include/asm-arm/arch-ebsa285/memory.h

   1 /*
   2  * linux/include/asm-arm/arch-ebsa285/memory.h
   3  *
   4  * Copyright (c) 1996-1999 Russell King.
   5  *
   6  * Changelog:
   7  *  20-Oct-1996 RMK     Created
   8  *  31-Dec-1997 RMK     Fixed definitions to reduce warnings.
   9  *  17-May-1998 DAG     Added __virt_to_bus and __bus_to_virt functions.
  10  *  21-Nov-1998 RMK     Changed __virt_to_bus and __bus_to_virt to macros.
  11  *  21-Mar-1999 RMK     Added PAGE_OFFSET for co285 architecture.
  12  *                      Renamed to memory.h
  13  *                      Moved PAGE_OFFSET and TASK_SIZE here
  14  */
  15 #ifndef __ASM_ARCH_MMU_H
  16 #define __ASM_ARCH_MMU_H
  17
  18 #include <linux/config.h>
  19
  20 #if defined(CONFIG_HOST_FOOTBRIDGE)
  21
  22 /*
  23  * Task size: 3GB
  24  */
  25 #define TASK_SIZE               (0xc0000000UL)
  26 #define TASK_SIZE_26            (0x04000000UL)
  27
  28 /*
  29  * Page offset: 3GB
  30  */
  31 #define PAGE_OFFSET             (0xc0000000UL)
  32 #define PHYS_OFFSET             (0x00000000UL)
  33
  34 #define __virt_to_bus__is_a_macro
  35 #define __virt_to_bus(x)        ((x) - 0xe0000000)
  36 #define __bus_to_virt__is_a_macro
  37 #define __bus_to_virt(x)        ((x) + 0xe0000000)
  38
  39 #elif defined(CONFIG_ADDIN_FOOTBRIDGE)
  40
  41 #if defined(CONFIG_ARCH_CO285)
  42
  43 /*
  44  * Task size: 1.5GB
  45  */
  46 #define TASK_SIZE               (0x60000000UL)
  47 #define TASK_SIZE_26            (0x04000000UL)
  48
  49 /*
  50  * Page offset: 1.5GB
  51  */
  52 #define PAGE_OFFSET             (0x60000000UL)
  53 #define PHYS_OFFSET             (0x00000000UL)
  54
  55 #else
  56
  57 #error Add in your architecture here
  58
  59 #endif
  60
  61 #ifndef __ASSEMBLY__
  62 extern unsigned long __virt_to_bus(unsigned long);
  63 extern unsigned long __bus_to_virt(unsigned long);
  64 #endif
  65
  66 #endif
  67
  68 /*
  69  * On Footbridge machines, the dram is contiguous.
  70  * On Host Footbridge, these conversions are constant.
  71  * On an add-in footbridge, these depend on register settings.
  72  */
  73 #define __virt_to_phys__is_a_macro
  74 #define __virt_to_phys(vpage) ((unsigned long)(vpage) - PAGE_OFFSET)
  75 #define __phys_to_virt__is_a_macro
  76 #define __phys_to_virt(ppage) ((unsigned long)(ppage) + PAGE_OFFSET)
  77
  78 #endif