io.h

来自「Intel PXA270的bootloader程序,在linux环境下运行的.」· C头文件 代码 · 共 33 行

#ifndef _IO_H
#define _IO_H

#define readb(c)			(*(volatile uint8  *)(c))
#define readw(c)			(*(volatile uint16 *)(c))
#define readl(c)			(*(volatile uint32 *)(c))

#define writeb(v, c)		(*(volatile uint8  *)(c) = (v))
#define writew(v, c)		(*(volatile uint16 *)(c) = (v))
#define writel(v, c)		(*(volatile uint32 *)(c) = (v))

#define __io(a)				(a)

#define inb(p)				readb(__io(p))
#define inw(p)				readw(__io(p))
#define inl(p)				readl(__io(p))

#define outb(v, p)			writeb(v, __io(p))
#define outw(v, p)			writew(v, __io(p))
#define outl(v, p)			writel(v, __io(p))

#define insb(p, d, cnt)		({ int c=cnt; uint8  *s=(uint8 *)(d);  while (c--) *s++ = inb(p); })
#define insw(p, d, cnt)		({ int c=cnt; uint16 *s=(uint16 *)(d); while (c--) *s++ = inw(p); })
#define insl(p, d, cnt)		({ int c=cnt; uint32 *s=(uint32 *)(d); while (c--) *s++ = inl(p); })

#define outsb(p, d, cnt)	({ int c=cnt; uint8  *s=(uint8  *)(d); while (c--) outb(*s++, p); })
#define outsw(p, d, cnt)	({ int c=cnt; uint16 *s=(uint16 *)(d); while (c--) outw(*s++, p); })
#define outsl(p, d, cnt)	({ int c=cnt; uint32 *s=(uint32 *)(d); while (c--) outl(*s++, p); })

#endif