OpenCores
URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [or32/] [kernel/] [syscalls.c] - Blame information for rev 1777

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 1624 jcastillo 
/*
2 
 * linux/arch/or32/kernel/syscalls.c
3 
 *
4 
 * Based on:
5 
 *
6 
 * linux/arch/m68knommu/kernel/sys_m68k.c
7 
 *
8 
 * This file contains various random system calls that
9 
 * have a non-standard calling sequence on the Linux/or32
10 
 * platform.
11 
 */
12 
 
13 
#include <linux/errno.h>
14 
#include <linux/sched.h>
15 
#include <linux/mm.h>
16 
#include <linux/sem.h>
17 
#include <linux/msg.h>
18 
#include <linux/shm.h>
19 
#include <linux/stat.h>
20 
#include <linux/mman.h>
21 
 
22 
#include <asm/segment.h>
23 
#include <asm/traps.h>
24 
 
25 
/*
26 
 * sys_pipe() is the normal C calling standard for creating
27 
 * a pipe. It's not the way unix traditionally does this, though.
28 
 */
29 
asmlinkage int sys_pipe(unsigned long * fildes)
30 
{
31 
        int fd[2];
32 
        int error;
33 
 
34 
        error = verify_area(VERIFY_WRITE,fildes,8);
35 
        if (error)
36 
                return error;
37 
        error = do_pipe(fd);
38 
        if (error)
39 
                return error;
40 
        put_user(fd[0],0+fildes);
41 
        put_user(fd[1],1+fildes);
42 
        return 0;
43 
}
44 
 
45 
/*
46 
 * Perform the select(nd, in, out, ex, tv) and mmap() system
47 
 * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
48 
 * handle more than 4 system call parameters, so these system calls
49 
 * used a memory block for parameter passing..
50 
 */
51 
 
52 
asmlinkage int old_mmap(unsigned long *buffer)
53 
{
54 
        int error;
55 
        unsigned long flags;
56 
        struct file * file = NULL;
57 
 
58 
        error = verify_area(VERIFY_READ, buffer, 6*sizeof(long));
59 
        if (error)
60 
                return error;
61 
        flags = get_user(buffer+3);
62 
        if (!(flags & MAP_ANONYMOUS)) {
63 
                unsigned long fd = get_user(buffer+4);
64 
                if (fd >= NR_OPEN || !(file = current->files->fd[fd]))
65 
                        return -EBADF;
66 
        }
67 
        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
68 
        return do_mmap(file, get_user(buffer), get_user(buffer+1),
69 
                       get_user(buffer+2), flags, get_user(buffer+5));
70 
}
71 
 
72 
 
73 
extern asmlinkage int sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
74 
 
75 
asmlinkage int old_select(unsigned long *buffer)
76 
{
77 
        int n;
78 
        fd_set *inp;
79 
        fd_set *outp;
80 
        fd_set *exp;
81 
        struct timeval *tvp;
82 
 
83 
        n = verify_area(VERIFY_READ, buffer, 5*sizeof(unsigned long));
84 
        if (n)
85 
          return n;
86 
 
87 
        n = get_user(buffer);
88 
        inp = (fd_set *) get_user(buffer+1);
89 
        outp = (fd_set *) get_user(buffer+2);
90 
        exp = (fd_set *) get_user(buffer+3);
91 
        tvp = (struct timeval *) get_user(buffer+4);
92 
        return sys_select(n, inp, outp, exp, tvp);
93 
}
94 
 
95 
/*
96 
 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
97 
 *
98 
 * This is really horribly ugly.
99 
 */
100 
asmlinkage int sys_ipc (uint call, int first, int second, int third, void *ptr, long fifth)
101 
{
102 
        int version;
103 
 
104 
        version = call >> 16; /* hack for backward compatibility */
105 
        call &= 0xffff;
106 
 
107 
        if (call <= SEMCTL)
108 
                switch (call) {
109 
                case SEMOP:
110 
                        return sys_semop (first, (struct sembuf *)ptr, second);
111 
                case SEMGET:
112 
                        return sys_semget (first, second, third);
113 
                case SEMCTL: {
114 
                        union semun fourth;
115 
                        int err;
116 
                        if (!ptr)
117 
                                return -EINVAL;
118 
                        if ((err = verify_area (VERIFY_READ, ptr, sizeof(long))))
119 
                                return err;
120 
                        fourth.__pad = get_user((void **)ptr);
121 
                        return sys_semctl (first, second, third, fourth);
122 
                        }
123 
                default:
124 
                        return -EINVAL;
125 
                }
126 
        if (call <= MSGCTL)
127 
                switch (call) {
128 
                case MSGSND:
129 
                        return sys_msgsnd (first, (struct msgbuf *) ptr,
130 
                                           second, third);
131 
                case MSGRCV:
132 
                        switch (version) {
133 
                        case 0: {
134 
                                struct ipc_kludge tmp;
135 
                                int err;
136 
                                if (!ptr)
137 
                                        return -EINVAL;
138 
                                if ((err = verify_area (VERIFY_READ, ptr, sizeof(tmp))))
139 
                                        return err;
140 
                                memcpy_fromfs (&tmp,(struct ipc_kludge *) ptr,
141 
                                               sizeof (tmp));
142 
                                return sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, third);
143 
                                }
144 
                        case 1: default:
145 
                                return sys_msgrcv (first, (struct msgbuf *) ptr, second, fifth, third);
146 
                        }
147 
                case MSGGET:
148 
                        return sys_msgget ((key_t) first, second);
149 
                case MSGCTL:
150 
                        return sys_msgctl (first, second, (struct msqid_ds *) ptr);
151 
                default:
152 
                        return -EINVAL;
153 
                }
154 
        if (call <= SHMCTL)
155 
                switch (call) {
156 
                case SHMAT:
157 
                        switch (version) {
158 
                        case 0: default: {
159 
                                ulong raddr;
160 
                                int err;
161 
                                if ((err = verify_area(VERIFY_WRITE, (ulong*) third, sizeof(ulong))))
162 
                                        return err;
163 
                                err = sys_shmat (first, (char *) ptr, second, &raddr);
164 
                                if (err)
165 
                                        return err;
166 
                                put_user (raddr, (ulong *) third);
167 
                                return 0;
168 
                                }
169 
                        case 1: /* iBCS2 emulator entry point */
170 
                                if (get_fs() != get_ds())
171 
                                        return -EINVAL;
172 
                                return sys_shmat (first, (char *) ptr, second, (ulong *) third);
173 
                        }
174 
                case SHMDT:
175 
                        return sys_shmdt ((char *)ptr);
176 
                case SHMGET:
177 
                        return sys_shmget (first, second, third);
178 
                case SHMCTL:
179 
                        return sys_shmctl (first, second, (struct shmid_ds *) ptr);
180 
                default:
181 
                        return -EINVAL;
182 
                }
183 
        return -EINVAL;
184 
}
185 
 
186 
asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on)
187 
{
188 
  return -ENOSYS;
189 
}
190 
 
191 
/* sys_cacheflush -- flush (part of) the processor cache.  */
192 
asmlinkage int
193 
sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
194 
{
195 
        return 0;
196 
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.