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 /* bits [20..32] reserved for arch specific ioremap internals */
  12
  13 struct vm_struct {
  14         void                    *addr;
  15         unsigned long           size;
  16         unsigned long           flags;
  17         struct page             **pages;
  18         unsigned int            nr_pages;
  19         unsigned long           phys_addr;
  20         struct vm_struct        *next;
  21 };
  22
  23 /*
  24  *      Highlevel APIs for driver use
  25  */
  26 extern void *vmalloc(unsigned long size);
  27 extern void *vmalloc_exec(unsigned long size);
  28 extern void *vmalloc_32(unsigned long size);
  29 extern void *__vmalloc(unsigned long size, unsigned int __nocast gfp_mask, pgprot_t prot);
  30 extern void *__vmalloc_area(struct vm_struct *area, unsigned int __nocast gfp_mask, pgprot_t prot);
  31 extern void vfree(void *addr);
  32
  33 extern void *vmap(struct page **pages, unsigned int count,
  34                         unsigned long flags, pgprot_t prot);
  35 extern void vunmap(void *addr);
  36
  37 /*
  38  *      Lowlevel-APIs (not for driver use!)
  39  */
  40 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
  41 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
  42                                         unsigned long start, unsigned long end);
  43 extern struct vm_struct *remove_vm_area(void *addr);
  44 extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
  45                         struct page ***pages);
  46 extern void unmap_vm_area(struct vm_struct *area);
  47
  48 /*
  49  *      Internals.  Dont't use..
  50  */
  51 extern rwlock_t vmlist_lock;
  52 extern struct vm_struct *vmlist;
  53
  54 #endif /* _LINUX_VMALLOC_H */