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[/] [amber/] [trunk/] [sw/] [hello-world/] [start.S] - Rev 43
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/*----------------------------------------------------------------// //// start.S //// //// This file is part of the Amber project //// http://www.opencores.org/project,amber //// //// Description //// Assembly routines for hello-world. //// As hello-world is a stand-alone application, it needs a //// simple start function written in assembly to call the //// C code main() function. //// //// Author(s): //// - Conor Santifort, csantifort.amber@gmail.com //// ////////////////////////////////////////////////////////////////////// //// Copyright (C) 2010 Authors and OPENCORES.ORG //// //// This source file may be used and distributed without //// restriction provided that this copyright statement is not //// removed from the file and that any derivative work contains //// the original copyright notice and the associated disclaimer. //// //// This source file is free software; you can redistribute it //// and/or modify it under the terms of the GNU Lesser General //// Public License as published by the Free Software Foundation; //// either version 2.1 of the License, or (at your option) any //// later version. //// //// This source is distributed in the hope that it will be //// useful, but WITHOUT ANY WARRANTY; without even the implied //// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// PURPOSE. See the GNU Lesser General Public License for more //// details. //// //// You should have received a copy of the GNU Lesser General //// Public License along with this source; if not, download it //// from http://www.opencores.org/lgpl.shtml //// //----------------------------------------------------------------*/.section .text.globl start_start:/* Switch to User Mode *//* and unset interrupt mask bits */mov r0, #0x00000000teqp pc, r0@ Enable the cachemov r0, #0xffffffffmcr 15, 0, r0, cr3, cr0, 0 @ cacheable areamov r0, #1mcr 15, 0, r0, cr2, cr0, 0 @ cache enable@ initialize the stack pointerldr sp, AdrStack@ jump to main.extern mainbl mainb _testpass/* stack at top of ddr3 memory space */AdrStack: .word 0x8000000.section .bss.word 0x0/* ========================================================================= *//* ========================================================================= */