1/*
2 * Copyright 2006 PathScale, Inc.  All Rights Reserved.
3 *
4 * This file is free software; you can redistribute it and/or modify
5 * it under the terms of version 2 of the GNU General Public License
6 * as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
16 */
17
18#ifndef _LINUX_IO_H
19#define _LINUX_IO_H
20
21#include <linux/types.h>
22#include <asm/io.h>
23#include <asm/page.h>
24
25struct device;
26
27void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
28void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
29
30#ifdef CONFIG_MMU
31int ioremap_page_range(unsigned long addr, unsigned long end,
32		       unsigned long phys_addr, pgprot_t prot);
33#else
34static inline int ioremap_page_range(unsigned long addr, unsigned long end,
35				     unsigned long phys_addr, pgprot_t prot)
36{
37	return 0;
38}
39#endif
40
41/*
42 * Managed iomap interface
43 */
44#ifdef CONFIG_HAS_IOPORT
45void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
46			       unsigned int nr);
47void devm_ioport_unmap(struct device *dev, void __iomem *addr);
48#else
49static inline void __iomem *devm_ioport_map(struct device *dev,
50					     unsigned long port,
51					     unsigned int nr)
52{
53	return NULL;
54}
55
56static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
57{
58}
59#endif
60
61void __iomem * devm_ioremap(struct device *dev, unsigned long offset,
62			    unsigned long size);
63void __iomem * devm_ioremap_nocache(struct device *dev, unsigned long offset,
64				    unsigned long size);
65void devm_iounmap(struct device *dev, void __iomem *addr);
66
67/**
68 *	check_signature		-	find BIOS signatures
69 *	@io_addr: mmio address to check
70 *	@signature:  signature block
71 *	@length: length of signature
72 *
73 *	Perform a signature comparison with the mmio address io_addr. This
74 *	address should have been obtained by ioremap.
75 *	Returns 1 on a match.
76 */
77
78static inline int check_signature(const volatile void __iomem *io_addr,
79	const unsigned char *signature, int length)
80{
81	int retval = 0;
82	do {
83		if (readb(io_addr) != *signature)
84			goto out;
85		io_addr++;
86		signature++;
87		length--;
88	} while (length);
89	retval = 1;
90out:
91	return retval;
92}
93
94#endif /* _LINUX_IO_H */
95