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Diffstat (limited to 'include/asm-mn10300/uaccess.h')
-rw-r--r--include/asm-mn10300/uaccess.h490
1 files changed, 0 insertions, 490 deletions
diff --git a/include/asm-mn10300/uaccess.h b/include/asm-mn10300/uaccess.h
deleted file mode 100644
index 8a3a4dd5576..00000000000
--- a/include/asm-mn10300/uaccess.h
+++ /dev/null
@@ -1,490 +0,0 @@
-/* MN10300 userspace access functions
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#ifndef _ASM_UACCESS_H
-#define _ASM_UACCESS_H
-
-/*
- * User space memory access functions
- */
-#include <linux/sched.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/errno.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_XDS MAKE_MM_SEG(0xBFFFFFFF)
-#define KERNEL_DS MAKE_MM_SEG(0x9FFFFFFF)
-#define USER_DS MAKE_MM_SEG(TASK_SIZE)
-
-#define get_ds() (KERNEL_DS)
-#define get_fs() (current_thread_info()->addr_limit)
-#define set_fs(x) (current_thread_info()->addr_limit = (x))
-#define __kernel_ds_p() (current_thread_info()->addr_limit.seg == 0x9FFFFFFF)
-
-#define segment_eq(a, b) ((a).seg == (b).seg)
-
-#define __addr_ok(addr) \
- ((unsigned long)(addr) < (current_thread_info()->addr_limit.seg))
-
-/*
- * check that a range of addresses falls within the current address limit
- */
-static inline int ___range_ok(unsigned long addr, unsigned int size)
-{
- int flag = 1, tmp;
-
- asm(" add %3,%1 \n" /* set C-flag if addr + size > 4Gb */
- " bcs 0f \n"
- " cmp %4,%1 \n" /* jump if addr+size>limit (error) */
- " bhi 0f \n"
- " clr %0 \n" /* mark okay */
- "0: \n"
- : "=r"(flag), "=&r"(tmp)
- : "1"(addr), "ir"(size),
- "r"(current_thread_info()->addr_limit.seg), "0"(flag)
- : "cc"
- );
-
- return flag;
-}
-
-#define __range_ok(addr, size) ___range_ok((unsigned long)(addr), (u32)(size))
-
-#define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0)
-#define __access_ok(addr, size) (__range_ok((addr), (size)) == 0)
-
-static inline int verify_area(int type, const void *addr, unsigned long size)
-{
- return access_ok(type, addr, size) ? 0 : -EFAULT;
-}
-
-
-/*
- * 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 int fixup_exception(struct pt_regs *regs);
-
-#define put_user(x, ptr) __put_user_check((x), (ptr), sizeof(*(ptr)))
-#define get_user(x, ptr) __get_user_check((x), (ptr), sizeof(*(ptr)))
-
-/*
- * The "__xxx" versions do not do address space checking, useful when
- * doing multiple accesses to the same area (the user has to do the
- * checks by hand with "access_ok()")
- */
-#define __put_user(x, ptr) __put_user_nocheck((x), (ptr), sizeof(*(ptr)))
-#define __get_user(x, ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
-
-/*
- * The "xxx_ret" versions return constant specified in third argument, if
- * something bad happens. These macros can be optimized for the
- * case of just returning from the function xxx_ret is used.
- */
-
-#define put_user_ret(x, ptr, ret) \
- ({ if (put_user((x), (ptr))) return (ret); })
-#define get_user_ret(x, ptr, ret) \
- ({ if (get_user((x), (ptr))) return (ret); })
-#define __put_user_ret(x, ptr, ret) \
- ({ if (__put_user((x), (ptr))) return (ret); })
-#define __get_user_ret(x, ptr, ret) \
- ({ if (__get_user((x), (ptr))) return (ret); })
-
-struct __large_struct { unsigned long buf[100]; };
-#define __m(x) (*(struct __large_struct *)(x))
-
-#define __get_user_nocheck(x, ptr, size) \
-({ \
- __typeof(*(ptr)) __gu_val; \
- unsigned long __gu_addr; \
- int __gu_err; \
- __gu_addr = (unsigned long) (ptr); \
- switch (size) { \
- case 1: __get_user_asm("bu"); break; \
- case 2: __get_user_asm("hu"); break; \
- case 4: __get_user_asm("" ); break; \
- default: __get_user_unknown(); break; \
- } \
- x = (__typeof__(*(ptr))) __gu_val; \
- __gu_err; \
-})
-
-#define __get_user_check(x, ptr, size) \
-({ \
- __typeof__(*(ptr)) __gu_val; \
- unsigned long __gu_addr; \
- int __gu_err; \
- __gu_addr = (unsigned long) (ptr); \
- if (likely(__access_ok(__gu_addr,size))) { \
- switch (size) { \
- case 1: __get_user_asm("bu"); break; \
- case 2: __get_user_asm("hu"); break; \
