2
* linux/arch/m68knommu/kernel/sys_m68k.c
4
* This file contains various random system calls that
5
* have a non-standard calling sequence on the Linux/m68k
9
#include <linux/errno.h>
10
#include <linux/sched.h>
12
#include <linux/smp.h>
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>
20
#include <linux/ipc.h>
23
#include <asm/setup.h>
24
#include <asm/uaccess.h>
25
#include <asm/cachectl.h>
26
#include <asm/traps.h>
27
#include <asm/cacheflush.h>
28
#include <asm/unistd.h>
30
/* sys_cacheflush -- flush (part of) the processor cache. */
32
sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
38
asmlinkage int sys_getpagesize(void)
44
* Do a system call from kernel instead of calling sys_execve so we
45
* end up with proper pt_regs.
47
int kernel_execve(const char *filename,
48
const char *const argv[],
49
const char *const envp[])
51
register long __res asm ("%d0") = __NR_execve;
52
register long __a asm ("%d1") = (long)(filename);
53
register long __b asm ("%d2") = (long)(argv);
54
register long __c asm ("%d3") = (long)(envp);
55
asm volatile ("trap #0" : "+d" (__res)
56
: "d" (__a), "d" (__b), "d" (__c));
60
asmlinkage unsigned long sys_get_thread_area(void)
62
return current_thread_info()->tp_value;
65
asmlinkage int sys_set_thread_area(unsigned long tp)
67
current_thread_info()->tp_value = tp;
71
/* This syscall gets its arguments in A0 (mem), D2 (oldval) and
74
sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5,
75
unsigned long __user * mem)
77
struct mm_struct *mm = current->mm;
78
unsigned long mem_value;
80
down_read(&mm->mmap_sem);
83
if (mem_value == oldval)
86
up_read(&mm->mmap_sem);
90
asmlinkage int sys_atomic_barrier(void)
92
/* no code needed for uniprocs */