vmalloc.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:2k
- #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 */
- /* bits [20..32] reserved for arch specific ioremap internals */
- /*
- * Maximum alignment for ioremap() regions.
- * Can be overriden by arch-specific value.
- */
- #ifndef IOREMAP_MAX_ORDER
- #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
- #endif
- 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_exec(unsigned long size);
- extern void *vmalloc_32(unsigned long size);
- extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
- extern void *__vmalloc_area(struct vm_struct *area, gfp_t 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 *__get_vm_area(unsigned long size, unsigned long flags,
- unsigned long start, unsigned long end);
- extern struct vm_struct *remove_vm_area(void *addr);
- 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 */