68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/*
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* Copyright (c) 2020-2020, Bluetrum Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2020/11/18 greedyhao Bluetrum RISC-V porting code.
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*/
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#include <rthw.h>
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#include <rtthread.h>
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volatile rt_ubase_t rt_interrupt_from_thread = 0;
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volatile rt_ubase_t rt_interrupt_to_thread = 0;
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volatile rt_uint32_t rt_thread_switch_interrupt_flag = 0;
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rt_uint32_t rt_cur_thread_sp = 0;
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/**
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* This function will initialize thread stack
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*
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* @param tentry the entry of thread
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* @param parameter the parameter of entry
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* @param stack_addr the beginning stack address
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* @param texit the function will be called when thread exit
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*
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* @return stack address
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*/
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rt_uint8_t *rt_hw_stack_init(void *tentry,
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void *parameter,
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rt_uint8_t *stack_addr,
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void *texit)
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{
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rt_uint32_t *stk;
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register int *tp asm("x3");
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stack_addr += sizeof(rt_uint32_t);
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stack_addr = (rt_uint8_t *)RT_ALIGN_DOWN((rt_uint32_t)stack_addr, 8);
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stk = (rt_uint32_t *)stack_addr;
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stk--;
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*stk = (rt_uint32_t)0x10003; /* Start address */
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stk--;
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*stk = (rt_uint32_t)tentry; /* Start address */
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stk -= 22;
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*stk = (rt_uint32_t)parameter; /* Register a0 parameter*/
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stk -= 6;
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*stk = (rt_uint32_t)tp; /* Register thread pointer */
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stk --;
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*stk = (rt_uint32_t)texit; /* Register ra texit*/
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/* return task's current stack address */
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return (rt_uint8_t *)stk;
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}
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/** shutdown CPU */
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void rt_hw_cpu_shutdown(void)
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{
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rt_uint32_t level;
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rt_kprintf("shutdown...\n");
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level = rt_hw_interrupt_disable();
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while (level)
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{
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RT_ASSERT(0);
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}
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}
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