1 files changed, 171 insertions, 0 deletions
diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h
new file mode 100644
index 000000000..5fcc8a600
--- /dev/null
+++ b/arch/arm/include/asm/page.h
@@ -0,0 +1,171 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  arch/arm/include/asm/page.h
+ *
+ *  Copyright (C) 1995-2003 Russell King
+ */
+#ifndef _ASMARM_PAGE_H
+#define _ASMARM_PAGE_H
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT		12
+#define PAGE_SIZE		(_AC(1,UL) << PAGE_SHIFT)
+#define PAGE_MASK		(~((1 << PAGE_SHIFT) - 1))
+
+#ifndef __ASSEMBLY__
+
+#ifndef CONFIG_MMU
+
+#include <asm/page-nommu.h>
+
+#else
+
+#include <asm/glue.h>
+
+/*
+ *	User Space Model
+ *	================
+ *
+ *	This section selects the correct set of functions for dealing with
+ *	page-based copying and clearing for user space for the particular
+ *	processor(s) we're building for.
+ *
+ *	We have the following to choose from:
+ *	  v4wt		- ARMv4 with writethrough cache, without minicache
+ *	  v4wb		- ARMv4 with writeback cache, without minicache
+ *	  v4_mc		- ARMv4 with minicache
+ *	  xscale	- Xscale
+ *	  xsc3		- XScalev3
+ */
+#undef _USER
+#undef MULTI_USER
+
+#ifdef CONFIG_CPU_COPY_V4WT
+# ifdef _USER
+#  define MULTI_USER 1
+# else
+#  define _USER v4wt
+# endif
+#endif
+
+#ifdef CONFIG_CPU_COPY_V4WB
+# ifdef _USER
+#  define MULTI_USER 1
+# else
+#  define _USER v4wb
+# endif
+#endif
+
+#ifdef CONFIG_CPU_COPY_FEROCEON
+# ifdef _USER
+#  define MULTI_USER 1
+# else
+#  define _USER feroceon
+# endif
+#endif
+
+#ifdef CONFIG_CPU_COPY_FA
+# ifdef _USER
+#  define MULTI_USER 1
+# else
+#  define _USER fa
+# endif
+#endif
+
+#ifdef CONFIG_CPU_SA1100
+# ifdef _USER
+#  define MULTI_USER 1
+# else
+#  define _USER v4_mc
+# endif
+#endif
+
+#ifdef CONFIG_CPU_XSCALE
+# ifdef _USER
+#  define MULTI_USER 1
+# else
+#  define _USER xscale_mc
+# endif
+#endif
+
+#ifdef CONFIG_CPU_XSC3
+# ifdef _USER
+#  define MULTI_USER 1
+# else
+#  define _USER xsc3_mc
+# endif
+#endif
+
+#ifdef CONFIG_CPU_COPY_V6
+# define MULTI_USER 1
+#endif
+
+#if !defined(_USER) && !defined(MULTI_USER)
+#error Unknown user operations model
+#endif
+
+struct page;
+struct vm_area_struct;
+
+struct cpu_user_fns {
+	void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr);
+	void (*cpu_copy_user_highpage)(struct page *to, struct page *from,
+			unsigned long vaddr, struct vm_area_struct *vma);
+};
+
+#ifdef MULTI_USER
+extern struct cpu_user_fns cpu_user;
+
+#define __cpu_clear_user_highpage	cpu_user.cpu_clear_user_highpage
+#define __cpu_copy_user_highpage	cpu_user.cpu_copy_user_highpage
+
+#else
+
+#define __cpu_clear_user_highpage	__glue(_USER,_clear_user_highpage)
+#define __cpu_copy_user_highpage	__glue(_USER,_copy_user_highpage)
+
+extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
+extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
+			unsigned long vaddr, struct vm_area_struct *vma);
+#endif
+
+#define clear_user_highpage(page,vaddr)		\
+	 __cpu_clear_user_highpage(page, vaddr)
+
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+#define copy_user_highpage(to,from,vaddr,vma)	\
+	__cpu_copy_user_highpage(to, from, vaddr, vma)
+
+#define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
+extern void copy_page(void *to, const void *from);
+
+#ifdef CONFIG_KUSER_HELPERS
+#define __HAVE_ARCH_GATE_AREA 1
+#endif
+
+#ifdef CONFIG_ARM_LPAE
+#include <asm/pgtable-3level-types.h>
+#else
+#include <asm/pgtable-2level-types.h>
+#ifdef CONFIG_VMAP_STACK
+#define ARCH_PAGE_TABLE_SYNC_MASK	PGTBL_PMD_MODIFIED
+#endif
+#endif
+
+#endif /* CONFIG_MMU */
+
+typedef struct page *pgtable_t;
+
+#ifdef CONFIG_HAVE_ARCH_PFN_VALID
+extern int pfn_valid(unsigned long);
+#endif
+
+#include <asm/memory.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
+
+#include <asm-generic/getorder.h>
+
+#endif