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d5b37092 MS |
1 | #ifndef __ASM_MICROBLAZE_SYSCALL_H |
2 | #define __ASM_MICROBLAZE_SYSCALL_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 R12 */ | |
9 | static inline long syscall_get_nr(struct task_struct *task, | |
10 | struct pt_regs *regs) | |
11 | { | |
12 | return regs->r12; | |
13 | } | |
14 | ||
15 | static inline void syscall_rollback(struct task_struct *task, | |
16 | struct pt_regs *regs) | |
17 | { | |
18 | /* TODO. */ | |
19 | } | |
20 | ||
21 | static inline long syscall_get_error(struct task_struct *task, | |
22 | struct pt_regs *regs) | |
23 | { | |
24 | return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0; | |
25 | } | |
26 | ||
27 | static inline long syscall_get_return_value(struct task_struct *task, | |
28 | struct pt_regs *regs) | |
29 | { | |
30 | return regs->r3; | |
31 | } | |
32 | ||
33 | static inline void syscall_set_return_value(struct task_struct *task, | |
34 | struct pt_regs *regs, | |
35 | int error, long val) | |
36 | { | |
37 | if (error) | |
38 | regs->r3 = -error; | |
39 | else | |
40 | regs->r3 = val; | |
41 | } | |
42 | ||
43 | static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs, | |
44 | unsigned int n) | |
45 | { | |
46 | switch (n) { | |
47 | case 5: return regs->r10; | |
48 | case 4: return regs->r9; | |
49 | case 3: return regs->r8; | |
50 | case 2: return regs->r7; | |
51 | case 1: return regs->r6; | |
52 | case 0: return regs->r5; | |
53 | default: | |
54 | BUG(); | |
55 | } | |
56 | return ~0; | |
57 | } | |
58 | ||
59 | static inline void microblaze_set_syscall_arg(struct pt_regs *regs, | |
60 | unsigned int n, | |
61 | unsigned long val) | |
62 | { | |
63 | switch (n) { | |
64 | case 5: | |
65 | regs->r10 = val; | |
66 | case 4: | |
67 | regs->r9 = val; | |
68 | case 3: | |
69 | regs->r8 = val; | |
70 | case 2: | |
71 | regs->r7 = val; | |
72 | case 1: | |
73 | regs->r6 = val; | |
74 | case 0: | |
75 | regs->r5 = val; | |
76 | default: | |
77 | BUG(); | |
78 | } | |
79 | } | |
80 | ||
81 | static inline void syscall_get_arguments(struct task_struct *task, | |
82 | struct pt_regs *regs, | |
83 | unsigned int i, unsigned int n, | |
84 | unsigned long *args) | |
85 | { | |
86 | while (n--) | |
87 | *args++ = microblaze_get_syscall_arg(regs, i++); | |
88 | } | |
89 | ||
90 | static inline void syscall_set_arguments(struct task_struct *task, | |
91 | struct pt_regs *regs, | |
92 | unsigned int i, unsigned int n, | |
93 | const unsigned long *args) | |
94 | { | |
95 | while (n--) | |
96 | microblaze_set_syscall_arg(regs, i++, *args++); | |
97 | } | |
98 | ||
c1df53b3 MS |
99 | asmlinkage long do_syscall_trace_enter(struct pt_regs *regs); |
100 | asmlinkage void do_syscall_trace_leave(struct pt_regs *regs); | |
101 | ||
d5b37092 | 102 | #endif /* __ASM_MICROBLAZE_SYSCALL_H */ |