mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
78 lines
2 KiB
C
78 lines
2 KiB
C
/*
|
|
* iomap.c, Memory Mapped I/O routines for MIPS architecture.
|
|
*
|
|
* This code is based on lib/iomap.c, by Linus Torvalds.
|
|
*
|
|
* Copyright (C) 2004-2005 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include <linux/ioport.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
void __iomem *ioport_map(unsigned long port, unsigned int nr)
|
|
{
|
|
unsigned long end;
|
|
|
|
end = port + nr - 1UL;
|
|
if (ioport_resource.start > port ||
|
|
ioport_resource.end < end || port > end)
|
|
return NULL;
|
|
|
|
return (void __iomem *)(mips_io_port_base + port);
|
|
}
|
|
|
|
void ioport_unmap(void __iomem *addr)
|
|
{
|
|
}
|
|
EXPORT_SYMBOL(ioport_map);
|
|
EXPORT_SYMBOL(ioport_unmap);
|
|
|
|
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
|
|
{
|
|
unsigned long start, len, flags;
|
|
|
|
if (dev == NULL)
|
|
return NULL;
|
|
|
|
start = pci_resource_start(dev, bar);
|
|
len = pci_resource_len(dev, bar);
|
|
if (!start || !len)
|
|
return NULL;
|
|
|
|
if (maxlen != 0 && len > maxlen)
|
|
len = maxlen;
|
|
|
|
flags = pci_resource_flags(dev, bar);
|
|
if (flags & IORESOURCE_IO)
|
|
return ioport_map(start, len);
|
|
if (flags & IORESOURCE_MEM) {
|
|
if (flags & IORESOURCE_CACHEABLE)
|
|
return ioremap_cachable(start, len);
|
|
return ioremap_nocache(start, len);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
|
|
{
|
|
iounmap(addr);
|
|
}
|
|
EXPORT_SYMBOL(pci_iomap);
|
|
EXPORT_SYMBOL(pci_iounmap);
|