Linux-2.6.12-rc2
[linux-3.10.git] / arch / h8300 / kernel / sys_h8300.c
1 /*
2  * linux/arch/h8300/kernel/sys_h8300.c
3  *
4  * This file contains various random system calls that
5  * have a non-standard calling sequence on the H8/300
6  * platform.
7  */
8
9 #include <linux/errno.h>
10 #include <linux/sched.h>
11 #include <linux/mm.h>
12 #include <linux/smp.h>
13 #include <linux/smp_lock.h>
14 #include <linux/sem.h>
15 #include <linux/msg.h>
16 #include <linux/shm.h>
17 #include <linux/stat.h>
18 #include <linux/syscalls.h>
19 #include <linux/mman.h>
20 #include <linux/file.h>
21 #include <linux/utsname.h>
22
23 #include <asm/setup.h>
24 #include <asm/uaccess.h>
25 #include <asm/cachectl.h>
26 #include <asm/traps.h>
27 #include <asm/ipc.h>
28
29 /*
30  * sys_pipe() is the normal C calling standard for creating
31  * a pipe. It's not the way unix traditionally does this, though.
32  */
33 asmlinkage int sys_pipe(unsigned long * fildes)
34 {
35         int fd[2];
36         int error;
37
38         error = do_pipe(fd);
39         if (!error) {
40                 if (copy_to_user(fildes, fd, 2*sizeof(int)))
41                         error = -EFAULT;
42         }
43         return error;
44 }
45
46 /* common code for old and new mmaps */
47 static inline long do_mmap2(
48         unsigned long addr, unsigned long len,
49         unsigned long prot, unsigned long flags,
50         unsigned long fd, unsigned long pgoff)
51 {
52         int error = -EBADF;
53         struct file * file = NULL;
54
55         flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
56         if (!(flags & MAP_ANONYMOUS)) {
57                 file = fget(fd);
58                 if (!file)
59                         goto out;
60         }
61
62         down_write(&current->mm->mmap_sem);
63         error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
64         up_write(&current->mm->mmap_sem);
65
66         if (file)
67                 fput(file);
68 out:
69         return error;
70 }
71
72 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
73         unsigned long prot, unsigned long flags,
74         unsigned long fd, unsigned long pgoff)
75 {
76         return do_mmap2(addr, len, prot, flags, fd, pgoff);
77 }
78
79 /*
80  * Perform the select(nd, in, out, ex, tv) and mmap() system
81  * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
82  * handle more than 4 system call parameters, so these system calls
83  * used a memory block for parameter passing..
84  */
85
86 struct mmap_arg_struct {
87         unsigned long addr;
88         unsigned long len;
89         unsigned long prot;
90         unsigned long flags;
91         unsigned long fd;
92         unsigned long offset;
93 };
94
95 asmlinkage int old_mmap(struct mmap_arg_struct *arg)
96 {
97         struct mmap_arg_struct a;
98         int error = -EFAULT;
99
100         if (copy_from_user(&a, arg, sizeof(a)))
101                 goto out;
102
103         error = -EINVAL;
104         if (a.offset & ~PAGE_MASK)
105                 goto out;
106
107         a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
108
109         error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
110 out:
111         return error;
112 }
113
114 #if 0 /* DAVIDM - do we want this */
115 struct mmap_arg_struct64 {
116         __u32 addr;
117         __u32 len;
118         __u32 prot;
119         __u32 flags;
120         __u64 offset; /* 64 bits */
121         __u32 fd;
122 };
123
124 asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg)
125 {
126         int error = -EFAULT;
127         struct file * file = NULL;
128         struct mmap_arg_struct64 a;
129         unsigned long pgoff;
130
131         if (copy_from_user(&a, arg, sizeof(a)))
132                 return -EFAULT;
133
134         if ((long)a.offset & ~PAGE_MASK)
135                 return -EINVAL;
136
137         pgoff = a.offset >> PAGE_SHIFT;
138         if ((a.offset >> PAGE_SHIFT) != pgoff)
139                 return -EINVAL;
140
141         if (!(a.flags & MAP_ANONYMOUS)) {
142                 error = -EBADF;
143                 file = fget(a.fd);
144                 if (!file)
145                         goto out;
146         }
147         a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
148
149         down_write(&current->mm->mmap_sem);
150         error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff);
151         up_write(&current->mm->mmap_sem);
152         if (file)
153                 fput(file);
154 out:
155         return error;
156 }
157 #endif
158
159 struct sel_arg_struct {
160         unsigned long n;
161         fd_set *inp, *outp, *exp;
162         struct timeval *tvp;
163 };
164
165 asmlinkage int old_select(struct sel_arg_struct *arg)
166 {
167         struct sel_arg_struct a;
168
169         if (copy_from_user(&a, arg, sizeof(a)))
170                 return -EFAULT;
171         /* sys_select() does the appropriate kernel locking */
172         return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
173 }
174
175 /*
176  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
177  *
178  * This is really horribly ugly.
