107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*
|
||
|
|
* 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, const 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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*@}*/
|