1 files changed, 79 insertions, 0 deletions
diff --git a/PrmPkg/Samples/PrmSampleAcpiParameterBufferModule/PrmSampleAcpiParameterBufferModule.c b/PrmPkg/Samples/PrmSampleAcpiParameterBufferModule/PrmSampleAcpiParameterBufferModule.c
new file mode 100644
index 0000000000..ebb5ba01a3
--- /dev/null
+++ b/PrmPkg/Samples/PrmSampleAcpiParameterBufferModule/PrmSampleAcpiParameterBufferModule.c
@@ -0,0 +1,79 @@
+/** @file
+
+  This PRM Module demonstrates how to define an ACPI parameter buffer that is used by a PRM handler.
+
+  Copyright (c) Microsoft Corporation
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PrmModule.h>
+
+#include <Library/BaseLib.h>
+#include <Library/UefiLib.h>
+
+// TEMP
+#include <Library/DebugLib.h>
+
+#define PARAM_BUFFER_TEST_SIGNATURE         SIGNATURE_32('T','E','S','T')
+
+//
+// PRM Handler GUIDs
+//
+
+// {2e4f2d13-6240-4ed0-a401-c723fbdc34e8}
+#define CHECK_PARAM_BUFFER_PRM_HANDLER_GUID {0x2e4f2d13, 0x6240, 0x4ed0, {0xa4, 0x01, 0xc7, 0x23, 0xfb, 0xdc, 0x34, 0xe8}}
+
+/**
+  A sample Platform Runtime Mechanism (PRM) handler.
+
+  This sample handler checks if a parameter buffer is provided with the data signature
+  ('T', 'E', 'S', 'T') at the beginning of the buffer.
+
+  The contents are expected to be updated by ACPI code at OS runtime.
+
+  @param[in]  ParameterBuffer     A pointer to the PRM handler parameter buffer
+  @param[in]  ContextBUffer       A pointer to the PRM handler context buffer
+
+  @retval EFI_STATUS              The PRM handler executed successfully.
+  @retval Others                  An error occurred in the PRM handler.
+
+**/
+PRM_HANDLER_EXPORT (CheckParamBufferPrmHandler)
+{
+  if (ParameterBuffer == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  if (*((UINT32 *) ParameterBuffer) == PARAM_BUFFER_TEST_SIGNATURE) {
+    return EFI_SUCCESS;
+  }
+
+  return EFI_NOT_FOUND;
+}
+
+//
+// Register the PRM export information for this PRM Module
+//
+PRM_MODULE_EXPORT (
+  PRM_HANDLER_EXPORT_ENTRY (CHECK_PARAM_BUFFER_PRM_HANDLER_GUID, CheckParamBufferPrmHandler)
+  );
+
+/**
+  Module entry point.
+
+  @param[in]   ImageHandle     The image handle.
+  @param[in]   SystemTable     A pointer to the system table.
+
+  @retval  EFI_SUCCESS         This function always returns success.
+
+**/
+EFI_STATUS
+EFIAPI
+PrmSampleAcpiParameterBufferModuleInit (
+  IN  EFI_HANDLE                  ImageHandle,
+  IN  EFI_SYSTEM_TABLE            *SystemTable
+  )
+{
+  return EFI_SUCCESS;
+}