release/src-rt-6.x/linux/linux-2.6/include/asm-mips/mach-generic/spaces.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
   7  * Copyright (C) 2000, 2002  Maciej W. Rozycki
   8  * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
   9  */
  10 #ifndef _ASM_MACH_GENERIC_SPACES_H
  11 #define _ASM_MACH_GENERIC_SPACES_H
  12
  13
  14 #ifdef CONFIG_32BIT
  15
  16 #define CAC_BASE                0x80000000
  17 #define IO_BASE                 0xa0000000
  18 #define UNCAC_BASE              0xa0000000
  19 #define MAP_BASE                0xc0000000
  20
  21 /*
  22  * This handles the memory map.
  23  * We handle pages at KSEG0 for kernels with 32 bit address space.
  24  */
  25 #define PAGE_OFFSET             0x80000000UL
  26
  27 /*
  28  * Memory above this physical address will be considered highmem.
  29  */
  30 #ifndef HIGHMEM_START
  31 #define HIGHMEM_START           0x20000000UL
  32 #endif
  33
  34 #endif /* CONFIG_32BIT */
  35
  36 #ifdef CONFIG_64BIT
  37
  38 /*
  39  * This handles the memory map.
  40  */
  41 #ifdef CONFIG_DMA_NONCOHERENT
  42 #define PAGE_OFFSET     0x9800000000000000UL
  43 #else
  44 #define PAGE_OFFSET     0xa800000000000000UL
  45 #endif
  46
  47 /*
  48  * Memory above this physical address will be considered highmem.
  49  * Fixme: 59 bits is a fictive number and makes assumptions about processors
  50  * in the distant future.  Nobody will care for a few years :-)
  51  */
  52 #ifndef HIGHMEM_START
  53 #define HIGHMEM_START           (1UL << 59UL)
  54 #endif
  55
  56 #ifdef CONFIG_DMA_NONCOHERENT
  57 #define CAC_BASE                0x9800000000000000UL
  58 #else
  59 #define CAC_BASE                0xa800000000000000UL
  60 #endif
  61 #define IO_BASE                 0x9000000000000000UL
  62 #define UNCAC_BASE              0x9000000000000000UL
  63 #define MAP_BASE                0xc000000000000000UL
  64
  65 #define TO_PHYS(x)              (             ((x) & TO_PHYS_MASK))
  66 #define TO_CAC(x)               (CAC_BASE   | ((x) & TO_PHYS_MASK))
  67 #define TO_UNCAC(x)             (UNCAC_BASE | ((x) & TO_PHYS_MASK))
  68
  69 #endif /* CONFIG_64BIT */
  70
  71 #endif /* __ASM_MACH_GENERIC_SPACES_H */