/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 - 2007 Tensilica Inc.
 * Copyright (C) 2018 Cadence Design Systems Inc.
 */

#ifndef _ASM_SYSCALL_H
#define _ASM_SYSCALL_H

#include <linux/err.h>
#include <asm/ptrace.h>
#include <uapi/linux/audit.h>

static inline int syscall_get_arch(struct task_struct *task)
{
        return AUDIT_ARCH_XTENSA;
}

typedef void (*syscall_t)(void);
extern syscall_t sys_call_table[];

static inline long syscall_get_nr(struct task_struct *task,
                                  struct pt_regs *regs)
{
        return regs->syscall;
}

static inline void syscall_set_nr(struct task_struct *task,
                                  struct pt_regs *regs,
                                  int nr)
{
        regs->syscall = nr;
}

static inline void syscall_rollback(struct task_struct *task,
                                    struct pt_regs *regs)
{
        /* Do nothing. */
}

static inline long syscall_get_error(struct task_struct *task,
                                     struct pt_regs *regs)
{
        /* 0 if syscall succeeded, otherwise -Errorcode */
        return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
}

static inline long syscall_get_return_value(struct task_struct *task,
                                            struct pt_regs *regs)
{
        return regs->areg[2];
}

static inline void syscall_set_return_value(struct task_struct *task,
                                            struct pt_regs *regs,
                                            int error, long val)
{
        regs->areg[2] = (long) error ? error : val;
}

#define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}

static inline void syscall_get_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
                                         unsigned long *args)
{
        static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
        unsigned int i;

        for (i = 0; i < 6; ++i)
                args[i] = regs->areg[reg[i]];
}

static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
                                         const unsigned long *args)
{
        static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
        unsigned int i;

        for (i = 0; i < 6; ++i)
                regs->areg[reg[i]] = args[i];
}

asmlinkage long xtensa_rt_sigreturn(void);
asmlinkage long xtensa_shmat(int, char __user *, int);
asmlinkage long xtensa_fadvise64_64(int, int,
                                    unsigned long long, unsigned long long);

#endif