| /****************************************************************************** |
| * |
| * Copyright (C) 2009 - 2015 Xilinx, Inc. All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * Use of the Software is limited solely to applications: |
| * (a) running on a Xilinx device, or |
| * (b) that interact with a Xilinx device through a bus or interconnect. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF |
| * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * Except as contained in this notice, the name of the Xilinx shall not be used |
| * in advertising or otherwise to promote the sale, use or other dealings in |
| * this Software without prior written authorization from Xilinx. |
| * |
| ******************************************************************************/ |
| /*****************************************************************************/ |
| /** |
| * @file xil-crt0.S |
| * |
| * <pre> |
| * 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 |
| * 3.07a sgd 07/05/12 Updated with reset and start Global Timer |
| * 3.07a sgd 10/19/12 SMC NOR and SRAM initialization with build option |
| * 4.2 pkp 08/04/14 Removed PEEP board related code which contained |
| * initialization of uart smc nor and sram |
| * 5.3 pkp 10/07/15 Added support for OpenAMP by not initializing global |
| * timer when USE_AMP flag is defined |
| * </pre> |
| * |
| * @note |
| * |
| * None. |
| * |
| ******************************************************************************/ |
| |
| .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 */ |
| |
| /* Reset and start Global Timer */ |
| mov r0, #0x0 |
| mov r1, #0x0 |
| |
| #if USE_AMP != 1 |
| bl XTime_SetTime |
| #endif |
| |
| #ifdef PROFILING /* defined in Makefile */ |
| /* Setup profiling stuff */ |
| bl _profile_init |
| #endif /* PROFILING */ |
| |
| /* 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 |