vmalloc.h 2.3 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677
  1. #ifndef _LINUX_VMALLOC_H
  2. #define _LINUX_VMALLOC_H
  3. #include <linux/spinlock.h>
  4. #include <asm/page.h> /* pgprot_t */
  5. struct vm_area_struct;
  6. /* bits in vm_struct->flags */
  7. #define VM_IOREMAP 0x00000001 /* ioremap() and friends */
  8. #define VM_ALLOC 0x00000002 /* vmalloc() */
  9. #define VM_MAP 0x00000004 /* vmap()ed pages */
  10. #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
  11. #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
  12. /* bits [20..32] reserved for arch specific ioremap internals */
  13. /*
  14. * Maximum alignment for ioremap() regions.
  15. * Can be overriden by arch-specific value.
  16. */
  17. #ifndef IOREMAP_MAX_ORDER
  18. #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
  19. #endif
  20. struct vm_struct {
  21. /* keep next,addr,size together to speedup lookups */
  22. struct vm_struct *next;
  23. void *addr;
  24. unsigned long size;
  25. unsigned long flags;
  26. struct page **pages;
  27. unsigned int nr_pages;
  28. unsigned long phys_addr;
  29. };
  30. /*
  31. * Highlevel APIs for driver use
  32. */
  33. extern void *vmalloc(unsigned long size);
  34. extern void *vmalloc_user(unsigned long size);
  35. extern void *vmalloc_node(unsigned long size, int node);
  36. extern void *vmalloc_exec(unsigned long size);
  37. extern void *vmalloc_32(unsigned long size);
  38. extern void *vmalloc_32_user(unsigned long size);
  39. extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
  40. extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
  41. pgprot_t prot);
  42. extern void vfree(void *addr);
  43. extern void *vmap(struct page **pages, unsigned int count,
  44. unsigned long flags, pgprot_t prot);
  45. extern void vunmap(void *addr);
  46. extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
  47. unsigned long pgoff);
  48. /*
  49. * Lowlevel-APIs (not for driver use!)
  50. */
  51. extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
  52. extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
  53. unsigned long start, unsigned long end);
  54. extern struct vm_struct *get_vm_area_node(unsigned long size,
  55. unsigned long flags, int node,
  56. gfp_t gfp_mask);
  57. extern struct vm_struct *remove_vm_area(void *addr);
  58. extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
  59. struct page ***pages);
  60. extern void unmap_vm_area(struct vm_struct *area);
  61. /*
  62. * Internals. Dont't use..
  63. */
  64. extern rwlock_t vmlist_lock;
  65. extern struct vm_struct *vmlist;
  66. #endif /* _LINUX_VMALLOC_H */