[edk2-devel] [edk2-platforms][PATCH V1 2/5] Silicon/ARM/NeoverseN1Soc: NOR flash library for N1Sdp

["sahil" <sahil@arm.com>]

Add NOR flash library, this library provides APIs for getting the list
of NOR flash devices on the platform.

Signed-off-by: sahil <sahil@arm.com>
---
 Silicon/ARM/NeoverseN1Soc/Library/NorFlashLib/NorFlashLib.inf | 36 ++++++++++++++
 Silicon/ARM/NeoverseN1Soc/Library/NorFlashLib/NorFlashLib.c   | 52 ++++++++++++++++++++
 2 files changed, 88 insertions(+)

diff --git a/Silicon/ARM/NeoverseN1Soc/Library/NorFlashLib/NorFlashLib.inf b/Silicon/ARM/NeoverseN1Soc/Library/NorFlashLib/NorFlashLib.inf
new file mode 100644
index 000000000000..14f81125c4e1
--- /dev/null
+++ b/Silicon/ARM/NeoverseN1Soc/Library/NorFlashLib/NorFlashLib.inf
@@ -0,0 +1,36 @@
+## @file
+#  NOR flash lib for ARM Neoverse N1 platform.
+#
+#  Copyright (c) 2023, ARM Limited. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x0001001B
+  BASE_NAME                      = NorFlashNeoverseN1SocLib
+  FILE_GUID                      = 7006fcf1-a585-4272-92e3-b286b1dff5bb
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = NorFlashPlatformLib
+
+[Sources.common]
+  NorFlashLib.c
+
+[Packages]
+  MdeModulePkg/MdeModulePkg.dec
+  MdePkg/MdePkg.dec
+  Platform/ARM/ARM.dec
+  Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+  IoLib
+
+[FixedPcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingSize
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
diff --git a/Silicon/ARM/NeoverseN1Soc/Library/NorFlashLib/NorFlashLib.c b/Silicon/ARM/NeoverseN1Soc/Library/NorFlashLib/NorFlashLib.c
new file mode 100644
index 000000000000..a508d7d77373
--- /dev/null
+++ b/Silicon/ARM/NeoverseN1Soc/Library/NorFlashLib/NorFlashLib.c
@@ -0,0 +1,52 @@
+/** @file
+*  NOR flash lib for ARM Neoverse N1 platform
+*
+*  Copyright (c) 2023, ARM Limited. All rights reserved.<BR>
+*
+*  SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/NorFlashPlatformLib.h>
+#include <NeoverseN1Soc.h>
+#include <PiDxe.h>
+
+#define FW_ENV_REGION_BASE  FixedPcdGet32 (PcdFlashNvStorageVariableBase)
+#define FW_ENV_REGION_SIZE  (FixedPcdGet32 (PcdFlashNvStorageVariableSize) +           \
+                                      FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) + \
+                                      FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize))
+
+STATIC NOR_FLASH_DESCRIPTION  mNorFlashDevices[] = {
+  {
+    /// Environment variable region
+    NEOVERSEN1SOC_SCP_QSPI_AHB_BASE,                    ///< device base
+    FW_ENV_REGION_BASE,                                 ///< region base
+    FW_ENV_REGION_SIZE,                                 ///< region size
+    SIZE_4KB,                                           ///< block size
+  },
+};
+
+/**
+  Get NOR flash region info
+
+  @param[out]    NorFlashDevices    NOR flash regions info.
+  @param[out]    Count              number of flash instance.
+
+  @retval        EFI_SUCCESS        Success.
+**/
+EFI_STATUS
+NorFlashPlatformGetDevices (
+  OUT NOR_FLASH_DESCRIPTION  **NorFlashDevices,
+  OUT UINT32                 *Count
+  )
+{
+  if ((NorFlashDevices == NULL) || (Count == NULL)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  *NorFlashDevices = mNorFlashDevices;
+  *Count           = ARRAY_SIZE (mNorFlashDevices);
+  return EFI_SUCCESS;
+}
-- 
2.25.1



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