rt-thread-official/libcpu/unicore32/sep6200/interrupt.c

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/*
* File : interrupt.c
* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
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*
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* 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.
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*
* Change Logs:
* Date Author Notes
2013-07-17 18:42:19 +08:00
* 2013-7-14 Peng Fan sep6200 implementation
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*/
#include <rtthread.h>
#include <rthw.h>
#include <sep6200.h>
#define MAX_HANDLERS 64
#define SEP6200_IRQ_TYPE 0
#define SEP6200_FIQ_TYPE 1
#define int_enable_all() \
do { \
*(volatile unsigned long*)SEP6200_VIC_INT_EN_L = ~0x0;\
*(volatile unsigned long*)SEP6200_VIC_INT_EN_H = ~0x0;\
}while(0)
#define int_disable_all() \
do { \
*(volatile unsigned long*)SEP6200_VIC_INT_EN_L = 0x0;\
*(volatile unsigned long*)SEP6200_VIC_INT_EN_H = 0x0;\
}while(0)
#define mask_all_int(int_type) \
do { \
if (int_type == SEP6200_IRQ_TYPE){ \
*(volatile unsigned long*)SEP6200_VIC_INT_MSK_ALL = 0x1;\
} else if (int_type == SEP6200_FIQ_TYPE) {\
*(volatile unsigned long*)SEP6200_VIC_INT_MSK_ALL = 0x2;\
}\
}while(0)
#define unmask_all_int(int_type)\
do { \
if (int_type == SEP6200_IRQ_TYPE){ \
*(volatile unsigned long*)SEP6200_VIC_INT_MSK_ALL = ~0x1;\
} else if (int_type == SEP6200_FIQ_TYPE) {\
*(volatile unsigned long*)SEP6200_VIC_INT_MSK_ALL = ~0x2;\
}\
}while(0)
#define SEP6200_INT_SET(intnum) \
do{ \
if(intnum < 32) \
*(volatile unsigned long*)SEP6200_VIC_SFT_INT_L |= (1 << intnum); \
else \
*(volatile unsigned long*)SEP6200_VIC_SFT_INT_H |= (1 << (intnum - 32)); \
}while(0)
#define SEP6200_INT_CLR(intnum) \
do{ \
if(intnum < 32) \
*(volatile unsigned long*)SEP6200_VIC_SFT_INT_L &= ~(1 << intnum);\
else \
*(volatile unsigned long*)SEP6200_VIC_SFT_INT_H &= ~(1 << (intnum - 32)); \
}while(0)
#define SEP6200_INT_ENABLE(intnum)\
do{ \
if(intnum < 32) \
*(volatile unsigned long*)SEP6200_VIC_INT_EN_L |= (1 << intnum); \
else \
*(volatile unsigned long*)SEP6200_VIC_INT_EN_H |= (1 << (intnum - 32)); \
}while(0)
#define SEP6200_INT_DISABLE(intnum) \
do{ \
if(intnum < 32) \
*(volatile unsigned long*)SEP6200_VIC_INT_EN_L &= ~(1 << intnum); \
else \
*(volatile unsigned long*)SEP6200_VIC_INT_EN_H &= ~(1 << (intnum - 32)); \
}while(0)
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;
/* --------------------------------------------------------------------
* Interrupt initialization
* -------------------------------------------------------------------- */
/**
* @addtogroup sep6200
*/
/*@{*/
void rt_hw_interrupt_mask(int irq);
void rt_hw_interrupt_umask(int irq);
rt_inline void sep6200_irq_enable(rt_uint32_t irq)
{
SEP6200_INT_ENABLE(irq);
}
rt_inline void sep6200_irq_disable(rt_uint32_t irq)
{
SEP6200_INT_DISABLE(irq);
}
rt_inline void sep6200_irq_unmask(rt_uint32_t irq)
{
SEP6200_INT_ENABLE(irq);
}
rt_inline void sep6200_irq_mask(rt_uint32_t irq)
{
SEP6200_INT_DISABLE(irq);
}
rt_isr_handler_t rt_hw_interrupt_handle(rt_uint32_t vector)
{
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;
/* init exceptions table */
for(idx=0; idx < MAX_HANDLERS; idx++)
{
isr_table[idx].handler = (rt_isr_handler_t)rt_hw_interrupt_handle;
}
int_disable_all();
mask_all_int(SEP6200_FIQ_TYPE);
//int_enable_all();
unmask_all_int(SEP6200_IRQ_TYPE);
/* 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)
{
if (irq >= MAX_HANDLERS) {
rt_kprintf("Wrong irq num to mask\n");
} else {
sep6200_irq_mask(irq);
}
}
/**
* This function will un-mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_umask(int irq)
{
if (irq >= MAX_HANDLERS) {
rt_kprintf("Wrong irq num to unmask\n");
} else {
sep6200_irq_unmask(irq);
}
}
/**
* 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, 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;
}
/*@}*/