[platforms: PATCH 7/8] Marvell/Armada: Armada70x0Lib: Add support for 32-bit ARM

[Marcin Wojtas <mw@semihalf.com>]

From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

Add an ARM implementation of ArmPlatformHelper.S.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 Platform/Marvell/Armada/Library/Armada70x0Lib/ARM/ArmPlatformHelper.S | 77 ++++++++++++++++++++
 Platform/Marvell/Armada/Library/Armada70x0Lib/Armada70x0Lib.inf       |  3 +
 2 files changed, 80 insertions(+)

diff --git a/Platform/Marvell/Armada/Library/Armada70x0Lib/ARM/ArmPlatformHelper.S b/Platform/Marvell/Armada/Library/Armada70x0Lib/ARM/ArmPlatformHelper.S
new file mode 100644
index 0000000..21459e5
--- /dev/null
+++ b/Platform/Marvell/Armada/Library/Armada70x0Lib/ARM/ArmPlatformHelper.S
@@ -0,0 +1,77 @@
+//Based on ArmPlatformPkg/Library/ArmPlatformLibNull/AArch64/ArmPlatformHelper.S
+//
+//  Copyright (c) 2012-2013, ARM Limited. All rights reserved.
+//  Copyright (c) 2016, Marvell. All rights reserved.
+//  Copyright (c) 2017, Linaro Limited. 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 <AsmMacroIoLib.h>
+#include <Library/ArmLib.h>
+
+#define CCU_MC_BASE                     0xF0001700
+#define CCU_MC_RCR_OFFSET               0x0
+#define CCU_MC_RCR_REMAP_EN             BIT0
+#define CCU_MC_RCR_REMAP_SIZE(Size)     (((Size) - 1) ^ (SIZE_1MB - 1))
+
+#define CCU_MC_RSBR_OFFSET              0x4
+#define CCU_MC_RSBR_SOURCE_BASE(Base)   (((Base) >> 20) << 10)
+#define CCU_MC_RTBR_OFFSET              0x8
+#define CCU_MC_RTBR_TARGET_BASE(Base)   (((Base) >> 20) << 10)
+
+ASM_FUNC(ArmPlatformPeiBootAction)
+  .if   FixedPcdGet64 (PcdSystemMemoryBase) != 0
+  .err  PcdSystemMemoryBase should be 0x0 on this platform!
+  .endif
+
+  .if   FixedPcdGet64 (PcdSystemMemorySize) > FixedPcdGet32 (PcdDramRemapTarget)
+    //
+    // Use the low range for UEFI itself. The remaining memory will be mapped
+    // and added to the GCD map later.
+    //
+    ADRL  (r0, mSystemMemoryEnd)
+    MOV32 (r2, FixedPcdGet32 (PcdDramRemapTarget) - 1)
+    mov   r3, #0
+    strd  r2, r3, [r0]
+  .endif
+
+  bx    lr
+
+//UINTN
+//ArmPlatformGetCorePosition (
+//  IN UINTN MpId
+//  );
+// With this function: CorePos = (ClusterId * 2) + CoreId
+ASM_FUNC(ArmPlatformGetCorePosition)
+  and   r1, r0, #ARM_CORE_MASK
+  and   r0, r0, #ARM_CLUSTER_MASK
+  add   r0, r1, r0, LSR #7
+  bx    lr
+
+//UINTN
+//ArmPlatformGetPrimaryCoreMpId (
+//  VOID
+//  );
+ASM_FUNC(ArmPlatformGetPrimaryCoreMpId)
+  MOV32 (r0, FixedPcdGet32(PcdArmPrimaryCore))
+  bx    lr
+
+//UINTN
+//ArmPlatformIsPrimaryCore (
+//  IN UINTN MpId
+//  );
+ASM_FUNC(ArmPlatformIsPrimaryCore)
+  MOV32 (r1, FixedPcdGet32(PcdArmPrimaryCoreMask))
+  and   r0, r0, r1
+  MOV32 (r1, FixedPcdGet32(PcdArmPrimaryCore))
+  cmp   r0, r1
+  moveq r0, #1
+  movne r0, #0
+  bx    lr
diff --git a/Platform/Marvell/Armada/Library/Armada70x0Lib/Armada70x0Lib.inf b/Platform/Marvell/Armada/Library/Armada70x0Lib/Armada70x0Lib.inf
index 838a670..0dabd4b 100644
--- a/Platform/Marvell/Armada/Library/Armada70x0Lib/Armada70x0Lib.inf
+++ b/Platform/Marvell/Armada/Library/Armada70x0Lib/Armada70x0Lib.inf
@@ -60,6 +60,9 @@
 [Sources.AArch64]
   AArch64/ArmPlatformHelper.S
 
+[Sources.ARM]
+  ARM/ArmPlatformHelper.S
+
 [FixedPcd]
   gArmTokenSpaceGuid.PcdSystemMemoryBase
   gArmTokenSpaceGuid.PcdSystemMemorySize
-- 
2.7.4