powerpc: merge uaccess.h

There is still a bug to be fixed and more merging to be done.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

1 files changed, 0 insertions, 341 deletions

diff --git a/include/asm-ppc64/uaccess.h b/include/asm-ppc64/uaccess.h
deleted file mode 100644
index 132c1276547..00000000000
--- a/include/asm-ppc64/uaccess.h
+++ /dev/null
@@ -1,341 +0,0 @@
-#ifndef _PPC64_UACCESS_H
-#define _PPC64_UACCESS_H
-
-/* 
- * 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; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef __ASSEMBLY__
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <asm/processor.h>
-
-#define VERIFY_READ	0
-#define VERIFY_WRITE	1
-
-/*
- * 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(s)  ((mm_segment_t) { (s) })
-
-#define KERNEL_DS	MAKE_MM_SEG(0UL)
-#define USER_DS		MAKE_MM_SEG(0xf000000000000000UL)
-
-#define get_ds()	(KERNEL_DS)
-#define get_fs()	(current->thread.fs)
-#define set_fs(val)	(current->thread.fs = (val))
-
-#define segment_eq(a,b)	((a).seg == (b).seg)
-
-/*
- * Use the alpha trick for checking ranges:
- *
- * Is a address valid? This does a straightforward calculation rather
- * than tests.
- *
- * Address valid if:
- *  - "addr" doesn't have any high-bits set
- *  - AND "size" doesn't have any high-bits set
- *  - OR we are in kernel mode.
- *
- * We dont have to check for high bits in (addr+size) because the first
- * two checks force the maximum result to be below the start of the
- * kernel region.
- */
-#define __access_ok(addr,size,segment) \
-	(((segment).seg & (addr | size )) == 0)
-
-#define access_ok(type,addr,size) \
-	__access_ok(((__force unsigned long)(addr)),(size),get_fs())
-
-/*
- * The exception table consists of pairs of addresses: the first is the
- * address of an instruction that is allowed to fault, and the second is
- * the address at which the program should continue.  No registers are
- * modified, so it is entirely up to the continuation code to figure out
- * what to do.
- *
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path.  This means when everything is well,
- * we don't even have to jump over them.  Further, they do not intrude
- * on our cache or tlb entries.
- */
-
-struct exception_table_entry
-{
-	unsigned long insn, fixup;
-};
-
-/* Returns 0 if exception not found and fixup otherwise.  */
-extern unsigned long search_exception_table(unsigned long);
-
-/*
- * These are the main single-value transfer routines.  They automatically
- * use the right size if we just have the right pointer type.
- *
- * This gets kind of ugly. We want to return _two_ values in "get_user()"
- * and yet we don't want to do any pointers, because that is too much
- * of a performance impact. Thus we have a few rather ugly macros here,
- * and hide all the ugliness from the user.
- *
- * The "__xxx" versions of the user access functions are versions that
- * do not verify the address space, that must have been done previously
- * with a separate "access_ok()" call (this is used when we do multiple
- * accesses to the same area of user memory).
- *
- * As we use the same address space for kernel and user data on the
- * PowerPC, we can just do these as direct assignments.  (Of course, the
- * exception handling means that it's no longer "just"...)
