We want to have dynaminc PCI Express variables. Which forces us to
generate MCFG from C code.
Signed-off-by: Marcin Juszkiewicz <marcin.juszkiew...@linaro.org>
---
Silicon/Qemu/SbsaQemu/AcpiTables/AcpiTables.inf | 1 -
.../Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c | 83 ++++++++++++++++++++
Silicon/Qemu/SbsaQemu/AcpiTables/Mcfg.aslc | 43 ----------
3 files changed, 83 insertions(+), 44 deletions(-)
diff --git a/Silicon/Qemu/SbsaQemu/AcpiTables/AcpiTables.inf
b/Silicon/Qemu/SbsaQemu/AcpiTables/AcpiTables.inf
index 8d4905362edc..37abf2f4c512 100644
--- a/Silicon/Qemu/SbsaQemu/AcpiTables/AcpiTables.inf
+++ b/Silicon/Qemu/SbsaQemu/AcpiTables/AcpiTables.inf
@@ -19,7 +19,6 @@ [Sources]
Dbg2.aslc
Dsdt.asl
Fadt.aslc
- Mcfg.aslc
Spcr.aslc
[Packages]
diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
index f3d5dc9e9ba7..6c7913eead81 100644
--- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
+++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
@@ -7,6 +7,7 @@
*
**/
#include <IndustryStandard/IoRemappingTable.h>
+#include <IndustryStandard/MemoryMappedConfigurationSpaceAccessTable.h>
#include <IndustryStandard/SbsaQemuAcpi.h>
#include <IndustryStandard/SbsaQemuPlatformVersion.h>
@@ -883,6 +884,83 @@ AddSsdtPcieTable (
return EFI_SUCCESS;
}
+/** Adds the MCFG ACPI table.
+
+ @param AcpiTable The ACPI Table.
+ @param PcieCfgData PCIe configuration data.
+ @param NumPcieSegments Number of PCIe segments.
+
+ @return EFI_SUCCESS on success, or an error code.
+
+**/
+STATIC
+EFI_STATUS
+AddMcfgTable (
+ IN EFI_ACPI_TABLE_PROTOCOL *AcpiTable
+ )
+{
+ EFI_STATUS Status;
+ UINTN TableHandle;
+ UINT32 TableSize;
+ EFI_PHYSICAL_ADDRESS PageAddress;
+ UINT8 *New;
+
+ EFI_ACPI_DESCRIPTION_HEADER Header =
+ SBSAQEMU_ACPI_HEADER (
+
EFI_ACPI_6_3_PCI_EXPRESS_MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ADDRESS_DESCRIPTION_TABLE_SIGNATURE,
+ EFI_ACPI_DESCRIPTION_HEADER,
+ EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE_REVISION
+ );
+
+ TableSize = sizeof
(EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER) +
+ sizeof
(EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE);
+
+ Status = gBS->AllocatePages (
+ AllocateAnyPages,
+ EfiACPIReclaimMemory,
+ EFI_SIZE_TO_PAGES (TableSize),
+ &PageAddress
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Failed to allocate pages for MCFG table\n"));
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ New = (UINT8 *)(UINTN)PageAddress;
+ ZeroMem (New, TableSize);
+
+ // Add the ACPI Description table header
+ CopyMem (New, &Header, sizeof (EFI_ACPI_DESCRIPTION_HEADER));
+ ((EFI_ACPI_DESCRIPTION_HEADER *)New)->Length = TableSize;
+ New += sizeof
(EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER);
+
+
EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE
*CfgPtr;
+
+ CfgPtr = (VOID *)New;
+
+ CfgPtr->BaseAddress = PcdGet64 (PcdPciExpressBaseAddress);
+ CfgPtr->PciSegmentGroupNumber = 0;
+ CfgPtr->StartBusNumber = PcdGet32 (PcdPciBusMin);
+ CfgPtr->EndBusNumber = PcdGet32 (PcdPciBusMax);
+
+ New += sizeof
(EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE);
+
+ // Perform Checksum
+ AcpiTableChecksum ((UINT8 *)PageAddress, TableSize);
+
+ Status = AcpiTable->InstallAcpiTable (
+ AcpiTable,
+ (EFI_ACPI_COMMON_HEADER *)PageAddress,
+ TableSize,
+ &TableHandle
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Failed to install MCFG table\n"));
+ }
+
+ return Status;
+}
+
EFI_STATUS
EFIAPI
@@ -951,6 +1029,11 @@ InitializeSbsaQemuAcpiDxe (
DEBUG ((DEBUG_ERROR, "Failed to add SSDT table\n"));
}
+ Status = AddMcfgTable (AcpiTable);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Failed to add MCFG table\n"));
+ }
+
return EFI_SUCCESS;
}
diff --git a/Silicon/Qemu/SbsaQemu/AcpiTables/Mcfg.aslc
b/Silicon/Qemu/SbsaQemu/AcpiTables/Mcfg.aslc
deleted file mode 100644
index 289f4ad4ea3a..000000000000
--- a/Silicon/Qemu/SbsaQemu/AcpiTables/Mcfg.aslc
+++ /dev/null
@@ -1,43 +0,0 @@
-/** @file
-* ACPI Memory mapped configuration space base address Description Table
(MCFG).
-*
-* Copyright (c) 2020, Linaro Limited. All rights reserved.
-*
-* SPDX-License-Identifier: BSD-2-Clause-Patent
-**/
-
-#include <IndustryStandard/Acpi.h>
-#include <IndustryStandard/MemoryMappedConfigurationSpaceAccessTable.h>
-#include <IndustryStandard/SbsaQemuAcpi.h>
-
-#pragma pack(push, 1)
-
-typedef struct {
- EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER Header;
-
EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE
Structure[1];
-} EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_DESCRIPTION_TABLE;
-
-EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_DESCRIPTION_TABLE Mcfg = {
- {
- SBSAQEMU_ACPI_HEADER (
-
EFI_ACPI_6_0_PCI_EXPRESS_MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ADDRESS_DESCRIPTION_TABLE_SIGNATURE,
- EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_DESCRIPTION_TABLE,
- EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE_REVISION),
- EFI_ACPI_RESERVED_QWORD
- },
- {
- {
- FixedPcdGet32 (PcdPciExpressBaseAddress),
- 0,
- FixedPcdGet32 (PcdPciBusMin),
- FixedPcdGet32 (PcdPciBusMax),
- EFI_ACPI_RESERVED_DWORD
- }
- }
-};
-
-#pragma pack(pop)
-
-// Reference the table being generated to prevent the optimizer
-// from removing the data structure from the executable
-VOID* CONST ReferenceAcpiTable = &Mcfg;
--
2.45.1
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