Aurelien Jacquiot | a7f626c | 2011-10-04 11:14:47 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Texas Instruments Incorporated |
| 3 | * Author: Mark Salter <msalter@redhat.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | */ |
| 10 | |
| 11 | #ifndef __ASM_C6X_SYSCALL_H |
| 12 | #define __ASM_C6X_SYSCALL_H |
| 13 | |
| 14 | #include <linux/err.h> |
| 15 | #include <linux/sched.h> |
| 16 | |
| 17 | static inline int syscall_get_nr(struct task_struct *task, |
| 18 | struct pt_regs *regs) |
| 19 | { |
| 20 | return regs->b0; |
| 21 | } |
| 22 | |
| 23 | static inline void syscall_rollback(struct task_struct *task, |
| 24 | struct pt_regs *regs) |
| 25 | { |
| 26 | /* do nothing */ |
| 27 | } |
| 28 | |
| 29 | static inline long syscall_get_error(struct task_struct *task, |
| 30 | struct pt_regs *regs) |
| 31 | { |
| 32 | return IS_ERR_VALUE(regs->a4) ? regs->a4 : 0; |
| 33 | } |
| 34 | |
| 35 | static inline long syscall_get_return_value(struct task_struct *task, |
| 36 | struct pt_regs *regs) |
| 37 | { |
| 38 | return regs->a4; |
| 39 | } |
| 40 | |
| 41 | static inline void syscall_set_return_value(struct task_struct *task, |
| 42 | struct pt_regs *regs, |
| 43 | int error, long val) |
| 44 | { |
| 45 | regs->a4 = error ?: val; |
| 46 | } |
| 47 | |
| 48 | static inline void syscall_get_arguments(struct task_struct *task, |
| 49 | struct pt_regs *regs, unsigned int i, |
| 50 | unsigned int n, unsigned long *args) |
| 51 | { |
| 52 | switch (i) { |
| 53 | case 0: |
| 54 | if (!n--) |
| 55 | break; |
| 56 | *args++ = regs->a4; |
| 57 | case 1: |
| 58 | if (!n--) |
| 59 | break; |
| 60 | *args++ = regs->b4; |
| 61 | case 2: |
| 62 | if (!n--) |
| 63 | break; |
| 64 | *args++ = regs->a6; |
| 65 | case 3: |
| 66 | if (!n--) |
| 67 | break; |
| 68 | *args++ = regs->b6; |
| 69 | case 4: |
| 70 | if (!n--) |
| 71 | break; |
| 72 | *args++ = regs->a8; |
| 73 | case 5: |
| 74 | if (!n--) |
| 75 | break; |
| 76 | *args++ = regs->b8; |
| 77 | case 6: |
| 78 | if (!n--) |
| 79 | break; |
| 80 | default: |
| 81 | BUG(); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | static inline void syscall_set_arguments(struct task_struct *task, |
| 86 | struct pt_regs *regs, |
| 87 | unsigned int i, unsigned int n, |
| 88 | const unsigned long *args) |
| 89 | { |
| 90 | switch (i) { |
| 91 | case 0: |
| 92 | if (!n--) |
| 93 | break; |
| 94 | regs->a4 = *args++; |
| 95 | case 1: |
| 96 | if (!n--) |
| 97 | break; |
| 98 | regs->b4 = *args++; |
| 99 | case 2: |
| 100 | if (!n--) |
| 101 | break; |
| 102 | regs->a6 = *args++; |
| 103 | case 3: |
| 104 | if (!n--) |
| 105 | break; |
| 106 | regs->b6 = *args++; |
| 107 | case 4: |
| 108 | if (!n--) |
| 109 | break; |
| 110 | regs->a8 = *args++; |
| 111 | case 5: |
| 112 | if (!n--) |
| 113 | break; |
| 114 | regs->a9 = *args++; |
| 115 | case 6: |
| 116 | if (!n) |
| 117 | break; |
| 118 | default: |
| 119 | BUG(); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | #endif /* __ASM_C6X_SYSCALLS_H */ |