1*10465441SEvalZero /* 2*10465441SEvalZero * File : stack.c 3*10465441SEvalZero * This file is part of RT-Thread RTOS 4*10465441SEvalZero * COPYRIGHT (C) 2010, RT-Thread Development Team 5*10465441SEvalZero * 6*10465441SEvalZero * The license and distribution terms for this file may be 7*10465441SEvalZero * found in the file LICENSE in this distribution or at 8*10465441SEvalZero * http://www.rt-thread.org/license/LICENSE 9*10465441SEvalZero * 10*10465441SEvalZero * Change Logs: 11*10465441SEvalZero * Date Author Notes 12*10465441SEvalZero * 2010-03-30 Kyle First version 13*10465441SEvalZero */ 14*10465441SEvalZero #include <rtthread.h> 15*10465441SEvalZero 16*10465441SEvalZero /** 17*10465441SEvalZero * @addtogroup AVR32UC3 18*10465441SEvalZero */ 19*10465441SEvalZero /*@{*/ 20*10465441SEvalZero 21*10465441SEvalZero /** 22*10465441SEvalZero * This function will initialize thread stack 23*10465441SEvalZero * 24*10465441SEvalZero * @param tentry the entry of thread 25*10465441SEvalZero * @param parameter the parameter of entry 26*10465441SEvalZero * @param stack_addr the beginning stack address 27*10465441SEvalZero * @param texit the function will be called when thread exit 28*10465441SEvalZero * 29*10465441SEvalZero * @return stack address 30*10465441SEvalZero */ rt_hw_stack_init(void * tentry,void * parameter,rt_uint8_t * stack_addr,void * texit)31*10465441SEvalZerort_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, rt_uint8_t *stack_addr, void *texit) 32*10465441SEvalZero { 33*10465441SEvalZero unsigned long *stk; 34*10465441SEvalZero 35*10465441SEvalZero stk = (unsigned long *)stack_addr; 36*10465441SEvalZero *(stk) = 0; /* r8 */ 37*10465441SEvalZero *(--stk) = 0; /* r9 */ 38*10465441SEvalZero *(--stk) = 0; /* r10 */ 39*10465441SEvalZero *(--stk) = 0; /* r11 */ 40*10465441SEvalZero *(--stk) = 0; /* r12 */ 41*10465441SEvalZero *(--stk) = (unsigned long)texit; /* lr */ 42*10465441SEvalZero *(--stk) = (unsigned long)tentry; /* entry point, pc */ 43*10465441SEvalZero *(--stk) = 0x00600000; /* sr */ 44*10465441SEvalZero *(--stk) = 0; /* r0 */ 45*10465441SEvalZero *(--stk) = 0; /* r1 */ 46*10465441SEvalZero *(--stk) = 0; /* r2 */ 47*10465441SEvalZero *(--stk) = 0; /* r3 */ 48*10465441SEvalZero *(--stk) = 0; /* r4 */ 49*10465441SEvalZero *(--stk) = 0; /* r5 */ 50*10465441SEvalZero *(--stk) = 0; /* r6 */ 51*10465441SEvalZero *(--stk) = 0; /* r7 */ 52*10465441SEvalZero 53*10465441SEvalZero /* return task's current stack address */ 54*10465441SEvalZero return (rt_uint8_t *)stk; 55*10465441SEvalZero } 56*10465441SEvalZero 57*10465441SEvalZero /*@}*/ 58