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diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h
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-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- */
-
-#ifndef _ASM_TILE_UACCESS_H
-#define _ASM_TILE_UACCESS_H
-
-/*
- * User space memory access functions
- */
-#include <linux/mm.h>
-#include <asm/processor.h>
-#include <asm/page.h>
-
-/*
- * The fs value determines whether argument validity checking should be
- * performed or not. If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons, these macros are grossly misnamed.
- */
-#define MAKE_MM_SEG(a) ((mm_segment_t) { (a) })
-
-#define KERNEL_DS MAKE_MM_SEG(-1UL)
-#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
-
-#define get_ds() (KERNEL_DS)
-#define get_fs() (current_thread_info()->addr_limit)
-#define set_fs(x) (current_thread_info()->addr_limit = (x))
-
-#define segment_eq(a, b) ((a).seg == (b).seg)
-
-#ifndef __tilegx__
-/*
- * We could allow mapping all 16 MB at 0xfc000000, but we set up a
- * special hack in arch_setup_additional_pages() to auto-create a mapping
- * for the first 16 KB, and it would seem strange to have different
- * user-accessible semantics for memory at 0xfc000000 and above 0xfc004000.
- */
-static inline int is_arch_mappable_range(unsigned long addr,
- unsigned long size)
-{
- return (addr >= MEM_USER_INTRPT &&
- addr < (MEM_USER_INTRPT + INTRPT_SIZE) &&
- size <= (MEM_USER_INTRPT + INTRPT_SIZE) - addr);
-}
-#define is_arch_mappable_range is_arch_mappable_range
-#else
-#define is_arch_mappable_range(addr, size) 0
-#endif
-
-/*
- * Note that using this definition ignores is_arch_mappable_range(),
- * so on tilepro code that uses user_addr_max() is constrained not
- * to reference the tilepro user-interrupt region.
- */
-#define user_addr_max() (current_thread_info()->addr_limit.seg)
-
-/*
- * Test whether a block of memory is a valid user space address.
- * Returns 0 if the range is valid, nonzero otherwise.
- */
-int __range_ok(unsigned long addr, unsigned long size);
-
-/**
- * access_ok: - Checks if a user space pointer is valid
- * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE. Note that
- * %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe
- * to write to a block, it is always safe to read from it.
- * @addr: User space pointer to start of block to check
- * @size: Size of block to check
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Checks if a pointer to a block of memory in user space is valid.
- *
- * Returns true (nonzero) if the memory block may be valid, false (zero)
- * if it is definitely invalid.
- *
- * Note that, depending on architecture, this function probably just
- * checks that the pointer is in the user space range - after calling
- * this function, memory access functions may still return -EFAULT.
- */
-#define access_ok(type, addr, size) ({ \
- __chk_user_ptr(addr); \
- likely(__range_ok((unsigned long)(addr), (size)) == 0); \
-})
-
-#include <asm/extable.h>
-
-/*
- * This is a type: either unsigned long, if the argument fits into
- * that type, or otherwise unsigned long long.
- */
-#define __inttype(x) \
- __typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL))
-
-/*
- * Support macros for __get_user().
- * Note that __get_user() and __put_user() assume proper alignment.
- */
-
-#ifdef __LP64__
-#define _ASM_PTR ".quad"
-#define _ASM_ALIGN ".align 8"
-#else
-#define _ASM_PTR ".long"
-#define _ASM_ALIGN ".align 4"
-#endif
-
-#define __get_user_asm(OP, x, ptr, ret) \
- asm volatile("1: {" #OP " %1, %2; movei %0, 0 }\n" \
- ".pushsection .fixup,\"ax\"\n" \
- "0: { movei %1, 0; movei %0, %3 }\n" \
- "j 9f\n" \
- ".section __ex_table,\"a\"\n" \
- _ASM_ALIGN "\n" \
- _ASM_PTR " 1b, 0b\n" \
- ".popsection\n" \
- "9:" \
- : "=r" (ret), "=r" (x) \
- : "r" (ptr), "i" (-EFAULT))
-
-#ifdef __tilegx__
-#define __get_user_1(x, ptr, ret) __get_user_asm(ld1u, x, ptr, ret)
