1 files changed, 71 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmFfaLib/ArmFfaRxTxMap.h b/ArmPkg/Library/ArmFfaLib/ArmFfaRxTxMap.h
new file mode 100644
index 0000000000..01db339108
--- /dev/null
+++ b/ArmPkg/Library/ArmFfaLib/ArmFfaRxTxMap.h
@@ -0,0 +1,71 @@
+/** @file
+  Arm FF-A ns common library Header file
+
+  Copyright (c) 2024, Arm Limited. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  @par Glossary:
+     - FF-A - Firmware Framework for Arm A-profile
+     - spmc - Secure Partition Manager Core
+     - spmd - Secure Partition Manager Dispatcher
+
+  @par Reference(s):
+     - Arm Firmware Framework for Arm A-Profile [https://developer.arm.com/documentation/den0077/latest]
+
+**/
+
+#ifndef ARM_FFA_RX_TX_MAP_LIB_H_
+#define ARM_FFA_RX_TX_MAP_LIB_H_
+
+/**
+ * Guid Hob Data for gArmFfaRxTxBufferInfoGuid Guid Hob.
+ */
+typedef struct ArmFfaRxTxBuffersInfo {
+  /// Tx Buffer Address.
+  VOID      *TxBufferAddr;
+
+  /// Tx Buffer Size.
+  UINT64    TxBufferSize;
+
+  /// Rx Buffer Address.
+  VOID      *RxBufferAddr;
+
+  /// Rx Buffer Size.
+  UINT64    RxBufferSize;
+} ARM_FFA_RX_TX_BUFFER_INFO;
+
+/**
+  Mapping Rx/Tx buffers.
+  This function is only called in ArmFfaLibConstructor because
+  Rx/Tx buffer is registered only once per partition.
+
+  @retval EFI_SUCCESS
+  @retval EFI_ALREADY_STARTED     Rx/Tx buffer already mapped in PEI phase
+  @retval EFI_OUT_OF_RESOURCE     Out of memory
+  @retval EFI_INVALID_PARAMETER   Invalid alignment of Rx/Tx buffer
+  @retval Others                  Error
+
+**/
+EFI_STATUS
+EFIAPI
+ArmFfaLibRxTxMap (
+  IN VOID
+  );
+
+/**
+  Unmap Rx/Tx buffer.
+  This function is only called in Exit boot service because
+  Rx/Tx buffer is registered only once per partition.
+
+  @retval EFI_SUCCESS
+  @retval EFI_INVALID_PARAMETERS               Already unregistered
+  @retval EFI_UNSUPPORTED                      Not supported
+
+**/
+EFI_STATUS
+EFIAPI
+ArmFfaLibRxTxUnmap (
+  IN VOID
+  );
+
+#endif