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author | Guo Ren <ren_guo@c-sky.com> | 2018-09-05 14:25:08 +0800 |
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committer | Guo Ren <ren_guo@c-sky.com> | 2018-10-25 23:36:19 +0800 |
commit | 4859bfca11c7d63d55175bcd85a75d6cee4b7184 (patch) | |
tree | cb768c4368da4efdb051241cfbc7b11fa1a8fc6e /arch/csky/kernel/syscall.c | |
parent | 081860b970adb69888734df0c8aa849b00ea7254 (diff) | |
download | linux-4859bfca11c7d63d55175bcd85a75d6cee4b7184.tar.gz linux-4859bfca11c7d63d55175bcd85a75d6cee4b7184.tar.bz2 linux-4859bfca11c7d63d55175bcd85a75d6cee4b7184.zip |
csky: System Call
This patch adds files related to syscall.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/csky/kernel/syscall.c')
-rw-r--r-- | arch/csky/kernel/syscall.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/csky/kernel/syscall.c b/arch/csky/kernel/syscall.c new file mode 100644 index 000000000000..3d30e58a45d2 --- /dev/null +++ b/arch/csky/kernel/syscall.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#include <linux/syscalls.h> + +SYSCALL_DEFINE1(set_thread_area, unsigned long, addr) +{ + struct thread_info *ti = task_thread_info(current); + struct pt_regs *reg = current_pt_regs(); + + reg->tls = addr; + ti->tp_value = addr; + + return 0; +} + +SYSCALL_DEFINE6(mmap2, + unsigned long, addr, + unsigned long, len, + unsigned long, prot, + unsigned long, flags, + unsigned long, fd, + off_t, offset) +{ + if (unlikely(offset & (~PAGE_MASK >> 12))) + return -EINVAL; + + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + offset >> (PAGE_SHIFT - 12)); +} + +/* + * for abiv1 the 64bits args should be even th, So we need mov the advice + * forward. + */ +SYSCALL_DEFINE4(csky_fadvise64_64, + int, fd, + int, advice, + loff_t, offset, + loff_t, len) +{ + return ksys_fadvise64_64(fd, offset, len, advice); +} |