69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
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/*
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* Copyright (c) 2018, Synopsys, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <rtthread.h>
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#include "inc/arc/arc_exception.h"
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/* enable interrupt and set interrupt priority mask */
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#define ARC_INIT_STATUS (AUX_STATUS_MASK_IE | ((-1 - INT_PRI_MIN) << 1))
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extern void start_r(void);
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rt_uint32_t context_switch_reqflg;
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rt_uint32_t rt_interrupt_from_thread;
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rt_uint32_t rt_interrupt_to_thread;
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struct init_stack_frame {
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rt_uint32_t pc;
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rt_uint32_t blink;
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rt_uint32_t task;
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rt_uint32_t status32;
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rt_uint32_t r0;
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};
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/**
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* shutdown CPU
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*/
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void rt_hw_cpu_shutdown(void)
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{
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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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struct init_stack_frame *stack_frame;
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rt_uint8_t *stk;
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stk = stack_addr + sizeof(rt_uint32_t);
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stk = (rt_uint8_t *)RT_ALIGN_DOWN((rt_uint32_t)stk, 8);
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stk -= sizeof(struct init_stack_frame);
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stack_frame = (struct init_stack_frame *)stk;
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stack_frame->pc = (rt_uint32_t)start_r;
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stack_frame->blink = (rt_uint32_t)texit;
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stack_frame->task = (rt_uint32_t)tentry;
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stack_frame->status32 = ARC_INIT_STATUS;
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stack_frame->r0 = (rt_uint32_t)parameter;
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return stk;
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}
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/**
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* This function set the hook, which is invoked on fault exception handling.
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*
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* @param exception_handle the exception handling hook function.
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*/
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void rt_hw_exception_install(rt_err_t (*exception_handle)(void *context))
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{
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exception_handle = exception_handle;
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}
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