1*10465441SEvalZero /*
2*10465441SEvalZero * File : stack_ck802.c
3*10465441SEvalZero * This file is part of RT-Thread RTOS
4*10465441SEvalZero * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
5*10465441SEvalZero *
6*10465441SEvalZero * This program is free software; you can redistribute it and/or modify
7*10465441SEvalZero * it under the terms of the GNU General Public License as published by
8*10465441SEvalZero * the Free Software Foundation; either version 2 of the License, or
9*10465441SEvalZero * (at your option) any later version.
10*10465441SEvalZero *
11*10465441SEvalZero * This program is distributed in the hope that it will be useful,
12*10465441SEvalZero * but WITHOUT ANY WARRANTY; without even the implied warranty of
13*10465441SEvalZero * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14*10465441SEvalZero * GNU General Public License for more details.
15*10465441SEvalZero *
16*10465441SEvalZero * You should have received a copy of the GNU General Public License along
17*10465441SEvalZero * with this program; if not, write to the Free Software Foundation, Inc.,
18*10465441SEvalZero * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19*10465441SEvalZero *
20*10465441SEvalZero * Change Logs:
21*10465441SEvalZero * Date Author Notes
22*10465441SEvalZero * 2017-01-01 Urey first version
23*10465441SEvalZero */
24*10465441SEvalZero
25*10465441SEvalZero #include <rtthread.h>
26*10465441SEvalZero
rt_hw_stack_init(void * tentry,void * parameter,rt_uint8_t * stack_addr,void * texit)27*10465441SEvalZero rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, rt_uint8_t *stack_addr, void *texit)
28*10465441SEvalZero {
29*10465441SEvalZero rt_uint32_t *stk = (rt_uint32_t *)stack_addr;
30*10465441SEvalZero
31*10465441SEvalZero stk = (rt_uint32_t *)(stack_addr + sizeof(rt_uint32_t));
32*10465441SEvalZero stk = (rt_uint32_t *)RT_ALIGN_DOWN((rt_uint32_t)stk, 8);
33*10465441SEvalZero
34*10465441SEvalZero *(--stk) = (rt_uint32_t)tentry; /* Entry Point */
35*10465441SEvalZero *(--stk) = (rt_uint32_t)0x80000150L; /* PSR */
36*10465441SEvalZero *(--stk) = (rt_uint32_t)texit; /* R15 (LR) (init value will cause fault if ever used) */
37*10465441SEvalZero *(--stk) = (rt_uint32_t)0x13131313L; /* R13 */
38*10465441SEvalZero *(--stk) = (rt_uint32_t)0x12121212L; /* R12 */
39*10465441SEvalZero *(--stk) = (rt_uint32_t)0x11111111L; /* R11 */
40*10465441SEvalZero *(--stk) = (rt_uint32_t)0x10101010L; /* R10 */
41*10465441SEvalZero *(--stk) = (rt_uint32_t)0x09090909L; /* R9 */
42*10465441SEvalZero *(--stk) = (rt_uint32_t)0x08080808L; /* R8 */
43*10465441SEvalZero *(--stk) = (rt_uint32_t)0x07070707L; /* R7 */
44*10465441SEvalZero *(--stk) = (rt_uint32_t)0x06060606L; /* R6 */
45*10465441SEvalZero *(--stk) = (rt_uint32_t)0x05050505L; /* R5 */
46*10465441SEvalZero *(--stk) = (rt_uint32_t)0x04040404L; /* R4 */
47*10465441SEvalZero *(--stk) = (rt_uint32_t)0x03030303L; /* R3 */
48*10465441SEvalZero *(--stk) = (rt_uint32_t)0x02020202L; /* R2 */
49*10465441SEvalZero *(--stk) = (rt_uint32_t)0x01010101L; /* R1 */
50*10465441SEvalZero *(--stk) = (rt_uint32_t)parameter; /* R0 : argument */
51*10465441SEvalZero
52*10465441SEvalZero /* return task's current stack address */
53*10465441SEvalZero return (rt_uint8_t *)stk;
54*10465441SEvalZero }
55*10465441SEvalZero
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