1 /*
2 * Copyright (C) 2021 HiSilicon (Shanghai) Technologies CO., LIMITED.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 */
18
19 #ifndef __MM_EXT_H__
20 #define __MM_EXT_H__
21
22 #include "hi_osal.h"
23 #include "hi_math.h"
24 #include "hi_common.h"
25 #include "osal_mmz.h"
26
27 #ifdef __cplusplus
28 #if __cplusplus
29 extern "C" {
30 #endif
31 #endif
32
read_user_linear_space_valid(hi_u8 * addr_start,hi_u32 len)33 static inline hi_bool read_user_linear_space_valid(hi_u8 *addr_start, hi_u32 len)
34 {
35 hi_u8 check;
36 hi_u8 *addr_end = HI_NULL;
37
38 if (len == 0) {
39 return HI_FALSE;
40 }
41
42 if (!osal_access_ok(OSAL_VERIFY_READ, addr_start, len)) {
43 return HI_FALSE;
44 }
45
46 addr_end = addr_start + len - 1;
47 if (osal_copy_from_user(&check, addr_end, 1)) {
48 return HI_FALSE;
49 }
50
51 return HI_TRUE;
52 }
53
write_user_linear_space_valid(hi_u8 * addr_start,hi_u32 len)54 static inline hi_bool write_user_linear_space_valid(hi_u8 *addr_start, hi_u32 len)
55 {
56 hi_u8 check = 0;
57 hi_u8 *addr_end = HI_NULL;
58
59 if (len == 0) {
60 return HI_FALSE;
61 }
62
63 if (!osal_access_ok(OSAL_VERIFY_WRITE, addr_start, len)) {
64 return HI_FALSE;
65 }
66
67 addr_end = addr_start + len - 1;
68 if (osal_copy_to_user(addr_end, &check, 1)) {
69 return HI_FALSE;
70 }
71
72 return HI_TRUE;
73 }
74
75 #ifdef __cplusplus
76 #if __cplusplus
77 }
78 #endif
79 #endif
80
81 #endif /* __MM_EXT_H__ */
82