1 files changed, 79 insertions, 0 deletions
diff --git a/ArmRealViewEbPkg/SecForPei/Arm/ModuleEntryPoint.S b/ArmRealViewEbPkg/SecForPei/Arm/ModuleEntryPoint.S
new file mode 100755
index 0000000000..f87aa58037
--- /dev/null
+++ b/ArmRealViewEbPkg/SecForPei/Arm/ModuleEntryPoint.S
@@ -0,0 +1,79 @@
+#------------------------------------------------------------------------------ 
+#
+# 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)
+.globl ASM_PFX(StartupAddr)
+
+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 (0x10001000 ,BIT8) //EB_SP810_CTRL_BASE
+
+  // 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 VFP 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) ,r0)    // temp ram base  arg 0 TODO: change "stackbase" to "temprambase"
+  LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r1)    // temp ram size  arg 1
+  lsr     r3, r1, #1   // r4 = size of temp mem / 2
+  add     r3, r3, r0  // r2 = temp ram base + r4
+  mov     r13, r3     // result: stack pointer = temp ram base + (size of temp mem / 2)
+    
+  // lr points to area in reset vector block containing PEI core address
+  ldr     r2, [lr]  // pei core   arg 3
+ 
+  // move sec startup address into a data register
+  // ensure we're jumping to FV version of the code (not boot remapped alias)
+#ifndef __APPLE__
+// This does not generate a valid relocation for Xcode. Fix me...
+  ldr   r4, ASM_PFX(StartupAddr)
+
+  // jump to SEC C code
+  blx   r4
+#endif
+  
+
+ASM_PFX(ShouldNeverGetHere):
+  // _CEntryPoint should never return 
+  b       ASM_PFX(ShouldNeverGetHere)
+
+