tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * iomap.c, Memory Mapped I/O routines for MIPS architecture.
3 *
4 * This code is based on lib/iomap.c, by Linus Torvalds.
5 *
6 * Copyright (C) 2004-2005 Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22#include <linux/ioport.h>
23#include <linux/module.h>
24#include <linux/pci.h>
25
26#include <asm/io.h>
27
28void __iomem *ioport_map(unsigned long port, unsigned int nr)
29{
30 unsigned long end;
31
32 end = port + nr - 1UL;
33 if (ioport_resource.start > port ||
34 ioport_resource.end < end || port > end)
35 return NULL;
36
37 return (void __iomem *)(mips_io_port_base + port);
38}
39
40void ioport_unmap(void __iomem *addr)
41{
42}
43EXPORT_SYMBOL(ioport_map);
44EXPORT_SYMBOL(ioport_unmap);
45
46void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
47{
48 unsigned long start, len, flags;
49
50 if (dev == NULL)
51 return NULL;
52
53 start = pci_resource_start(dev, bar);
54 len = pci_resource_len(dev, bar);
55 if (!start || !len)
56 return NULL;
57
58 if (maxlen != 0 && len > maxlen)
59 len = maxlen;
60
61 flags = pci_resource_flags(dev, bar);
62 if (flags & IORESOURCE_IO)
63 return ioport_map(start, len);
64 if (flags & IORESOURCE_MEM) {
65 if (flags & IORESOURCE_CACHEABLE)
66 return ioremap_cacheable_cow(start, len);
67 return ioremap_nocache(start, len);
68 }
69
70 return NULL;
71}
72
73void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
74{
75 iounmap(addr);
76}
77EXPORT_SYMBOL(pci_iomap);
78EXPORT_SYMBOL(pci_iounmap);