91 lines
4.1 KiB
C
91 lines
4.1 KiB
C
/*
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2017-07-31 tanek first implementation
|
|
*/
|
|
|
|
#include <rtthread.h>
|
|
|
|
/* flag in interrupt handling */
|
|
rt_uint32_t rt_interrupt_from_thread;
|
|
rt_uint32_t rt_interrupt_to_thread;
|
|
rt_uint32_t rt_thread_switch_interrupt_flag;
|
|
|
|
struct stack_frame
|
|
{
|
|
rt_ubase_t epc; /* epc - epc - program counter */
|
|
rt_ubase_t ra; /* x1 - ra - return address for jumps */
|
|
rt_ubase_t mstatus; /* - machine status register */
|
|
rt_ubase_t gp; /* x3 - gp - global pointer */
|
|
rt_ubase_t tp; /* x4 - tp - thread pointer */
|
|
rt_ubase_t t0; /* x5 - t0 - temporary register 0 */
|
|
rt_ubase_t t1; /* x6 - t1 - temporary register 1 */
|
|
rt_ubase_t t2; /* x7 - t2 - temporary register 2 */
|
|
rt_ubase_t s0_fp; /* x8 - s0/fp - saved register 0 or frame pointer */
|
|
rt_ubase_t s1; /* x9 - s1 - saved register 1 */
|
|
rt_ubase_t a0; /* x10 - a0 - return value or function argument 0 */
|
|
rt_ubase_t a1; /* x11 - a1 - return value or function argument 1 */
|
|
rt_ubase_t a2; /* x12 - a2 - function argument 2 */
|
|
rt_ubase_t a3; /* x13 - a3 - function argument 3 */
|
|
rt_ubase_t a4; /* x14 - a4 - function argument 4 */
|
|
rt_ubase_t a5; /* x15 - a5 - function argument 5 */
|
|
rt_ubase_t a6; /* x16 - a6 - function argument 6 */
|
|
rt_ubase_t a7; /* x17 - s7 - function argument 7 */
|
|
rt_ubase_t s2; /* x18 - s2 - saved register 2 */
|
|
rt_ubase_t s3; /* x19 - s3 - saved register 3 */
|
|
rt_ubase_t s4; /* x20 - s4 - saved register 4 */
|
|
rt_ubase_t s5; /* x21 - s5 - saved register 5 */
|
|
rt_ubase_t s6; /* x22 - s6 - saved register 6 */
|
|
rt_ubase_t s7; /* x23 - s7 - saved register 7 */
|
|
rt_ubase_t s8; /* x24 - s8 - saved register 8 */
|
|
rt_ubase_t s9; /* x25 - s9 - saved register 9 */
|
|
rt_ubase_t s10; /* x26 - s10 - saved register 10 */
|
|
rt_ubase_t s11; /* x27 - s11 - saved register 11 */
|
|
rt_ubase_t t3; /* x28 - t3 - temporary register 3 */
|
|
rt_ubase_t t4; /* x29 - t4 - temporary register 4 */
|
|
rt_ubase_t t5; /* x30 - t5 - temporary register 5 */
|
|
rt_ubase_t t6; /* x31 - t6 - temporary register 6 */
|
|
};
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
struct stack_frame *stack_frame;
|
|
rt_uint8_t *stk;
|
|
int i;
|
|
|
|
stk = stack_addr + sizeof(rt_uint32_t);
|
|
stk = (rt_uint8_t *)RT_ALIGN_DOWN((rt_uint32_t)stk, 8);
|
|
stk -= sizeof(struct stack_frame);
|
|
|
|
stack_frame = (struct stack_frame *)stk;
|
|
|
|
for (i = 0; i < sizeof(struct stack_frame) / sizeof(rt_ubase_t); i++)
|
|
{
|
|
((rt_ubase_t *)stack_frame)[i] = 0xdeadbeef;
|
|
}
|
|
|
|
stack_frame->ra = (rt_ubase_t)texit;
|
|
stack_frame->a0 = (rt_ubase_t)parameter;
|
|
stack_frame->epc = (rt_ubase_t)tentry;
|
|
|
|
// force to machine mode(MPP=11) and set MPIE to 1
|
|
stack_frame->mstatus = 0x00001880;
|
|
|
|
return stk;
|
|
}
|