diff options
Diffstat (limited to 'arch/nds32/kernel/sys_nds32.c')
-rw-r--r-- | arch/nds32/kernel/sys_nds32.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/nds32/kernel/sys_nds32.c b/arch/nds32/kernel/sys_nds32.c new file mode 100644 index 000000000000..9de93ab4c52b --- /dev/null +++ b/arch/nds32/kernel/sys_nds32.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/syscalls.h> +#include <linux/uaccess.h> + +#include <asm/cachectl.h> +#include <asm/proc-fns.h> + +SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, + unsigned long, fd, unsigned long, pgoff) +{ + if (pgoff & (~PAGE_MASK >> 12)) + return -EINVAL; + + return sys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT - 12)); +} + +SYSCALL_DEFINE4(fadvise64_64_wrapper,int, fd, int, advice, loff_t, offset, + loff_t, len) +{ + return sys_fadvise64_64(fd, offset, len, advice); +} + +SYSCALL_DEFINE3(cacheflush, unsigned int, start, unsigned int, end, int, cache) +{ + struct vm_area_struct *vma; + bool flushi = true, wbd = true; + + vma = find_vma(current->mm, start); + if (!vma) + return -EFAULT; + switch (cache) { + case ICACHE: + wbd = false; + break; + case DCACHE: + flushi = false; + break; + case BCACHE: + break; + default: + return -EINVAL; + } + cpu_cache_wbinval_range_check(vma, start, end, flushi, wbd); + + return 0; +} |