[PATCH edk2-platforms v3 2/6] Platform/ARM/Sgi: add NOR flash platform library implementation

[Thomas Abraham <thomas.abraham@arm.com>]

From: Vishwanatha HG <vishwanatha.hg@arm.com>

Add a initial NOR flash driver platform wrapper as part of the platform
library. Access to NOR flash devices connected to CS0 and CS1 is enabled
in this initial implementation.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Vishwanatha HG <vishwanatha.hg@arm.com>
Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>
---
 Platform/ARM/SgiPkg/Library/NorFlashLib/NorFlash.c | 66 ++++++++++++++++++++++
 .../ARM/SgiPkg/Library/NorFlashLib/NorFlashLib.inf | 34 +++++++++++
 2 files changed, 100 insertions(+)
 create mode 100644 Platform/ARM/SgiPkg/Library/NorFlashLib/NorFlash.c
 create mode 100644 Platform/ARM/SgiPkg/Library/NorFlashLib/NorFlashLib.inf

diff --git a/Platform/ARM/SgiPkg/Library/NorFlashLib/NorFlash.c b/Platform/ARM/SgiPkg/Library/NorFlashLib/NorFlash.c
new file mode 100644
index 0000000..9b4981f
--- /dev/null
+++ b/Platform/ARM/SgiPkg/Library/NorFlashLib/NorFlash.c
@@ -0,0 +1,66 @@
+/** @file
+
+  Copyright (c) 2018, ARM Ltd. All rights reserved.
+
+  This program and the accompanying materials are licensed and made available
+  under the terms and conditions of the BSD License which accompanies this
+  distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ **/
+
+#include <PiDxe.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/NorFlashPlatformLib.h>
+#include <SgiPlatform.h>
+
+STATIC NOR_FLASH_DESCRIPTION mNorFlashDevices[] = {
+  {
+    SGI_EXP_SMC_CS0_BASE,
+    SGI_EXP_SMC_CS0_BASE,
+    SIZE_256KB * 256,
+    SIZE_256KB,
+    {0xEBF0B9DF, 0x17d0, 0x4812, { 0xA9, 0x59, 0xCF, 0xD7, 0x92, 0xEE, 0x31, 0x13} }
+  },
+  {
+    SGI_EXP_SMC_CS1_BASE,
+    SGI_EXP_SMC_CS1_BASE,
+    SIZE_256KB * 256,
+    SIZE_256KB,
+    { 0x1F15DA3C, 0x37FF, 0x4070, { 0xB4, 0x71, 0xBB, 0x4A, 0xF1, 0x2A, 0x72, 0x4A } }
+  },
+};
+
+EFI_STATUS
+NorFlashPlatformInitialization (
+  VOID
+  )
+{
+  UINT64 SysRegFlash;
+
+  SysRegFlash = SGI_EXP_SYSPH_SYSTEM_REGISTERS + SGI_SYSPH_SYS_REG_FLASH;
+  if ((MmioRead32 (SysRegFlash) & SGI_SYSPH_SYS_REG_FLASH_RWEN) == 0) {
+    MmioWrite32 (SysRegFlash, 1);
+  }
+
+  return EFI_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;
+}
diff --git a/Platform/ARM/SgiPkg/Library/NorFlashLib/NorFlashLib.inf b/Platform/ARM/SgiPkg/Library/NorFlashLib/NorFlashLib.inf
new file mode 100644
index 0000000..4db2fd8
--- /dev/null
+++ b/Platform/ARM/SgiPkg/Library/NorFlashLib/NorFlashLib.inf
@@ -0,0 +1,34 @@
+#/** @file
+#
+#  Copyright (c) 2018, ARM Ltd. All rights reserved.
+
+#  This program and the accompanying materials are licensed and made available
+#  under the terms and conditions of the BSD License which accompanies this
+#  distribution.  The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x0001001A
+  BASE_NAME                      = NorFlashSgiLib
+  FILE_GUID                      = 3f021755-6d74-4065-9ee4-98225267b36e
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = NorFlashPlatformLib
+
+[Sources.common]
+  NorFlash.c
+
+[Packages]
+  ArmPlatformPkg/ArmPlatformPkg.dec
+  MdePkg/MdePkg.dec
+  Platform/ARM/SgiPkg/SgiPlatform.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+  IoLib
-- 
2.7.4