www.pudn.com > linux011.rar > io.h

//// 硬件端口字节输出函数。
// 参数：value - 欲输出字节；port - 端口。 
#define outb(value,port) _outb((unsigned char)(value),(unsigned short)(port))
void _inline _outb(unsigned char value,unsigned short port) //passed 
{ 
	_asm mov dx,port ; 
	_asm mov al,value ; 
	_asm out dx,al ; 
}
//__asm__ ( "outb %%al,%%dx":: "a" (value), "d" (port))


//// 硬件端口字节输入函数。
// 参数：port - 端口。返回读取的字节。 
#define inb(port) _inb((unsigned short)(port))
unsigned char _inline _inb(unsigned short port)  
{  
//	unsigned char _v;  
	_asm mov dx,port ; 
	_asm in al,dx ; 
//	_asm mov _v,al ; 
//	return _v; 
} 
/*
unsigned char _v; \
__asm__ volatile ( "inb %%dx,%%al": "=a" (_v): "d" (port)); \
_v; \
})*/

//// 带延迟的硬件端口字节输出函数。
// 参数：value - 欲输出字节；port - 端口。
/* 
#define outb_p(value,port) \ 
_asm {\ 
	_asm mov al,value \ 
	_asm mov dx,port \ 
	_asm out dx,al \ 
	_asm jmp l1 \ 
_asm l1: jmp l2 \ 
_asm l2: \ 
} 
__asm__ ( "outb %%al,%%dx\n" \
"\tjmp 1f\n" \
"1:\tjmp 1f\n" \
"1:":: "a" (value), "d" (port)) 
*/ 
#define outb_p(value,port) _outb_p((unsigned char)(value),(unsigned short)(port)) 
_inline void _outb_p(unsigned char value, unsigned short port) 
{ 
	_asm mov al,value  
	_asm mov dx,port  
	_asm out dx,al  
	_asm jmp l1  
	_asm l1: jmp l2  
	_asm l2:  
} 

//// 带延迟的硬件端口字节输入函数。
// 参数：port - 端口。返回读取的字节。
/* 
#define inb_p(port) { \ 
volatile unsigned char _v; \ 
_asm { \ 
	_asm mov dx,port \ 
	_asm in al,dx \ 
	_asm mov _v,al \ 
	_asm jmp l1 \ 
_asm l1: jmp l2 \ 
_asm l2: \ 
} \ 
_v; \ 
} 
unsigned char _v; \
__asm__ volatile ( "inb %%dx,%%al\n" \
"\tjmp 1f\n" \
"1:\tjmp 1f\n" \
"1:": "=a" (_v): "d" (port)); \
_v; \
})*/ 
#define inb_p(port) _inb_p((unsigned short)(port)) 
_inline unsigned char _inb_p(unsigned short port) 
{ 
//	volatile unsigned char _v;  
	_asm {  
		mov dx,port  
		in al,dx  
//		mov _v,al  
		jmp l1  
	l1: jmp l2  
	l2:  
	} 
//	return _v; 
}