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io.h
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1 /*
2  * OpenRISC Linux
3  *
4  * Linux architectural port borrowing liberally from similar works of
5  * others. All original copyrights apply as per the original source
6  * declaration.
7  *
8  * OpenRISC implementation:
9  * Copyright (C) 2010-2011 Jonas Bonn <[email protected]>
10  * et al.
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or
15  * (at your option) any later version.
16  */
17 
18 #ifndef __ASM_OPENRISC_IO_H
19 #define __ASM_OPENRISC_IO_H
20 
21 /*
22  * PCI: can we really do 0 here if we have no port IO?
23  */
24 #define IO_SPACE_LIMIT 0
25 
26 /* OpenRISC has no port IO */
27 #define HAVE_ARCH_PIO_SIZE 1
28 #define PIO_RESERVED 0X0UL
29 #define PIO_OFFSET 0
30 #define PIO_MASK 0
31 
32 #include <asm-generic/io.h>
33 
34 extern void __iomem *__ioremap(phys_addr_t offset, unsigned long size,
35  pgprot_t prot);
36 
37 static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
38 {
39  return __ioremap(offset, size, PAGE_KERNEL);
40 }
41 
42 /* #define _PAGE_CI 0x002 */
43 static inline void __iomem *ioremap_nocache(phys_addr_t offset,
44  unsigned long size)
45 {
46  return __ioremap(offset, size,
47  __pgprot(pgprot_val(PAGE_KERNEL) | _PAGE_CI));
48 }
49 
50 extern void iounmap(void *addr);
51 #endif