124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2018/10/28 Bernard The unify RISC-V porting code.
|
|
* 2021-02-11 lizhirui add gp support
|
|
*/
|
|
|
|
#include <rthw.h>
|
|
#include <rtthread.h>
|
|
|
|
#include "cpuport.h"
|
|
#include "stack.h"
|
|
|
|
|
|
/**
|
|
* @brief from thread used interrupt context switch
|
|
*
|
|
*/
|
|
volatile rt_ubase_t rt_interrupt_from_thread = 0;
|
|
/**
|
|
* @brief to thread used interrupt context switch
|
|
*
|
|
*/
|
|
volatile rt_ubase_t rt_interrupt_to_thread = 0;
|
|
/**
|
|
* @brief flag to indicate context switch in interrupt or not
|
|
*
|
|
*/
|
|
volatile rt_ubase_t rt_thread_switch_interrupt_flag = 0;
|
|
|
|
|
|
/**
|
|
* 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 rt_hw_stack_frame *frame;
|
|
rt_uint8_t *stk;
|
|
int i;
|
|
extern int __global_pointer$;
|
|
|
|
stk = stack_addr + sizeof(rt_ubase_t);
|
|
stk = (rt_uint8_t *)RT_ALIGN_DOWN((rt_ubase_t)stk, REGBYTES);
|
|
stk -= sizeof(struct rt_hw_stack_frame);
|
|
|
|
frame = (struct rt_hw_stack_frame *)stk;
|
|
|
|
for (i = 0; i < sizeof(struct rt_hw_stack_frame) / sizeof(rt_ubase_t); i++)
|
|
{
|
|
((rt_ubase_t *)frame)[i] = 0xdeadbeef;
|
|
}
|
|
|
|
frame->ra = (rt_ubase_t)texit;
|
|
frame->gp = (rt_ubase_t)&__global_pointer$;
|
|
frame->a0 = (rt_ubase_t)parameter;
|
|
frame->epc = (rt_ubase_t)tentry;
|
|
frame->user_sp_exc_stack = (rt_ubase_t)(((rt_ubase_t)stk) + sizeof(struct rt_hw_stack_frame));
|
|
|
|
#ifndef RISCV_S_MODE
|
|
frame->xstatus = 0x00007880;
|
|
#else
|
|
frame->xstatus = 0x00040120;
|
|
#endif
|
|
|
|
return stk;
|
|
}
|
|
|
|
/*
|
|
* #ifdef RT_USING_SMP
|
|
* void rt_hw_context_switch_interrupt(void *context, rt_ubase_t from, rt_ubase_t to, struct rt_thread *to_thread);
|
|
* #else
|
|
* void rt_hw_context_switch_interrupt(rt_ubase_t from, rt_ubase_t to);
|
|
* #endif
|
|
*/
|
|
#ifndef RT_USING_SMP
|
|
void rt_hw_context_switch_interrupt(rt_ubase_t from, rt_ubase_t to)
|
|
{
|
|
if (rt_thread_switch_interrupt_flag == 0)
|
|
rt_interrupt_from_thread = from;
|
|
|
|
rt_interrupt_to_thread = to;
|
|
rt_thread_switch_interrupt_flag = 1;
|
|
|
|
return ;
|
|
}
|
|
#endif /* end of RT_USING_SMP */
|
|
|
|
/** shutdown CPU */
|
|
void rt_hw_cpu_shutdown()
|
|
{
|
|
rt_uint32_t level;
|
|
rt_kprintf("shutdown...\n");
|
|
|
|
level = rt_hw_interrupt_disable();
|
|
while (level)
|
|
{
|
|
RT_ASSERT(0);
|
|
}
|
|
}
|
|
|
|
rt_thread_t rt_thread_sp_to_thread(void *spmember_addr)
|
|
{
|
|
return (rt_thread_t)(((rt_ubase_t)spmember_addr) - (offsetof(struct rt_thread,sp)));
|
|
}
|
|
|
|
void *get_thread_kernel_stack_top(rt_thread_t thread)
|
|
{
|
|
return (void *)(((rt_size_t)thread -> stack_addr) + ((rt_size_t)thread -> stack_size));
|
|
}
|