include/asm-cris/arch-v32/page.h

   1 #ifndef _ASM_CRIS_ARCH_PAGE_H
   2 #define _ASM_CRIS_ARCH_PAGE_H
   3
   4 #include <linux/config.h>
   5
   6 #ifdef __KERNEL__
   7
   8 #define PAGE_OFFSET KSEG_C      /* kseg_c is mapped to physical ram. */
   9
  10 /*
  11  * Macros to convert between physical and virtual addresses. By stripiing a
  12  * selected bit it's possible to convert between KSEG_x and 0x40000000 where the
  13  * DRAM really resides. DRAM is virtually at 0xc.
  14  */
  15 #ifndef CONFIG_ETRAXFS_SIM
  16 #define __pa(x) ((unsigned long)(x) & 0x7fffffff)
  17 #define __va(x) ((void *)((unsigned long)(x) | 0x80000000))
  18 #else
  19 #define __pa(x) ((unsigned long)(x) & 0x3fffffff)
  20 #define __va(x) ((void *)((unsigned long)(x) | 0xc0000000))
  21 #endif
  22
  23 #define VM_STACK_DEFAULT_FLAGS  (VM_READ | VM_WRITE | \
  24                                  VM_MAYREAD | VM_MAYWRITE)
  25
  26 #endif /* __KERNEL__ */
  27
  28 #endif /* _ASM_CRIS_ARCH_PAGE_H */