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

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