| Aurelien Jacquiot | 8a0c9e0 | 2011-10-04 12:21:06 -0400 | [diff] [blame] | 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 |
| 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 */ |
| 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 | }; |