56 lines
2.6 KiB
C
56 lines
2.6 KiB
C
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/*
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* File : stack_ck802.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017-01-01 Urey first version
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*/
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#include <rtthread.h>
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rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, rt_uint8_t *stack_addr, void *texit)
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{
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rt_uint32_t *stk = (rt_uint32_t *)stack_addr;
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stk = (rt_uint32_t *)(stack_addr + sizeof(rt_uint32_t));
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stk = (rt_uint32_t *)RT_ALIGN_DOWN((rt_uint32_t)stk, 8);
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*(--stk) = (rt_uint32_t)tentry; /* Entry Point */
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*(--stk) = (rt_uint32_t)0x80000150L; /* PSR */
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*(--stk) = (rt_uint32_t)texit; /* R15 (LR) (init value will cause fault if ever used) */
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*(--stk) = (rt_uint32_t)0x13131313L; /* R13 */
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*(--stk) = (rt_uint32_t)0x12121212L; /* R12 */
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*(--stk) = (rt_uint32_t)0x11111111L; /* R11 */
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*(--stk) = (rt_uint32_t)0x10101010L; /* R10 */
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*(--stk) = (rt_uint32_t)0x09090909L; /* R9 */
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*(--stk) = (rt_uint32_t)0x08080808L; /* R8 */
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*(--stk) = (rt_uint32_t)0x07070707L; /* R7 */
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*(--stk) = (rt_uint32_t)0x06060606L; /* R6 */
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*(--stk) = (rt_uint32_t)0x05050505L; /* R5 */
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*(--stk) = (rt_uint32_t)0x04040404L; /* R4 */
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*(--stk) = (rt_uint32_t)0x03030303L; /* R3 */
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*(--stk) = (rt_uint32_t)0x02020202L; /* R2 */
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*(--stk) = (rt_uint32_t)0x01010101L; /* R1 */
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*(--stk) = (rt_uint32_t)parameter; /* R0 : argument */
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/* return task's current stack address */
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return (rt_uint8_t *)stk;
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}
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