1 files changed, 107 insertions, 0 deletions
diff --git a/MdeModulePkg/Library/ArmFfaLib/ArmFfaSecLib.c b/MdeModulePkg/Library/ArmFfaLib/ArmFfaSecLib.c
new file mode 100644
index 0000000..7c3d39d
--- /dev/null
+++ b/MdeModulePkg/Library/ArmFfaLib/ArmFfaSecLib.c
@@ -0,0 +1,107 @@
+/** @file
+  Arm Ffa library code for PeilessSec
+
+  Copyright (c) 2025, Arm Limited. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+   @par Glossary:
+     - FF-A - Firmware Framework for Arm A-profile
+
+   @par Reference(s):
+     - Arm Firmware Framework for Arm A-Profile [https://developer.arm.com/documentation/den0077/latest]
+
+**/
+
+#include <Uefi.h>
+#include <Pi/PiMultiPhase.h>
+
+#include <Library/ArmLib.h>
+#include <Library/ArmSmcLib.h>
+#include <Library/ArmFfaLib.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+
+#include <IndustryStandard/ArmFfaSvc.h>
+
+#include <Guid/ArmFfaRxTxBufferInfo.h>
+
+#include "ArmFfaCommon.h"
+#include "ArmFfaRxTxMap.h"
+
+/**
+  ArmFfaLib Constructor.
+
+  @param [in]   FileHandle        File Handle
+  @param [in]   PeiServices       Pei Service Table
+
+  @retval EFI_SUCCESS            Success
+  @retval Others                 Error
+
+**/
+EFI_STATUS
+EFIAPI
+ArmFfaSecLibConstructor (
+  IN VOID
+  )
+{
+  EFI_STATUS                 Status;
+  ARM_FFA_RX_TX_BUFFER_INFO  *BufferInfo;
+  EFI_HOB_MEMORY_ALLOCATION  *RxTxBufferAllocationHob;
+
+  Status = ArmFfaLibCommonInit ();
+  if (EFI_ERROR (Status)) {
+    if (Status == EFI_UNSUPPORTED) {
+      /*
+       * EFI_UNSUPPORTED return from ArmFfaLibCommonInit() means
+       * FF-A interface doesn't support.
+       * However, It doesn't make failure of loading driver/library instance
+       * (i.e) ArmPkg's MmCommunication Dxe/PEI Driver uses as well as SpmMm.
+       * So If FF-A is not supported the the MmCommunication Dxe/PEI falls
+       * back to SpmMm.
+       * For this case, return EFI_SUCCESS.
+       */
+      return EFI_SUCCESS;
+    }
+
+    return Status;
+  }
+
+  Status = ArmFfaLibRxTxMap ();
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  BufferInfo = BuildGuidHob (
+                 &gArmFfaRxTxBufferInfoGuid,
+                 sizeof (ARM_FFA_RX_TX_BUFFER_INFO)
+                 );
+  if (BufferInfo == NULL) {
+    DEBUG ((DEBUG_ERROR, "%a: Failed to create Rx/Tx Buffer Info Hob\n", __func__));
+    ArmFfaLibRxTxUnmap ();
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  RxTxBufferAllocationHob = FindRxTxBufferAllocationHob (FALSE);
+  ASSERT (RxTxBufferAllocationHob != NULL);
+
+  /*
+   * Set then Name with gArmFfaRxTxBufferInfoGuid, so that ArmFfaPeiLib or
+   * ArmFfaDxeLib can find the Rx/Tx buffer allocation area.
+   */
+  CopyGuid (
+    &RxTxBufferAllocationHob->AllocDescriptor.Name,
+    &gArmFfaRxTxBufferInfoGuid
+    );
+
+  UpdateRxTxBufferInfo (BufferInfo);
+  BufferInfo->RemapOffset =
+    (UINTN)(BufferInfo->TxBufferAddr -
+            RxTxBufferAllocationHob->AllocDescriptor.MemoryBaseAddress);
+  BufferInfo->RemapRequired = TRUE;
+
+  return EFI_SUCCESS;
+}