include/asm-ia64/meminit.h

   1 #ifndef meminit_h
   2 #define meminit_h
   3
   4 /*
   5  * This file is subject to the terms and conditions of the GNU General Public
   6  * License.  See the file "COPYING" in the main directory of this archive
   7  * for more details.
   8  */
   9
  10 #include <linux/config.h>
  11
  12 /*
  13  * Entries defined so far:
  14  *      - boot param structure itself
  15  *      - memory map
  16  *      - initrd (optional)
  17  *      - command line string
  18  *      - kernel code & data
  19  *
  20  * More could be added if necessary
  21  */
  22 #define IA64_MAX_RSVD_REGIONS 5
  23
  24 struct rsvd_region {
  25         unsigned long start;    /* virtual address of beginning of element */
  26         unsigned long end;      /* virtual address of end of element + 1 */
  27 };
  28
  29 extern struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1];
  30 extern int num_rsvd_regions;
  31
  32 extern void find_memory (void);
  33 extern void reserve_memory (void);
  34 extern void find_initrd (void);
  35 extern int filter_rsvd_memory (unsigned long start, unsigned long end, void *arg);
  36
  37 /*
  38  * For rounding an address to the next IA64_GRANULE_SIZE or order
  39  */
  40 #define GRANULEROUNDDOWN(n)     ((n) & ~(IA64_GRANULE_SIZE-1))
  41 #define GRANULEROUNDUP(n)       (((n)+IA64_GRANULE_SIZE-1) & ~(IA64_GRANULE_SIZE-1))
  42 #define ORDERROUNDDOWN(n)       ((n) & ~((PAGE_SIZE<<MAX_ORDER)-1))
  43
  44 #ifdef CONFIG_DISCONTIGMEM
  45   extern void call_pernode_memory (unsigned long start, unsigned long len, void *func);
  46 #else
  47 # define call_pernode_memory(start, len, func)  (*func)(start, len, 0)
  48 #endif
  49
  50 #define IGNORE_PFN0     1       /* XXX fix me: ignore pfn 0 until TLB miss handler is updated... */
  51
  52 #ifdef CONFIG_VIRTUAL_MEM_MAP
  53 # define LARGE_GAP      0x40000000 /* Use virtual mem map if hole is > than this */
  54   extern unsigned long vmalloc_end;
  55   extern struct page *vmem_map;
  56   extern int find_largest_hole (u64 start, u64 end, void *arg);
  57   extern int create_mem_map_page_table (u64 start, u64 end, void *arg);
  58 #endif
  59
  60 #endif /* meminit_h */