From 97e9818a67e8d3cc221d543e6badd5d1dd770d8d Mon Sep 17 00:00:00 2001
From: andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 4 Mar 2010 01:54:09 +0000
Subject: [PATCH] Sync with ARMASM version.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10172 6f19259b-4bc3-4df7-8a09-765794883524
---
 BeagleBoardPkg/Sec/Arm/ModuleEntryPoint.S | 34 ++---------------------
 1 file changed, 3 insertions(+), 31 deletions(-)

diff --git a/BeagleBoardPkg/Sec/Arm/ModuleEntryPoint.S b/BeagleBoardPkg/Sec/Arm/ModuleEntryPoint.S
index 89bcab77ef..882aed469c 100644
--- a/BeagleBoardPkg/Sec/Arm/ModuleEntryPoint.S
+++ b/BeagleBoardPkg/Sec/Arm/ModuleEntryPoint.S
@@ -35,12 +35,11 @@ ASM_PFX(_ModuleEntryPoint):
   orr     r0, r0, #0x00000002     /* set bit 1 (A) Align */
   orr     r0, r0, #0x00001000     /* set bit 12 (I) enable I-Cache */
   mcr     p15, 0, r0, c1, c0, 0
-
+ 
   // Set CPU vectors to start of DRAM
   mov     r0, #0x80000000
   mcr     p15, 0, r0, c12, c0, 0
-
-  /* before we call C code, lets setup the stack pointer */
+  /* before we call C code, lets setup the stack pointer in internal RAM*/
 stack_pointer_setup:
 
   //
@@ -51,44 +50,17 @@ stack_pointer_setup:
   LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r3)    /* stack size arg3  */
   add     r4, r2, r3
 
-  //Enter IRQ mode and set up IRQ stack pointer
-  mov     r0,#0x12|0x80|0x40
-  msr     CPSR_c,r0
-  mov     r13,r4
-
-  //Enter Abort mode and set up Abort stack pointer
-  mov     r0,#0x17|0x80|0x40
-  msr     CPSR_c,r0
-  sub     r4, r4, #0x400
-  mov     r13,r4
-
-  //Enter Undefined mode and set up Undefined stack pointer
-  mov     r0,#0x1b|0x80|0x40
-  msr     CPSR_c,r0
-  sub     r4, r4, #0x400
-  mov     r13,r4
-
   //Enter SVC mode and set up SVC stack pointer
   mov     r0,#0x13|0x80|0x40
   msr     CPSR_c,r0
-  sub     r4, r4, #0x400
-  mov     r13,r4
-
-  //Enter System mode and set up System stack pointer
-  mov     r0,#0x1f|0x80|0x40
-  msr     CPSR_c,r0
-  sub     r4, r4, #0x400
   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) /* Assume C code is ARM      */
+  blx      ASM_PFX(CEntryPoint) /* Assume C code is thumb    */
 
 ShouldNeverGetHere:
   /* _CEntryPoint should never return */
   b       ShouldNeverGetHere
-
   
-- 
2.39.2