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author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2006-06-22 15:05:36 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-06-28 17:59:48 +0100 |
commit | 5924486dc0f205ebc2bbf4c262eec902ff38e802 (patch) | |
tree | acde32ec730762ed2d0a742990cfe2dc7f6e5cf0 /arch/arm/mm/iomap.c | |
parent | f9c21a6ee7e040be0f623a6b8dcfb5ec4f7532f5 (diff) | |
download | linux-5924486dc0f205ebc2bbf4c262eec902ff38e802.tar.bz2 |
[ARM] nommu: add stubs for ioremap and friends
nommu doesn't have any form of remapping support, so ioremap, etc
become stubs which just return the casted address, doing nothing
else.
Move ioport_map(), ioport_unmap(), pci_iomap(), pci_iounmap()
into a separate file which is always built.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/iomap.c')
-rw-r--r-- | arch/arm/mm/iomap.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/mm/iomap.c b/arch/arm/mm/iomap.c new file mode 100644 index 000000000000..62066f3020c8 --- /dev/null +++ b/arch/arm/mm/iomap.c @@ -0,0 +1,55 @@ +/* + * linux/arch/arm/mm/iomap.c + * + * Map IO port and PCI memory spaces so that {read,write}[bwl] can + * be used to access this memory. + */ +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/ioport.h> + +#include <asm/io.h> + +#ifdef __io +void __iomem *ioport_map(unsigned long port, unsigned int nr) +{ + return __io(port); +} +EXPORT_SYMBOL(ioport_map); + +void ioport_unmap(void __iomem *addr) +{ +} +EXPORT_SYMBOL(ioport_unmap); +#endif + +#ifdef CONFIG_PCI +void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) +{ + unsigned long start = pci_resource_start(dev, bar); + unsigned long len = pci_resource_len(dev, bar); + unsigned long flags = pci_resource_flags(dev, bar); + + if (!len || !start) + return NULL; + if (maxlen && len > maxlen) + len = maxlen; + if (flags & IORESOURCE_IO) + return ioport_map(start, len); + if (flags & IORESOURCE_MEM) { + if (flags & IORESOURCE_CACHEABLE) + return ioremap(start, len); + return ioremap_nocache(start, len); + } + return NULL; +} +EXPORT_SYMBOL(pci_iomap); + +void pci_iounmap(struct pci_dev *dev, void __iomem *addr) +{ + if ((unsigned long)addr >= VMALLOC_START && + (unsigned long)addr < VMALLOC_END) + iounmap(addr); +} +EXPORT_SYMBOL(pci_iounmap); +#endif |