| #ifndef _LINUX_VMALLOC_H |
| #define _LINUX_VMALLOC_H |
| |
| #include <linux/spinlock.h> |
| #include <linux/init.h> |
| #include <asm/page.h> /* pgprot_t */ |
| |
| struct vm_area_struct; /* vma defining user mapping in mm_types.h */ |
| |
| /* bits in flags of vmalloc's vm_struct below */ |
| #define VM_IOREMAP 0x00000001 /* ioremap() and friends */ |
| #define VM_ALLOC 0x00000002 /* vmalloc() */ |
| #define VM_MAP 0x00000004 /* vmap()ed pages */ |
| #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ |
| #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */ |
| /* bits [20..32] reserved for arch specific ioremap internals */ |
| |
| /* |
| * Maximum alignment for ioremap() regions. |
| * Can be overriden by arch-specific value. |
| */ |
| #ifndef IOREMAP_MAX_ORDER |
| #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */ |
| #endif |
| |
| struct vm_struct { |
| struct vm_struct *next; |
| void *addr; |
| unsigned long size; |
| unsigned long flags; |
| struct page **pages; |
| unsigned int nr_pages; |
| unsigned long phys_addr; |
| void *caller; |
| }; |
| |
| /* |
| * Highlevel APIs for driver use |
| */ |
| extern void vm_unmap_ram(const void *mem, unsigned int count); |
| extern void *vm_map_ram(struct page **pages, unsigned int count, |
| int node, pgprot_t prot); |
| extern void vm_unmap_aliases(void); |
| |
| #ifdef CONFIG_MMU |
| extern void __init vmalloc_init(void); |
| #else |
| static inline void vmalloc_init(void) |
| { |
| } |
| #endif |
| |
| extern void *vmalloc(unsigned long size); |
| extern void *vmalloc_user(unsigned long size); |
| extern void *vmalloc_node(unsigned long size, int node); |
| extern void *vmalloc_exec(unsigned long size); |
| extern void *vmalloc_32(unsigned long size); |
| extern void *vmalloc_32_user(unsigned long size); |
| extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); |
| extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, |
| pgprot_t prot); |
| extern void vfree(const void *addr); |
| |
| extern void *vmap(struct page **pages, unsigned int count, |
| unsigned long flags, pgprot_t prot); |
| extern void vunmap(const void *addr); |
| |
| extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, |
| unsigned long pgoff); |
| void vmalloc_sync_all(void); |
| |
| /* |
| * Lowlevel-APIs (not for driver use!) |
| */ |
| |
| static inline size_t get_vm_area_size(const struct vm_struct *area) |
| { |
| /* return actual size without guard page */ |
| return area->size - PAGE_SIZE; |
| } |
| |
| extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); |
| extern struct vm_struct *get_vm_area_caller(unsigned long size, |
| unsigned long flags, void *caller); |
| extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, |
| unsigned long start, unsigned long end); |
| extern struct vm_struct *get_vm_area_node(unsigned long size, |
| unsigned long flags, int node, |
| gfp_t gfp_mask); |
| extern struct vm_struct *remove_vm_area(const void *addr); |
| |
| extern int map_vm_area(struct vm_struct *area, pgprot_t prot, |
| struct page ***pages); |
| extern int map_kernel_range_noflush(unsigned long start, unsigned long size, |
| pgprot_t prot, struct page **pages); |
| extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size); |
| extern void unmap_kernel_range(unsigned long addr, unsigned long size); |
| |
| /* Allocate/destroy a 'vmalloc' VM area. */ |
| extern struct vm_struct *alloc_vm_area(size_t size); |
| extern void free_vm_area(struct vm_struct *area); |
| |
| /* for /dev/kmem */ |
| extern long vread(char *buf, char *addr, unsigned long count); |
| extern long vwrite(char *buf, char *addr, unsigned long count); |
| |
| /* |
| * Internals. Dont't use.. |
| */ |
| extern rwlock_t vmlist_lock; |
| extern struct vm_struct *vmlist; |
| extern __init void vm_area_register_early(struct vm_struct *vm); |
| |
| #endif /* _LINUX_VMALLOC_H */ |