Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
30int ioremap_page_range(unsigned long addr, unsigned long end,
31 unsigned long phys_addr, pgprot_t prot);
32
33/*
34 * Managed iomap interface
35 */
36void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
37 unsigned int nr);
38void devm_ioport_unmap(struct device *dev, void __iomem *addr);
39
40void __iomem * devm_ioremap(struct device *dev, unsigned long offset,
41 unsigned long size);
42void __iomem * devm_ioremap_nocache(struct device *dev, unsigned long offset,
43 unsigned long size);
44void devm_iounmap(struct device *dev, void __iomem *addr);
45
46/**
47 * check_signature - find BIOS signatures
48 * @io_addr: mmio address to check
49 * @signature: signature block
50 * @length: length of signature
51 *
52 * Perform a signature comparison with the mmio address io_addr. This
53 * address should have been obtained by ioremap.
54 * Returns 1 on a match.
55 */
56
57static inline int check_signature(const volatile void __iomem *io_addr,
58 const unsigned char *signature, int length)
59{
60 int retval = 0;
61 do {
62 if (readb(io_addr) != *signature)
63 goto out;
64 io_addr++;
65 signature++;
66 length--;
67 } while (length);
68 retval = 1;
69out:
70 return retval;
71}
72
73#endif /* _LINUX_IO_H */