orig-floppy.c

用于汇编领域的,运用于OS的MAIN函数.基于硬件基础的源代码

#include "hos.h"

static void reset_fdc(Fdc *fdc){
   unsigned int k;
   volatile int irq_timeout = 0;
   int irq_timeout_event;

   outp(fdc->base_port + FDC_DOR, 0); // stop the motor and disable IRQ
   outp(fdc->base_port + FDC_DOR, 0x0C);// re-enable IRQ/DMA
   fdc-dor = 0x0C;
   // resetting triggered 4 interrupts. handle them
   irq_timeout_event=fd32_event_post(default_drive_params[0].int_tmout, irq_timeout_cb, (void *) &irq_timeout);


void floppy_isr(void);

void floppy_handler(void)
{
    printk("in floppy handler\n");
	for(;;);
	outbyte(0x20, 0x20);	/* EOI to Master */
	outbyte(0xA0, 0x20);	/* EOI to Slave */
}

void init_floppy(void)
{
    // some fdc init here

    // and setting IDT
	set_intr_gate(0x25, &floppy_isr);

	unmask_irq(6);
}