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/*
* File : trap.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, 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://openlab.rt-thread.com/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2008-12-11 XuXinming first version
* 2013-03-29 aozima Modify the interrupt interface implementations.
*/
#include <rtthread.h>
#include <rthw.h>
#include <sys_vim.h>
#include <system.h>
#include "armv7.h"
#define MAX_HANDLERS 96
/* exception and interrupt handler table */
struct rt_irq_desc irq_desc[MAX_HANDLERS];
extern volatile rt_uint8_t rt_interrupt_nest;
/* exception and interrupt handler table */
rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
rt_uint32_t rt_thread_switch_interrupt_flag;
/**
* @addtogroup RM48x50
*/
/*@{*/
static void rt_hw_int_not_handle(int vector, void *param)
{
rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
}
#define vimRAM (0xFFF82000U)
void rt_hw_interrupt_init(void)
{
register int i;
rt_uint32_t *vect_addr;
/* the initialization is done in sys_startup.c */
/* init exceptions table */
rt_memset(irq_desc, 0x00, sizeof(irq_desc));
for(i=0; i < MAX_HANDLERS; i++)
{
irq_desc[i].handler = rt_hw_int_not_handle;
vect_addr = (rt_uint32_t *)(vimRAM + i*4);
*vect_addr = (rt_uint32_t)&irq_desc[i];
}
/* 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;
}
void rt_hw_interrupt_mask(int vector)
{
vimDisableInterrupt(vector);
}
void rt_hw_interrupt_umask(int vector)
{
vimEnableInterrupt(vector, SYS_IRQ);
}
/**
* 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 parameter for interrupt service routine
* @name unused.
*
* @return the 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 < MAX_HANDLERS)
{
old_handler = irq_desc[vector].handler;
if (handler != RT_NULL)
{
irq_desc[vector].handler = handler;
irq_desc[vector].param = param;
}
}
return old_handler;
}
/*@}*/
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