include/asm-cris/arch-v10/page.h

   1 #ifndef _CRIS_ARCH_PAGE_H
   2 #define _CRIS_ARCH_PAGE_H
   3
   4 #include <linux/config.h>
   5
   6 #ifdef __KERNEL__
   7
   8 /* This handles the memory map.. */
   9 #ifdef CONFIG_CRIS_LOW_MAP
  10 #define PAGE_OFFSET             KSEG_6   /* kseg_6 is mapped to physical ram */
  11 #else
  12 #define PAGE_OFFSET             KSEG_C   /* kseg_c is mapped to physical ram */
  13 #endif
  14
  15 /* macros to convert between really physical and virtual addresses
  16  * by stripping a selected bit, we can convert between KSEG_x and 0x40000000 where
  17  * the DRAM really resides
  18  */
  19
  20 #ifdef CONFIG_CRIS_LOW_MAP
  21 /* we have DRAM virtually at 0x6 */
  22 #define __pa(x)                 ((unsigned long)(x) & 0xdfffffff)
  23 #define __va(x)                 ((void *)((unsigned long)(x) | 0x20000000))
  24 #else
  25 /* we have DRAM virtually at 0xc */
  26 #define __pa(x)                 ((unsigned long)(x) & 0x7fffffff)
  27 #define __va(x)                 ((void *)((unsigned long)(x) | 0x80000000))
  28 #endif
  29
  30 #endif
  31 #endif