-#define __get_user_2(x, ptr, ret) __get_user_asm(ld2u, x, ptr, ret)
-#define __get_user_4(x, ptr, ret) __get_user_asm(ld4s, x, ptr, ret)
-#define __get_user_8(x, ptr, ret) __get_user_asm(ld, x, ptr, ret)
-#else
-#define __get_user_1(x, ptr, ret) __get_user_asm(lb_u, x, ptr, ret)
-#define __get_user_2(x, ptr, ret) __get_user_asm(lh_u, x, ptr, ret)
-#define __get_user_4(x, ptr, ret) __get_user_asm(lw, x, ptr, ret)
-#ifdef __LITTLE_ENDIAN
-#define __lo32(a, b) a
-#define __hi32(a, b) b
-#else
-#define __lo32(a, b) b
-#define __hi32(a, b) a
-#endif
-#define __get_user_8(x, ptr, ret) \
- ({ \
- unsigned int __a, __b; \
- asm volatile("1: { lw %1, %3; addi %2, %3, 4 }\n" \
- "2: { lw %2, %2; movei %0, 0 }\n" \
- ".pushsection .fixup,\"ax\"\n" \
- "0: { movei %1, 0; movei %2, 0 }\n" \
- "{ movei %0, %4; j 9f }\n" \
- ".section __ex_table,\"a\"\n" \
- ".align 4\n" \
- ".word 1b, 0b\n" \
- ".word 2b, 0b\n" \
- ".popsection\n" \
- "9:" \
- : "=r" (ret), "=r" (__a), "=&r" (__b) \
- : "r" (ptr), "i" (-EFAULT)); \
- (x) = (__force __typeof(x))(__inttype(x)) \
- (((u64)__hi32(__a, __b) << 32) | \
- __lo32(__a, __b)); \
- })
-#endif
-
-extern int __get_user_bad(void)
- __attribute__((warning("sizeof __get_user argument not 1, 2, 4 or 8")));
-
-/**
- * __get_user: - Get a simple variable from user space, with less checking.
- * @x: Variable to store result.
- * @ptr: Source address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * This macro copies a single simple variable from user space to kernel
- * space. It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and the result of
- * dereferencing @ptr must be assignable to @x without a cast.
- *
- * Returns zero on success, or -EFAULT on error.
- * On error, the variable @x is set to zero.
- *
- * Caller must check the pointer with access_ok() before calling this
- * function.
- */
-#define __get_user(x, ptr) \
- ({ \
- int __ret; \
- typeof(x) _x; \
- __chk_user_ptr(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: __get_user_1(_x, ptr, __ret); break; \
- case 2: __get_user_2(_x, ptr, __ret); break; \
- case 4: __get_user_4(_x, ptr, __ret); break; \
- case 8: __get_user_8(_x, ptr, __ret); break; \
- default: __ret = __get_user_bad(); break; \
- } \
- (x) = (typeof(*(ptr))) _x; \
- __ret; \
- })
-
-/* Support macros for __put_user(). */
-
-#define __put_user_asm(OP, x, ptr, ret) \
- asm volatile("1: {" #OP " %1, %2; movei %0, 0 }\n" \
- ".pushsection .fixup,\"ax\"\n" \
- "0: { movei %0, %3; j 9f }\n" \
- ".section __ex_table,\"a\"\n" \
- _ASM_ALIGN "\n" \
- _ASM_PTR " 1b, 0b\n" \
- ".popsection\n" \
- "9:" \
- : "=r" (ret) \
- : "r" (ptr), "r" (x), "i" (-EFAULT))
-
-#ifdef __tilegx__
-#define __put_user_1(x, ptr, ret) __put_user_asm(st1, x, ptr, ret)
-#define __put_user_2(x, ptr, ret) __put_user_asm(st2, x, ptr, ret)
-#define __put_user_4(x, ptr, ret) __put_user_asm(st4, x, ptr, ret)
-#define __put_user_8(x, ptr, ret) __put_user_asm(st, x, ptr, ret)
-#else
-#define __put_user_1(x, ptr, ret) __put_user_asm(sb, x, ptr, ret)
-#define __put_user_2(x, ptr, ret) __put_user_asm(sh, x, ptr, ret)
-#define __put_user_4(x, ptr, ret) __put_user_asm(sw, x, ptr, ret)
-#define __put_user_8(x, ptr, ret) \
- ({ \
- u64 __x = (__force __inttype(x))(x); \
- int __lo = (int) __x, __hi = (int) (__x >> 32); \
- asm volatile("1: { sw %1, %2; addi %0, %1, 4 }\n" \
- "2: { sw %0, %3; movei %0, 0 }\n" \
- ".pushsection .fixup,\"ax\"\n" \
- "0: { movei %0, %4; j 9f }\n" \
- ".section __ex_table,\"a\"\n" \
- ".align 4\n" \
- ".word 1b, 0b\n" \
- ".word 2b, 0b\n" \
- ".popsection\n" \
- "9:" \
- : "=&r" (ret) \
- : "r" (ptr), "r" (__lo32(__lo, __hi)), \
- "r" (__hi32(__lo, __hi)), "i" (-EFAULT)); \
- })
-#endif
-
-extern int __put_user_bad(void)
- __attribute__((warning("sizeof __put_user argument not 1, 2, 4 or 8")));
-
-/**
- * __put_user: - Write a simple value into user space, with less checking.