- */
-#define get_user(x,ptr) \
-  __get_user_check((x),(ptr),sizeof(*(ptr)))
-#define put_user(x,ptr) \
-  __put_user_check((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
-
-#define __get_user(x,ptr) \
-  __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
-#define __put_user(x,ptr) \
-  __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
-
-#define __get_user_unaligned __get_user
-#define __put_user_unaligned __put_user
-
-extern long __put_user_bad(void);
-
-#define __put_user_nocheck(x,ptr,size)				\
-({								\
-	long __pu_err;						\
-	might_sleep();						\
-	__chk_user_ptr(ptr);					\
-	__put_user_size((x),(ptr),(size),__pu_err,-EFAULT);	\
-	__pu_err;						\
-})
-
-#define __put_user_check(x,ptr,size)					\
-({									\
-	long __pu_err = -EFAULT;					\
-	void __user *__pu_addr = (ptr);					\
-	might_sleep();							\
-	if (access_ok(VERIFY_WRITE,__pu_addr,size))			\
-		__put_user_size((x),__pu_addr,(size),__pu_err,-EFAULT);	\
-	__pu_err;							\
-})
-
-#define __put_user_size(x,ptr,size,retval,errret)			\
-do {									\
-	retval = 0;							\
-	switch (size) {							\
-	  case 1: __put_user_asm(x,ptr,retval,"stb",errret); break;	\
-	  case 2: __put_user_asm(x,ptr,retval,"sth",errret); break;	\
-	  case 4: __put_user_asm(x,ptr,retval,"stw",errret); break;	\
-	  case 8: __put_user_asm(x,ptr,retval,"std",errret); break; 	\
-	  default: __put_user_bad();					\
-	}								\
-} while (0)
-
-/*
- * We don't tell gcc that we are accessing memory, but this is OK
- * because we do not write to any memory gcc knows about, so there
- * are no aliasing issues.
- */
-#define __put_user_asm(x, addr, err, op, errret)		\
-	__asm__ __volatile__(					\
-		"1:	"op" %1,0(%2)  	# put_user\n" 	 	\
-		"2:\n"						\
-		".section .fixup,\"ax\"\n"			\
-		"3:	li %0,%3\n"				\
-		"	b 2b\n"					\
-		".previous\n"					\
-		".section __ex_table,\"a\"\n"			\
-		"	.align 3\n"				\
-		"	.llong 1b,3b\n"				\
-		".previous"					\
-		: "=r"(err)					\
-		: "r"(x), "b"(addr), "i"(errret), "0"(err))
-
-
-#define __get_user_nocheck(x,ptr,size)				\
-({								\
-	long __gu_err;						\
-	unsigned long __gu_val;					\
-	might_sleep();						\
-	__get_user_size(__gu_val,(ptr),(size),__gu_err,-EFAULT);\
-	(x) = (__typeof__(*(ptr)))__gu_val;			\
-	__gu_err;						\
-})
-
-#define __get_user_check(x,ptr,size)					\
-({									\
-	long __gu_err = -EFAULT;					\
-	unsigned long __gu_val = 0;					\
-	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
-	might_sleep();							\
-	if (access_ok(VERIFY_READ,__gu_addr,size))			\
-		__get_user_size(__gu_val,__gu_addr,(size),__gu_err,-EFAULT);\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
-	__gu_err;							\
-})
-
-extern long __get_user_bad(void);
-
-#define __get_user_size(x,ptr,size,retval,errret)			\
-do {									\
-	retval = 0;							\
-	__chk_user_ptr(ptr);						\
-	switch (size) {							\
-	  case 1: __get_user_asm(x,ptr,retval,"lbz",errret); break;	\
-	  case 2: __get_user_asm(x,ptr,retval,"lhz",errret); break;	\
-	  case 4: __get_user_asm(x,ptr,retval,"lwz",errret); break;	\
-	  case 8: __get_user_asm(x,ptr,retval,"ld",errret);  break;	\
-	  default: (x) = __get_user_bad();				\
-	}								\
-} while (0)
-
-#define __get_user_asm(x, addr, err, op, errret)	\
-	__asm__ __volatile__(				\
-		"1:	"op" %1,0(%2)	# get_user\n"  	\
-		"2:\n"					\
-		".section .fixup,\"ax\"\n"		\
-		"3:	li %0,%3\n"			\
-		"	li %1,0\n"			\
-		"	b 2b\n"				\
-		".previous\n"				\