- case 4: __get_user_asm("" ); break; \
- default: __get_user_unknown(); break; \
- } \
- } \
- else { \
- __gu_err = -EFAULT; \
- __gu_val = 0; \
- } \
- x = (__typeof__(*(ptr))) __gu_val; \
- __gu_err; \
-})
-
-#define __get_user_asm(INSN) \
-({ \
- asm volatile( \
- "1:\n" \
- " mov"INSN" %2,%1\n" \
- " mov 0,%0\n" \
- "2:\n" \
- " .section .fixup,\"ax\"\n" \
- "3:\n\t" \
- " mov %3,%0\n" \
- " jmp 2b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 1b, 3b\n" \
- " .previous" \
- : "=&r" (__gu_err), "=&r" (__gu_val) \
- : "m" (__m(__gu_addr)), "i" (-EFAULT)); \
-})
-
-extern int __get_user_unknown(void);
-
-#define __put_user_nocheck(x, ptr, size) \
-({ \
- union { \
- __typeof__(*(ptr)) val; \
- u32 bits[2]; \
- } __pu_val; \
- unsigned long __pu_addr; \
- int __pu_err; \
- __pu_val.val = (x); \
- __pu_addr = (unsigned long) (ptr); \
- switch (size) { \
- case 1: __put_user_asm("bu"); break; \
- case 2: __put_user_asm("hu"); break; \
- case 4: __put_user_asm("" ); break; \
- case 8: __put_user_asm8(); break; \
- default: __pu_err = __put_user_unknown(); break; \
- } \
- __pu_err; \
-})
-
-#define __put_user_check(x, ptr, size) \
-({ \
- union { \
- __typeof__(*(ptr)) val; \
- u32 bits[2]; \
- } __pu_val; \
- unsigned long __pu_addr; \
- int __pu_err; \
- __pu_val.val = (x); \
- __pu_addr = (unsigned long) (ptr); \
- if (likely(__access_ok(__pu_addr, size))) { \
- switch (size) { \
- case 1: __put_user_asm("bu"); break; \
- case 2: __put_user_asm("hu"); break; \
- case 4: __put_user_asm("" ); break; \
- case 8: __put_user_asm8(); break; \
- default: __pu_err = __put_user_unknown(); break; \
- } \
- } \
- else { \
- __pu_err = -EFAULT; \
- } \
- __pu_err; \
-})
-
-#define __put_user_asm(INSN) \
-({ \
- asm volatile( \
- "1:\n" \
- " mov"INSN" %1,%2\n" \
- " mov 0,%0\n" \
- "2:\n" \
- " .section .fixup,\"ax\"\n" \
- "3:\n" \
- " mov %3,%0\n" \
- " jmp 2b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 1b, 3b\n" \
- " .previous" \
- : "=&r" (__pu_err) \
- : "r" (__pu_val.val), "m" (__m(__pu_addr)), \
- "i" (-EFAULT) \
- ); \
-})
-
-#define __put_user_asm8() \
-({ \
- asm volatile( \
- "1: mov %1,%3 \n" \
- "2: mov %2,%4 \n" \
- " mov 0,%0 \n" \
- "3: \n" \
- " .section .fixup,\"ax\" \n" \
- "4: \n" \
- " mov %5,%0 \n" \
- " jmp 3b \n" \
- " .previous \n" \
- " .section __ex_table,\"a\"\n" \
- " .balign 4 \n" \
- " .long 1b, 4b \n" \
- " .long 2b, 4b \n" \
- " .previous \n" \
- : "=&r" (__pu_err) \
- : "r" (__pu_val.bits[0]), "r" (__pu_val.bits[1]), \
- "m" (__m(__pu_addr)), "m" (__m(__pu_addr+4)), \
- "i" (-EFAULT) \
- ); \
-})
-
-extern int __put_user_unknown(void);
-
-
-/*
- * Copy To/From Userspace
- */
-/* Generic arbitrary sized copy. */
-#define __copy_user(to, from, size) \
-do { \
- if (size) { \
- void *__to = to; \
- const void *__from = from; \
- int w; \
- asm volatile( \
- "0: movbu (%0),%3;\n" \
- "1: movbu %3,(%1);\n" \
- " inc %0;\n" \
- " inc %1;\n" \
- " add -1,%2;\n" \
- " bne 0b;\n" \
- "2:\n" \
- " .section .fixup,\"ax\"\n" \
- "3: jmp 2b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,3b\n" \
- " .previous\n" \
- : "=a"(__from), "=a"(__to), "=r"(size), "=&r"(w)\
- : "0"(__from), "1"(__to), "2"(size) \
- : "memory"); \
- } \
-} while (0)
-
-#define __copy_user_zeroing(to, from, size) \
-do { \
- if (size) { \
- void *__to = to; \
- const void *__from = from; \
- int w; \
- asm volatile( \
- "0: movbu (%0),%3;\n" \
- "1: movbu %3,(%1);\n" \
- " inc %0;\n" \
- " inc %1;\n" \
- " add -1,%2;\n" \
- " bne 0b;\n" \
- "2:\n" \
- " .section .fixup,\"ax\"\n" \
- "3:\n" \
- " mov %2,%0\n" \
- " clr %3\n" \
- "4: movbu %3,(%1);\n" \
- " inc %1;\n" \
- " add -1,%2;\n" \
- " bne 4b;\n" \
- " mov %0,%2\n" \
- " jmp 2b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,3b\n" \
- " .previous\n" \
- : "=a"(__from), "=a"(__to), "=r"(size), "=&r"(w)\
- : "0"(__from), "1"(__to), "2"(size) \
- : "memory"); \
- } \
-} while (0)
-
-/* We let the __ versions of copy_from/to_user inline, because they're often
- * used in fast paths and have only a small space overhead.
