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 000000000000..b5d5fa833762
--- /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);