Initial import

1 files changed, 203 insertions, 0 deletions

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
new file mode 100644
index 000000000..0ec598381
--- /dev/null
+++ b/include/linux/vmalloc.h
@@ -0,0 +1,203 @@
+#ifndef _LINUX_VMALLOC_H
+#define _LINUX_VMALLOC_H
+
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <asm/page.h>		/* pgprot_t */
+#include <linux/rbtree.h>
+
+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 */
+#define VM_UNINITIALIZED	0x00000020	/* vm_struct is not fully initialized */
+#define VM_NO_GUARD		0x00000040      /* don't add guard page */
+#define VM_KASAN		0x00000080      /* has allocated kasan shadow memory */
+/* 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;
+	phys_addr_t		phys_addr;
+	const void		*caller;
+};
+
+struct vmap_area {
+	unsigned long va_start;
+	unsigned long va_end;
+	unsigned long flags;
+	struct rb_node rb_node;         /* address sorted rbtree */
+	struct list_head list;          /* address sorted list */
+	struct list_head purge_list;    /* "lazy purge" list */
+	struct vm_struct *vm;
+	struct rcu_head rcu_head;
+};
+
+/*
+ *	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 *vzalloc(unsigned long size);
+extern void *vmalloc_user(unsigned long size);
+extern void *vmalloc_node(unsigned long size, int node);
+extern void *vzalloc_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_node_range(unsigned long size, unsigned long align,
+			unsigned long start, unsigned long end, gfp_t gfp_mask,
+			pgprot_t prot, unsigned long vm_flags, int node,
+			const void *caller);
+
+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_partial(struct vm_area_struct *vma,
+				       unsigned long uaddr, void *kaddr,
+				       unsigned long size);
+
+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)
+{
+	if (!(area->flags & VM_NO_GUARD))
+		/* return actual size without guard page */
+		return area->size - PAGE_SIZE;
+	else
+		return area->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, const 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_caller(unsigned long size,
+					unsigned long flags,
+					unsigned long start, unsigned long end,
+					const void *caller);
+extern struct vm_struct *remove_vm_area(const void *addr);
+extern struct vm_struct *find_vm_area(const void *addr);
+
+extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
+			struct page **pages);
+#ifdef CONFIG_MMU
+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);
+#else
+static inline int
+map_kernel_range_noflush(unsigned long start, unsigned long size,
+			pgprot_t prot, struct page **pages)
+{
+	return size >> PAGE_SHIFT;
+}
+static inline void
+unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
+{
+}
+static inline void
+unmap_kernel_range(unsigned long addr, unsigned long size)
+{
+}
+#endif
+
+/* Allocate/destroy a 'vmalloc' VM area. */
+extern struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes);
+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 struct list_head vmap_area_list;
+extern __init void vm_area_add_early(struct vm_struct *vm);
+extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
+
+#ifdef CONFIG_SMP
+# ifdef CONFIG_MMU
+struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
+				     const size_t *sizes, int nr_vms,
+				     size_t align);
+
+void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms);
+# else
+static inline struct vm_struct **
+pcpu_get_vm_areas(const unsigned long *offsets,
+		const size_t *sizes, int nr_vms,
+		size_t align)
+{
+	return NULL;
+}
+
+static inline void
+pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
+{
+}
+# endif
+#endif
+
+struct vmalloc_info {
+	unsigned long   used;
+	unsigned long   largest_chunk;
+};
+
+#ifdef CONFIG_MMU
+#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
+extern void get_vmalloc_info(struct vmalloc_info *vmi);
+#else
+
+#define VMALLOC_TOTAL 0UL
+#define get_vmalloc_info(vmi)			\
+do {						\
+	(vmi)->used = 0;			\
+	(vmi)->largest_chunk = 0;		\
+} while (0)
+#endif
+
+#endif /* _LINUX_VMALLOC_H */