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/* Cstartup header for the application to be started by at91dfu
* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
//#define DEBUG_LL
#ifdef DEBUG_LL
/* Debugging macros for switching on/off LED1 (green) */
#define PIOA_PER 0xFFFFF400
#define PIOA_OER 0xFFFFF410
#define PIOA_SODR 0xFFFFF430
#define PIOA_CODR 0xFFFFF434
#define LED1 25 /* this only works on OpenPICC, not Olimex */
.macro led1on
ldr r2, =PIOA_CODR
mov r1, #(1 << LED1)
str r1, [r2]
.endm
.macro led1off
ldr r2, =PIOA_SODR
mov r1, #(1 << LED1)
str r1, [r2]
.endm
.macro ledinit
ldr r2, =PIOA_PER
mov r1, #(1 << LED1)
str r1, [r2]
ldr r2, =PIOA_OER
str r1, [r2]
led1off
.endm
#else
.macro ledinit
.endm
.macro led1on
.endm
.macro led1off
.endm
#endif
.global _startup
.func _startup
_startup:
/* Relocate .data section (copy from Flash to RAM) */
ldr r1, =_etext
ldr r2, =_data
ldr r3, =_edata
loop_r: cmp r2, r3
ldrlo r0, [r1], #4
strlo r0, [r2], #4
blo loop_r
/* Clear .bss section (Zero init) */
mov r0, #0
ldr r1, =__bss_start__
ldr r2, =__bss_end__
loop_z: cmp r1, r2
strlo r0, [r1], #4
blo loop_z
led1on
/* prepare C function call to main */
mov r0, #0 /* argc = 0 */
ldr lr, =exit
ldr r10, =main
bx r10
.size _startup, . - _startup
.endfunc
/* "exit" dummy to avoid sbrk write read etc. needed by the newlib default "exit" */
.global exit
.func exit
exit:
b .
.size exit, . - exit
.endfunc
.end
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