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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018/10/01 Bernard The first version
* 2018/12/27 Jesven Change irq enable/disable to cpu0
*/
#include <plic.h>
#include <mmu.h>
#include "tick.h"
#include "encoding.h"
#include "riscv.h"
#include "interrupt.h"
struct rt_irq_desc irq_desc[MAX_HANDLERS];
static rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t vector, void *param)
{
rt_kprintf("UN-handled interrupt %d occurred!!!\n", vector);
return RT_NULL;
}
int rt_hw_plic_irq_enable(int irq_number)
{
plic_irq_enable(irq_number);
return 0;
}
int rt_hw_plic_irq_disable(int irq_number)
{
plic_irq_disable(irq_number);
return 0;
}
/**
* This function will un-mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_umask(int vector)
{
plic_set_priority(vector, 1);
rt_hw_plic_irq_enable(vector);
}
/**
* This function will install a interrupt service routine to a interrupt.
* @param vector the interrupt number
* @param new_handler the interrupt service routine to be installed
* @param old_handler the old interrupt service routine
*/
rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
void *param, const char *name)
{
rt_isr_handler_t old_handler = RT_NULL;
if(vector < MAX_HANDLERS)
{
old_handler = irq_desc[vector].handler;
if (handler != RT_NULL)
{
irq_desc[vector].handler = (rt_isr_handler_t)handler;
irq_desc[vector].param = param;
#ifdef RT_USING_INTERRUPT_INFO
rt_snprintf(irq_desc[vector].name, RT_NAME_MAX - 1, "%s", name);
irq_desc[vector].counter = 0;
#endif
}
}
return old_handler;
}
void rt_hw_interrupt_init()
{
/* Enable machine external interrupts. */
// set_csr(sie, SIP_SEIP);
int idx = 0;
/* init exceptions table */
for (idx = 0; idx < MAX_HANDLERS; idx++)
{
irq_desc[idx].handler = (rt_isr_handler_t)rt_hw_interrupt_handle;
irq_desc[idx].param = RT_NULL;
#ifdef RT_USING_INTERRUPT_INFO
rt_snprintf(irq_desc[idx].name, RT_NAME_MAX - 1, "default");
irq_desc[idx].counter = 0;
#endif
}
plic_set_threshold(0);
}
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