72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
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/*
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* File : stack.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://openlab.rt-thread.com/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2011-12-17 nl1031 first implementation for MicroBlaze.
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*
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*/
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#include <rtthread.h>
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extern void *_SDA_BASE_;
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extern void *_SDA2_BASE_;
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/**
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* This function will initialize thread stack
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*
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* @param tentry the entry of thread
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* @param parameter the parameter of entry
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* @param stack_addr the beginning stack address
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* @param texit the function will be called when thread exit
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*
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* @return stack address
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*/
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rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
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rt_uint8_t *stack_addr, void *texit)
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{
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unsigned long *stk;
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stk = (unsigned long *)stack_addr;
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stk--;
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stk--;
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*stk-- = 0; /* r31 */
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*stk-- = 0; /* r30 */
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*stk-- = 0; /* r29 */
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*stk-- = 0; /* r28 */
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*stk-- = 0; /* r27 */
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*stk-- = 0; /* r26 */
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*stk-- = 0; /* r25 */
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*stk-- = 0; /* r24 */
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*stk-- = 0; /* r23 */
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*stk-- = 0; /* r22 */
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*stk-- = 0; /* r21 */
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*stk-- = 0; /* r20 */
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*stk-- = 0; /* r19 */
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*stk-- = 0; /* r18 */
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*stk-- = 0; /* r17 */
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*stk-- = (unsigned long)texit - 8; /* r15 = task return address*/
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*stk-- = (unsigned long)tentry; /* r14 = entry address*/
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*stk-- = (unsigned long)&_SDA_BASE_; /* r13 */
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*stk-- = 0; /* r12 */
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*stk-- = 0; /* r11 */
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*stk-- = 0; /* r10 */
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*stk-- = 0; /* r09 */
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*stk-- = 0; /* r08 */
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*stk-- = 0; /* r07 */
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*stk-- = 0; /* r06 */
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*stk-- = (unsigned long) parameter; /* r05 */
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*stk-- = 0; /* r04 */
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*stk-- = 0; /* r03 */
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*stk-- = (unsigned long)&_SDA2_BASE_; /* r02 */
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*stk = 2; /* enable interrupt */
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return (rt_uint8_t *)stk;
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}
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