aboutsummaryrefslogtreecommitdiff
path: root/include/asm-um/io.h
blob: 90674056dcef4592fd65ab25375531884a2f6e4a (plain)
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
#ifndef __UM_IO_H
#define __UM_IO_H

#include "asm/page.h"

#define IO_SPACE_LIMIT 0xdeadbeef /* Sure hope nothing uses this */

static inline int inb(unsigned long i) { return(0); }
static inline void outb(char c, unsigned long i) { }

/*
 * Change virtual addresses to physical addresses and vv.
 * These are pretty trivial
 */
static inline unsigned long virt_to_phys(volatile void * address)
{
	return __pa((void *) address);
}

static inline void * phys_to_virt(unsigned long address)
{
	return __va(address);
}

/*
 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 * access
 */
#define xlate_dev_mem_ptr(p)	__va(p)

/*
 * Convert a virtual cached pointer to an uncached pointer
 */
#define xlate_dev_kmem_ptr(p)	p

#endif