1 /*
2 * Port on Texas Instruments TMS320C6x architecture
3 *
4 * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
5 * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11 #include <linux/module.h>
12 #include <linux/syscalls.h>
13 #include <linux/uaccess.h>
14
15 #include <asm/syscalls.h>
16
17 #ifdef CONFIG_ACCESS_CHECK
_access_ok(unsigned long addr,unsigned long size)18 int _access_ok(unsigned long addr, unsigned long size)
19 {
20 if (!size)
21 return 1;
22
23 if (!addr || addr > (0xffffffffUL - (size - 1)))
24 goto _bad_access;
25
26 if (segment_eq(get_fs(), KERNEL_DS))
27 return 1;
28
29 if (memory_start <= addr && (addr + size - 1) < memory_end)
30 return 1;
31
32 _bad_access:
33 pr_debug("Bad access attempt: pid[%d] addr[%08lx] size[0x%lx]\n",
34 current->pid, addr, size);
35 return 0;
36 }
37 EXPORT_SYMBOL(_access_ok);
38 #endif
39
40 /* sys_cache_sync -- sync caches over given range */
sys_cache_sync(unsigned long s,unsigned long e)41 asmlinkage int sys_cache_sync(unsigned long s, unsigned long e)
42 {
43 L1D_cache_block_writeback_invalidate(s, e);
44 L1P_cache_block_invalidate(s, e);
45
46 return 0;
47 }
48
49 /* Provide the actual syscall number to call mapping. */
50 #undef __SYSCALL
51 #define __SYSCALL(nr, call) [nr] = (call),
52
53 /*
54 * Use trampolines
55 */
56 #define sys_pread64 sys_pread_c6x
57 #define sys_pwrite64 sys_pwrite_c6x
58 #define sys_truncate64 sys_truncate64_c6x
59 #define sys_ftruncate64 sys_ftruncate64_c6x
60 #define sys_fadvise64 sys_fadvise64_c6x
61 #define sys_fadvise64_64 sys_fadvise64_64_c6x
62 #define sys_fallocate sys_fallocate_c6x
63
64 /* Use sys_mmap_pgoff directly */
65 #define sys_mmap2 sys_mmap_pgoff
66
67 /*
68 * Note that we can't include <linux/unistd.h> here since the header
69 * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
70 */
71 void *sys_call_table[__NR_syscalls] = {
72 [0 ... __NR_syscalls-1] = sys_ni_syscall,
73 #include <asm/unistd.h>
74 };
75