Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_VMALLOC_H |
| 2 | #define _LINUX_VMALLOC_H |
| 3 | |
| 4 | #include <linux/spinlock.h> |
| 5 | #include <asm/page.h> /* pgprot_t */ |
| 6 | |
Nick Piggin | 8334231 | 2006-06-23 02:03:20 -0700 | [diff] [blame] | 7 | struct vm_area_struct; |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Nick Piggin | 8334231 | 2006-06-23 02:03:20 -0700 | [diff] [blame] | 13 | #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ |
Jan Kiszka | 8757d5f | 2006-07-14 00:23:56 -0700 | [diff] [blame] | 14 | #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | /* bits [20..32] reserved for arch specific ioremap internals */ |
| 16 | |
Deepak Saxena | fd195c4 | 2005-09-03 15:54:58 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | struct vm_struct { |
Eric Dumazet | 2b4ac44 | 2006-11-10 12:27:48 -0800 | [diff] [blame] | 26 | /* keep next,addr,size together to speedup lookups */ |
| 27 | struct vm_struct *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | }; |
| 35 | |
| 36 | /* |
| 37 | * Highlevel APIs for driver use |
| 38 | */ |
| 39 | extern void *vmalloc(unsigned long size); |
Nick Piggin | 8334231 | 2006-06-23 02:03:20 -0700 | [diff] [blame] | 40 | extern void *vmalloc_user(unsigned long size); |
Christoph Lameter | 930fc45 | 2005-10-29 18:15:41 -0700 | [diff] [blame] | 41 | extern void *vmalloc_node(unsigned long size, int node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | extern void *vmalloc_exec(unsigned long size); |
| 43 | extern void *vmalloc_32(unsigned long size); |
Nick Piggin | 8334231 | 2006-06-23 02:03:20 -0700 | [diff] [blame] | 44 | extern void *vmalloc_32_user(unsigned long size); |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 45 | extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); |
Christoph Lameter | 930fc45 | 2005-10-29 18:15:41 -0700 | [diff] [blame] | 46 | extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, |
| 47 | pgprot_t prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Nick Piggin | 8334231 | 2006-06-23 02:03:20 -0700 | [diff] [blame] | 53 | |
| 54 | extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, |
| 55 | unsigned long pgoff); |
Christoph Hellwig | 1eeb66a | 2007-05-08 00:27:03 -0700 | [diff] [blame] | 56 | void vmalloc_sync_all(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Christoph Lameter | 930fc45 | 2005-10-29 18:15:41 -0700 | [diff] [blame] | 64 | extern struct vm_struct *get_vm_area_node(unsigned long size, |
Giridhar Pemmasani | 52fd24c | 2006-10-28 10:38:34 -0700 | [diff] [blame] | 65 | unsigned long flags, int node, |
| 66 | gfp_t gfp_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | extern struct vm_struct *remove_vm_area(void *addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |