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
25void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
26void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
27
28int ioremap_page_range(unsigned long addr, unsigned long end,
29 unsigned long phys_addr, pgprot_t prot);
30
31/**
32 * check_signature - find BIOS signatures
33 * @io_addr: mmio address to check
34 * @signature: signature block
35 * @length: length of signature
36 *
37 * Perform a signature comparison with the mmio address io_addr. This
38 * address should have been obtained by ioremap.
39 * Returns 1 on a match.
40 */
41
42static inline int check_signature(const volatile void __iomem *io_addr,
43 const unsigned char *signature, int length)
44{
45 int retval = 0;
46 do {
47 if (readb(io_addr) != *signature)
48 goto out;
49 io_addr++;
50 signature++;
51 length--;
52 } while (length);
53 retval = 1;
54out:
55 return retval;
56}
57
58#endif /* _LINUX_IO_H */