First Support on Ginger and OMAP TI
[linux-ginger.git] / arch / h8300 / kernel / sys_h8300.c
blob8cb5d73a0e357cbc530b6d2a408c7a5b8065009b
1 /*
2 * linux/arch/h8300/kernel/sys_h8300.c
4 * This file contains various random system calls that
5 * have a non-standard calling sequence on the H8/300
6 * platform.
7 */
9 #include <linux/errno.h>
10 #include <linux/sched.h>
11 #include <linux/mm.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/fs.h>
21 #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/unistd.h>
29 /* common code for old and new mmaps */
30 static inline long do_mmap2(
31 unsigned long addr, unsigned long len,
32 unsigned long prot, unsigned long flags,
33 unsigned long fd, unsigned long pgoff)
35 int error = -EBADF;
36 struct file * file = NULL;
38 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
39 if (!(flags & MAP_ANONYMOUS)) {
40 file = fget(fd);
41 if (!file)
42 goto out;
45 down_write(&current->mm->mmap_sem);
46 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
47 up_write(&current->mm->mmap_sem);
49 if (file)
50 fput(file);
51 out:
52 return error;
55 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
56 unsigned long prot, unsigned long flags,
57 unsigned long fd, unsigned long pgoff)
59 return do_mmap2(addr, len, prot, flags, fd, pgoff);
63 * Perform the select(nd, in, out, ex, tv) and mmap() system
64 * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
65 * handle more than 4 system call parameters, so these system calls
66 * used a memory block for parameter passing..
69 struct mmap_arg_struct {
70 unsigned long addr;
71 unsigned long len;
72 unsigned long prot;
73 unsigned long flags;
74 unsigned long fd;
75 unsigned long offset;
78 asmlinkage int old_mmap(struct mmap_arg_struct *arg)
80 struct mmap_arg_struct a;
81 int error = -EFAULT;
83 if (copy_from_user(&a, arg, sizeof(a)))
84 goto out;
86 error = -EINVAL;
87 if (a.offset & ~PAGE_MASK)
88 goto out;
90 a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
92 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
93 out:
94 return error;
97 #if 0 /* DAVIDM - do we want this */
98 struct mmap_arg_struct64 {
99 __u32 addr;
100 __u32 len;
101 __u32 prot;
102 __u32 flags;
103 __u64 offset; /* 64 bits */
104 __u32 fd;
107 asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg)
109 int error = -EFAULT;
110 struct file * file = NULL;
111 struct mmap_arg_struct64 a;
112 unsigned long pgoff;
114 if (copy_from_user(&a, arg, sizeof(a)))
115 return -EFAULT;
117 if ((long)a.offset & ~PAGE_MASK)
118 return -EINVAL;
120 pgoff = a.offset >> PAGE_SHIFT;
121 if ((a.offset >> PAGE_SHIFT) != pgoff)
122 return -EINVAL;
124 if (!(a.flags & MAP_ANONYMOUS)) {
125 error = -EBADF;
126 file = fget(a.fd);
127 if (!file)
128 goto out;
130 a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
132 down_write(&current->mm->mmap_sem);
133 error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff);
134 up_write(&current->mm->mmap_sem);
135 if (file)
136 fput(file);
137 out:
138 return error;
140 #endif
142 struct sel_arg_struct {
143 unsigned long n;
144 fd_set *inp, *outp, *exp;
145 struct timeval *tvp;
148 asmlinkage int old_select(struct sel_arg_struct *arg)
150 struct sel_arg_struct a;
152 if (copy_from_user(&a, arg, sizeof(a)))
153 return -EFAULT;
154 /* sys_select() does the appropriate kernel locking */
155 return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
159 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
161 * This is really horribly ugly.
163 asmlinkage int sys_ipc (uint call, int first, int second,
164 int third, void *ptr, long fifth)
166 int version, ret;
168 version = call >> 16; /* hack for backward compatibility */
169 call &= 0xffff;
171 if (call <= SEMCTL)
172 switch (call) {
173 case SEMOP:
174 return sys_semop (first, (struct sembuf *)ptr, second);
175 case SEMGET:
176 return sys_semget (first, second, third);
177 case SEMCTL: {
178 union semun fourth;
179 if (!ptr)
180 return -EINVAL;
181 if (get_user(fourth.__pad, (void **) ptr))
182 return -EFAULT;
183 return sys_semctl (first, second, third, fourth);
185 default:
186 return -EINVAL;
188 if (call <= MSGCTL)
189 switch (call) {
190 case MSGSND:
191 return sys_msgsnd (first, (struct msgbuf *) ptr,
192 second, third);
193 case MSGRCV:
194 switch (version) {
195 case 0: {
196 struct ipc_kludge tmp;
197 if (!ptr)
198 return -EINVAL;
199 if (copy_from_user (&tmp,
200 (struct ipc_kludge *)ptr,
201 sizeof (tmp)))
202 return -EFAULT;
203 return sys_msgrcv (first, tmp.msgp, second,
204 tmp.msgtyp, third);
206 default:
207 return sys_msgrcv (first,
208 (struct msgbuf *) ptr,
209 second, fifth, third);
211 case MSGGET:
212 return sys_msgget ((key_t) first, second);
213 case MSGCTL:
214 return sys_msgctl (first, second,
215 (struct msqid_ds *) ptr);
216 default:
217 return -EINVAL;
219 if (call <= SHMCTL)
220 switch (call) {
221 case SHMAT:
222 switch (version) {
223 default: {
224 ulong raddr;
225 ret = do_shmat (first, (char *) ptr,
226 second, &raddr);
227 if (ret)
228 return ret;
229 return put_user (raddr, (ulong *) third);
232 case SHMDT:
233 return sys_shmdt ((char *)ptr);
234 case SHMGET:
235 return sys_shmget (first, second, third);
236 case SHMCTL:
237 return sys_shmctl (first, second,
238 (struct shmid_ds *) ptr);
239 default:
240 return -EINVAL;
243 return -EINVAL;
246 /* sys_cacheflush -- no support. */
247 asmlinkage int
248 sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
250 return -EINVAL;
253 asmlinkage int sys_getpagesize(void)
255 return PAGE_SIZE;
258 #if defined(CONFIG_SYSCALL_PRINT)
259 asmlinkage void syscall_print(void *dummy,...)
261 struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4);
262 printk("call %06lx:%ld 1:%08lx,2:%08lx,3:%08lx,ret:%08lx\n",
263 ((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
265 #endif
268 * Do a system call from kernel instead of calling sys_execve so we
269 * end up with proper pt_regs.
271 int kernel_execve(const char *filename, char *const argv[], char *const envp[])
273 register long res __asm__("er0");
274 register char *const *_c __asm__("er3") = envp;
275 register char *const *_b __asm__("er2") = argv;
276 register const char * _a __asm__("er1") = filename;
277 __asm__ __volatile__ ("mov.l %1,er0\n\t"
278 "trapa #0\n\t"
279 : "=r" (res)
280 : "g" (__NR_execve),
281 "g" (_a),
282 "g" (_b),
283 "g" (_c)
284 : "cc", "memory");
285 return res;