You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
2.5 KiB
98 lines
2.5 KiB
/*
|
|
* Copyright (c) 2020, Shenzhen Academy of Aerospace Technology
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2020-10-16 Dystopia the first version
|
|
*/
|
|
|
|
#include <rthw.h>
|
|
#include <rtthread.h>
|
|
|
|
#include "bm3803.h"
|
|
#include "interrupt.h"
|
|
|
|
#define MAX_HANDLERS 256
|
|
|
|
extern volatile rt_uint8_t rt_interrupt_nest;
|
|
struct rt_irq_desc isr_table[MAX_HANDLERS];
|
|
rt_uint32_t rt_interrupt_from_thread;
|
|
rt_uint32_t rt_interrupt_to_thread;
|
|
rt_uint32_t rt_thread_switch_interrupt_flag;
|
|
|
|
/**
|
|
* This function will initialize hardware interrupt
|
|
*/
|
|
void rt_hw_interrupt_init(void)
|
|
{
|
|
/* init exceptions table */
|
|
rt_memset(isr_table, 0x00, sizeof(isr_table));
|
|
|
|
/* 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)
|
|
{
|
|
if (vector > 0x1F || vector < 0x11)
|
|
return;
|
|
volatile struct lregs *regs = (struct lregs *)PREGS;
|
|
regs->irqmask &= ~(1 << (vector - 0x10));
|
|
}
|
|
|
|
/**
|
|
* This function will un-mask a interrupt.
|
|
* @param vector the interrupt number
|
|
*/
|
|
void rt_hw_interrupt_umask(int vector)
|
|
{
|
|
if (vector > 0x1F || vector < 0x11)
|
|
return;
|
|
volatile struct lregs *regs = (struct lregs *)PREGS;
|
|
regs->irqmask |= 1 << (vector - 0x10);
|
|
}
|
|
|
|
/**
|
|
* 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 && vector >= 0)
|
|
{
|
|
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;
|
|
}
|
|
|
|
void rt_hw_interrupt_clear(int vector)
|
|
{
|
|
if (vector > 0x1F || vector < 0x11)
|
|
return;
|
|
volatile struct lregs *regs = (struct lregs *)PREGS;
|
|
regs->irqclear |= 1 << (vector - 0x10);
|
|
}
|
|
|