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 #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */ 15 /* bits [20..32] reserved for arch specific ioremap internals */ 16 17 /* 18 * Maximum alignment for ioremap() regions. 19 * Can be overriden by arch-specific value. 20 */ 21 #ifndef IOREMAP_MAX_ORDER 22 #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */ 23 #endif 24 25 struct vm_struct { 26 void *addr; 27 unsigned long size; 28 unsigned long flags; 29 struct page **pages; 30 unsigned int nr_pages; 31 unsigned long phys_addr; 32 struct vm_struct *next; 33 }; 34 35 /* 36 * Highlevel APIs for driver use 37 */ 38 extern void *vmalloc(unsigned long size); 39 extern void *vmalloc_user(unsigned long size); 40 extern void *vmalloc_node(unsigned long size, int node); 41 extern void *vmalloc_exec(unsigned long size); 42 extern void *vmalloc_32(unsigned long size); 43 extern void *vmalloc_32_user(unsigned long size); 44 extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); 45 extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, 46 pgprot_t prot); 47 extern void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, 48 pgprot_t prot, int node); 49 extern void vfree(void *addr); 50 51 extern void *vmap(struct page **pages, unsigned int count, 52 unsigned long flags, pgprot_t prot); 53 extern void vunmap(void *addr); 54 55 extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, 56 unsigned long pgoff); 57 58 /* 59 * Lowlevel-APIs (not for driver use!) 60 */ 61 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); 62 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, 63 unsigned long start, unsigned long end); 64 extern struct vm_struct *get_vm_area_node(unsigned long size, 65 unsigned long flags, int node); 66 extern struct vm_struct *remove_vm_area(void *addr); 67 extern struct vm_struct *__remove_vm_area(void *addr); 68 extern int map_vm_area(struct vm_struct *area, pgprot_t prot, 69 struct page ***pages); 70 extern void unmap_vm_area(struct vm_struct *area); 71 72 /* 73 * Internals. Dont't use.. 74 */ 75 extern rwlock_t vmlist_lock; 76 extern struct vm_struct *vmlist; 77 78 #endif /* _LINUX_VMALLOC_H */ 79