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>
31 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
33 * This is really horribly ugly.
35 asmlinkage int sys_ipc (uint call, int first, int second,
36 int third, void *ptr, long fifth)
40 version = call >> 16; /* hack for backward compatibility */
46 return sys_semop (first, (struct sembuf *)ptr, second);
48 return sys_semget (first, second, third);
53 if (get_user(fourth.__pad, (void **) ptr))
55 return sys_semctl (first, second, third, fourth);
63 return sys_msgsnd (first, (struct msgbuf *) ptr,
68 struct ipc_kludge tmp;
71 if (copy_from_user (&tmp,
72 (struct ipc_kludge *)ptr,
75 return sys_msgrcv (first, tmp.msgp, second,
79 return sys_msgrcv (first,
80 (struct msgbuf *) ptr,
81 second, fifth, third);
84 return sys_msgget ((key_t) first, second);
86 return sys_msgctl (first, second,
87 (struct msqid_ds *) ptr);
97 ret = do_shmat (first, ptr, second, &raddr);
100 return put_user (raddr, (ulong __user *) third);
104 return sys_shmdt (ptr);
106 return sys_shmget (first, second, third);
108 return sys_shmctl (first, second, ptr);
116 /* sys_cacheflush -- flush (part of) the processor cache. */
118 sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
124 asmlinkage int sys_getpagesize(void)
130 * Do a system call from kernel instead of calling sys_execve so we
131 * end up with proper pt_regs.
133 int kernel_execve(const char *filename, char *const argv[], char *const envp[])
135 register long __res asm ("%d0") = __NR_execve;
136 register long __a asm ("%d1") = (long)(filename);
137 register long __b asm ("%d2") = (long)(argv);
138 register long __c asm ("%d3") = (long)(envp);
139 asm volatile ("trap #0" : "+d" (__res)
140 : "d" (__a), "d" (__b), "d" (__c));
144 asmlinkage unsigned long sys_get_thread_area(void)
146 return current_thread_info()->tp_value;
149 asmlinkage int sys_set_thread_area(unsigned long tp)
151 current_thread_info()->tp_value = tp;
155 /* This syscall gets its arguments in A0 (mem), D2 (oldval) and
158 sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5,
159 unsigned long __user * mem)
161 struct mm_struct *mm = current->mm;
162 unsigned long mem_value;
164 down_read(&mm->mmap_sem);
167 if (mem_value == oldval)
170 up_read(&mm->mmap_sem);
174 asmlinkage int sys_atomic_barrier(void)
176 /* no code needed for uniprocs */