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author | Aurelien Jacquiot <a-jacquiot@ti.com> | 2011-10-04 12:21:06 -0400 |
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committer | Mark Salter <msalter@redhat.com> | 2011-10-06 19:47:58 -0400 |
commit | 8a0c9e0348479f1b85c640da4795bdd775970bf3 (patch) | |
tree | 1d0f9b2d279b40d42ebd79fa1e99becaaa9f225e /arch/c6x/kernel/sys_c6x.c | |
parent | ec500af3059b474df35418c41c684c1cde830c81 (diff) | |
download | op-kernel-dev-8a0c9e0348479f1b85c640da4795bdd775970bf3.zip op-kernel-dev-8a0c9e0348479f1b85c640da4795bdd775970bf3.tar.gz |
C6X: syscalls
Original port to early 2.6 kernel using TI COFF toolchain.
Brought up to date by Mark Salter <msalter@redhat.com>
Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
[msalter@redhat.com: add include of linux/module.h to sys_c6x.c]
Signed-off-by: Mark Salter <msalter@redhat.com>
Diffstat (limited to 'arch/c6x/kernel/sys_c6x.c')
-rw-r--r-- | arch/c6x/kernel/sys_c6x.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/c6x/kernel/sys_c6x.c b/arch/c6x/kernel/sys_c6x.c new file mode 100644 index 0000000..3e9bdfb --- /dev/null +++ b/arch/c6x/kernel/sys_c6x.c @@ -0,0 +1,74 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/syscalls.h> +#include <linux/uaccess.h> + +#include <asm/syscalls.h> + +#ifdef CONFIG_ACCESS_CHECK +int _access_ok(unsigned long addr, unsigned long size) +{ + if (!size) + return 1; + + if (!addr || addr > (0xffffffffUL - (size - 1))) + goto _bad_access; + + if (segment_eq(get_fs(), KERNEL_DS)) + return 1; + + if (memory_start <= addr && (addr + size - 1) < memory_end) + return 1; + +_bad_access: + pr_debug("Bad access attempt: pid[%d] addr[%08lx] size[0x%lx]\n", + current->pid, addr, size); + return 0; +} +EXPORT_SYMBOL(_access_ok); +#endif + +/* sys_cache_sync -- sync caches over given range */ +asmlinkage int sys_cache_sync(unsigned long s, unsigned long e) +{ + L1D_cache_block_writeback_invalidate(s, e); + L1P_cache_block_invalidate(s, e); + + return 0; +} + +/* Provide the actual syscall number to call mapping. */ +#undef __SYSCALL +#define __SYSCALL(nr, call) [nr] = (call), + +/* + * Use trampolines + */ +#define sys_pread64 sys_pread_c6x +#define sys_pwrite64 sys_pwrite_c6x +#define sys_truncate64 sys_truncate64_c6x +#define sys_ftruncate64 sys_ftruncate64_c6x +#define sys_fadvise64 sys_fadvise64_c6x +#define sys_fadvise64_64 sys_fadvise64_64_c6x +#define sys_fallocate sys_fallocate_c6x + +/* Use sys_mmap_pgoff directly */ +#define sys_mmap2 sys_mmap_pgoff + +/* + * Note that we can't include <linux/unistd.h> here since the header + * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. + */ +void *sys_call_table[__NR_syscalls] = { + [0 ... __NR_syscalls-1] = sys_ni_syscall, +#include <asm/unistd.h> +}; |