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
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_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}

 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
10SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
11	       unsigned long, prot, unsigned long, flags,
12	       unsigned long, fd, unsigned long, pgoff)
13{
14	if (pgoff & (~PAGE_MASK >> 12))
15		return -EINVAL;
16
17	return sys_mmap_pgoff(addr, len, prot, flags, fd,
18			      pgoff >> (PAGE_SHIFT - 12));
19}
20
21SYSCALL_DEFINE4(fadvise64_64_wrapper,int, fd, int, advice, loff_t, offset,
22					 loff_t, len)
23{
24	return sys_fadvise64_64(fd, offset, len, advice);
25}
26
27SYSCALL_DEFINE3(cacheflush, unsigned int, start, unsigned int, end, int, cache)
28{
29	struct vm_area_struct *vma;
30	bool flushi = true, wbd = true;
31
32	vma = find_vma(current->mm, start);
33	if (!vma)
34		return -EFAULT;
35	switch (cache) {
36	case ICACHE:
37		wbd = false;
38		break;
39	case DCACHE:
40		flushi = false;
41		break;
42	case BCACHE:
43		break;
44	default:
45		return -EINVAL;
46	}
47	cpu_cache_wbinval_range_check(vma, start, end, flushi, wbd);
48
49	return 0;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
50}