rt-thread/libcpu/mips/jz47xx/interrupt.c

134 lines
3.1 KiB
C

/*
* File : interrupt.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2010, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2010-07-09 Bernard first version
*/
#include <rthw.h>
#include "jz47xx.h"
#define JZ47XX_MAX_INTR 32
extern rt_uint32_t rt_interrupt_nest;
rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
rt_uint32_t rt_thread_switch_interrupt_flag;
static struct rt_irq_desc irq_handle_table[JZ47XX_MAX_INTR];
/**
* @addtogroup Jz47xx
*/
/*@{*/
void rt_hw_interrupt_handler(int vector)
{
rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
}
/**
* This function will initialize hardware interrupt
*/
void rt_hw_interrupt_init()
{
rt_int32_t index;
rt_memset(irq_handle_table, 0x00, sizeof(irq_handle_table));
for (index = 0; index < JZ47XX_MAX_INTR; index ++)
{
irq_handle_table[index].handler = (rt_isr_handler_t)rt_hw_interrupt_handler;
}
/* 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)
{
/* mask interrupt */
INTC_IMSR = (1 << vector);
}
/**
* This function will un-mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_umask(int vector)
{
INTC_IMCR = (1 << vector);
}
/**
* 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,
char *name)
{
rt_isr_handler_t old_handler = RT_NULL;
if (vector >= 0 && vector < JZ47XX_MAX_INTR)
{
old_handler = irq_handle_table[vector].handler;
#ifdef RT_USING_INTERRUPT_INFO
rt_strncpy(irq_handle_table[vector].name, name, RT_NAME_MAX);
#endif /* RT_USING_INTERRUPT_INFO */
irq_handle_table[vector].handler = handler;
irq_handle_table[vector].param = param;
}
return old_handler;
}
void rt_interrupt_dispatch(void *ptreg)
{
int i;
rt_isr_handler_t irq_func;
static rt_uint32_t pending = 0;
/* the hardware interrupt */
pending |= INTC_IPR;
if (!pending) return;
for (i = JZ47XX_MAX_INTR; i > 0; --i)
{
if ((pending & (1<<i)))
{
pending &= ~(1<<i);
irq_func = irq_handle_table[i].handler;
/* do interrupt */
(*irq_func)(i, irq_handle_table[i].param);
#ifdef RT_USING_INTERRUPT_INFO
irq_handle_table[i].counter++;
#endif /* RT_USING_INTERRUPT_INFO */
/* ack interrupt */
INTC_IPR = (1 << i);
}
}
}
/*@}*/