projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 867e359b CM |
1 | /* |
| 2 | * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved. | |
| 3 | * Copyright 2010 Tilera Corporation. All Rights Reserved. | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or | |
| 6 | * modify it under the terms of the GNU General Public License | |
| 7 | * as published by the Free Software Foundation, version 2. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, but | |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
| 12 | * NON INFRINGEMENT. See the GNU General Public License for | |
| 13 | * more details. | |
| 14 | * | |
| 15 | * See asm-generic/syscall.h for descriptions of what we must do here. | |
| 16 | */ | |
| 17 | ||
| 18 | #ifndef _ASM_TILE_SYSCALL_H | |
| 19 | #define _ASM_TILE_SYSCALL_H | |
| 20 | ||
| 21 | #include <linux/sched.h> | |
| 22 | #include <linux/err.h> | |
| 23 | #include <arch/abi.h> | |
| 24 | ||
| 25 | /* | |
| 26 | * Only the low 32 bits of orig_r0 are meaningful, so we return int. | |
| 27 | * This importantly ignores the high bits on 64-bit, so comparisons | |
| 28 | * sign-extend the low 32 bits. | |
| 29 | */ | |
| 30 | static inline int syscall_get_nr(struct task_struct *t, struct pt_regs *regs) | |
| 31 | { | |
| 32 | return regs->regs[TREG_SYSCALL_NR]; | |
| 33 | } | |
| 34 | ||
| 35 | static inline void syscall_rollback(struct task_struct *task, | |
| 36 | struct pt_regs *regs) | |
| 37 | { | |
| 38 | regs->regs[0] = regs->orig_r0; | |
| 39 | } | |
| 40 | ||
| 41 | static inline long syscall_get_error(struct task_struct *task, | |
| 42 | struct pt_regs *regs) | |
| 43 | { | |
| 44 | unsigned long error = regs->regs[0]; | |
| 45 | return IS_ERR_VALUE(error) ? error : 0; | |
| 46 | } | |
| 47 | ||
| 48 | static inline long syscall_get_return_value(struct task_struct *task, | |
| 49 | struct pt_regs *regs) | |
| 50 | { | |
| 51 | return regs->regs[0]; | |
| 52 | } | |
| 53 | ||
| 54 | static inline void syscall_set_return_value(struct task_struct *task, | |
| 55 | struct pt_regs *regs, | |
| 56 | int error, long val) | |
| 57 | { | |
| 58 | regs->regs[0] = (long) error ?: val; | |
| 59 | } | |
| 60 | ||
| 61 | static inline void syscall_get_arguments(struct task_struct *task, | |
| 62 | struct pt_regs *regs, | |
| 63 | unsigned int i, unsigned int n, | |
| 64 | unsigned long *args) | |
| 65 | { | |
| 66 | BUG_ON(i + n > 6); | |
| 67 | memcpy(args, ®s[i], n * sizeof(args[0])); | |
| 68 | } | |
| 69 | ||
| 70 | static inline void syscall_set_arguments(struct task_struct *task, | |
| 71 | struct pt_regs *regs, | |
| 72 | unsigned int i, unsigned int n, | |
| 73 | const unsigned long *args) | |
| 74 | { | |
| 75 | BUG_ON(i + n > 6); | |
| 76 | memcpy(®s[i], args, n * sizeof(args[0])); | |
| 77 | } | |
| 78 | ||
| 79 | #endif /* _ASM_TILE_SYSCALL_H */ |