arch/m68k/include/asm/sbus.h

   1 /*
   2  * some sbus structures and macros to make usage of sbus drivers possible
   3  */
   4
   5 #ifndef __M68K_SBUS_H
   6 #define __M68K_SBUS_H
   7
   8 struct sbus_dev {
   9         struct {
  10                 unsigned int which_io;
  11                 unsigned int phys_addr;
  12         } reg_addrs[1];
  13 };
  14
  15 /* sbus IO functions stolen from include/asm-sparc/io.h for the serial driver */
  16 /* No SBUS on the Sun3, kludge -- sam */
  17
  18 static inline void _sbus_writeb(unsigned char val, unsigned long addr)
  19 {
  20         *(volatile unsigned char *)addr = val;
  21 }
  22
  23 static inline unsigned char _sbus_readb(unsigned long addr)
  24 {
  25         return *(volatile unsigned char *)addr;
  26 }
  27
  28 static inline void _sbus_writel(unsigned long val, unsigned long addr)
  29 {
  30         *(volatile unsigned long *)addr = val;
  31
  32 }
  33
  34 extern inline unsigned long _sbus_readl(unsigned long addr)
  35 {
  36         return *(volatile unsigned long *)addr;
  37 }
  38
  39
  40 #define sbus_readb(a) _sbus_readb((unsigned long)a)
  41 #define sbus_writeb(v, a) _sbus_writeb(v, (unsigned long)a)
  42 #define sbus_readl(a) _sbus_readl((unsigned long)a)
  43 #define sbus_writel(v, a) _sbus_writel(v, (unsigned long)a)
  44
  45 #endif