uaccess.h (05909cd9a0c8811731b38697af13075e8954314f) uaccess.h (05cdf457477d6603b207d91873f0a3d4c7f8c1cd)
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
4 * Copyright (C) 2008-2009 PetaLogix
5 * Copyright (C) 2006 Atmark Techno, Inc.
6 */
7
8#ifndef _ASM_MICROBLAZE_UACCESS_H

--- 16 unchanged lines hidden (view full) ---

25 * get_fs() == KERNEL_DS, checking is bypassed.
26 *
27 * For historical reasons, these macros are grossly misnamed.
28 *
29 * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
30 */
31# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
32
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
4 * Copyright (C) 2008-2009 PetaLogix
5 * Copyright (C) 2006 Atmark Techno, Inc.
6 */
7
8#ifndef _ASM_MICROBLAZE_UACCESS_H

--- 16 unchanged lines hidden (view full) ---

25 * get_fs() == KERNEL_DS, checking is bypassed.
26 *
27 * For historical reasons, these macros are grossly misnamed.
28 *
29 * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
30 */
31# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
32
33# ifndef CONFIG_MMU
34# define KERNEL_DS MAKE_MM_SEG(0)
35# define USER_DS KERNEL_DS
36# else
37# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
38# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
33# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
34# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
39# endif
40
41# define get_fs() (current_thread_info()->addr_limit)
42# define set_fs(val) (current_thread_info()->addr_limit = (val))
43
44# define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
45
35
36# define get_fs() (current_thread_info()->addr_limit)
37# define set_fs(val) (current_thread_info()->addr_limit = (val))
38
39# define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
40
46#ifndef CONFIG_MMU
47
48/* Check against bounds of physical memory */
49static inline int ___range_ok(unsigned long addr, unsigned long size)
50{
51 return ((addr < memory_start) ||
52 ((addr + size - 1) > (memory_start + memory_size - 1)));
53}
54
55#define __range_ok(addr, size) \
56 ___range_ok((unsigned long)(addr), (unsigned long)(size))
57
58#define access_ok(addr, size) (__range_ok((addr), (size)) == 0)
59
60#else
61
62static inline int access_ok(const void __user *addr, unsigned long size)
63{
64 if (!size)
65 goto ok;
66
67 if ((get_fs().seg < ((unsigned long)addr)) ||
68 (get_fs().seg < ((unsigned long)addr + size - 1))) {
69 pr_devel("ACCESS fail at 0x%08x (size 0x%x), seg 0x%08x\n",
70 (__force u32)addr, (u32)size,
71 (u32)get_fs().seg);
72 return 0;
73 }
74ok:
75 pr_devel("ACCESS OK at 0x%08x (size 0x%x), seg 0x%08x\n",
76 (__force u32)addr, (u32)size,
77 (u32)get_fs().seg);
78 return 1;
79}
41static inline int access_ok(const void __user *addr, unsigned long size)
42{
43 if (!size)
44 goto ok;
45
46 if ((get_fs().seg < ((unsigned long)addr)) ||
47 (get_fs().seg < ((unsigned long)addr + size - 1))) {
48 pr_devel("ACCESS fail at 0x%08x (size 0x%x), seg 0x%08x\n",
49 (__force u32)addr, (u32)size,
50 (u32)get_fs().seg);
51 return 0;
52 }
53ok:
54 pr_devel("ACCESS OK at 0x%08x (size 0x%x), seg 0x%08x\n",
55 (__force u32)addr, (u32)size,
56 (u32)get_fs().seg);
57 return 1;
58}
80#endif
81
59
82#ifdef CONFIG_MMU
83# define __FIXUP_SECTION ".section .fixup,\"ax\"\n"
84# define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n"
60# define __FIXUP_SECTION ".section .fixup,\"ax\"\n"
61# define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n"
85#else
86# define __FIXUP_SECTION ".section .discard,\"ax\"\n"
87# define __EX_TABLE_SECTION ".section .discard,\"ax\"\n"
88#endif
89
90extern unsigned long __copy_tofrom_user(void __user *to,
91 const void __user *from, unsigned long size);
92
93/* Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. */
94static inline unsigned long __must_check __clear_user(void __user *to,
95 unsigned long n)
96{

--- 254 unchanged lines hidden --- 		62
63extern unsigned long __copy_tofrom_user(void __user *to,
64 const void __user *from, unsigned long size);
65
66/* Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. */
67static inline unsigned long __must_check __clear_user(void __user *to,
68 unsigned long n)
69{

--- 254 unchanged lines hidden ---