include/asm-x86/e820_64.h

   1 /*
   2  * structures and definitions for the int 15, ax=e820 memory map
   3  * scheme.
   4  *
   5  * In a nutshell, setup.S populates a scratch table in the
   6  * empty_zero_block that contains a list of usable address/size
   7  * duples.  setup.c, this information is transferred into the e820map,
   8  * and in init.c/numa.c, that new information is used to mark pages
   9  * reserved or not.
  10  */
  11 #ifndef __E820_HEADER
  12 #define __E820_HEADER
  13
  14 #include <linux/ioport.h>
  15
  16 #ifndef __ASSEMBLY__
  17 extern unsigned long find_e820_area(unsigned long start, unsigned long end,
  18                                     unsigned long size, unsigned long align);
  19 extern unsigned long find_e820_area_size(unsigned long start,
  20                                          unsigned long *sizep,
  21                                          unsigned long align);
  22 extern void add_memory_region(unsigned long start, unsigned long size,
  23                               int type);
  24 extern void update_memory_range(u64 start, u64 size, unsigned old_type,
  25                                 unsigned new_type);
  26 extern void setup_memory_region(void);
  27 extern void contig_e820_setup(void);
  28 extern unsigned long e820_end_of_ram(void);
  29 extern void e820_reserve_resources(void);
  30 extern void e820_mark_nosave_regions(void);
  31 extern int e820_any_mapped(unsigned long start, unsigned long end,
  32                            unsigned type);
  33 extern int e820_all_mapped(unsigned long start, unsigned long end,
  34                            unsigned type);
  35 extern int e820_any_non_reserved(unsigned long start, unsigned long end);
  36 extern int is_memory_any_valid(unsigned long start, unsigned long end);
  37 extern int e820_all_non_reserved(unsigned long start, unsigned long end);
  38 extern int is_memory_all_valid(unsigned long start, unsigned long end);
  39 extern unsigned long e820_hole_size(unsigned long start, unsigned long end);
  40
  41 extern void e820_setup_gap(void);
  42 extern void e820_register_active_regions(int nid, unsigned long start_pfn,
  43                                          unsigned long end_pfn);
  44
  45 extern void finish_e820_parsing(void);
  46
  47 extern struct e820map e820;
  48 extern void update_e820(void);
  49
  50 extern void reserve_early(unsigned long start, unsigned long end, char *name);
  51 extern void free_early(unsigned long start, unsigned long end);
  52 extern void early_res_to_bootmem(unsigned long start, unsigned long end);
  53
  54 #endif/*!__ASSEMBLY__*/
  55
  56 #endif/*__E820_HEADER*/