bios_io.h

linux下面直接读硬盘扇区的程序

#ifndef BIOS_IO_H
#define BIOS_IO_H

#define outb(value,port) __asm__ ("outb %%al,%%dx"::"a" (value),"d" (port))
#define inb(port) ({ unsigned char _v; __asm__ volatile ("inb %%dx,%%al":"=a" (_v):"d" (port)); _v; })

#define outb_p(value,port) \
__asm__ ("outb %%al,%%dx\n" \
		"\tjmp 1f\n" \
		"1:\tjmp 1f\n" \
		"1:"::"a" (value),"d" (port))
#define inb_p(port) ({ \
unsigned char _v; \
__asm__ volatile ("inb %%dx,%%al\n" \
	"\tjmp 1f\n" \
	"1:\tjmp 1f\n" \
	"1:":"=a" (_v):"d" (port)); \
_v; \
})

#define cli() __asm__("cli\n");
#define sti() __asm__("sti\n");

#endif /* BIOS_IO_H */