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  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  *  Changelog:
  11  *   20-Oct-1996 RMK    Created
  12  *   31-Dec-1997 RMK    Fixed definitions to reduce warnings.
  13  *   17-May-1998 DAG    Added __virt_to_bus and __bus_to_virt functions.
  14  *   21-Nov-1998 RMK    Changed __virt_to_bus and __bus_to_virt to macros.
  15  *   21-Mar-1999 RMK    Added PAGE_OFFSET for co285 architecture.
  16  *                      Renamed to memory.h
  17  *                      Moved PAGE_OFFSET and TASK_SIZE here
  18  */
  19 #ifndef __ASM_ARCH_MEMORY_H
  20 #define __ASM_ARCH_MEMORY_H
  21
  22
  23 #if defined(CONFIG_FOOTBRIDGE_ADDIN)
  24 /*
  25  * If we may be using add-in footbridge mode, then we must
  26  * use the out-of-line translation that makes use of the
  27  * PCI BAR
  28  */
  29 #ifndef __ASSEMBLY__
  30 extern unsigned long __virt_to_bus(unsigned long);
  31 extern unsigned long __bus_to_virt(unsigned long);
  32 #endif
  33
  34 #elif defined(CONFIG_FOOTBRIDGE_HOST)
  35
  36 #define __virt_to_bus(x)        ((x) - 0xe0000000)
  37 #define __bus_to_virt(x)        ((x) + 0xe0000000)
  38
  39 #else
  40
  41 #error "Undefined footbridge mode"
  42
  43 #endif
  44
  45 #if defined(CONFIG_ARCH_FOOTBRIDGE)
  46
  47 /* Task size and page offset at 3GB */
  48 #define TASK_SIZE               UL(0xbf000000)
  49 #define PAGE_OFFSET             UL(0xc0000000)
  50
  51 /*
  52  * Cache flushing area.
  53  */
  54 #define FLUSH_BASE              0xf9000000
  55
  56 #elif defined(CONFIG_ARCH_CO285)
  57
  58 /* Task size and page offset at 1.5GB */
  59 #define TASK_SIZE               UL(0x5f000000)
  60 #define PAGE_OFFSET             UL(0x60000000)
  61
  62 /*
  63  * Cache flushing area.
  64  */
  65 #define FLUSH_BASE              0x7e000000
  66
  67 #else
  68
  69 #error "Undefined footbridge architecture"
  70
  71 #endif
  72
  73 /*
  74  * Physical DRAM offset.
  75  */
  76 #define PHYS_OFFSET             UL(0x00000000)
  77
  78 /*
  79  * This decides where the kernel will search for a free chunk of vm
  80  * space during mmap's.
  81  */
  82 #define TASK_UNMAPPED_BASE ((TASK_SIZE + 0x01000000) / 3)
  83
  84 #define FLUSH_BASE_PHYS         0x50000000
  85
  86 #endif