1 #include <linux/file.h>
3 #include <linux/module.h>
4 #include <linux/mount.h>
5 #include <linux/namei.h>
7 #include <asm/uaccess.h>
12 * sys_spu_run - run code loaded into an SPU
14 * @unpc: next program counter for the SPU
15 * @ustatus: status of the SPU
17 * This system call transfers the control of execution of a
18 * user space thread to an SPU. It will return when the
19 * SPU has finished executing or when it hits an error
20 * condition and it will be interrupted if a signal needs
21 * to be delivered to a handler in user space.
23 * The next program counter is set to the passed value
24 * before the SPU starts fetching code and the user space
25 * pointer gets updated with the new value when returning
28 * The status value returned from spu_run reflects the
29 * value of the spu_status register after the SPU has stopped.
32 static long do_spu_run(struct file *filp,
34 __u32 __user *ustatus)
37 struct spufs_inode_info *i;
41 if (get_user(npc, unpc))
44 /* check if this file was created by spu_create */
46 if (filp->f_op != &spufs_context_fops)
49 i = SPUFS_I(filp->f_path.dentry->d_inode);
50 ret = spufs_run_spu(i->i_ctx, &npc, &status);
52 if (put_user(npc, unpc))
55 if (ustatus && put_user(status, ustatus))
62 asmlinkage long sys_spu_run(int fd, __u32 __user *unpc, __u32 __user *ustatus)
69 filp = fget_light(fd, &fput_needed);
71 ret = do_spu_run(filp, unpc, ustatus);
72 fput_light(filp, fput_needed);
79 asmlinkage long do_spu_create(const char __user *pathname, unsigned int flags,
80 mode_t mode, struct file *neighbor)
85 tmp = getname(pathname);
90 ret = path_lookup(tmp, LOOKUP_PARENT|
91 LOOKUP_OPEN|LOOKUP_CREATE, &nd);
93 ret = spufs_create(&nd, flags, mode, neighbor);
103 asmlinkage long sys_spu_create(const char __user *pathname, unsigned int flags,
104 mode_t mode, int neighbor_fd)
107 struct file *neighbor;
110 if (flags & SPU_CREATE_AFFINITY_SPU) {
112 neighbor = fget_light(neighbor_fd, &fput_needed);
114 ret = do_spu_create(pathname, flags, mode, neighbor);
115 fput_light(neighbor, fput_needed);
119 ret = do_spu_create(pathname, flags, mode, NULL);
126 struct spufs_calls spufs_calls = {
127 .create_thread = do_spu_create,
128 .spu_run = do_spu_run,
129 .owner = THIS_MODULE,