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Diffstat (limited to 'arch/xtensa/include/asm/io.h')
| -rw-r--r-- | arch/xtensa/include/asm/io.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h new file mode 100644 index 0000000000..934e58399c --- /dev/null +++ b/arch/xtensa/include/asm/io.h @@ -0,0 +1,62 @@ +/* + * include/asm-xtensa/io.h + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2001 - 2005 Tensilica Inc. + */ + +#ifndef _XTENSA_IO_H +#define _XTENSA_IO_H + +#include <asm/byteorder.h> +#include <asm/page.h> +#include <asm/vectors.h> +#include <linux/bug.h> +#include <linux/kernel.h> +#include <linux/pgtable.h> + +#include <linux/types.h> + +#define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x)) +#define IO_SPACE_LIMIT ~0 +#define PCI_IOBASE ((void __iomem *)XCHAL_KIO_BYPASS_VADDR) + +#ifdef CONFIG_MMU +/* + * I/O memory mapping functions. + */ +void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, + unsigned long prot); +#define ioremap_prot ioremap_prot +#define iounmap iounmap + +static inline void __iomem *ioremap(unsigned long offset, unsigned long size) +{ + if (offset >= XCHAL_KIO_PADDR + && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) + return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR); + else + return ioremap_prot(offset, size, + pgprot_val(pgprot_noncached(PAGE_KERNEL))); +} +#define ioremap ioremap + +static inline void __iomem *ioremap_cache(unsigned long offset, + unsigned long size) +{ + if (offset >= XCHAL_KIO_PADDR + && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) + return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR); + else + return ioremap_prot(offset, size, pgprot_val(PAGE_KERNEL)); + +} +#define ioremap_cache ioremap_cache +#endif /* CONFIG_MMU */ + +#include <asm-generic/io.h> + +#endif /* _XTENSA_IO_H */ |