/*      $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)

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