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131 lines
3.0 KiB
131 lines
3.0 KiB
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2015/9/15 Bernard Update to new interrupt framework.
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <bsp.h>
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extern void rt_hw_idt_init(void);
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/* exception and interrupt handler table */
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struct rt_irq_desc irq_desc[MAX_HANDLERS];
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rt_uint16_t irq_mask_8259A = 0xFFFF;
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void rt_hw_interrupt_handle(int vector, void* param);
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/**
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* @addtogroup I386
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*/
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/*@{*/
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/**
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* This function initializes 8259 interrupt controller
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*/
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void rt_hw_pic_init()
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{
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outb(IO_PIC1, 0x11);
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outb(IO_PIC1+1, IRQ_OFFSET);
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outb(IO_PIC1+1, 1<<IRQ_SLAVE);
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outb(IO_PIC1+1, 0x3);
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outb(IO_PIC1+1, 0xff);
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outb(IO_PIC1, 0x68);
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outb(IO_PIC1, 0x0a);
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outb(IO_PIC2, 0x11);
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outb(IO_PIC2+1, IRQ_OFFSET + 8);
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outb(IO_PIC2+1, IRQ_SLAVE);
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outb(IO_PIC2+1, 0x3);
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outb(IO_PIC2+1, 0xff);
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outb(IO_PIC2, 0x68);
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outb(IO_PIC2, 0x0a);
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if (irq_mask_8259A != 0xFFFF)
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{
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outb(IO_PIC1+1, (char)irq_mask_8259A);
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outb(IO_PIC2+1, (char)(irq_mask_8259A >> 8));
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}
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}
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void rt_hw_interrupt_handle(int vector, void* param)
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{
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rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
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}
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void rt_hw_isr(int vector)
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{
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if (vector < MAX_HANDLERS)
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{
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irq_desc[vector].handler(vector, irq_desc[vector].param);
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}
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}
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/**
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* This function initializes interrupt descript table and 8259 interrupt controller
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*
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*/
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void rt_hw_interrupt_init(void)
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{
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int idx;
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rt_hw_idt_init();
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rt_hw_pic_init();
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/* init exceptions table */
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for(idx=0; idx < MAX_HANDLERS; idx++)
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{
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irq_desc[idx].handler = (rt_isr_handler_t)rt_hw_interrupt_handle;
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irq_desc[idx].param = RT_NULL;
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#ifdef RT_USING_INTERRUPT_INFO
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rt_snprintf(irq_desc[idx].name, RT_NAME_MAX - 1, "default");
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irq_desc[idx].counter = 0;
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#endif
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}
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}
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void rt_hw_interrupt_umask(int vector)
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{
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irq_mask_8259A = irq_mask_8259A&~(1<<vector);
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outb(IO_PIC1+1, (char)irq_mask_8259A);
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outb(IO_PIC2+1, (char)(irq_mask_8259A >> 8));
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}
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void rt_hw_interrupt_mask(int vector)
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{
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irq_mask_8259A = irq_mask_8259A | (1<<vector);
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outb(IO_PIC1+1, (char)irq_mask_8259A);
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outb(IO_PIC2+1, (char)(irq_mask_8259A >> 8));
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}
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rt_isr_handler_t rt_hw_interrupt_install(int vector,
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rt_isr_handler_t handler,
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void *param,
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const char *name)
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{
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rt_isr_handler_t old_handler = RT_NULL;
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if(vector < MAX_HANDLERS)
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{
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old_handler = irq_desc[vector].handler;
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if (handler != RT_NULL)
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{
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irq_desc[vector].handler = (rt_isr_handler_t)handler;
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irq_desc[vector].param = param;
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#ifdef RT_USING_INTERRUPT_INFO
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rt_snprintf(irq_desc[vector].name, RT_NAME_MAX - 1, "%s", name);
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irq_desc[vector].counter = 0;
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#endif
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}
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}
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return old_handler;
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}
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/*@}*/
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