127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/* $NetBSD: SRT1.c,v 1.7 1998/02/05 04:57:05 gwr Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/* SRT1.c - Stand-alone Run-time startup code, part 1 */
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#include <sys/types.h>
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#include <machine/mon.h>
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#include "libsa.h"
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#include "dvma.h"
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int _is3x = 0;
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struct sunromvec *_romvec = 0;
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void *chain_to_func = 0;
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/*
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* These are the function pointers for sun3 vs sun3x stuff.
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*/
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char * (*dev_mapin_p) __P((int, u_long, int));
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char * (*dvma_alloc_p) __P((int len));
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void (*dvma_free_p) __P((char *dvma, int len));
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char * (*dvma_mapin_p) __P((char *pkt, int len));
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void (*dvma_mapout_p) __P((char *dmabuf, int len));
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/*
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* This is called by SRT0.S
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* to do final prep for main
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*/
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void
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_start()
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{
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void **vbr;
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int x;
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/*
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* Determine sun3 vs sun3x by looking where the
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* vector base register points. The PROM always
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* points that somewhere into [MONSTART..MONEND]
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* which is a different range on each.
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*/
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vbr = getvbr();
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x = (int)vbr & 0xFFF00000;
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if (x == SUN3X_MONSTART)
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_is3x = 1;
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/* Find the PROM vector. */
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if (_is3x)
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x = SUN3X_PROM_BASE;
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else
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x = SUN3_PROM_BASE;
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_romvec = ((struct sunromvec *) x);
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/* Setup trap 14 for use as a breakpoint. */
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vbr[32+14] = _romvec->abortEntry;
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/* Initialize sun3 vs sun3x function pointers. */
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if (_is3x)
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sun3x_init();
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else
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sun3_init();
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main(0);
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exit();
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}
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void
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breakpoint()
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{
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__asm __volatile ("trap #14");
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}
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void
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chain_to(func)
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void *func;
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{
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/*
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* If set, this pointer is jumped-to by exit
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* after carefully restoring the PROM stack.
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*/
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chain_to_func = func;
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ICIA();
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exit();
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}
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/*
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* Boot programs in C++ ? Not likely!
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*/
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void
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__main() {}
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