1 files changed, 90 insertions, 0 deletions
diff --git a/roms/edk2/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Mcfg/McfgParser.c b/roms/edk2/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Mcfg/McfgParser.c
new file mode 100644
index 000000000..9da4d60e8
--- /dev/null
+++ b/roms/edk2/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Mcfg/McfgParser.c
@@ -0,0 +1,90 @@
+/** @file
+  MCFG table parser
+
+  Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  @par Reference(s):
+    - PCI Firmware Specification - Revision 3.2, January 26, 2015.
+**/
+
+#include <IndustryStandard/Acpi.h>
+#include <Library/UefiLib.h>
+#include "AcpiParser.h"
+#include "AcpiTableParser.h"
+
+// Local variables
+STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
+
+/**
+  An ACPI_PARSER array describing the ACPI MCFG Table.
+**/
+STATIC CONST ACPI_PARSER McfgParser[] = {
+  PARSE_ACPI_HEADER (&AcpiHdrInfo),
+  {L"Reserved", 8, 36, L"0x%lx", NULL, NULL, NULL, NULL},
+};
+
+/**
+  An ACPI_PARSER array describing the PCI configuration Space Base Address structure.
+**/
+STATIC CONST ACPI_PARSER PciCfgSpaceBaseAddrParser[] = {
+  {L"Base Address", 8, 0, L"0x%lx", NULL, NULL, NULL, NULL},
+  {L"PCI Segment Group No.", 2, 8, L"0x%x", NULL, NULL, NULL, NULL},
+  {L"Start Bus No.", 1, 10, L"0x%x", NULL, NULL, NULL, NULL},
+  {L"End Bus No.", 1, 11, L"0x%x", NULL, NULL, NULL, NULL},
+  {L"Reserved", 4, 12, L"0x%x", NULL, NULL, NULL, NULL}
+};
+
+/**
+  This function parses the ACPI MCFG table.
+  When trace is enabled this function parses the MCFG table and
+  traces the ACPI table fields.
+
+  This function also performs validation of the ACPI table fields.
+
+  @param [in] Trace              If TRUE, trace the ACPI fields.
+  @param [in] Ptr                Pointer to the start of the buffer.
+  @param [in] AcpiTableLength    Length of the ACPI table.
+  @param [in] AcpiTableRevision  Revision of the ACPI table.
+**/
+VOID
+EFIAPI
+ParseAcpiMcfg (
+  IN BOOLEAN Trace,
+  IN UINT8*  Ptr,
+  IN UINT32  AcpiTableLength,
+  IN UINT8   AcpiTableRevision
+  )
+{
+  UINT32 Offset;
+  UINT32 PciCfgOffset;
+  UINT8* PciCfgSpacePtr;
+
+  if (!Trace) {
+    return;
+  }
+
+  Offset = ParseAcpi (
+             TRUE,
+             0,
+             "MCFG",
+             Ptr,
+             AcpiTableLength,
+             PARSER_PARAMS (McfgParser)
+             );
+
+  PciCfgSpacePtr = Ptr + Offset;
+
+  while (Offset < AcpiTableLength) {
+    PciCfgOffset = ParseAcpi (
+                     TRUE,
+                     2,
+                     "PCI Configuration Space",
+                     PciCfgSpacePtr,
+                     (AcpiTableLength - Offset),
+                     PARSER_PARAMS (PciCfgSpaceBaseAddrParser)
+                     );
+    PciCfgSpacePtr += PciCfgOffset;
+    Offset += PciCfgOffset;
+  }
+}