lmb.h 1.4 KB

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