1#ifndef _LINUX_VMALLOC_H 2#define _LINUX_VMALLOC_H 3 4#include <linux/spinlock.h> 5#include <asm/page.h> /* pgprot_t */ 6 7struct 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 25struct vm_struct { 26 /* keep next,addr,size together to speedup lookups */ 27 struct vm_struct *next; 28 void *addr; 29 unsigned long size; 30 unsigned long flags; 31 struct page **pages; 32 unsigned int nr_pages; 33 unsigned long phys_addr; 34}; 35 36/* 37 * Highlevel APIs for driver use 38 */ 39extern void *vmalloc(unsigned long size); 40extern void *vmalloc_user(unsigned long size); 41extern void *vmalloc_node(unsigned long size, int node); 42extern void *vmalloc_exec(unsigned long size); 43extern void *vmalloc_32(unsigned long size); 44extern void *vmalloc_32_user(unsigned long size); 45extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); 46extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, 47 pgprot_t prot); 48extern void vfree(void *addr); 49 50extern void *vmap(struct page **pages, unsigned int count, 51 unsigned long flags, pgprot_t prot); 52extern void vunmap(void *addr); 53 54extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, 55 unsigned long pgoff); 56void vmalloc_sync_all(void); 57 58/* 59 * Lowlevel-APIs (not for driver use!) 60 */ 61extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); 62extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, 63 unsigned long start, unsigned long end); 64extern struct vm_struct *get_vm_area_node(unsigned long size, 65 unsigned long flags, int node, 66 gfp_t gfp_mask); 67extern struct vm_struct *remove_vm_area(void *addr); 68extern int map_vm_area(struct vm_struct *area, pgprot_t prot, 69 struct page ***pages); 70extern void unmap_vm_area(struct vm_struct *area); 71 72/* 73 * Internals. Dont't use.. 74 */ 75extern rwlock_t vmlist_lock; 76extern struct vm_struct *vmlist; 77 78#endif /* _LINUX_VMALLOC_H */ 79