rt-thread/libcpu/arm/s3c24x0/interrupt.c

129 lines
2.9 KiB
C
Raw Normal View History

/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2006-03-13 Bernard first version
* 2013-03-29 aozima Modify the interrupt interface implementations.
*/
#include <rtthread.h>
#include <rthw.h>
#include "s3c24x0.h"
#define MAX_HANDLERS 32
extern rt_uint32_t rt_interrupt_nest;
/* exception and interrupt handler table */
struct rt_irq_desc isr_table[MAX_HANDLERS];
rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
rt_uint32_t rt_thread_switch_interrupt_flag;
/**
* @addtogroup S3C24X0
*/
/*@{*/
static void rt_hw_interrupt_handle(int vector, void *param)
{
rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
}
/**
* This function will initialize hardware interrupt
*/
void rt_hw_interrupt_init(void)
{
register rt_uint32_t idx;
/* all clear source pending */
SRCPND = 0x0;
/* all clear sub source pending */
SUBSRCPND = 0x0;
/* all=IRQ mode */
INTMOD = 0x0;
/* all interrupt disabled include global bit */
INTMSK = BIT_ALLMSK;
/* all sub interrupt disable */
INTSUBMSK = BIT_SUB_ALLMSK;
/* all clear interrupt pending */
INTPND = BIT_ALLMSK;
/* init exceptions table */
rt_memset(isr_table, 0x00, sizeof(isr_table));
for(idx=0; idx < MAX_HANDLERS; idx++)
{
isr_table[idx].handler = rt_hw_interrupt_handle;
}
/* 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 vector)
{
INTMSK |= 1 << vector;
}
/**
* This function will un-mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_umask(int vector)
{
if (vector == INTNOTUSED6)
{
rt_kprintf("Interrupt vec %d is not used!\n", vector);
// while(1);
}
else if (vector == INTGLOBAL)
INTMSK = 0x0;
else
INTMSK &= ~(1 << 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 = isr_table[vector].handler;
if (handler != RT_NULL)
{
#ifdef RT_USING_INTERRUPT_INFO
rt_strncpy(isr_table[vector].name, name, RT_NAME_MAX);
#endif /* RT_USING_INTERRUPT_INFO */
isr_table[vector].handler = handler;
isr_table[vector].param = param;
}
}
return old_handler;
}
/*@}*/