1 files changed, 110 insertions, 0 deletions
diff --git a/PrmPkg/PrmSsdtInstallDxe/PrmSsdtInstallDxe.c b/PrmPkg/PrmSsdtInstallDxe/PrmSsdtInstallDxe.c
new file mode 100644
index 0000000000..bd9ce2c6fa
--- /dev/null
+++ b/PrmPkg/PrmSsdtInstallDxe/PrmSsdtInstallDxe.c
@@ -0,0 +1,110 @@
+/** @file
+
+  This file contains a sample implementation of the Platform Runtime Mechanism (PRM)
+  SSDT Install library.
+
+  Copyright (c) Microsoft Corporation
+  Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <IndustryStandard/Acpi.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/DxeServicesLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Protocol/AcpiTable.h>
+
+#define _DBGMSGID_  "[PRMSSDTINSTALL]"
+
+/**
+  Installs the PRM SSDT.
+
+  @param[in]  OemId                       OEM ID to be used in the SSDT installation.
+
+  @retval EFI_SUCCESS                     The PRM SSDT was installed successfully.
+  @retval EFI_INVALID_PARAMETER           The OemId pointer argument is NULL.
+  @retval EFI_NOT_FOUND                   An instance of gEfiAcpiTableProtocolGuid was not found installed or
+                                          the SSDT (AML RAW section) could not be found in the current FV.
+  @retval EFI_OUT_OF_RESOURCES            Insufficient memory resources to install the PRM SSDT.
+
+**/
+EFI_STATUS
+InstallPrmSsdt (
+  IN  CONST UINT8                         *OemId
+  )
+{
+  EFI_STATUS                              Status;
+  UINTN                                   SsdtSize;
+  UINTN                                   TableKey;
+  EFI_ACPI_TABLE_PROTOCOL                 *AcpiTableProtocol;
+  EFI_ACPI_DESCRIPTION_HEADER             *Ssdt;
+
+  DEBUG ((DEBUG_INFO, "%a %a - Entry.\n", _DBGMSGID_, __FUNCTION__));
+
+  if (OemId == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTableProtocol);
+  if (!EFI_ERROR (Status)) {
+    //
+    // Discover the SSDT
+    //
+    Status =  GetSectionFromFv (
+                &gEfiCallerIdGuid,
+                EFI_SECTION_RAW,
+                0,
+                (VOID **) &Ssdt,
+                &SsdtSize
+                );
+    ASSERT_EFI_ERROR (Status);
+    DEBUG ((DEBUG_INFO, "%a %a: SSDT loaded...\n", _DBGMSGID_, __FUNCTION__));
+
+    //
+    // Update OEM ID in the SSDT
+    //
+    CopyMem (&Ssdt->OemId, OemId, sizeof (Ssdt->OemId));
+
+    //
+    // Publish the SSDT. Table is re-checksummed.
+    //
+    TableKey = 0;
+    Status = AcpiTableProtocol->InstallAcpiTable (
+                                  AcpiTableProtocol,
+                                  Ssdt,
+                                  SsdtSize,
+                                  &TableKey
+                                  );
+    ASSERT_EFI_ERROR (Status);
+  }
+
+  return Status;
+}
+
+/**
+  The entry point for this module.
+
+  @param[in]  ImageHandle    The firmware allocated handle for the EFI image.
+  @param[in]  SystemTable    A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS    The entry point is executed successfully.
+  @retval Others         An error occurred when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+PrmSsdtInstallEntryPoint (
+  IN EFI_HANDLE                           ImageHandle,
+  IN EFI_SYSTEM_TABLE                     *SystemTable
+  )
+{
+  EFI_STATUS    Status;
+
+  Status = InstallPrmSsdt ((UINT8 *) PcdGetPtr (PcdAcpiDefaultOemId));
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}