/*      $NetBSD: SYS.h,v 1.2 2014/09/05 18:09:37 matt Exp $     */

/*-
 * Copyright (c) 2014 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matt Thomas of 3am Software Foundry.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <machine/asm.h>
#include <sys/syscall.h>
#include "sysassym.h"

#define _DOSYSCALL(x)           l.addi  r13,r0,(SYS_ ## x)      ;\
                                l.sys   0                       ;\
                                l.nop

#define _SYSCALL_NOERROR(x,y)   ENTRY(x)                        ;\
                                .if NSYSARGS_##y > 6            ;\
                                l.lwz   r11, 0(r1)              ;\
                                .endif                          ;\
                                .if NSYSARGS_##y > 7            ;\
                                l.lwz   r12, 4(r1)              ;\
                                .endif                          ;\
                                _DOSYSCALL(y)

#define _SYSCALL(x,y)           _SYSCALL_NOERROR(x,y)           ;\
                                l.bf    _C_LABEL(__cerror)      ;\
                                l.nop

#define SYSCALL_NOERROR(x)      _SYSCALL_NOERROR(x,x)

#define SYSCALL(x)              _SYSCALL(x,x)

#define PSEUDO_NOERROR(x,y)     _SYSCALL_NOERROR(x,y)           ;\
                                l.jr    lr                      ;\
                                l.nop                           ;\
                                END(x)

#define PSEUDO(x,y)             _SYSCALL_NOERROR(x,y)           ;\
                                l.bf    _C_LABEL(__cerror)      ;\
                                l.nop                           ;\
                                l.jr    lr                      ;\
                                l.nop                           ;\
                                END(x)

#define RSYSCALL_NOERROR(x)     PSEUDO_NOERROR(x,x)

#define RSYSCALL(x)             PSEUDO(x,x)

#define WSYSCALL(weak,strong)   WEAK_ALIAS(weak,strong)         ;\
                                PSEUDO(strong,weak)