| andrewfish | 1fde2f6 | 2010-02-25 20:31:00 +0000 | [diff] [blame^] | 1 | #------------------------------------------------------------------------------
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| 2 | #
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| 3 | # Copyright (c) 2008-2009 Apple Inc. All rights reserved.
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| 4 | #
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| 5 | # All rights reserved. This program and the accompanying materials
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| 6 | # are licensed and made available under the terms and conditions of the BSD License
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| 7 | # which accompanies this distribution. The full text of the license may be found at
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| 8 | # http://opensource.org/licenses/bsd-license.php
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| 9 | #
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| 10 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 11 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 12 | #
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| 13 | #------------------------------------------------------------------------------
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| 14 |
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| 15 | #include <AsmMacroIoLib.h>
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| 16 | #include <Library/PcdLib.h>
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| 17 |
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| 18 | .text
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| 19 | .align 3
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| 20 |
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| 21 | .globl ASM_PFX(CEntryPoint)
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| 22 | .globl ASM_PFX(_ModuleEntryPoint)
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| 23 |
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| 24 | ASM_PFX(_ModuleEntryPoint):
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| 25 |
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| 26 | //
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| 27 | // Set stack based on PCD values. Need to do it this way to make C code work
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| 28 | // when it runs from FLASH.
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| 29 | //
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| 30 | LoadConstantToReg (FixedPcdGet32(PcdPrePiStackBase) ,r2) /* stack base arg2 */
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| 31 | LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r3) /* stack size arg3 */
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| 32 | add r4, r2, r3
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| 33 |
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| 34 | //Enter SVC mode and set up SVC stack pointer
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| 35 | mov r0,#0x13|0x80|0x40
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| 36 | msr CPSR_c,r0
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| 37 | sub r4, r4, #0x400
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| 38 | mov r13,r4
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| 39 |
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| 40 | // Call C entry point
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| 41 | LoadConstantToReg (FixedPcdGet32(PcdMemorySize) ,r1) /* memory size arg1 */
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| 42 | LoadConstantToReg (FixedPcdGet32(PcdMemoryBase) ,r0) /* memory size arg0 */
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| 43 |
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| 44 | blx ASM_PFX(CEntryPoint) /* Assume C code is ARM */
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| 45 |
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| 46 | ShouldNeverGetHere:
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| 47 | /* _CEntryPoint should never return */
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| 48 | b ShouldNeverGetHere
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| 49 |
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| 50 |
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