134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2006-2024, 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"
|
|
#include <sbi.h>
|
|
#include <encoding.h>
|
|
|
|
#define K_SSTATUS_DEFAULT (SSTATUS_SPP | SSTATUS_SPIE | SSTATUS_SUM | SSTATUS_FS)
|
|
|
|
/**
|
|
* @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;
|
|
|
|
void *_rt_hw_stack_init(rt_ubase_t *sp, rt_ubase_t ra, rt_ubase_t sstatus)
|
|
{
|
|
(*--sp) = 0; /* tp */
|
|
(*--sp) = ra; /* ra */
|
|
(*--sp) = 0; /* s0(fp) */
|
|
(*--sp) = 0; /* s1 */
|
|
(*--sp) = 0; /* s2 */
|
|
(*--sp) = 0; /* s3 */
|
|
(*--sp) = 0; /* s4 */
|
|
(*--sp) = 0; /* s5 */
|
|
(*--sp) = 0; /* s6 */
|
|
(*--sp) = 0; /* s7 */
|
|
(*--sp) = 0; /* s8 */
|
|
(*--sp) = 0; /* s9 */
|
|
(*--sp) = 0; /* s10 */
|
|
(*--sp) = 0; /* s11 */
|
|
(*--sp) = sstatus; /* sstatus */
|
|
--sp; /* align to 16bytes */
|
|
|
|
return (void *)sp;
|
|
}
|
|
|
|
int rt_hw_cpu_id(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* This function will initialize thread stack, we assuming
|
|
* when scheduler restore this new thread, context will restore
|
|
* an entry to user first application
|
|
*
|
|
* s0-s11, ra, sstatus, a0
|
|
* @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_ubase_t *sp = (rt_ubase_t *)stack_addr;
|
|
// we use a strict alignment requirement for Q extension
|
|
sp = (rt_ubase_t *)RT_ALIGN_DOWN((rt_ubase_t)sp, 16);
|
|
|
|
(*--sp) = (rt_ubase_t)tentry;
|
|
(*--sp) = (rt_ubase_t)parameter;
|
|
(*--sp) = (rt_ubase_t)texit;
|
|
|
|
/* compatible to RESTORE_CONTEXT */
|
|
extern void _rt_thread_entry(void);
|
|
return (rt_uint8_t *)_rt_hw_stack_init(sp, (rt_ubase_t)_rt_thread_entry, K_SSTATUS_DEFAULT);
|
|
}
|
|
|
|
/*
|
|
* #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, rt_thread_t from_thread, rt_thread_t to_thread)
|
|
{
|
|
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(void)
|
|
{
|
|
rt_uint32_t level;
|
|
rt_kprintf("shutdown...\n");
|
|
|
|
level = rt_hw_interrupt_disable();
|
|
|
|
sbi_shutdown();
|
|
|
|
while (1)
|
|
;
|
|
}
|
|
|
|
void rt_hw_set_process_id(int pid)
|
|
{
|
|
// TODO
|
|
}
|