include/lmb.h

   1 #ifndef _LINUX_LMB_H
   2 #define _LINUX_LMB_H
   3 #ifdef __KERNEL__
   4
   5 #include <asm/types.h>
   6 /*
   7  * Logical memory blocks.
   8  *
   9  * Copyright (C) 2001 Peter Bergner, IBM Corp.
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 #define MAX_LMB_REGIONS 8
  15
  16 struct lmb_property {
  17         phys_addr_t base;
  18         phys_size_t size;
  19 };
  20
  21 struct lmb_region {
  22         unsigned long cnt;
  23         phys_size_t size;
  24         struct lmb_property region[MAX_LMB_REGIONS+1];
  25 };
  26
  27 struct lmb {
  28         struct lmb_region memory;
  29         struct lmb_region reserved;
  30 };
  31
  32 extern struct lmb lmb;
  33
  34 extern void lmb_init(struct lmb *lmb);
  35 extern long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size);
  36 extern long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size);
  37 extern phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align);
  38 extern phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
  39                             phys_addr_t max_addr);
  40 extern phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align,
  41                               phys_addr_t max_addr);
  42 extern int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
  43 extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
  44
  45 extern void lmb_dump_all(struct lmb *lmb);
  46
  47 static inline phys_size_t
  48 lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
  49 {
  50         return type->region[region_nr].size;
  51 }
  52
  53 void board_lmb_reserve(struct lmb *lmb);
  54 void arch_lmb_reserve(struct lmb *lmb);
  55
  56 #endif /* __KERNEL__ */
  57
  58 #endif /* _LINUX_LMB_H */