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authorMichal Simek <monstr@monstr.eu>2009-03-27 09:25:28 -0400
committerMichal Simek <monstr@monstr.eu>2009-03-27 09:25:28 -0400
commit7dcbbb2b17d4ef0d0541708eddfb720e2e422c3b (patch)
tree39607b2cde26579ac0b3357ff539f79012e58bf1 /arch/microblaze/kernel/sys_microblaze.c
parent2b4384542691fddd309f9324b5a9af976b75e918 (diff)
microblaze_v8: IPC support
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/kernel/sys_microblaze.c')
-rw-r--r--arch/microblaze/kernel/sys_microblaze.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c
new file mode 100644
index 000000000000..d90b548fb1bb
--- /dev/null
+++ b/arch/microblaze/kernel/sys_microblaze.c
@@ -0,0 +1,227 @@
1/*
2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2007-2009 PetaLogix
4 * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
5 *
6 * Copyright (C) 2006 Atmark Techno, Inc.
7 * Yasushi SHOJI <yashi@atmark-techno.com>
8 * Tetsuya OHKAWA <tetsuya@atmark-techno.com>
9 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file "COPYING" in the main directory of this archive
12 * for more details.
13 */
14
15#include <linux/errno.h>
16#include <linux/mm.h>
17#include <linux/smp.h>
18#include <linux/smp_lock.h>
19#include <linux/syscalls.h>
20#include <linux/sem.h>
21#include <linux/msg.h>
22#include <linux/shm.h>
23#include <linux/stat.h>
24#include <linux/mman.h>
25#include <linux/sys.h>
26#include <linux/ipc.h>
27#include <linux/utsname.h>
28#include <linux/file.h>
29#include <linux/module.h>
30#include <linux/err.h>
31#include <linux/fs.h>
32#include <linux/ipc.h>
33#include <linux/semaphore.h>
34#include <linux/syscalls.h>
35#include <linux/uaccess.h>
36#include <linux/unistd.h>
37
38#include <asm/syscalls.h>
39/*
40 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
41 *
42 * This is really horribly ugly. This will be remove with new toolchain.
43 */
44asmlinkage int
45sys_ipc(uint call, int first, int second, int third, void *ptr, long fifth)
46{
47 int version, ret;
48
49 version = call >> 16; /* hack for backward compatibility */
50 call &= 0xffff;
51
52 ret = -EINVAL;
53 switch (call) {
54 case SEMOP:
55 ret = sys_semop(first, (struct sembuf *)ptr, second);
56 break;
57 case SEMGET:
58 ret = sys_semget(first, second, third);
59 break;
60 case SEMCTL:
61 {
62 union semun fourth;
63
64 if (!ptr)
65 break;
66 ret = (access_ok(VERIFY_READ, ptr, sizeof(long)) ? 0 : -EFAULT)
67 || (get_user(fourth.__pad, (void **)ptr)) ;
68 if (ret)
69 break;
70 ret = sys_semctl(first, second, third, fourth);
71 break;
72 }
73 case MSGSND:
74 ret = sys_msgsnd(first, (struct msgbuf *) ptr, second, third);
75 break;
76 case MSGRCV:
77 switch (version) {
78 case 0: {
79 struct ipc_kludge tmp;
80
81 if (!ptr)
82 break;
83 ret = (access_ok(VERIFY_READ, ptr, sizeof(tmp))
84 ? 0 : -EFAULT) || copy_from_user(&tmp,
85 (struct ipc_kludge *) ptr, sizeof(tmp));
86 if (ret)
87 break;
88 ret = sys_msgrcv(first, tmp.msgp, second, tmp.msgtyp,
89 third);
90 break;
91 }
92 default:
93 ret = sys_msgrcv(first, (struct msgbuf *) ptr,
94 second, fifth, third);
95 break;
96 }
97 break;
98 case MSGGET:
99 ret = sys_msgget((key_t) first, second);
100 break;
101 case MSGCTL:
102 ret = sys_msgctl(first, second, (struct msqid_ds *) ptr);
103 break;
104 case SHMAT:
105 switch (version) {
106 default: {
107 ulong raddr;
108 ret = access_ok(VERIFY_WRITE, (ulong *) third,
109 sizeof(ulong)) ? 0 : -EFAULT;
110 if (ret)
111 break;
112 ret = do_shmat(first, (char *) ptr, second, &raddr);
113 if (ret)
114 break;
115 ret = put_user(raddr, (ulong *) third);
116 break;
117 }
118 case 1: /* iBCS2 emulator entry point */
119 if (!segment_eq(get_fs(), get_ds()))
120 break;
121 ret = do_shmat(first, (char *) ptr, second,
122 (ulong *) third);
123 break;
124 }
125 break;
126 case SHMDT:
127 ret = sys_shmdt((char *)ptr);
128 break;
129 case SHMGET:
130 ret = sys_shmget(first, second, third);
131 break;
132 case SHMCTL:
133 ret = sys_shmctl(first, second, (struct shmid_ds *) ptr);
134 break;
135 }
136 return -EINVAL;
137}
138
139asmlinkage int sys_vfork(struct pt_regs *regs)
140{
141 return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1,
142 regs, 0, NULL, NULL);
143}
144
145asmlinkage int sys_clone(int flags, unsigned long stack, struct pt_regs *regs)
146{
147 if (!stack)
148 stack = regs->r1;
149 return do_fork(flags, stack, regs, 0, NULL, NULL);
150}
151
152asmlinkage int sys_execve(char __user *filenamei, char __user *__user *argv,
153 char __user *__user *envp, struct pt_regs *regs)
154{
155 int error;
156 char *filename;
157
158 filename = getname(filenamei);
159 error = PTR_ERR(filename);
160 if (IS_ERR(filename))
161 goto out;
162 error = do_execve(filename, argv, envp, regs);
163 putname(filename);
164out:
165 return error;
166}
167
168asmlinkage unsigned long
169sys_mmap2(unsigned long addr, size_t len,
170 unsigned long prot, unsigned long flags,
171 unsigned long fd, unsigned long pgoff)
172{
173 struct file *file = NULL;
174 int ret = -EBADF;
175
176 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
177 if (!(flags & MAP_ANONYMOUS)) {
178 file = fget(fd);
179 if (!file) {
180 printk(KERN_INFO "no fd in mmap\r\n");
181 goto out;
182 }
183 }
184
185 down_write(&current->mm->mmap_sem);
186 ret = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
187 up_write(&current->mm->mmap_sem);
188 if (file)
189 fput(file);
190out:
191 return ret;
192}
193
194asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
195 unsigned long prot, unsigned long flags,
196 unsigned long fd, off_t offset)
197{
198 int err = -EINVAL;
199
200 if (offset & ~PAGE_MASK) {
201 printk(KERN_INFO "no pagemask in mmap\r\n");
202 goto out;
203 }
204
205 err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
206out:
207 return err;
208}
209
210/*
211 * Do a system call from kernel instead of calling sys_execve so we
212 * end up with proper pt_regs.
213 */
214int kernel_execve(const char *filename, char *const argv[], char *const envp[])
215{
216 register const char *__a __asm__("r5") = filename;
217 register const void *__b __asm__("r6") = argv;
218 register const void *__c __asm__("r7") = envp;
219 register unsigned long __syscall __asm__("r12") = __NR_execve;
220 register unsigned long __ret __asm__("r3");
221 __asm__ __volatile__ ("brki r14, 0x8"
222 : "=r" (__ret), "=r" (__syscall)
223 : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c)
224 : "r4", "r8", "r9",
225 "r10", "r11", "r14", "cc", "memory");
226 return __ret;
227}
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