arch/xtensa/include/asm/sysmem.h

   1 /*
   2  * sysmem-related prototypes.
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2014 Cadence Design Systems Inc.
   9  */
  10
  11 #ifndef _XTENSA_SYSMEM_H
  12 #define _XTENSA_SYSMEM_H
  13
  14 #define SYSMEM_BANKS_MAX 31
  15
  16 struct meminfo {
  17         unsigned long start;
  18         unsigned long end;
  19 };
  20
  21 /*
  22  * Bank array is sorted by .start.
  23  * Banks don't overlap and there's at least one page gap
  24  * between adjacent bank entries.
  25  */
  26 struct sysmem_info {
  27         int nr_banks;
  28         struct meminfo bank[SYSMEM_BANKS_MAX];
  29 };
  30
  31 extern struct sysmem_info sysmem;
  32
  33 int add_sysmem_bank(unsigned long start, unsigned long end);
  34 int mem_reserve(unsigned long, unsigned long, int);
  35 void bootmem_init(void);
  36 void zones_init(void);
  37
  38 #endif /* _XTENSA_SYSMEM_H */