include/asm-arm/arch-nexuspci/io.h

   1 /*
   2  * linux/include/asm-arm/arch-nexuspci/io.h
   3  *
   4  * Copyright (C) 1997-1999 Russell King
   5  * Copyright (C) 2000 FutureTV Labs Ltd.
   6  */
   7 #ifndef __ASM_ARM_ARCH_IO_H
   8 #define __ASM_ARM_ARCH_IO_H
   9
  10 #define IO_SPACE_LIMIT 0xffff
  11
  12 /*
  13  * Translation of various region addresses to virtual addresses
  14  */
  15 #define __io(a)                 (PCIO_BASE + (a))
  16 #if 1
  17 #define __mem_pci(a)            ((unsigned long)(a))
  18 #define __mem_isa(a)            (PCIMEM_BASE + (unsigned long)(a))
  19 #else
  20
  21 static inline unsigned long ___mem_pci(unsigned long a)
  22 {
  23         /* PCI addresses must have been ioremapped */
  24         if (a <= 0xc0000000 || a >= 0xe0000000)
  25                 *((int *)0) = 0;
  26         return a;
  27 }
  28
  29 static inline unsigned long ___mem_isa(unsigned long a)
  30 {
  31         BUG_ON(a >= 16*1048576);
  32         return PCIMEM_BASE + a;
  33 }
  34 #define __mem_pci(a)            ___mem_pci((unsigned long)(a))
  35 #define __mem_isa(a)            ___mem_isa((unsigned long)(a))
  36 #endif
  37
  38 /*
  39  * ioremap support - validate a PCI memory address,
  40  * and convert a PCI memory address to a physical
  41  * address for the page tables.
  42  */
  43 #define iomem_valid_addr(iomem,sz)      \
  44         ((iomem) < 0x80000000 && (iomem) + (sz) <= 0x80000000)
  45 #define iomem_to_phys(iomem)    ((iomem) + PLX_MEM_START)
  46
  47 #define __arch_ioremap(off,sz,nocache)                          \
  48  ({                                                             \
  49         unsigned long _off = (off), _size = (sz);               \
  50         void *_ret = (void *)0;                                 \
  51         if (iomem_valid_addr(_off, _size))                      \
  52                 _ret = __ioremap(iomem_to_phys(_off),_size,0);  \
  53         _ret;                                                   \
  54  })
  55
  56 #define __arch_iounmap __iounmap
  57
  58 #endif