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/*	$NetBSD: dot_init.h,v 1.2 2002/11/22 06:45:00 thorpej Exp $	*/

/*-
 * Copyright (c) 2001 Ross Harvey
 * All rights reserved.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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 <sys/cdefs.h>			/* RCS ID & Copyright macro defns */

/*
 * These must be extern to avoid warnings ("declared static but never defined")
 * However, only the declaration is extern, the actually __asm() defines them
 * as static.
 */
#define INIT_FALLTHRU_DECL void init_fallthru(void)
#define FINI_FALLTHRU_DECL void fini_fallthru(void)

#define INIT_FALLTHRU()	init_fallthru()
#define FINI_FALLTHRU()	fini_fallthru()

#define MD_SECTION_PROLOGUE(sect, entry_pt)		    \
		__asm (					    \
		".section "#sect",\"ax\",@progbits	\n" \
		#entry_pt":				\n" \
		"	sts.l	pr, @-r15		\n" \
		"	.align	2			\n" \
		"	/* fall thru */			\n" \
		".previous")

#define MD_SECTION_EPILOGUE(sect)			    \
		__asm (					    \
		".section "#sect",\"ax\",@progbits	\n" \
		"	lds.l	@r15+, pr		\n" \
		"	rts				\n" \
		"	nop				\n" \
		".previous")

#ifdef __LEADING_UNDERSCORE
#define MD_INIT_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.init, _init_fallthru)
#define MD_FINI_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.fini, _fini_fallthru)
#else
#define MD_INIT_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.init, init_fallthru)
#define MD_FINI_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.fini, fini_fallthru)
#endif

#define MD_INIT_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.init)
#define MD_FINI_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.fini)

/*
 * We need to put the function pointer in our own constant
 * pool (otherwise it might be too far away to reference).
 */
#define MD_CALL_STATIC_FUNCTION(section, func) \
asm(".section " #section "\n"		\
"    mov.l 1f, r1	\n"		\
"    mova 2f, r0	\n"		\
"    braf r1		\n"		\
"     lds r0, pr	\n"		\
"0:  .p2align 2		\n"		\
"1:  .long " #func " - 0b \n"		\
"2:  .previous");