_SIZE;
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}
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if (MapLength > PageBoundaryMapLength)
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{
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MapLength = PageBoundaryMapLength;
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}
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/* Create a new mapping starting at the address given */
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LogicalAddrPtr = AcpiOsMapMemory(Address, MapLength);
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if (!LogicalAddrPtr)
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{
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ACPI_ERROR ((AE_INFO,
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"Could not map memory at 0x%8.8X%8.8X, size %u",
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ACPI_FORMAT_UINT64 (Address), (UINT32) MapLength));
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ACPI_FREE(Mm);
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Save the physical address and mapping size */
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Mm->LogicalAddress = LogicalAddrPtr;
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Mm->PhysicalAddress = Address;
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Mm->Length = MapLength;
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/*
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* Add the new entry to the mappigs list and save it as the
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* current mapping.
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*/
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Mm->NextMm = MemInfo->FirstMm;
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MemInfo->FirstMm = Mm;
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MemInfo->CurMm = Mm;
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}
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access:
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/*
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* Generate a logical pointer corresponding to the address we want to
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* access
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*/
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LogicalAddrPtr = Mm->LogicalAddress +
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((UINT64) Address - (UINT64) Mm->PhysicalAddress);
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
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BitWidth, Function, ACPI_FORMAT_UINT64 (Address)));
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/*
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* Perform the memory read or write
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*
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* Note: For machines that do not support non-aligned transfers, the target
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* address was checked for alignment above. We do not attempt to break the
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* transfer up into smaller (byte-size) chunks because the AML specifically
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* asked for a transfer width that the hardware may require.
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*/
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switch (Function)
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{
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case ACPI_READ:
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*Value = 0;
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switch (BitWidth)
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{
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case 8:
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*Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
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break;
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case 16:
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*Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
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break;
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case 32:
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*Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
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break;
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case 64:
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*Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
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break;
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default:
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/* BitWidth was already validated */
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break;
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}
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break;
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case ACPI_WRITE:
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switch (BitWidth)
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{
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case 8:
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ACPI_SET8 (LogicalAddrPtr, *Value);
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break;
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case 16:
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ACPI_SET16 (LogicalAddrPtr, *Value);
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break;
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case 32:
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ACPI_SET32 (LogicalAddrPtr, *Value);
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break;
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case 64:
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ACPI_SET64 (LogicalAddrPtr, *Value);
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break;
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default:
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/* BitWidth was already validated */
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break;
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}
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break;
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default:
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Status = AE_BAD_PARAMETER;
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break;
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExSystemIoSpaceHandler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* BitWidth - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* HandlerContext - Pointer to Handler's context
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* RegionContext - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the System IO address space (Op Region)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExSystemIoSpaceHandler (
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UINT32 Function,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 BitWidth,
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UINT64 *Value,
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void *HandlerContext,
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void *RegionContext)
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{
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ACPI_STATUS Status = AE_OK;
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UINT32 Value32;
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ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler);
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
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BitWidth, Function, ACPI_FORMAT_UINT64 (Address)));
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/* Decode the function parameter */
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switch (Function)
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{
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case ACPI_READ:
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Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address,
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&Value32, BitWidth);
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*Value = Value32;
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break;
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case ACPI_WRITE:
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Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address,
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(UINT32) *Value, BitWidth);
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break;
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default:
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Status = AE_BAD_PARAMETER;
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break;
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExPciConfigSpaceHandler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* BitWidth - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* HandlerContext - Pointer to Handler's context
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* RegionContext - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the PCI Config address space (Op Region)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExPciConfigSpaceHandler (
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UINT32 Function,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 BitWidth,
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UINT64 *Value,
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void *HandlerContext,
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void *RegionContext)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_PCI_ID *PciId;
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UINT16 PciRegister;
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ACPI_FUNCTION_TRACE (ExPciConfigSpaceHandler);
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/*
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* The arguments to AcpiOs(Read|Write)PciConfiguration are:
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*
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* PciSegment is the PCI bus segment range 0-31
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* PciBus is the PCI bus number range 0-255
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* PciDevice is the PCI device number range 0-31
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* PciFunction is the PCI device function number
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* PciRegister is the Config space register range 0-255 bytes
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*
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* Value - input value for write, output address for read
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*
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*/
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PciId = (ACPI_PCI_ID *) RegionContext;
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PciRegister = (UINT16) (UINT32) Address;
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Pci-Config %u (%u) Seg(%04x) Bus(%04x) "
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"Dev(%04x) Func(%04x) Reg(%04x)\n",
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Function, BitWidth, PciId->Segment, PciId->Bus, PciId->Device,
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PciId->Function, PciRegister));
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switch (Function)
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{
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case ACPI_READ:
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*Value = 0;
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Status = AcpiOsReadPciConfiguration (
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PciId, PciRegister, Value, BitWidth);
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break;
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case ACPI_WRITE:
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Status = AcpiOsWritePciConfiguration (
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PciId, PciRegister, *Value, BitWidth);
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break;
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default:
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Status = AE_BAD_PARAMETER;
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break;
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExCmosSpaceHandler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* BitWidth - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* HandlerContext - Pointer to Handler's context
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* RegionContext - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the CMOS address space (Op Region)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExCmosSpaceHandler (
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UINT32 Function,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 BitWidth,
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UINT64 *Value,
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void *HandlerContext,
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void *RegionContext)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (ExCmosSpaceHandler);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExPciBarSpaceHandler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* BitWidth - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* HandlerContext - Pointer to Handler's context
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* RegionContext - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the PCI BarTarget address space (Op Region)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExPciBarSpaceHandler (
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UINT32 Function,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 BitWidth,
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UINT64 *Value,
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void *HandlerContext,
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void *RegionContext)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE (ExPciBarSpaceHandler);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExDataTableSpaceHandler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* BitWidth - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* HandlerContext - Pointer to Handler's context
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* RegionContext - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the Data Table address space (Op Region)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExDataTableSpaceHandler (
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UINT32 Function,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 BitWidth,
|
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UINT64 *Value,
|
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void *HandlerContext,
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void *RegionContext)
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{
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ACPI_DATA_TABLE_MAPPING *Mapping;
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char *Pointer;
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|
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ACPI_FUNCTION_TRACE (ExDataTableSpaceHandler);
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Mapping = (ACPI_DATA_TABLE_MAPPING *) RegionContext;
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Pointer = ACPI_CAST_PTR (char, Mapping->Pointer) +
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(Address - ACPI_PTR_TO_PHYSADDR (Mapping->Pointer));
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|
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/*
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* Perform the memory read or write. The BitWidth was already
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* validated.
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*/
|
|
switch (Function)
|
|
{
|
|
case ACPI_READ:
|
|
|
|
memcpy (ACPI_CAST_PTR (char, Value), Pointer, ACPI_DIV_8 (BitWidth));
|
|
break;
|
|
|
|
case ACPI_WRITE:
|
|
|
|
memcpy (Pointer, ACPI_CAST_PTR (char, Value), ACPI_DIV_8 (BitWidth));
|
|
break;
|
|
|
|
default:
|
|
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|