179  */
180 asmlinkage int sys_ipc (uint call, int first, int second,
181                         int third, void *ptr, long fifth)
182 {
183         int version, ret;
184
185         version = call >> 16; /* hack for backward compatibility */
186         call &= 0xffff;
187
188         if (call <= SEMCTL)
189                 switch (call) {
190                 case SEMOP:
191                         return sys_semop (first, (struct sembuf *)ptr, second);
192                 case SEMGET:
193                         return sys_semget (first, second, third);
194                 case SEMCTL: {
195                         union semun fourth;
196                         if (!ptr)
197                                 return -EINVAL;
198                         if (get_user(fourth.__pad, (void **) ptr))
199                                 return -EFAULT;
200                         return sys_semctl (first, second, third, fourth);
201                         }
202                 default:
203                         return -EINVAL;
204                 }
205         if (call <= MSGCTL) 
206                 switch (call) {
207                 case MSGSND:
208                         return sys_msgsnd (first, (struct msgbuf *) ptr, 
209                                           second, third);
210                 case MSGRCV:
211                         switch (version) {
212                         case 0: {
213                                 struct ipc_kludge tmp;
214                                 if (!ptr)
215                                         return -EINVAL;
216                                 if (copy_from_user (&tmp,
217                                                     (struct ipc_kludge *)ptr,
218                                                     sizeof (tmp)))
219                                         return -EFAULT;
220                                 return sys_msgrcv (first, tmp.msgp, second,
221                                                    tmp.msgtyp, third);
222                                 }
223                         default:
224                                 return sys_msgrcv (first,
225                                                    (struct msgbuf *) ptr,
226                                                    second, fifth, third);
227                         }
228                 case MSGGET:
229                         return sys_msgget ((key_t) first, second);
230                 case MSGCTL:
231                         return sys_msgctl (first, second,
232                                            (struct msqid_ds *) ptr);
233                 default:
234                         return -EINVAL;
235                 }
236         if (call <= SHMCTL) 
237                 switch (call) {
238                 case SHMAT:
239                         switch (version) {
240                         default: {
241                                 ulong raddr;
242                                 ret = do_shmat (first, (char *) ptr,
243                                                  second, &raddr);
244                                 if (ret)
245                                         return ret;
246                                 return put_user (raddr, (ulong *) third);
247                         }
248                         }
249                 case SHMDT: 
250                         return sys_shmdt ((char *)ptr);
251                 case SHMGET:
252                         return sys_shmget (first, second, third);
253                 case SHMCTL:
254                         return sys_shmctl (first, second,
255                                            (struct shmid_ds *) ptr);
256                 default:
257                         return -EINVAL;
258                 }
259
260         return -EINVAL;
261 }
262
263 /* sys_cacheflush -- no support.  */
264 asmlinkage int
265 sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
266 {
267         return -EINVAL;
268 }
269
270 asmlinkage int sys_getpagesize(void)
271 {
272         return PAGE_SIZE;
273 }
274
275 #if defined(CONFIG_SYSCALL_PRINT)
276 asmlinkage void syscall_print(void *dummy,...)
277 {
278         struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4);
279         printk("call %06lx:%ld 1:%08lx,2:%08lx,3:%08lx,ret:%08lx\n",
280                ((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
281 }
282 #endif