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 /* 14 * Maximum alignment for ioremap() regions. 15 * Can be overriden by arch-specific value. 16 */ 17 #ifndef IOREMAP_MAX_ORDER 18 #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */ 19 #endif 20 21 struct vm_struct { 22 void *addr; 23 unsigned long size; 24 unsigned long flags; 25 struct page **pages; 26 unsigned int nr_pages; 27 unsigned long phys_addr; 28 struct vm_struct *next; 29 }; 30 31 /* 32 * Highlevel APIs for driver use 33 */ 34 extern void *vmalloc(unsigned long size); 35 extern void *vmalloc_exec(unsigned long size); 36 extern void *vmalloc_32(unsigned long size); 37 extern void *__vmalloc(unsigned long size, unsigned int __nocast gfp_mask, pgprot_t prot); 38 extern void *__vmalloc_area(struct vm_struct *area, unsigned int __nocast gfp_mask, pgprot_t prot); 39 extern void vfree(void *addr); 40 41 extern void *vmap(struct page **pages, unsigned int count, 42 unsigned long flags, pgprot_t prot); 43 extern void vunmap(void *addr); 44 45 /* 46 * Lowlevel-APIs (not for driver use!) 47 */ 48 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); 49 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, 50 unsigned long start, unsigned long end); 51 extern struct vm_struct *remove_vm_area(void *addr); 52 extern struct vm_struct *__remove_vm_area(void *addr); 53 extern int map_vm_area(struct vm_struct *area, pgprot_t prot, 54 struct page ***pages); 55 extern void unmap_vm_area(struct vm_struct *area); 56 57 /* 58 * Internals. Dont't use.. 59 */ 60 extern rwlock_t vmlist_lock; 61 extern struct vm_struct *vmlist; 62 63 #endif /* _LINUX_VMALLOC_H */ 64