memio.h

来自「基于ARM核的HMS7202」· C头文件 代码 · 共 32 行

#ifndef __memio_h
#define __memio_h

#define _inw(addr) (*(volatile int *)(addr))
#define _outw(addr, data) ((*(volatile int *)(addr)) = (data))
#define _inb(addr) *(volatile char *)(addr)
#define _outb(addr, data) *(volatile char *)(addr) = data
#ifdef __GNUCC__
static inline short _inh(int addr)
{
	short val;
	__asm__ __volatile("ldr%?h	%0,[%1,#0]"
		: "=&r" (val)
		: "r" (addr));
	return val;
}
static inline void _outh(int addr, short val)
{
	__asm__ __volatile("str%?h	%1,[%0,#0]"
		: :"r" (addr), "r" (val));
}
#else
#define _inh(addr) *(volatile short *)(addr)
#define _outh(addr, data) *(volatile short *)(addr) = data
#endif

#ifndef IO
#define IO(addr) (*((volatile unsigned *) (addr)))
#endif

#endif //__memio_h