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Diffstat (limited to '')
| -rw-r--r-- | arch/unicore32/mm/iomap.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/unicore32/mm/iomap.c b/arch/unicore32/mm/iomap.c new file mode 100644 index 000000000000..a7e1a3d2e069 --- /dev/null +++ b/arch/unicore32/mm/iomap.c @@ -0,0 +1,56 @@ +/* + * linux/arch/unicore32/mm/iomap.c + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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 <linux/io.h> + +#ifdef __io +void __iomem *ioport_map(unsigned long port, unsigned int nr) +{ + /* we map PC lagcy 64K IO port to PCI IO space 0x80030000 */ + return (void __iomem *) (unsigned long) + io_p2v((port & 0xffff) + PKUNITY_PCILIO_BASE); +} +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) +{ + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t 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); +#endif |