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