1 files changed, 68 insertions, 0 deletions
diff --git a/ArmRealViewEbPkg/Sec/ModuleEntryPoint.S b/ArmRealViewEbPkg/Sec/ModuleEntryPoint.S
new file mode 100755
index 0000000000..2b5ee8f31a
--- /dev/null
+++ b/ArmRealViewEbPkg/Sec/ModuleEntryPoint.S
@@ -0,0 +1,68 @@
+#------------------------------------------------------------------------------ 
+#
+# ARM EB Entry point. Reset vector in FV header will brach to
+# _ModuleEntryPoint. 
+#
+# We use crazy macros, like LoadConstantToReg, since Xcode assembler 
+# does not support = assembly syntax for ldr.
+#
+# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+#
+# 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 <Base.h>
+#include <Library/PcdLib.h>
+#include <ArmEb/ArmEb.h>
+
+.text
+.align 3
+
+.globl ASM_PFX(CEntryPoint)
+.globl ASM_PFX(_ModuleEntryPoint)
+
+ASM_PFX(_ModuleEntryPoint):
+ 
+  // Turn off remapping NOR to 0. We can now use DRAM in low memory
+  // CAN'T DO THIS HERE -- BRANCH FROM RESET VECTOR IS RELATIVE AND REMAINS IN REMAPPED NOR
+  //MmioOr32 (EB_SP810_CTRL_BASE ,BIT8) 
+
+  // Enable NEON register in case folks want to use them for optimizations (CopyMem)
+  mrc     p15, 0, r0, c1, c0, 2
+  orr     r0, r0, #0x00f00000   // Enable VPF access (V* instructions)
+  mcr     p15, 0, r0, c1, c0, 2
+  mov     r0, #0x40000000       // Set EN bit in FPEXC
+  mcr     p10,#0x7,r0,c8,c0,#0  // msr     FPEXC,r0 in ARM assembly
+   
+  // Set CPU vectors to 0 (which is currently flash)
+  LoadConstantToReg (FixedPcdGet32(PcdCpuVectorBaseAddress) ,r0) // Get vector base
+  mcr     p15, 0, r0, c12, c0, 0
+  isb                               // Sync changes to control registers
+
+  //
+  // Set stack based on PCD values. Need to do it this way to make C code work 
+  // when it runs from FLASH. 
+  //  
+  LoadConstantToReg (FixedPcdGet32(PcdPrePiStackBase) ,r2)    // stack base arg2  
+  LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r3)    // stack size arg3  
+  add     r4, r2, r3
+  mov     r13, r4
+
+  // Call C entry point
+  LoadConstantToReg (FixedPcdGet32(PcdMemorySize) ,r1)    // memory size arg1      
+  LoadConstantToReg (FixedPcdGet32(PcdMemoryBase) ,r0)    // memory size arg0       
+  blx      ASM_PFX(CEntryPoint) 
+
+ShouldNeverGetHere:
+  // _CEntryPoint should never return 
+  b       ShouldNeverGetHere
+
+