1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/sh/kernel/sys_sh.c
5 * This file contains various random system calls that
6 * have a non-standard calling sequence on the Linux/SuperH
9 * Taken from i386 version.
11 #include <linux/errno.h>
12 #include <linux/sched.h>
14 #include <linux/smp.h>
15 #include <linux/sem.h>
16 #include <linux/msg.h>
17 #include <linux/shm.h>
18 #include <linux/stat.h>
19 #include <linux/syscalls.h>
20 #include <linux/mman.h>
21 #include <linux/file.h>
22 #include <linux/utsname.h>
23 #include <linux/module.h>
25 #include <linux/ipc.h>
26 #include <asm/syscalls.h>
27 #include <linux/uaccess.h>
28 #include <asm/unistd.h>
29 #include <asm/cacheflush.h>
30 #include <asm/cachectl.h>
32 asmlinkage
int old_mmap(unsigned long addr
, unsigned long len
,
33 unsigned long prot
, unsigned long flags
,
34 int fd
, unsigned long off
)
38 return ksys_mmap_pgoff(addr
, len
, prot
, flags
, fd
, off
>>PAGE_SHIFT
);
41 asmlinkage
long sys_mmap2(unsigned long addr
, unsigned long len
,
42 unsigned long prot
, unsigned long flags
,
43 unsigned long fd
, unsigned long pgoff
)
46 * The shift for mmap2 is constant, regardless of PAGE_SIZE
49 if (pgoff
& ((1 << (PAGE_SHIFT
- 12)) - 1))
52 pgoff
>>= PAGE_SHIFT
- 12;
54 return ksys_mmap_pgoff(addr
, len
, prot
, flags
, fd
, pgoff
);
57 /* sys_cacheflush -- flush (part of) the processor cache. */
58 asmlinkage
int sys_cacheflush(unsigned long addr
, unsigned long len
, int op
)
60 struct vm_area_struct
*vma
;
62 if ((op
<= 0) || (op
> (CACHEFLUSH_D_PURGE
|CACHEFLUSH_I
)))
66 * Verify that the specified address region actually belongs
69 if (addr
+ len
< addr
)
72 down_read(¤t
->mm
->mmap_sem
);
73 vma
= find_vma (current
->mm
, addr
);
74 if (vma
== NULL
|| addr
< vma
->vm_start
|| addr
+ len
> vma
->vm_end
) {
75 up_read(¤t
->mm
->mmap_sem
);
79 switch (op
& CACHEFLUSH_D_PURGE
) {
80 case CACHEFLUSH_D_INVAL
:
81 __flush_invalidate_region((void *)addr
, len
);
84 __flush_wback_region((void *)addr
, len
);
86 case CACHEFLUSH_D_PURGE
:
87 __flush_purge_region((void *)addr
, len
);
91 if (op
& CACHEFLUSH_I
)
92 flush_icache_range(addr
, addr
+len
);
94 up_read(¤t
->mm
->mmap_sem
);