| | 1 | #ifndef _LINUX_VMALLOC_H |
| | 2 | #define _LINUX_VMALLOC_H |
| | 3 | |
| | 4 | #include <linux/spinlock.h> |
| | 5 | #include <linux/init.h> |
| | 6 | #include <asm/page.h> /* pgprot_t */ |
| | 7 | |
| | 8 | struct vm_area_struct; /* vma defining user mapping in mm_types.h */ |
| | 9 | |
| | 10 | /* bits in flags of vmalloc's vm_struct below */ |
| | 11 | #define VM_IOREMAP 0x00000001 /* ioremap() and friends */ |
| | 12 | #define VM_ALLOC 0x00000002 /* vmalloc() */ |
| | 13 | #define VM_MAP 0x00000004 /* vmap()ed pages */ |
| | 14 | #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ |
| | 15 | #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */ |
| | 16 | /* bits [20..32] reserved for arch specific ioremap internals */ |
| | 17 | |
| | 18 | /* |
| | 19 | * Maximum alignment for ioremap() regions. |
| | 20 | * Can be overriden by arch-specific value. |
| | 21 | */ |
| | 22 | #ifndef IOREMAP_MAX_ORDER |
| | 23 | #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */ |
| | 24 | #endif |
| | 25 | |
| | 26 | struct vm_struct { |
| | 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 | void *caller; |
| | 35 | }; |
| | 36 | |
| | 37 | /* |
| | 38 | * Highlevel APIs for driver use |
| | 39 | */ |
| | 40 | extern void vm_unmap_ram(const void *mem, unsigned int count); |
| | 41 | extern void *vm_map_ram(struct page **pages, unsigned int count, |
| | 42 | int node, pgprot_t prot); |
| | 43 | extern void vm_unmap_aliases(void); |
| | 44 | |
| | 45 | #ifdef CONFIG_MMU |
| | 46 | extern void __init vmalloc_init(void); |
| | 47 | #else |
| | 48 | static inline void vmalloc_init(void) |
| | 49 | { |
| | 50 | } |
| | 51 | #endif |
| | 52 | |
| | 53 | extern void *vmalloc(unsigned long size); |
| | 54 | extern void *vmalloc_user(unsigned long size); |
| | 55 | extern void *vmalloc_node(unsigned long size, int node); |
| | 56 | extern void *vmalloc_exec(unsigned long size); |
| | 57 | extern void *vmalloc_32(unsigned long size); |
| | 58 | extern void *vmalloc_32_user(unsigned long size); |
| | 59 | extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); |
| | 60 | extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, |
| | 61 | pgprot_t prot); |
| | 62 | extern void vfree(const void *addr); |
| | 63 | |
| | 64 | extern void *vmap(struct page **pages, unsigned int count, |
| | 65 | unsigned long flags, pgprot_t prot); |
| | 66 | extern void vunmap(const void *addr); |
| | 67 | |
| | 68 | extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, |
| | 69 | unsigned long pgoff); |
| | 70 | void vmalloc_sync_all(void); |
| | 71 | |
| | 72 | /* |
| | 73 | * Lowlevel-APIs (not for driver use!) |
| | 74 | */ |
| | 75 | |
| | 76 | static inline size_t get_vm_area_size(const struct vm_struct *area) |
| | 77 | { |
| | 78 | /* return actual size without guard page */ |
| | 79 | return area->size - PAGE_SIZE; |
| | 80 | } |
| | 81 | |
| | 82 | extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); |
| | 83 | extern struct vm_struct *get_vm_area_caller(unsigned long size, |
| | 84 | unsigned long flags, void *caller); |
| | 85 | extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, |
| | 86 | unsigned long start, unsigned long end); |
| | 87 | extern struct vm_struct *__get_vm_area_caller(unsigned long size, |
| | 88 | unsigned long flags, |
| | 89 | unsigned long start, unsigned long end, |
| | 90 | void *caller); |
| | 91 | extern struct vm_struct *get_vm_area_node(unsigned long size, |
| | 92 | unsigned long flags, int node, |
| | 93 | gfp_t gfp_mask); |
| | 94 | extern struct vm_struct *remove_vm_area(const void *addr); |
| | 95 | |
| | 96 | extern int map_vm_area(struct vm_struct *area, pgprot_t prot, |
| | 97 | struct page ***pages); |
| | 98 | extern int map_kernel_range_noflush(unsigned long start, unsigned long size, |
| | 99 | pgprot_t prot, struct page **pages); |
| | 100 | extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size); |
| | 101 | extern void unmap_kernel_range(unsigned long addr, unsigned long size); |
| | 102 | |
| | 103 | /* Allocate/destroy a 'vmalloc' VM area. */ |
| | 104 | extern struct vm_struct *alloc_vm_area(size_t size); |
| | 105 | extern void free_vm_area(struct vm_struct *area); |
| | 106 | |
| | 107 | /* for /dev/kmem */ |
| | 108 | extern long vread(char *buf, char *addr, unsigned long count); |
| | 109 | extern long vwrite(char *buf, char *addr, unsigned long count); |
| | 110 | |
| | 111 | /* |
| | 112 | * Internals. Dont't use.. |
| | 113 | */ |
| | 114 | extern rwlock_t vmlist_lock; |
| | 115 | extern struct vm_struct *vmlist; |
| | 116 | extern __init void vm_area_register_early(struct vm_struct *vm, size_t align); |
| | 117 | |
| | 118 | struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, |
| | 119 | const size_t *sizes, int nr_vms, |
| | 120 | size_t align, gfp_t gfp_mask); |
| | 121 | |
| | 122 | void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms); |
| | 123 | |
| | 124 | #endif /* _LINUX_VMALLOC_H */ |
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