treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
[linux-2.6-microblaze.git] / arch / c6x / kernel / sys_c6x.c
1 // SPDX-License-Identifier: GPL-2.0-only
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)
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
23         if (uaccess_kernel())
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 };