include/asm-m68k/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 #define ARCH_SUN4  0
  16
  17 /* sbus IO functions stolen from include/asm-sparc/io.h for the serial driver */
  18 /* No SBUS on the Sun3, kludge -- sam */
  19
  20 static inline void _sbus_writeb(unsigned char val, unsigned long addr)
  21 {
  22         *(volatile unsigned char *)addr = val;
  23 }
  24
  25 static inline unsigned char _sbus_readb(unsigned long addr)
  26 {
  27         return *(volatile unsigned char *)addr;
  28 }
  29
  30 static inline void _sbus_writel(unsigned long val, unsigned long addr)
  31 {
  32         *(volatile unsigned long *)addr = val;
  33
  34 }
  35
  36 extern inline unsigned long _sbus_readl(unsigned long addr)
  37 {
  38         return *(volatile unsigned long *)addr;
  39 }
  40
  41
  42 #define sbus_readb(a) _sbus_readb((unsigned long)a)
  43 #define sbus_writeb(v, a) _sbus_writeb(v, (unsigned long)a)
  44 #define sbus_readl(a) _sbus_readl((unsigned long)a)
  45 #define sbus_writel(v, a) _sbus_writel(v, (unsigned long)a)
  46
  47 #endif