-		".section __ex_table,\"a\"\n"		\
-		"	.align 3\n"			\
-		"	.llong 1b,3b\n"			\
-		".previous"				\
-		: "=r"(err), "=r"(x)			\
-		: "b"(addr), "i"(errret), "0"(err))
-
-/* more complex routines */
-
-extern unsigned long __copy_tofrom_user(void __user *to, const void __user *from,
-					unsigned long size);
-
-static inline unsigned long
-__copy_from_user_inatomic(void *to, const void __user *from, unsigned long n)
-{
-	if (__builtin_constant_p(n)) {
-		unsigned long ret;
-
-		switch (n) {
-		case 1:
-			__get_user_size(*(u8 *)to, from, 1, ret, 1);
-			return ret;
-		case 2:
-			__get_user_size(*(u16 *)to, from, 2, ret, 2);
-			return ret;
-		case 4:
-			__get_user_size(*(u32 *)to, from, 4, ret, 4);
-			return ret;
-		case 8:
-			__get_user_size(*(u64 *)to, from, 8, ret, 8);
-			return ret;
-		}
-	}
-	return __copy_tofrom_user((__force void __user *) to, from, n);
-}
-
-static inline unsigned long
-__copy_from_user(void *to, const void __user *from, unsigned long n)
-{
-	might_sleep();
-	return __copy_from_user_inatomic(to, from, n);
-}
-
-static inline unsigned long
-__copy_to_user_inatomic(void __user *to, const void *from, unsigned long n)
-{
-	if (__builtin_constant_p(n)) {
-		unsigned long ret;
-
-		switch (n) {
-		case 1:
-			__put_user_size(*(u8 *)from, (u8 __user *)to, 1, ret, 1);
-			return ret;
-		case 2:
-			__put_user_size(*(u16 *)from, (u16 __user *)to, 2, ret, 2);
-			return ret;
-		case 4:
-			__put_user_size(*(u32 *)from, (u32 __user *)to, 4, ret, 4);
-			return ret;
-		case 8:
-			__put_user_size(*(u64 *)from, (u64 __user *)to, 8, ret, 8);
-			return ret;
-		}
-	}
-	return __copy_tofrom_user(to, (__force const void __user *) from, n);
-}
-
-static inline unsigned long
-__copy_to_user(void __user *to, const void *from, unsigned long n)
-{
-	might_sleep();
-	return __copy_to_user_inatomic(to, from, n);
-}
-
-#define __copy_in_user(to, from, size) \
-	__copy_tofrom_user((to), (from), (size))
-
-extern unsigned long copy_from_user(void *to, const void __user *from,
-				    unsigned long n);
-extern unsigned long copy_to_user(void __user *to, const void *from,
-				  unsigned long n);
-extern unsigned long copy_in_user(void __user *to, const void __user *from,
-				  unsigned long n);
-
-extern unsigned long __clear_user(void __user *addr, unsigned long size);
-
-static inline unsigned long
-clear_user(void __user *addr, unsigned long size)
-{
-	might_sleep();
-	if (likely(access_ok(VERIFY_WRITE, addr, size)))
-		size = __clear_user(addr, size);
-	return size;
-}
-
-extern int __strncpy_from_user(char *dst, const char __user *src, long count);
-
-static inline long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
-	might_sleep();
-	if (likely(access_ok(VERIFY_READ, src, 1)))
-		return __strncpy_from_user(dst, src, count);
-	return -EFAULT;
-}
-
-/*
- * Return the size of a string (including the ending 0)
- *
- * Return 0 for error
- */
-extern int __strnlen_user(const char __user *str, long len);
-
-/*
- * Returns the length of the string at str (including the null byte),
- * or 0 if we hit a page we can't access,
- * or something > len if we didn't find a null byte.
- */
-static inline int strnlen_user(const char __user *str, long len)
-{
-	might_sleep();
-	if (likely(access_ok(VERIFY_READ, str, 1)))
-		return __strnlen_user(str, len);
-	return 0;
-}
-
-#define strlen_user(str)	strnlen_user((str), 0x7ffffffe)
-
-#endif  /* __ASSEMBLY__ */
-
-#endif	/* _PPC64_UACCESS_H */