85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/*
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* include/asm-xtensa/io.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001 - 2005 Tensilica Inc.
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*/
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#ifndef _XTENSA_IO_H
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#define _XTENSA_IO_H
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#ifdef __KERNEL__
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#include <asm/byteorder.h>
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#include <asm/page.h>
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#include <asm/vectors.h>
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#include <linux/bug.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x))
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#define IO_SPACE_LIMIT ~0
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#ifdef CONFIG_MMU
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void __iomem *xtensa_ioremap_nocache(unsigned long addr, unsigned long size);
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void __iomem *xtensa_ioremap_cache(unsigned long addr, unsigned long size);
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void xtensa_iounmap(volatile void __iomem *addr);
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/*
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* Return the virtual address for the specified bus memory.
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*/
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static inline void __iomem *ioremap_nocache(unsigned long offset,
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unsigned long size)
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{
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if (offset >= XCHAL_KIO_PADDR
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&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
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return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
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else
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return xtensa_ioremap_nocache(offset, size);
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}
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static inline void __iomem *ioremap_cache(unsigned long offset,
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unsigned long size)
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{
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if (offset >= XCHAL_KIO_PADDR
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&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
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return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
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else
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return xtensa_ioremap_cache(offset, size);
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}
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#define ioremap_cache ioremap_cache
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#define ioremap_wc ioremap_nocache
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#define ioremap_wt ioremap_nocache
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static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
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{
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return ioremap_nocache(offset, size);
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}
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static inline void iounmap(volatile void __iomem *addr)
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{
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unsigned long va = (unsigned long) addr;
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if (!(va >= XCHAL_KIO_CACHED_VADDR &&
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va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) &&
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!(va >= XCHAL_KIO_BYPASS_VADDR &&
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va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE))
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xtensa_iounmap(addr);
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}
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#define virt_to_bus virt_to_phys
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#define bus_to_virt phys_to_virt
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#endif /* CONFIG_MMU */
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#endif /* __KERNEL__ */
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#include <asm-generic/io.h>
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#endif /* _XTENSA_IO_H */
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