/* ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio. This file is part of ChibiOS/RT. ChibiOS/RT 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 3 of the License, or (at your option) any later version. ChibiOS/RT 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, see . */ /* * Generic ARM-CortexM3 startup file for ChibiOS/RT. */ .set CONTROL_MODE_PRIVILEGED, 0 .set CONTROL_MODE_UNPRIVILEGED, 1 .set CONTROL_USE_MSP, 0 .set CONTROL_USE_PSP, 2 .text .balign 2 .syntax unified .thumb /* * Reset handler. */ .thumb_func .global ResetHandler ResetHandler: /* Interrupts globally masked. */ cpsid i /* * Stack pointers initialization. */ ldr r0, =__ram_end__ ldr r1, =__main_stack_size__ sub r0, r0, r1 /* { r0 = main stack low address } */ msr PSP, r0 // ldr r1, =__process_stack_size__ // sub r0, r0, r1 /* Early initialization. */ bl hwinit0 /* * Data initialization. * NOTE: It assumes that the DATA size is a multiple of 4. */ ldr r1, =_textdata ldr r2, =_data ldr r3, =_edata dloop: cmp r2, r3 ittt lo ldrlo r0, [r1], #4 strlo r0, [r2], #4 blo dloop /* * BSS initialization. * NOTE: It assumes that the BSS size is a multiple of 4. */ movs r0, #0 ldr r1, =_bss_start ldr r2, =_bss_end bloop: cmp r1, r2 itt lo strlo r0, [r1], #4 blo bloop /* Switches to the Process Stack. */ movs r0, #CONTROL_MODE_PRIVILEGED | CONTROL_USE_PSP msr CONTROL, r0 isb /* Late initialization. */ bl hwinit1 /* main(0, NULL). */ movs r0, #0 mov r1, r0 bl main bl port_halt /* * Default early initialization code. It is declared weak in order to be * replaced by the real initialization code. * Early initialization is performed just after reset before BSS and DATA * segments initialization. */ .thumb_func .global hwinit0 .weak hwinit0 hwinit0: bx lr /* * Default late initialization code. It is declared weak in order to be * replaced by the real initialization code. * Late initialization is performed after BSS and DATA segments initialization * and before invoking the main() function. */ .thumb_func .global hwinit1 .weak hwinit1 hwinit1: bx lr