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/* * 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 #ifdef __KERNEL__ #include <asm/byteorder.h> #include <asm/page.h> #include <asm/vectors.h> #include <linux/bug.h> #include <linux/kernel.h> #include <linux/types.h> #define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x)) #define IO_SPACE_LIMIT ~0 #ifdef CONFIG_MMU #if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF) extern unsigned long xtensa_kio_paddr; static inline unsigned long xtensa_get_kio_paddr(void) { return xtensa_kio_paddr; } #endif /* * Return the virtual address for the specified bus memory. * Note that we currently don't support any address outside the KIO segment. */ static inline void __iomem *ioremap_nocache(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 BUG(); } 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 BUG(); } #define ioremap_cache ioremap_cache #define ioremap_wc ioremap_nocache #define ioremap_wt ioremap_nocache static inline void __iomem *ioremap(unsigned long offset, unsigned long size) { return ioremap_nocache(offset, size); } static inline void iounmap(volatile void __iomem *addr) { } #define virt_to_bus virt_to_phys #define bus_to_virt phys_to_virt #endif /* CONFIG_MMU */ #endif /* __KERNEL__ */ #include <asm-generic/io.h> #endif /* _XTENSA_IO_H */ |