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73 lines
1.9 KiB
73 lines
1.9 KiB
/* |
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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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#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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#define PCI_IOBASE ((void __iomem *)XCHAL_KIO_BYPASS_VADDR) |
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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(unsigned long offset, 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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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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#include <asm-generic/io.h> |
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#endif /* _XTENSA_IO_H */
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