- * @x: Value to copy to user space.
- * @ptr: Destination address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * This macro copies a single simple value from kernel space to user
- * space. It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and @x must be assignable
- * to the result of dereferencing @ptr.
- *
- * Caller must check the pointer with access_ok() before calling this
- * function.
- *
- * Returns zero on success, or -EFAULT on error.
- */
-#define __put_user(x, ptr) \
-({ \
- int __ret; \
- typeof(*(ptr)) _x = (x); \
- __chk_user_ptr(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: __put_user_1(_x, ptr, __ret); break; \
- case 2: __put_user_2(_x, ptr, __ret); break; \
- case 4: __put_user_4(_x, ptr, __ret); break; \
- case 8: __put_user_8(_x, ptr, __ret); break; \
- default: __ret = __put_user_bad(); break; \
- } \
- __ret; \
-})
-
-/*
- * The versions of get_user and put_user without initial underscores
- * check the address of their arguments to make sure they are not
- * in kernel space.
- */
-#define put_user(x, ptr) \
-({ \
- __typeof__(*(ptr)) __user *__Pu_addr = (ptr); \
- access_ok(VERIFY_WRITE, (__Pu_addr), sizeof(*(__Pu_addr))) ? \
- __put_user((x), (__Pu_addr)) : \
- -EFAULT; \
-})
-
-#define get_user(x, ptr) \
-({ \
- __typeof__(*(ptr)) const __user *__Gu_addr = (ptr); \
- access_ok(VERIFY_READ, (__Gu_addr), sizeof(*(__Gu_addr))) ? \
- __get_user((x), (__Gu_addr)) : \
- ((x) = 0, -EFAULT); \
-})
-
-extern unsigned long __must_check
-raw_copy_to_user(void __user *to, const void *from, unsigned long n);
-extern unsigned long __must_check
-raw_copy_from_user(void *to, const void __user *from, unsigned long n);
-#define INLINE_COPY_FROM_USER
-#define INLINE_COPY_TO_USER
-
-#ifdef __tilegx__
-extern unsigned long raw_copy_in_user(
- void __user *to, const void __user *from, unsigned long n);
-#endif
-
-
-extern long strnlen_user(const char __user *str, long n);
-extern long strncpy_from_user(char *dst, const char __user *src, long);
-
-/**
- * clear_user: - Zero a block of memory in user space.
- * @mem: Destination address, in user space.
- * @len: Number of bytes to zero.
- *
- * Zero a block of memory in user space.
- *
- * Returns number of bytes that could not be cleared.
- * On success, this will be zero.
- */
-extern unsigned long clear_user_asm(void __user *mem, unsigned long len);
-static inline unsigned long __must_check __clear_user(
- void __user *mem, unsigned long len)
-{
- might_fault();
- return clear_user_asm(mem, len);
-}
-static inline unsigned long __must_check clear_user(
- void __user *mem, unsigned long len)
-{
- if (access_ok(VERIFY_WRITE, mem, len))
- return __clear_user(mem, len);
- return len;
-}
-
-/**
- * flush_user: - Flush a block of memory in user space from cache.
- * @mem: Destination address, in user space.
- * @len: Number of bytes to flush.
- *
- * Returns number of bytes that could not be flushed.
- * On success, this will be zero.
- */
-extern unsigned long flush_user_asm(void __user *mem, unsigned long len);
-static inline unsigned long __must_check __flush_user(
- void __user *mem, unsigned long len)
-{
- int retval;
-
- might_fault();
- retval = flush_user_asm(mem, len);
- mb_incoherent();
- return retval;
-}
-
-static inline unsigned long __must_check flush_user(
- void __user *mem, unsigned long len)
-{
- if (access_ok(VERIFY_WRITE, mem, len))
- return __flush_user(mem, len);
- return len;
-}
-
-/**
- * finv_user: - Flush-inval a block of memory in user space from cache.
- * @mem: Destination address, in user space.
- * @len: Number of bytes to invalidate.
- *
- * Returns number of bytes that could not be flush-invalidated.
- * On success, this will be zero.
- */
-extern unsigned long finv_user_asm(void __user *mem, unsigned long len);
-static inline unsigned long __must_check __finv_user(
- void __user *mem, unsigned long len)
-{
- int retval;
-
- might_fault();
- retval = finv_user_asm(mem, len);
- mb_incoherent();
- return retval;
-}
-static inline unsigned long __must_check finv_user(
- void __user *mem, unsigned long len)
-{
- if (access_ok(VERIFY_WRITE, mem, len))
- return __finv_user(mem, len);
- return len;
-}
-
-#endif /* _ASM_TILE_UACCESS_H */