arch/um/include/mem.h

   1 /*
   2  * Copyright (C) 2002, 2003 Jeff Dike (jdike@addtoit.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __MEM_H__
   7 #define __MEM_H__
   8
   9 #include "linux/types.h"
  10
  11 extern int phys_mapping(unsigned long phys, __u64 *offset_out);
  12 extern int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w);
  13 extern int is_remapped(void *virt);
  14 extern int physmem_remove_mapping(void *virt);
  15 extern void physmem_forget_descriptor(int fd);
  16
  17 extern unsigned long uml_physmem;
  18 static inline unsigned long to_phys(void *virt)
  19 {
  20         return(((unsigned long) virt) - uml_physmem);
  21 }
  22
  23 static inline void *to_virt(unsigned long phys)
  24 {
  25         return((void *) uml_physmem + phys);
  26 }
  27
  28 #endif
  29
  30 /*
  31  * Overrides for Emacs so that we follow Linus's tabbing style.
  32  * Emacs will notice this stuff at the end of the file and automatically
  33  * adjust the settings for this buffer only.  This must remain at the end
  34  * of the file.
  35  * ---------------------------------------------------------------------------
  36  * Local variables:
  37  * c-file-style: "linux"
  38  * End:
  39  */