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 #include <linux/config.h>
  14
  15 #ifdef CONFIG_32BIT
  16
  17 #define CAC_BASE                0x80000000
  18 #define IO_BASE                 0xa0000000
  19 #define UNCAC_BASE              0xa0000000
  20 #define MAP_BASE                0xc0000000
  21
  22 /*
  23  * This handles the memory map.
  24  * We handle pages at KSEG0 for kernels with 32 bit address space.
  25  */
  26 #define PAGE_OFFSET             0x80000000UL
  27
  28 /*
  29  * Memory above this physical address will be considered highmem.
  30  */
  31 #ifndef HIGHMEM_START
  32 #define HIGHMEM_START           0x20000000UL
  33 #endif
  34
  35 #endif /* CONFIG_32BIT */
  36
  37 #ifdef CONFIG_64BIT
  38
  39 /*
  40  * This handles the memory map.
  41  */
  42 #ifdef CONFIG_DMA_NONCOHERENT
  43 #define PAGE_OFFSET     0x9800000000000000UL
  44 #else
  45 #define PAGE_OFFSET     0xa800000000000000UL
  46 #endif
  47
  48 /*
  49  * Memory above this physical address will be considered highmem.
  50  * Fixme: 59 bits is a fictive number and makes assumptions about processors
  51  * in the distant future.  Nobody will care for a few years :-)
  52  */
  53 #ifndef HIGHMEM_START
  54 #define HIGHMEM_START           (1UL << 59UL)
  55 #endif
  56
  57 #ifdef CONFIG_DMA_NONCOHERENT
  58 #define CAC_BASE                0x9800000000000000
  59 #else
  60 #define CAC_BASE                0xa800000000000000
  61 #endif
  62 #define IO_BASE                 0x9000000000000000
  63 #define UNCAC_BASE              0x9000000000000000
  64 #define MAP_BASE                0xc000000000000000
  65
  66 #define TO_PHYS(x)              (             ((x) & TO_PHYS_MASK))
  67 #define TO_CAC(x)               (CAC_BASE   | ((x) & TO_PHYS_MASK))
  68 #define TO_UNCAC(x)             (UNCAC_BASE | ((x) & TO_PHYS_MASK))
  69
  70 #endif /* CONFIG_64BIT */
  71
  72 #endif /* __ASM_MACH_GENERIC_SPACES_H */