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#ifndef _LINUX_VMALLOC_H
#define _LINUX_VMALLOC_H

#include <linux/spinlock.h>
#include <asm/page.h>           /* pgprot_t */

/* bits in vm_struct->flags */
#define VM_IOREMAP      0x00000001      /* ioremap() and friends */
#define VM_ALLOC        0x00000002      /* vmalloc() */
#define VM_MAP          0x00000004      /* vmap()ed pages */

struct vm_struct {
        void                    *addr;
        unsigned long           size;
        unsigned long           flags;
        struct page             **pages;
        unsigned int            nr_pages;
        unsigned long           phys_addr;
        struct vm_struct        *next;
};

/*
 *      Highlevel APIs for driver use
 */
extern void *vmalloc(unsigned long size);
extern void *vmalloc_32(unsigned long size);
extern void *__vmalloc(unsigned long size, int gfp_mask, pgprot_t prot);
extern void vfree(void *addr);

extern void *vmap(struct page **pages, unsigned int count,
                        unsigned long flags, pgprot_t prot);
extern void vunmap(void *addr);
 
/*
 *      Lowlevel-APIs (not for driver use!)
 */
extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
extern struct vm_struct *remove_vm_area(void *addr);
extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
                        struct page ***pages);
extern void unmap_vm_area(struct vm_struct *area);

/*
 *      Internals.  Dont't use..
 */
extern rwlock_t vmlist_lock;
extern struct vm_struct *vmlist;

#endif /* _LINUX_VMALLOC_H */