blob: cb1d8fd2b16b22554b32625fadbc31d7bcd6c207 (
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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*
* linux/arch/unicore32/include/asm/io.h
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Copyright (C) 2001-2010 GUAN Xue-tao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __UNICORE_IO_H__
#define __UNICORE_IO_H__
#ifdef __KERNEL__
#include <asm/byteorder.h>
#include <asm/memory.h>
#define PCI_IOBASE PKUNITY_PCILIO_BASE
#include <asm-generic/io.h>
/*
* __uc32_ioremap and __uc32_ioremap_cached takes CPU physical address.
*/
extern void __iomem *__uc32_ioremap(unsigned long, size_t);
extern void __iomem *__uc32_ioremap_cached(unsigned long, size_t);
extern void __uc32_iounmap(volatile void __iomem *addr);
/*
* ioremap and friends.
*
* ioremap takes a PCI memory address, as specified in
* Documentation/io-mapping.txt.
*
*/
#define ioremap(cookie, size) __uc32_ioremap(cookie, size)
#define ioremap_cached(cookie, size) __uc32_ioremap_cached(cookie, size)
#define ioremap_nocache(cookie, size) __uc32_ioremap(cookie, size)
#define iounmap(cookie) __uc32_iounmap(cookie)
#define readb_relaxed readb
#define readw_relaxed readw
#define readl_relaxed readl
#define HAVE_ARCH_PIO_SIZE
#define PIO_OFFSET (unsigned int)(PCI_IOBASE)
#define PIO_MASK (unsigned int)(IO_SPACE_LIMIT)
#define PIO_RESERVED (PIO_OFFSET + PIO_MASK + 1)
#ifdef CONFIG_STRICT_DEVMEM
#include <linux/ioport.h>
#include <linux/mm.h>
/*
* devmem_is_allowed() checks to see if /dev/mem access to a certain
* address is valid. The argument is a physical page number.
* We mimic x86 here by disallowing access to system RAM as well as
* device-exclusive MMIO regions. This effectively disable read()/write()
* on /dev/mem.
*/
static inline int devmem_is_allowed(unsigned long pfn)
{
if (iomem_is_exclusive(pfn << PAGE_SHIFT))
return 0;
if (!page_is_ram(pfn))
return 1;
return 0;
}
#endif /* CONFIG_STRICT_DEVMEM */
#endif /* __KERNEL__ */
#endif /* __UNICORE_IO_H__ */
|
