Merge branch 'drivers-platform' into release
[sfrench/cifs-2.6.git] / arch / sh / include / asm / syscall_64.h
1 #ifndef __ASM_SH_SYSCALL_64_H
2 #define __ASM_SH_SYSCALL_64_H
3
4 #include <linux/kernel.h>
5 #include <linux/sched.h>
6 #include <asm/ptrace.h>
7
8 /* The system call number is given by the user in R9 */
9 static inline long syscall_get_nr(struct task_struct *task,
10                                   struct pt_regs *regs)
11 {
12         return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
13 }
14
15 static inline void syscall_rollback(struct task_struct *task,
16                                     struct pt_regs *regs)
17 {
18         /*
19          * XXX: This needs some thought. On SH we don't
20          * save away the original R9 value anywhere.
21          */
22 }
23
24 static inline bool syscall_has_error(struct pt_regs *regs)
25 {
26         return (regs->sr & 0x1) ? true : false;
27 }
28 static inline void syscall_set_error(struct pt_regs *regs)
29 {
30         regs->sr |= 0x1;
31 }
32 static inline void syscall_clear_error(struct pt_regs *regs)
33 {
34         regs->sr &= ~0x1;
35 }
36
37 static inline long syscall_get_error(struct task_struct *task,
38                                      struct pt_regs *regs)
39 {
40         return syscall_has_error(regs) ? regs->regs[9] : 0;
41 }
42
43 static inline long syscall_get_return_value(struct task_struct *task,
44                                             struct pt_regs *regs)
45 {
46         return regs->regs[9];
47 }
48
49 static inline void syscall_set_return_value(struct task_struct *task,
50                                             struct pt_regs *regs,
51                                             int error, long val)
52 {
53         if (error) {
54                 syscall_set_error(regs);
55                 regs->regs[9] = -error;
56         } else {
57                 syscall_clear_error(regs);
58                 regs->regs[9] = val;
59         }
60 }
61
62 static inline void syscall_get_arguments(struct task_struct *task,
63                                          struct pt_regs *regs,
64                                          unsigned int i, unsigned int n,
65                                          unsigned long *args)
66 {
67         BUG_ON(i + n > 6);
68         memcpy(args, &regs->regs[2 + i], n * sizeof(args[0]));
69 }
70
71 static inline void syscall_set_arguments(struct task_struct *task,
72                                          struct pt_regs *regs,
73                                          unsigned int i, unsigned int n,
74                                          const unsigned long *args)
75 {
76         BUG_ON(i + n > 6);
77         memcpy(&regs->regs[2 + i], args, n * sizeof(args[0]));
78 }
79
80 #endif /* __ASM_SH_SYSCALL_64_H */