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422 giacomo 1
#ifndef _LINUX_VMALLOC_H
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#define _LINUX_VMALLOC_H
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#include <linux/spinlock.h>
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#include <asm/page.h>           /* pgprot_t */
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/* bits in vm_struct->flags */
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#define VM_IOREMAP      0x00000001      /* ioremap() and friends */
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#define VM_ALLOC        0x00000002      /* vmalloc() */
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#define VM_MAP          0x00000004      /* vmap()ed pages */
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struct vm_struct {
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        void                    *addr;
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        unsigned long           size;
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        unsigned long           flags;
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        struct page             **pages;
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        unsigned int            nr_pages;
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        unsigned long           phys_addr;
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        struct vm_struct        *next;
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};
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/*
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 *      Highlevel APIs for driver use
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 */
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extern void *vmalloc(unsigned long size);
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extern void *vmalloc_32(unsigned long size);
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extern void *vmalloc_32_usb(unsigned long size);
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extern void *__vmalloc(unsigned long size, int gfp_mask, pgprot_t prot);
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extern void vfree(void *addr);
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extern void vfree_usb(void *addr);
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extern void *vmap(struct page **pages, unsigned int count,
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                        unsigned long flags, pgprot_t prot);
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extern void vunmap(void *addr);
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/*
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 *      Lowlevel-APIs (not for driver use!)
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 */
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extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
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extern struct vm_struct *remove_vm_area(void *addr);
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extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
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                        struct page ***pages);
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extern void unmap_vm_area(struct vm_struct *area);
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/*
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 *      Internals.  Dont't use..
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 */
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extern rwlock_t vmlist_lock;
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extern struct vm_struct *vmlist;
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#endif /* _LINUX_VMALLOC_H */