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 
_sbus_writeb(unsigned char val,unsigned long addr)18 static inline void _sbus_writeb(unsigned char val, unsigned long addr)
19 {
20 	*(volatile unsigned char *)addr = val;
21 }
22 
_sbus_readb(unsigned long addr)23 static inline unsigned char _sbus_readb(unsigned long addr)
24 {
25 	return *(volatile unsigned char *)addr;
26 }
27 
_sbus_writel(unsigned long val,unsigned long addr)28 static inline void _sbus_writel(unsigned long val, unsigned long addr)
29 {
30 	*(volatile unsigned long *)addr = val;
31 
32 }
33 
_sbus_readl(unsigned long addr)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
46