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// 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>
#include <asm/udftrap.h>
#include <asm/fpu.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;
}
SYSCALL_DEFINE1(udftrap, int, option)
{
#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
int old_udftrap;
if (!used_math()) {
load_fpu(&init_fpuregs);
current->thread.fpu.UDF_trap = init_fpuregs.UDF_trap;
set_used_math();
}
old_udftrap = current->thread.fpu.UDF_trap;
switch (option) {
case DISABLE_UDFTRAP:
current->thread.fpu.UDF_trap = 0;
break;
case ENABLE_UDFTRAP:
current->thread.fpu.UDF_trap = FPCSR_mskUDFE;
break;
case GET_UDFTRAP:
break;
default:
return -EINVAL;
}
return old_udftrap;
#else
return -ENOTSUPP;
#endif
}
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