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rt-thread-official/bsp/fh8620/drivers/interrupt.c

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/*
* This file is part of FH8620 BSP for RT-Thread distribution.
*
* Copyright (c) 2016 Shanghai Fullhan Microelectronics Co., Ltd.
* All rights reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Visit http://www.fullhan.com to get contact with Fullhan.
*
* Change Logs:
* Date Author Notes
*/
/*****************************************************************************
* Include Section
* add all #include here
*****************************************************************************/
#include "interrupt.h"
#include "fh_def.h"
#include "fh_arch.h"
#include "libraries/inc/fh_ictl.h"
/*****************************************************************************
* Define section
* add all #define here
*****************************************************************************/
#define MAX_HANDLERS (NR_INTERNAL_IRQS+NR_EXTERNAL_IRQS)
/****************************************************************************
* ADT section
* add definition of user defined Data Type that only be used in this file here
***************************************************************************/
/******************************************************************************
* Function prototype section
* add prototypes for all functions called by this file,execepting those
* declared in header file
*****************************************************************************/
/*****************************************************************************
* Global variables section - Exported
* add declaration of global variables that will be exported here
* e.g.
* int8_t foo;
****************************************************************************/
extern rt_uint32_t rt_interrupt_nest;
struct rt_irq_desc irq_desc[MAX_HANDLERS];
rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
rt_uint32_t rt_thread_switch_interrupt_flag;
/*****************************************************************************
* Global variables section - Local
* define global variables(will be refered only in this file) here,
* static keyword should be used to limit scope of local variable to this file
* e.g.
* static uint8_t ufoo;
*****************************************************************************/
/* function body */
/*****************************************************************************
* Description:
* add funtion description here
* Parameters:
* description for each argument, new argument starts at new line
* Return:
* what does this function returned?
*****************************************************************************/
rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t vector, void *param)
{
rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
return RT_NULL;
}
/**
* This function will initialize hardware interrupt
*/
void rt_hw_interrupt_init(void)
{
rt_int32_t i;
register rt_uint32_t idx;
fh_intc *p = (fh_intc *)INTC_REG_BASE;
ictl_close_all_isr(p);
/* 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
}
/* init interrupt nest, and context in thread sp */
rt_interrupt_nest = 0;
rt_interrupt_from_thread = 0;
rt_interrupt_to_thread = 0;
rt_thread_switch_interrupt_flag = 0;
}
/**
* This function will mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_mask(int irq)
{
fh_intc *p = (fh_intc *)INTC_REG_BASE;
/* Disable irq on AIC */
ictl_mask_isr(p,irq);
// if (irq < 32)
// p->IRQ_EN_L &= ~(1 << irq);
// else
// p->IRQ_EN_H &= ~(1 << (irq - 32));
}
void rt_hw_interrupt_umask(int irq)
{
fh_intc *p = (fh_intc *)INTC_REG_BASE;
/* Enable irq on AIC */
ictl_unmask_isr(p,irq);
// if (irq < 32)
// p->IRQ_EN_L |= 1 << irq;
// else
// p->IRQ_EN_H |= 1 << (irq - 32);
}
/**
* This function will install a interrupt service routine to a interrupt.
* @param vector the interrupt number
* @param handler the interrupt service routine to be installed
* @param param the interrupt service function parameter
* @param name the interrupt name
* @return old handler
*/
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;
}
#ifdef RT_USING_FINSH
void list_irq(void)
{
#ifdef RT_USING_INTERRUPT_INFO
int irq;
rt_kprintf("number\tcount\tname\n");
for (irq = 0; irq < MAX_HANDLERS; irq++)
{
if (rt_strncmp(irq_desc[irq].name, "default", sizeof("default")))
{
rt_kprintf("%02ld: %10ld %s\n", irq, irq_desc[irq].counter, irq_desc[irq].name);
}
}
#else
rt_kprintf("please open 'RT_USING_INTERRUPT_INFO'\n");
#endif
}
#include <finsh.h>
FINSH_FUNCTION_EXPORT(list_irq, list system irq);
#endif
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