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io.h
Package: linux-2.4.20.tar.gz [view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 1k
Category:
Linux-Unix program
Development Platform:
Unix_Linux
- /*
- * linux/include/asm-arm/arch-nexuspci/io.h
- *
- * Copyright (C) 1997-1999 Russell King
- * Copyright (C) 2000 FutureTV Labs Ltd.
- */
- #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)
- {
- /* PCI addresses must have been ioremapped */
- if (a <= 0xc0000000 || a >= 0xe0000000)
- *((int *)0) = 0;
- 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))
- /*
- * ioremap support - validate a PCI memory address,
- * and convert a PCI memory address to a physical
- * address for the page tables.
- */
- #define iomem_valid_addr(iomem,sz)
- ((iomem) < 0x80000000 && (iomem) + (sz) <= 0x80000000)
- #define iomem_to_phys(iomem) ((iomem) + PLX_MEM_START)
- #endif