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
_access_ok(unsigned long addr,unsigned long size)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 */
sys_cache_sync(unsigned long s,unsigned long e)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 };
72
