1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
#ifndef _M68K_IO_H
#define _M68K_IO_H
static inline unsigned char get_user_byte_io(const char * addr)
{
register unsigned char _v;
__asm__ __volatile__ ("moveb %1,%0":"=dm" (_v):"m" (*addr));
return _v;
}
#define inb_p(addr) get_user_byte_io((char *)(addr))
#define inb(addr) get_user_byte_io((char *)(addr))
static inline void put_user_byte_io(char val,char *addr)
{
__asm__ __volatile__ ("moveb %0,%1"
: /* no outputs */
:"idm" (val),"m" (*addr)
: "memory");
}
#define outb_p(x,addr) put_user_byte_io((x),(char *)(addr))
#define outb(x,addr) put_user_byte_io((x),(char *)(addr))
/*
* Change virtual addresses to physical addresses and vv.
* These are trivial on the 1:1 Linux/i386 mapping (but if we ever
* make the kernel segment mapped at 0, we need to do translation
* on the i386 as well)
*/
extern unsigned long mm_vtop(unsigned long addr);
extern unsigned long mm_ptov(unsigned long addr);
extern inline unsigned long virt_to_phys(volatile void * address)
{
return (unsigned long) mm_vtop((unsigned long)address);
}
extern inline void * phys_to_virt(unsigned long address)
{
return (void *) mm_ptov(address);
}
/*
* IO bus memory addresses are also 1:1 with the physical address
*/
#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt
#endif /* _M68K_IO_H */
|
