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      1 /*	$NetBSD: SYS.h,v 1.2 2014/09/05 18:09:37 matt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <machine/asm.h>
     33 #include <sys/syscall.h>
     34 #include "sysassym.h"
     35 
     36 #define	_DOSYSCALL(x)		l.addi	r13,r0,(SYS_ ## x)	;\
     37 				l.sys	0			;\
     38 				l.nop
     39 
     40 #define	_SYSCALL_NOERROR(x,y)	ENTRY(x)			;\
     41 				.if NSYSARGS_##y > 6		;\
     42 				l.lwz	r11, 0(r1)		;\
     43 				.endif				;\
     44 				.if NSYSARGS_##y > 7		;\
     45 				l.lwz	r12, 4(r1)		;\
     46 				.endif				;\
     47 				_DOSYSCALL(y)
     48 
     49 #define _SYSCALL(x,y)		_SYSCALL_NOERROR(x,y)		;\
     50 				l.bf	_C_LABEL(__cerror)	;\
     51 				l.nop
     52 
     53 #define SYSCALL_NOERROR(x)	_SYSCALL_NOERROR(x,x)
     54 
     55 #define SYSCALL(x)		_SYSCALL(x,x)
     56 
     57 #define PSEUDO_NOERROR(x,y)	_SYSCALL_NOERROR(x,y)		;\
     58 				l.jr	lr			;\
     59 				l.nop				;\
     60 				END(x)
     61 
     62 #define PSEUDO(x,y)		_SYSCALL_NOERROR(x,y)		;\
     63 				l.bf	_C_LABEL(__cerror)	;\
     64 				l.nop				;\
     65 				l.jr	lr			;\
     66 				l.nop				;\
     67 				END(x)
     68 
     69 #define RSYSCALL_NOERROR(x)	PSEUDO_NOERROR(x,x)
     70 
     71 #define RSYSCALL(x)		PSEUDO(x,x)
     72 
     73 #define	WSYSCALL(weak,strong)	WEAK_ALIAS(weak,strong)		;\
     74 				PSEUDO(strong,weak)
     75