1
2
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/udftrap.h>
10#include <asm/fpu.h>
11
12SYSCALL_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
23SYSCALL_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
29SYSCALL_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
54SYSCALL_DEFINE1(udftrap, int, option)
55{
56#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
57 int old_udftrap;
58
59 if (!used_math()) {
60 load_fpu(&init_fpuregs);
61 current->thread.fpu.UDF_trap = init_fpuregs.UDF_trap;
62 set_used_math();
63 }
64
65 old_udftrap = current->thread.fpu.UDF_trap;
66 switch (option) {
67 case DISABLE_UDFTRAP:
68 current->thread.fpu.UDF_trap = 0;
69 break;
70 case ENABLE_UDFTRAP:
71 current->thread.fpu.UDF_trap = FPCSR_mskUDFE;
72 break;
73 case GET_UDFTRAP:
74 break;
75 default:
76 return -EINVAL;
77 }
78 return old_udftrap;
79#else
80 return -ENOTSUPP;
81#endif
82}
83