include/linux/vmalloc.h

   1 #ifndef _LINUX_VMALLOC_H
   2 #define _LINUX_VMALLOC_H
   3
   4 #include <linux/spinlock.h>
   5 #include <asm/page.h>           /* pgprot_t */
   6
   7 /* bits in vm_struct->flags */
   8 #define VM_IOREMAP      0x00000001      /* ioremap() and friends */
   9 #define VM_ALLOC        0x00000002      /* vmalloc() */
  10 #define VM_MAP          0x00000004      /* vmap()ed pages */
  11
  12 struct vm_struct {
  13         void                    *addr;
  14         unsigned long           size;
  15         unsigned long           flags;
  16         struct page             **pages;
  17         unsigned int            nr_pages;
  18         unsigned long           phys_addr;
  19         struct vm_struct        *next;
  20 };
  21
  22 /*
  23  *      Highlevel APIs for driver use
  24  */
  25 extern void *vmalloc(unsigned long size);
  26 extern void *vmalloc_32(unsigned long size);
  27 extern void *__vmalloc(unsigned long size, int gfp_mask, pgprot_t prot);
  28 extern void vfree(void *addr);
  29
  30 extern void *vmap(struct page **pages, unsigned int count,
  31                         unsigned long flags, pgprot_t prot);
  32 extern void vunmap(void *addr);
  33
  34 /*
  35  *      Lowlevel-APIs (not for driver use!)
  36  */
  37 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
  38 extern struct vm_struct *remove_vm_area(void *addr);
  39 extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
  40                         struct page ***pages);
  41 extern void unmap_vm_area(struct vm_struct *area);
  42
  43 /*
  44  *      Internals.  Dont't use..
  45  */
  46 extern rwlock_t vmlist_lock;
  47 extern struct vm_struct *vmlist;
  48
  49 #endif /* _LINUX_VMALLOC_H */