1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2005-2017 Andes Technology Corporation
3
4 #include <linux/syscalls.h>
5 #include <linux/uaccess.h>
6
7 #include <asm/cachectl.h>
8 #include <asm/proc-fns.h>
9 #include <asm/fpu.h>
10 #include <asm/fp_udfiex_crtl.h>
11
SYSCALL_DEFINE6(mmap2,unsigned long,addr,unsigned long,len,unsigned long,prot,unsigned long,flags,unsigned long,fd,unsigned long,pgoff)12 SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
13 unsigned long, prot, unsigned long, flags,
14 unsigned long, fd, unsigned long, pgoff)
15 {
16 if (pgoff & (~PAGE_MASK >> 12))
17 return -EINVAL;
18
19 return sys_mmap_pgoff(addr, len, prot, flags, fd,
20 pgoff >> (PAGE_SHIFT - 12));
21 }
22
SYSCALL_DEFINE4(fadvise64_64_wrapper,int,fd,int,advice,loff_t,offset,loff_t,len)23 SYSCALL_DEFINE4(fadvise64_64_wrapper,int, fd, int, advice, loff_t, offset,
24 loff_t, len)
25 {
26 return sys_fadvise64_64(fd, offset, len, advice);
27 }
28
SYSCALL_DEFINE3(cacheflush,unsigned int,start,unsigned int,end,int,cache)29 SYSCALL_DEFINE3(cacheflush, unsigned int, start, unsigned int, end, int, cache)
30 {
31 struct vm_area_struct *vma;
32 bool flushi = true, wbd = true;
33
34 vma = find_vma(current->mm, start);
35 if (!vma)
36 return -EFAULT;
37 switch (cache) {
38 case ICACHE:
39 wbd = false;
40 break;
41 case DCACHE:
42 flushi = false;
43 break;
44 case BCACHE:
45 break;
46 default:
47 return -EINVAL;
48 }
49 cpu_cache_wbinval_range_check(vma, start, end, flushi, wbd);
50
51 return 0;
52 }
53
SYSCALL_DEFINE2(fp_udfiex_crtl,unsigned int,cmd,unsigned int,act)54 SYSCALL_DEFINE2(fp_udfiex_crtl, unsigned int, cmd, unsigned int, act)
55 {
56 #if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
57 int old_udf_iex;
58
59 if (!used_math()) {
60 load_fpu(&init_fpuregs);
61 current->thread.fpu.UDF_IEX_trap = init_fpuregs.UDF_IEX_trap;
62 set_used_math();
63 }
64
65 old_udf_iex = current->thread.fpu.UDF_IEX_trap;
66 act &= (FPCSR_mskUDFE | FPCSR_mskIEXE);
67
68 switch (cmd) {
69 case DISABLE_UDF_IEX_TRAP:
70 current->thread.fpu.UDF_IEX_trap &= ~act;
71 break;
72 case ENABLE_UDF_IEX_TRAP:
73 current->thread.fpu.UDF_IEX_trap |= act;
74 break;
75 case GET_UDF_IEX_TRAP:
76 break;
77 default:
78 return -EINVAL;
79 }
80 return old_udf_iex;
81 #else
82 return -ENOTSUPP;
83 #endif
84 }
85