WIP FPC-III support
[linux/fpc-iii.git] / arch / xtensa / include / asm / syscall.h
blobf9a671cbf9338003704de9c2daf006219b1b8eb9
1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
6 * Copyright (C) 2001 - 2007 Tensilica Inc.
7 * Copyright (C) 2018 Cadence Design Systems Inc.
8 */
10 #ifndef _ASM_SYSCALL_H
11 #define _ASM_SYSCALL_H
13 #include <linux/err.h>
14 #include <asm/ptrace.h>
15 #include <uapi/linux/audit.h>
17 static inline int syscall_get_arch(struct task_struct *task)
19 return AUDIT_ARCH_XTENSA;
22 typedef void (*syscall_t)(void);
23 extern syscall_t sys_call_table[];
25 static inline long syscall_get_nr(struct task_struct *task,
26 struct pt_regs *regs)
28 return regs->syscall;
31 static inline void syscall_rollback(struct task_struct *task,
32 struct pt_regs *regs)
34 /* Do nothing. */
37 static inline long syscall_get_error(struct task_struct *task,
38 struct pt_regs *regs)
40 /* 0 if syscall succeeded, otherwise -Errorcode */
41 return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
44 static inline long syscall_get_return_value(struct task_struct *task,
45 struct pt_regs *regs)
47 return regs->areg[2];
50 static inline void syscall_set_return_value(struct task_struct *task,
51 struct pt_regs *regs,
52 int error, long val)
54 regs->areg[2] = (long) error ? error : val;
57 #define SYSCALL_MAX_ARGS 6
58 #define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
60 static inline void syscall_get_arguments(struct task_struct *task,
61 struct pt_regs *regs,
62 unsigned long *args)
64 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
65 unsigned int i;
67 for (i = 0; i < 6; ++i)
68 args[i] = regs->areg[reg[i]];
71 static inline void syscall_set_arguments(struct task_struct *task,
72 struct pt_regs *regs,
73 const unsigned long *args)
75 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
76 unsigned int i;
78 for (i = 0; i < 6; ++i)
79 regs->areg[reg[i]] = args[i];
82 asmlinkage long xtensa_rt_sigreturn(void);
83 asmlinkage long xtensa_shmat(int, char __user *, int);
84 asmlinkage long xtensa_fadvise64_64(int, int,
85 unsigned long long, unsigned long long);
87 #endif