/* $Id: xil-crt0.S,v 1.1.4.2 2011/11/04 11:42:34 sadanan Exp $*/ /****************************************************************************** * * (c) Copyright 2009-2010 Xilinx, Inc. All rights reserved. * * This file contains confidential and proprietary information of Xilinx, Inc. * and is protected under U.S. and international copyright and other * intellectual property laws. * * DISCLAIMER * This disclaimer is not a license and does not grant any rights to the * materials distributed herewith. Except as otherwise provided in a valid * license issued to you by Xilinx, and to the maximum extent permitted by * applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL * FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS, * IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF * MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; * and (2) Xilinx shall not be liable (whether in contract or tort, including * negligence, or under any other theory of liability) for any loss or damage * of any kind or nature related to, arising under or in connection with these * materials, including for any direct, or any indirect, special, incidental, * or consequential loss or damage (including loss of data, profits, goodwill, * or any type of loss or damage suffered as a result of any action brought by * a third party) even if such damage or loss was reasonably foreseeable or * Xilinx had been advised of the possibility of the same. * * CRITICAL APPLICATIONS * Xilinx products are not designed or intended to be fail-safe, or for use in * any application requiring fail-safe performance, such as life-support or * safety devices or systems, Class III medical devices, nuclear facilities, * applications related to the deployment of airbags, or any other applications * that could lead to death, personal injury, or severe property or * environmental damage (individually and collectively, "Critical * Applications"). Customer assumes the sole risk and liability of any use of * Xilinx products in Critical Applications, subject only to applicable laws * and regulations governing limitations on product liability. * * THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE * AT ALL TIMES. * ******************************************************************************/ /*****************************************************************************/ /** * @file xil-crt0.S * * * MODIFICATION HISTORY: * * Ver Who Date Changes * ----- ---- -------- --------------------------------------------------- * 1.00a ecm 10/20/09 Initial version * 3.05a sdm 02/02/12 Added code for profiling * 3.06a sgd 05/16/12 Added global constructors and cleanup code * Uart initialization based on compiler flag * * * @note * * None. * ******************************************************************************/ .extern XSmc_NorInit .extern XSmc_SramInit .file "xil-crt0.S" .section ".got2","aw" .align 2 .text .Lsbss_start: .long __sbss_start .Lsbss_end: .long __sbss_end .Lbss_start: .long __bss_start .Lbss_end: .long __bss_end .Lstack: .long __stack .globl _start _start: bl __cpu_init /* Initialize the CPU first (BSP provides this) */ mov r0, #0 /* clear sbss */ ldr r1,.Lsbss_start /* calculate beginning of the SBSS */ ldr r2,.Lsbss_end /* calculate end of the SBSS */ .Lloop_sbss: cmp r1,r2 bge .Lenclsbss /* If no SBSS, no clearing required */ str r0, [r1], #4 b .Lloop_sbss .Lenclsbss: /* clear bss */ ldr r1,.Lbss_start /* calculate beginning of the BSS */ ldr r2,.Lbss_end /* calculate end of the BSS */ .Lloop_bss: cmp r1,r2 bge .Lenclbss /* If no BSS, no clearing required */ str r0, [r1], #4 b .Lloop_bss .Lenclbss: /* set stack pointer */ ldr r13,.Lstack /* stack address */ #ifdef PEEP /* Initialize STDOUT */ bl Init_Uart #endif #ifdef PROFILING /* defined in Makefile */ /* Setup profiling stuff */ bl _profile_init #endif /* PROFILING */ /* Initialize the SMC interfaces for NOR and SRAM */ #ifndef USE_AMP bl XSmc_NorInit bl XSmc_SramInit #endif /* run global constructors */ bl __libc_init_array /* make sure argc and argv are valid */ mov r0, #0 mov r1, #0 /* Let her rip */ bl main /* Cleanup global constructors */ bl __libc_fini_array #ifdef PROFILING /* Cleanup profiling stuff */ bl _profile_clean #endif /* PROFILING */ /* All done */ bl exit .Lexit: /* should never get here */ b .Lexit .Lstart: .size _start,.Lstart-_start
