io.h
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上传日期:2013-02-24
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- /*
- * linux/include/asm-arm/arch-ebsa285/io.h
- *
- * Copyright (C) 1997-1999 Russell King
- *
- * 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.
- *
- * Modifications:
- * 06-12-1997 RMK Created.
- * 07-04-1999 RMK Major cleanup
- */
- #ifndef __ASM_ARM_ARCH_IO_H
- #define __ASM_ARM_ARCH_IO_H
- #define IO_SPACE_LIMIT 0xffff
- /*
- * Translation of various region addresses to virtual addresses
- */
- #define __io(a) (PCIO_BASE + (a))
- #if 1
- #define __mem_pci(a) ((unsigned long)(a))
- #define __mem_isa(a) (PCIMEM_BASE + (unsigned long)(a))
- #else
- static inline unsigned long ___mem_pci(unsigned long a)
- {
- if (a <= 0xc0000000 || a >= 0xe0000000)
- BUG();
- return a;
- }
- static inline unsigned long ___mem_isa(unsigned long a)
- {
- if (a >= 16*1048576)
- BUG();
- return PCIMEM_BASE + a;
- }
- #define __mem_pci(a) ___mem_pci((unsigned long)(a))
- #define __mem_isa(a) ___mem_isa((unsigned long)(a))
- #endif
- /*
- * Generic virtual read/write
- */
- #define __arch_getw(a) (*(volatile unsigned short *)(a))
- #define __arch_putw(v,a) (*(volatile unsigned short *)(a) = (v))
- #define iomem_valid_addr(iomem,sz) (1)
- #define iomem_to_phys(iomem) (iomem)
- #endif