diff options
Diffstat (limited to 'arch/mips/lib/iomap.c')
-rw-r--r-- | arch/mips/lib/iomap.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/mips/lib/iomap.c b/arch/mips/lib/iomap.c new file mode 100644 index 00000000000..b5d5fa83376 --- /dev/null +++ b/arch/mips/lib/iomap.c @@ -0,0 +1,78 @@ +/* + * 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 <yuasa@hh.iij4u.or.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_cacheable_cow(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); |