diff options
Diffstat (limited to 'libcpu/risc-v/e310/stack.c')
| -rw-r--r-- | libcpu/risc-v/e310/stack.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/libcpu/risc-v/e310/stack.c b/libcpu/risc-v/e310/stack.c new file mode 100644 index 0000000000..1d17a0c36b --- /dev/null +++ b/libcpu/risc-v/e310/stack.c @@ -0,0 +1,92 @@ +/* + * File : stack.c + * This file is part of RT-Thread RTOS + * COPYRIGHT (C) 2006, RT-Thread Development Team + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Change Logs: + * Date Author Notes + * 2011-01-13 weety copy from mini2440 + */ +#include <rtthread.h> + +/*****************************/ +/* CPU Mode */ +/*****************************/ +#define USERMODE 0x10 +#define FIQMODE 0x11 +#define IRQMODE 0x12 +#define SVCMODE 0x13 +#define ABORTMODE 0x17 +#define UNDEFMODE 0x1b +#define MODEMASK 0x1f +#define NOINT 0xc0 + +/** + * This function will initialize thread stack + * + * @param tentry the entry of thread + * @param parameter the parameter of entry + * @param stack_addr the beginning stack address + * @param texit the function will be called when thread exit + * + * @return stack address + */ +rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, + rt_uint8_t *stack_addr, void *texit) +{ + rt_uint32_t *stk; + + //stk = (rt_uint32_t*)stack_addr; + stack_addr += sizeof(rt_uint32_t); + stack_addr = (rt_uint8_t *)RT_ALIGN_DOWN((rt_uint32_t)stack_addr, 8); + stk = (rt_uint32_t *)stack_addr; + + *(--stk) = (rt_uint32_t)tentry; /* entry point */ + *(--stk) = (rt_uint32_t)texit; /* ra */ + *(--stk) = (rt_uint32_t)parameter; /* a0 */ + *(--stk) = 0xffffffff; /* a1 */ + *(--stk) = 0xffffffff; /* a2 */ + *(--stk) = 0xffffffff; /* a3 */ + *(--stk) = 0xffffffff; /* a4 */ + *(--stk) = 0xffffffff; /* a5 */ + *(--stk) = 0xffffffff; /* a6 */ + *(--stk) = 0xffffffff; /* a7 */ + *(--stk) = 0xffffffff; /* s0/fp */ + *(--stk) = 0xffffffff; /* s1 */ + *(--stk) = 0xffffffff; /* s2 */ + *(--stk) = 0xffffffff; /* s3 */ + *(--stk) = 0xffffffff; /* s4 */ + *(--stk) = 0xffffffff; /* s5 */ + *(--stk) = 0xffffffff; /* s6 */ + *(--stk) = 0xffffffff; /* s7 */ + *(--stk) = 0xffffffff; /* s8 */ + *(--stk) = 0xffffffff; /* s9 */ + *(--stk) = 0xffffffff; /* s10*/ + *(--stk) = 0xffffffff; /* s11*/ + *(--stk) = 0xffffffff; /* t0 */ + *(--stk) = 0xffffffff; /* t1 */ + *(--stk) = 0xffffffff; /* t2 */ + *(--stk) = 0xffffffff; /* t3 */ + *(--stk) = 0xffffffff; /* t4 */ + *(--stk) = 0xffffffff; /* t5 */ + *(--stk) = 0xffffffff; /* t6 */ + *(--stk) = 0xffffffff; /* tp */ + *(--stk) = 0xffffffff; /* gp */ +// *(--stk) = (rt_uint32_t)parameter; /* r0 : argument */ + /* return task's current stack address */ + return (rt_uint8_t *)stk; +} |