1*10465441SEvalZero /* 2*10465441SEvalZero * File : stack.c 3*10465441SEvalZero * This file is part of RT-Thread RTOS 4*10465441SEvalZero * COPYRIGHT (C) 2006, 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://openlab.rt-thread.com/license/LICENSE 9*10465441SEvalZero * 10*10465441SEvalZero * Change Logs: 11*10465441SEvalZero * Date Author Notes 12*10465441SEvalZero */ 13*10465441SEvalZero 14*10465441SEvalZero #include <rtthread.h> 15*10465441SEvalZero 16*10465441SEvalZero #include <i386.h> 17*10465441SEvalZero 18*10465441SEvalZero /** 19*10465441SEvalZero * @addtogroup I386 20*10465441SEvalZero */ 21*10465441SEvalZero /*@{*/ 22*10465441SEvalZero 23*10465441SEvalZero /** 24*10465441SEvalZero * This function will initialize thread stack 25*10465441SEvalZero * 26*10465441SEvalZero * @param tentry the entry of thread 27*10465441SEvalZero * @param parameter the parameter of entry 28*10465441SEvalZero * @param stack_addr the beginning stack address 29*10465441SEvalZero * @param texit the function will be called when thread exit 30*10465441SEvalZero * 31*10465441SEvalZero * @return stack address 32*10465441SEvalZero */ rt_hw_stack_init(void * tentry,void * parameter,rt_uint8_t * stack_addr,void * texit)33*10465441SEvalZerort_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, 34*10465441SEvalZero rt_uint8_t *stack_addr, void *texit) 35*10465441SEvalZero { 36*10465441SEvalZero unsigned long *stk; 37*10465441SEvalZero 38*10465441SEvalZero stk = (unsigned long *)stack_addr; 39*10465441SEvalZero *(--stk) = (unsigned long)parameter; 40*10465441SEvalZero *(--stk) = (unsigned long)texit; 41*10465441SEvalZero *(--stk) = 0x200; /*flags*/ 42*10465441SEvalZero *(--stk) = 0x08; /*cs*/ 43*10465441SEvalZero *(--stk) = (unsigned long)tentry; /*eip*/ 44*10465441SEvalZero *(--stk) = 0; /*irqno*/ 45*10465441SEvalZero *(--stk) = 0x10; /*ds*/ 46*10465441SEvalZero *(--stk) = 0x10; /*es*/ 47*10465441SEvalZero *(--stk) = 0; /*eax*/ 48*10465441SEvalZero *(--stk) = 0; /*ecx*/ 49*10465441SEvalZero *(--stk) = 0; /*edx*/ 50*10465441SEvalZero *(--stk) = 0; /*ebx*/ 51*10465441SEvalZero *(--stk) = 0; /*esp*/ 52*10465441SEvalZero *(--stk) = 0; /*ebp*/ 53*10465441SEvalZero *(--stk) = 0; /*esi*/ 54*10465441SEvalZero *(--stk) = 0; /*edi*/ 55*10465441SEvalZero 56*10465441SEvalZero /* return task's current stack address */ 57*10465441SEvalZero return (rt_uint8_t *)stk; 58*10465441SEvalZero } 59*10465441SEvalZero /*@}*/ 60