Check if Acpi table is already installed by locating the first ACPI table
in XSDT/RSDT based on Signature
Cc: Chasel Chiu <chasel.c...@intel.com>
Cc: Nate DeSimone <nathaniel.l.desim...@intel.com>
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Cc: Eric Dong <eric.d...@intel.com>
Signed-off-by: kavya <k.kavyax.sravan...@intel.com>
Reviewed-by: Zhiguang Liu <zhiguang....@intel.com>
---
Platform/Intel/MinPlatformPkg/Acpi/AcpiTables/AcpiPlatform.c | 18
++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/Platform/Intel/MinPlatformPkg/Acpi/AcpiTables/AcpiPlatform.c
b/Platform/Intel/MinPlatformPkg/Acpi/AcpiTables/AcpiPlatform.c
index 785cf4c2f9..dcbb8b7c7f 100644
--- a/Platform/Intel/MinPlatformPkg/Acpi/AcpiTables/AcpiPlatform.c
+++ b/Platform/Intel/MinPlatformPkg/Acpi/AcpiTables/AcpiPlatform.c
@@ -1048,12 +1048,21 @@ InstallMcfgFromScratch (
{
EFI_STATUS
Status;
EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER
*McfgTable;
+ EFI_ACPI_COMMON_HEADER
*Mcfg;
EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE
*Segment;
UINTN
Index;
UINTN
SegmentCount;
PCI_SEGMENT_INFO
*PciSegmentInfo;
UINTN
TableHandle;
+ Mcfg = (EFI_ACPI_COMMON_HEADER *) EfiLocateFirstAcpiTable (
+
EFI_ACPI_3_0_PCI_EXPRESS_MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ADDRESS_DESCRIPTION_TABLE_SIGNATURE
+ );
+ if (Mcfg != NULL) {
+ DEBUG ((DEBUG_INFO, "MCFG table already installed\n"));
+ return EFI_SUCCESS;
+ }
+
PciSegmentInfo = GetPciSegmentInfo (&SegmentCount);
McfgTable = AllocateZeroPool (
@@ -1365,6 +1374,7 @@ UpdateLocalTable (
{
EFI_STATUS Status;
EFI_ACPI_COMMON_HEADER *CurrentTable;
+ EFI_ACPI_COMMON_HEADER *Table;
EFI_ACPI_TABLE_VERSION Version;
UINTN TableHandle;
UINTN Index;
@@ -1372,6 +1382,14 @@ UpdateLocalTable (
for (Index = 0; Index < sizeof(mLocalTable)/sizeof(mLocalTable[0]); Index++)
{
CurrentTable = mLocalTable[Index];
+ Table = (EFI_ACPI_COMMON_HEADER *) EfiLocateFirstAcpiTable
(CurrentTable->Signature);
+ if (Table != NULL) {
+ DEBUG ((DEBUG_INFO, "Acpi table with signature=%c%c%c%c already
installed\n",
+ ((CHAR8*)&CurrentTable->Signature)[0],
((CHAR8*)&CurrentTable->Signature)[1],
+ ((CHAR8*)&CurrentTable->Signature)[2],
((CHAR8*)&CurrentTable->Signature)[3]));
+ continue;
+ }
+
PlatformUpdateTables (CurrentTable, &Version);
TableHandle = 0;
--
2.16.2.windows.1
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