]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/m68knommu/kernel/sys_m68k.c | |
3 | * | |
4 | * This file contains various random system calls that | |
5 | * have a non-standard calling sequence on the Linux/m68k | |
6 | * platform. | |
7 | */ | |
8 | ||
9 | #include <linux/errno.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/smp.h> | |
1da177e4 LT |
13 | #include <linux/sem.h> |
14 | #include <linux/msg.h> | |
15 | #include <linux/shm.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/syscalls.h> | |
18 | #include <linux/mman.h> | |
19 | #include <linux/file.h> | |
cba4fbbf | 20 | #include <linux/ipc.h> |
405d2965 | 21 | #include <linux/fs.h> |
1da177e4 LT |
22 | |
23 | #include <asm/setup.h> | |
24 | #include <asm/uaccess.h> | |
25 | #include <asm/cachectl.h> | |
26 | #include <asm/traps.h> | |
1da177e4 | 27 | #include <asm/cacheflush.h> |
fe74290d | 28 | #include <asm/unistd.h> |
1da177e4 | 29 | |
1da177e4 LT |
30 | /* sys_cacheflush -- flush (part of) the processor cache. */ |
31 | asmlinkage int | |
32 | sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) | |
33 | { | |
34 | flush_cache_all(); | |
35 | return(0); | |
36 | } | |
37 | ||
38 | asmlinkage int sys_getpagesize(void) | |
39 | { | |
40 | return PAGE_SIZE; | |
41 | } | |
42 | ||
fe74290d AB |
43 | /* |
44 | * Do a system call from kernel instead of calling sys_execve so we | |
45 | * end up with proper pt_regs. | |
46 | */ | |
47 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) | |
48 | { | |
49 | register long __res asm ("%d0") = __NR_execve; | |
50 | register long __a asm ("%d1") = (long)(filename); | |
51 | register long __b asm ("%d2") = (long)(argv); | |
52 | register long __c asm ("%d3") = (long)(envp); | |
53 | asm volatile ("trap #0" : "+d" (__res) | |
54 | : "d" (__a), "d" (__b), "d" (__c)); | |
55 | return __res; | |
56 | } | |
a58f7534 MK |
57 | |
58 | asmlinkage unsigned long sys_get_thread_area(void) | |
59 | { | |
60 | return current_thread_info()->tp_value; | |
61 | } | |
62 | ||
63 | asmlinkage int sys_set_thread_area(unsigned long tp) | |
64 | { | |
65 | current_thread_info()->tp_value = tp; | |
66 | return 0; | |
67 | } | |
68 | ||
69 | /* This syscall gets its arguments in A0 (mem), D2 (oldval) and | |
70 | D1 (newval). */ | |
71 | asmlinkage int | |
72 | sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, | |
73 | unsigned long __user * mem) | |
74 | { | |
75 | struct mm_struct *mm = current->mm; | |
76 | unsigned long mem_value; | |
77 | ||
78 | down_read(&mm->mmap_sem); | |
79 | ||
80 | mem_value = *mem; | |
81 | if (mem_value == oldval) | |
82 | *mem = newval; | |
83 | ||
84 | up_read(&mm->mmap_sem); | |
85 | return mem_value; | |
86 | } | |
87 | ||
88 | asmlinkage int sys_atomic_barrier(void) | |
89 | { | |
90 | /* no code needed for uniprocs */ | |
91 | return 0; | |
92 | } |