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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
8a0c9e03 AJ |
2 | /* |
3 | * Port on Texas Instruments TMS320C6x architecture | |
4 | * | |
5 | * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated | |
6 | * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) | |
8a0c9e03 AJ |
7 | */ |
8 | #include <linux/module.h> | |
9 | #include <linux/syscalls.h> | |
10 | #include <linux/uaccess.h> | |
11 | ||
12 | #include <asm/syscalls.h> | |
13 | ||
14 | #ifdef CONFIG_ACCESS_CHECK | |
15 | int _access_ok(unsigned long addr, unsigned long size) | |
16 | { | |
17 | if (!size) | |
18 | return 1; | |
19 | ||
20 | if (!addr || addr > (0xffffffffUL - (size - 1))) | |
21 | goto _bad_access; | |
22 | ||
db68ce10 | 23 | if (uaccess_kernel()) |
8a0c9e03 AJ |
24 | return 1; |
25 | ||
26 | if (memory_start <= addr && (addr + size - 1) < memory_end) | |
27 | return 1; | |
28 | ||
29 | _bad_access: | |
30 | pr_debug("Bad access attempt: pid[%d] addr[%08lx] size[0x%lx]\n", | |
31 | current->pid, addr, size); | |
32 | return 0; | |
33 | } | |
34 | EXPORT_SYMBOL(_access_ok); | |
35 | #endif | |
36 | ||
37 | /* sys_cache_sync -- sync caches over given range */ | |
38 | asmlinkage int sys_cache_sync(unsigned long s, unsigned long e) | |
39 | { | |
40 | L1D_cache_block_writeback_invalidate(s, e); | |
41 | L1P_cache_block_invalidate(s, e); | |
42 | ||
43 | return 0; | |
44 | } | |
45 | ||
46 | /* Provide the actual syscall number to call mapping. */ | |
47 | #undef __SYSCALL | |
48 | #define __SYSCALL(nr, call) [nr] = (call), | |
49 | ||
50 | /* | |
51 | * Use trampolines | |
52 | */ | |
53 | #define sys_pread64 sys_pread_c6x | |
54 | #define sys_pwrite64 sys_pwrite_c6x | |
55 | #define sys_truncate64 sys_truncate64_c6x | |
56 | #define sys_ftruncate64 sys_ftruncate64_c6x | |
57 | #define sys_fadvise64 sys_fadvise64_c6x | |
58 | #define sys_fadvise64_64 sys_fadvise64_64_c6x | |
59 | #define sys_fallocate sys_fallocate_c6x | |
60 | ||
61 | /* Use sys_mmap_pgoff directly */ | |
62 | #define sys_mmap2 sys_mmap_pgoff | |
63 | ||
64 | /* | |
65 | * Note that we can't include <linux/unistd.h> here since the header | |
66 | * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. | |
67 | */ | |
68 | void *sys_call_table[__NR_syscalls] = { | |
69 | [0 ... __NR_syscalls-1] = sys_ni_syscall, | |
70 | #include <asm/unistd.h> | |
71 | }; |