- */
-static inline
-unsigned long __generic_copy_from_user_nocheck(void *to, const void *from,
- unsigned long n)
-{
- __copy_user_zeroing(to, from, n);
- return n;
-}
-
-static inline
-unsigned long __generic_copy_to_user_nocheck(void *to, const void *from,
- unsigned long n)
-{
- __copy_user(to, from, n);
- return n;
-}
-
-
-#if 0
-#error don't use - these macros don't increment to & from pointers
-/* Optimize just a little bit when we know the size of the move. */
-#define __constant_copy_user(to, from, size) \
-do { \
- asm volatile( \
- " mov %0,a0;\n" \
- "0: movbu (%1),d3;\n" \
- "1: movbu d3,(%2);\n" \
- " add -1,a0;\n" \
- " bne 0b;\n" \
- "2:;" \
- ".section .fixup,\"ax\"\n" \
- "3: jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,3b\n" \
- ".previous" \
- : \
- : "d"(size), "d"(to), "d"(from) \
- : "d3", "a0"); \
-} while (0)
-
-/* Optimize just a little bit when we know the size of the move. */
-#define __constant_copy_user_zeroing(to, from, size) \
-do { \
- asm volatile( \
- " mov %0,a0;\n" \
- "0: movbu (%1),d3;\n" \
- "1: movbu d3,(%2);\n" \
- " add -1,a0;\n" \
- " bne 0b;\n" \
- "2:;" \
- ".section .fixup,\"ax\"\n" \
- "3: jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,3b\n" \
- ".previous" \
- : \
- : "d"(size), "d"(to), "d"(from) \
- : "d3", "a0"); \
-} while (0)
-
-static inline
-unsigned long __constant_copy_to_user(void *to, const void *from,
- unsigned long n)
-{
- if (access_ok(VERIFY_WRITE, to, n))
- __constant_copy_user(to, from, n);
- return n;
-}
-
-static inline
-unsigned long __constant_copy_from_user(void *to, const void *from,
- unsigned long n)
-{
- if (access_ok(VERIFY_READ, from, n))
- __constant_copy_user_zeroing(to, from, n);
- return n;
-}
-
-static inline
-unsigned long __constant_copy_to_user_nocheck(void *to, const void *from,
- unsigned long n)
-{
- __constant_copy_user(to, from, n);
- return n;
-}
-
-static inline
-unsigned long __constant_copy_from_user_nocheck(void *to, const void *from,
- unsigned long n)
-{
- __constant_copy_user_zeroing(to, from, n);
- return n;
-}
-#endif
-
-extern unsigned long __generic_copy_to_user(void __user *, const void *,
- unsigned long);
-extern unsigned long __generic_copy_from_user(void *, const void __user *,
- unsigned long);
-
-#define __copy_to_user_inatomic(to, from, n) \
- __generic_copy_to_user_nocheck((to), (from), (n))
-#define __copy_from_user_inatomic(to, from, n) \
- __generic_copy_from_user_nocheck((to), (from), (n))
-
-#define __copy_to_user(to, from, n) \
-({ \
- might_sleep(); \
- __copy_to_user_inatomic((to), (from), (n)); \
-})
-
-#define __copy_from_user(to, from, n) \
-({ \
- might_sleep(); \
- __copy_from_user_inatomic((to), (from), (n)); \
-})
-
-
-#define copy_to_user(to, from, n) __generic_copy_to_user((to), (from), (n))
-#define copy_from_user(to, from, n) __generic_copy_from_user((to), (from), (n))
-
-extern long strncpy_from_user(char *dst, const char __user *src, long count);
-extern long __strncpy_from_user(char *dst, const char __user *src, long count);
-extern long strnlen_user(const char __user *str, long n);
-#define strlen_user(str) strnlen_user(str, ~0UL >> 1)
-extern unsigned long clear_user(void __user *mem, unsigned long len);
-extern unsigned long __clear_user(void __user *mem, unsigned long len);
-
-#endif /* _ASM_UACCESS_H */