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 struct vm_area_struct; 8 9 /* bits in vm_struct->flags */ 10 #define VM_IOREMAP 0x00000001 /* ioremap() and friends */ 11 #define VM_ALLOC 0x00000002 /* vmalloc() */ 12 #define VM_MAP 0x00000004 /* vmap()ed pages */ 13 #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ 14 /* bits [20..32] reserved for arch specific ioremap internals */ 15 16 /* 17 * Maximum alignment for ioremap() regions. 18 * Can be overriden by arch-specific value. 19 */ 20 #ifndef IOREMAP_MAX_ORDER 21 #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */ 22 #endif 23 24 struct vm_struct { 25 void *addr; 26 unsigned long size; 27 unsigned long flags; 28 struct page **pages; 29 unsigned int nr_pages; 30 unsigned long phys_addr; 31 struct vm_struct *next; 32 }; 33 34 /* 35 * Highlevel APIs for driver use 36 */ 37 extern void *vmalloc(unsigned long size); 38 extern void *vmalloc_user(unsigned long size); 39 extern void *vmalloc_node(unsigned long size, int node); 40 extern void *vmalloc_exec(unsigned long size); 41 extern void *vmalloc_32(unsigned long size); 42 extern void *vmalloc_32_user(unsigned long size); 43 extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); 44 extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, 45 pgprot_t prot); 46 extern void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, 47 pgprot_t prot, int node); 48 extern void vfree(void *addr); 49 50 extern void *vmap(struct page **pages, unsigned int count, 51 unsigned long flags, pgprot_t prot); 52 extern void vunmap(void *addr); 53 54 extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, 55 unsigned long pgoff); 56 57 /* 58 * Lowlevel-APIs (not for driver use!) 59 */ 60 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); 61 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, 62 unsigned long start, unsigned long end); 63 extern struct vm_struct *get_vm_area_node(unsigned long size, 64 unsigned long flags, int node); 65 extern struct vm_struct *remove_vm_area(void *addr); 66 extern struct vm_struct *__remove_vm_area(void *addr); 67 extern int map_vm_area(struct vm_struct *area, pgprot_t prot, 68 struct page ***pages); 69 extern void unmap_vm_area(struct vm_struct *area); 70 71 /* 72 * Internals. Dont't use.. 73 */ 74 extern rwlock_t vmlist_lock; 75 extern struct vm_struct *vmlist; 76 77 #endif /* _LINUX_VMALLOC_H */ 78