/*
   * structures and definitions for the int 15, ax=e820 memory map
   * scheme.
   *
   * In a nutshell, setup.S populates a scratch table in the
   * empty_zero_block that contains a list of usable address/size
   * duples.  setup.c, this information is transferred into the e820map,
   * and in init.c/numa.c, that new information is used to mark pages
   * reserved or not.
   */
  #ifndef __E820_HEADER
  #define __E820_HEADER

  #define E820MAP	0x2d0		/* our map */

  #define E820MAX	128		/* number of entries in E820MAP */

  #define E820NR	0x1e8		/* # entries in E820MAP */
  
  #define E820_RAM	1
  #define E820_RESERVED	2

  #define E820_ACPI	3

  #define E820_NVS	4

  #ifndef __ASSEMBLY__
  struct e820entry {
  	u64 addr;	/* start of memory segment */
  	u64 size;	/* size of memory segment */
  	u32 type;	/* type of memory segment */
  } __attribute__((packed));
  
  struct e820map {

  	u32 nr_map;

  	struct e820entry map[E820MAX];
  };
  
  extern unsigned long find_e820_area(unsigned long start, unsigned long end, 
  				    unsigned size);
  extern void add_memory_region(unsigned long start, unsigned long size, 
  			      int type);
  extern void setup_memory_region(void);
  extern void contig_e820_setup(void); 
  extern unsigned long e820_end_of_ram(void);
  extern void e820_reserve_resources(void);

  extern void e820_mark_nosave_regions(void);

  extern void e820_print_map(char *who);

  extern int e820_any_mapped(unsigned long start, unsigned long end, unsigned type);

  extern int e820_all_mapped(unsigned long start, unsigned long end, unsigned type);

  extern unsigned long e820_hole_size(unsigned long start, unsigned long end);

  extern void e820_setup_gap(void);

  extern void e820_register_active_regions(int nid,
  				unsigned long start_pfn, unsigned long end_pfn);

  extern void finish_e820_parsing(void);

  
  extern struct e820map e820;

  
  extern unsigned ebda_addr, ebda_size;

  extern unsigned long nodemap_addr, nodemap_size;

  #endif/*!__ASSEMBLY__*/
  
  #endif/*__E820_HEADER*/