mirror of https://github.com/acidanthera/audk.git
72 lines
2.5 KiB
NASM
Executable File
72 lines
2.5 KiB
NASM
Executable File
//------------------------------------------------------------------------------
|
|
//
|
|
// Copyright (c) 2008-2009 Apple Inc. All rights reserved.
|
|
//
|
|
// 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/PcdLib.h>
|
|
#include <AutoGen.h>
|
|
INCLUDE AsmMacroIoLib.inc
|
|
|
|
IMPORT CEntryPoint
|
|
EXPORT _ModuleEntryPoint
|
|
|
|
PRESERVE8
|
|
AREA ModuleEntryPoint, CODE, READONLY
|
|
|
|
|
|
_ModuleEntryPoint
|
|
|
|
//Disable L2 cache
|
|
mrc p15, 0, r0, c1, c0, 1 // read Auxiliary Control Register
|
|
bic r0, r0, #0x00000002 // disable L2 cache
|
|
mcr p15, 0, r0, c1, c0, 1 // store Auxiliary Control Register
|
|
|
|
//Enable Strict alignment checking & Instruction cache
|
|
mrc p15, 0, r0, c1, c0, 0
|
|
bic r0, r0, #0x00002300 /* clear bits 13, 9:8 (--V- --RS) */
|
|
bic r0, r0, #0x00000005 /* clear bits 0, 2 (---- -C-M) */
|
|
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 in internal RAM*/
|
|
stack_pointer_setup
|
|
|
|
//
|
|
// 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
|
|
|
|
//Enter SVC mode and set up SVC stack pointer
|
|
mov r0,#0x13|0x80|0x40
|
|
msr CPSR_c,r0
|
|
mov r13,r4
|
|
|
|
// Call C entry point
|
|
mov r0, #0x80000000 /* memory base arg0 */
|
|
mov r1, #0x10000000 /* memory size arg1 */
|
|
blx CEntryPoint /* Assume C code is thumb */
|
|
|
|
ShouldNeverGetHere
|
|
/* _CEntryPoint should never return */
|
|
b ShouldNeverGetHere
|
|
|
|
END
|
|
|