1 files changed, 197 insertions, 0 deletions

diff --git a/include/asm-arm/page.h b/include/asm-arm/page.h
new file mode 100644
index 000000000000..4ca3a8e9348f
--- /dev/null
+++ b/include/asm-arm/page.h
@@ -0,0 +1,197 @@
+/*
+ *  linux/include/asm-arm/page.h
+ *
+ *  Copyright (C) 1995-2003 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASMARM_PAGE_H
+#define _ASMARM_PAGE_H
+
+#include <linux/config.h>
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT              12
+#define PAGE_SIZE               (1UL << PAGE_SHIFT)
+#define PAGE_MASK               (~(PAGE_SIZE-1))
+
+#ifdef __KERNEL__
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+#ifndef __ASSEMBLY__
+
+#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:
+ *        v3            - ARMv3
+ *        v4wt          - ARMv4 with writethrough cache, without minicache
+ *        v4wb          - ARMv4 with writeback cache, without minicache
+ *        v4_mc         - ARMv4 with minicache
+ *        xscale        - Xscale
+ */
+#undef _USER
+#undef MULTI_USER
+
+#ifdef CONFIG_CPU_COPY_V3
+# ifdef _USER
+#  define MULTI_USER 1
+# else
+#  define _USER v3
+# endif
+#endif
+
+#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_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_COPY_V6
+# define MULTI_USER 1
+#endif
+
+#if !defined(_USER) && !defined(MULTI_USER)
+#error Unknown user operations model
+#endif
+
+struct cpu_user_fns {
+        void (*cpu_clear_user_page)(void *p, unsigned long user);
+        void (*cpu_copy_user_page)(void *to, const void *from,
+                                   unsigned long user);
+};
+
+#ifdef MULTI_USER
+extern struct cpu_user_fns cpu_user;
+
+#define __cpu_clear_user_page   cpu_user.cpu_clear_user_page
+#define __cpu_copy_user_page    cpu_user.cpu_copy_user_page
+
+#else
+
+#define __cpu_clear_user_page   __glue(_USER,_clear_user_page)
+#define __cpu_copy_user_page    __glue(_USER,_copy_user_page)
+
+extern void __cpu_clear_user_page(void *p, unsigned long user);
+extern void __cpu_copy_user_page(void *to, const void *from,
+                                 unsigned long user);
+#endif
+
+#define clear_user_page(addr,vaddr,pg)                  \
+        do {                                            \
+                preempt_disable();                      \
+                __cpu_clear_user_page(addr, vaddr);     \
+                preempt_enable();                       \
+        } while (0)
+
+#define copy_user_page(to,from,vaddr,pg)                \
+        do {                                            \
+                preempt_disable();                      \
+                __cpu_copy_user_page(to, from, vaddr);  \
+                preempt_enable();                       \
+        } while (0)
+
+#define clear_page(page)        memzero((void *)(page), PAGE_SIZE)
+extern void copy_page(void *to, const void *from);
+
+#undef STRICT_MM_TYPECHECKS
+
+#ifdef STRICT_MM_TYPECHECKS
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pmd; } pmd_t;
+typedef struct { unsigned long pgd[2]; } pgd_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+
+#define pte_val(x)      ((x).pte)
+#define pmd_val(x)      ((x).pmd)
+#define pgd_val(x)      ((x).pgd[0])
+#define pgprot_val(x)   ((x).pgprot)
+
+#define __pte(x)        ((pte_t) { (x) } )
+#define __pmd(x)        ((pmd_t) { (x) } )
+#define __pgprot(x)     ((pgprot_t) { (x) } )
+
+#else
+/*
+ * .. while these make it easier on the compiler
+ */
+typedef unsigned long pte_t;
+typedef unsigned long pmd_t;
+typedef unsigned long pgd_t[2];
+typedef unsigned long pgprot_t;
+
+#define pte_val(x)      (x)
+#define pmd_val(x)      (x)
+#define pgd_val(x)      ((x)[0])
+#define pgprot_val(x)   (x)
+
+#define __pte(x)        (x)
+#define __pmd(x)        (x)
+#define __pgprot(x)     (x)
+
+#endif /* STRICT_MM_TYPECHECKS */
+
+/* Pure 2^n version of get_order */
+static inline int get_order(unsigned long size)
+{
+        int order;
+
+        size = (size-1) >> (PAGE_SHIFT-1);
+        order = -1;
+        do {
+                size >>= 1;
+                order++;
+        } while (size);
+        return order;
+}
+
+#include <asm/memory.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
+                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#endif /* __KERNEL__ */
+
+#endif