a6eaba4d7f
Make the function comments follow EDK2 coding style. Cc: Sami Mujawar <sami.mujawar@arm.com> Cc: Evan Lloyd <evan.lloyd@arm.com> Cc: Jaben Carsey <jaben.carsey@intel.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/** @file
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MCFG table parser
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Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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@par Reference(s):
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- PCI Firmware Specification - Revision 3.2, January 26, 2015.
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**/
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#include <IndustryStandard/Acpi.h>
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#include <Library/UefiLib.h>
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#include "AcpiParser.h"
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#include "AcpiTableParser.h"
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// Local variables
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STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
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/**
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An ACPI_PARSER array describing the ACPI MCFG Table.
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**/
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STATIC CONST ACPI_PARSER McfgParser[] = {
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PARSE_ACPI_HEADER (&AcpiHdrInfo),
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{L"Reserved", 8, 36, L"0x%lx", NULL, NULL, NULL, NULL},
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};
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/**
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An ACPI_PARSER array describing the PCI configuration Space Base Address structure.
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**/
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STATIC CONST ACPI_PARSER PciCfgSpaceBaseAddrParser[] = {
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{L"Base Address", 8, 0, L"0x%lx", NULL, NULL, NULL, NULL},
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{L"PCI Segment Group No.", 2, 8, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Start Bus No.", 1, 10, L"0x%x", NULL, NULL, NULL, NULL},
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{L"End Bus No.", 1, 11, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Reserved", 4, 12, L"0x%x", NULL, NULL, NULL, NULL}
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};
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/**
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This function parses the ACPI MCFG table.
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When trace is enabled this function parses the MCFG table and
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traces the ACPI table fields.
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This function also performs validation of the ACPI table fields.
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@param [in] Trace If TRUE, trace the ACPI fields.
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@param [in] Ptr Pointer to the start of the buffer.
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@param [in] AcpiTableLength Length of the ACPI table.
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@param [in] AcpiTableRevision Revision of the ACPI table.
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**/
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VOID
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EFIAPI
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ParseAcpiMcfg (
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IN BOOLEAN Trace,
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IN UINT8* Ptr,
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IN UINT32 AcpiTableLength,
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IN UINT8 AcpiTableRevision
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)
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{
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UINT32 Offset;
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UINT32 PciCfgOffset;
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UINT8* PciCfgSpacePtr;
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if (!Trace) {
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return;
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}
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Offset = ParseAcpi (
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TRUE,
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0,
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"MCFG",
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Ptr,
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AcpiTableLength,
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PARSER_PARAMS (McfgParser)
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);
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PciCfgSpacePtr = Ptr + Offset;
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while (Offset < AcpiTableLength) {
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PciCfgOffset = ParseAcpi (
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TRUE,
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2,
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"PCI Configuration Space",
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PciCfgSpacePtr,
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(AcpiTableLength - Offset),
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PARSER_PARAMS (PciCfgSpaceBaseAddrParser)
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);
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PciCfgSpacePtr += PciCfgOffset;
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Offset += PciCfgOffset;
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}
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}
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