1 /* $NetBSD: SRT1.c,v 1.1 2001/06/14 12:57:13 fredette Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* SRT1.c - Stand-alone Run-time startup code, part 1 */ 40 41 #include <sys/types.h> 42 #include <machine/mon.h> 43 44 #include "libsa.h" 45 #include "dvma.h" 46 47 int _is2 = 0; 48 int _is3x = 0; 49 struct sunromvec *_romvec = 0; 50 void *chain_to_func = 0; 51 52 /* 53 * These are the function pointers for sun2 vs sun3 vs sun3x stuff. 54 */ 55 char * (*dev_mapin_p) __P((int, u_long, int)); 56 char * (*dvma_alloc_p) __P((int len)); 57 void (*dvma_free_p) __P((char *dvma, int len)); 58 char * (*dvma_mapin_p) __P((char *pkt, int len)); 59 void (*dvma_mapout_p) __P((char *dmabuf, int len)); 60 61 /* 62 * This is called by SRT0.S 63 * to do final prep for main 64 */ 65 void 66 _start() 67 { 68 void **vbr; 69 int x; 70 71 /* 72 * Determine sun2 vs sun3 vs sun3x by looking where the 73 * vector base register points. The PROM always 74 * points that somewhere into [MONSTART..MONEND] 75 * which is a different range on each. 76 */ 77 78 vbr = getvbr(); 79 x = (int)vbr & 0xFFF00000; 80 if (x == SUN3X_MONSTART) 81 _is3x = 1; 82 else if (x == 0) 83 _is2 = 1; 84 85 /* Find the PROM vector. */ 86 if (_is3x) 87 x = SUN3X_PROM_BASE; 88 else if (_is2) 89 x = SUN2_PROM_BASE; 90 else 91 x = SUN3_PROM_BASE; 92 _romvec = ((struct sunromvec *) x); 93 94 /* Setup trap 14 for use as a breakpoint. */ 95 vbr[32+14] = _romvec->abortEntry; 96 97 /* Initialize sun3 vs sun3x function pointers. */ 98 if (_is3x) 99 sun3x_init(); 100 else if (_is2) 101 sun2_init(); 102 else 103 sun3_init(); 104 105 main(0); 106 exit(); 107 } 108 109 void 110 breakpoint() 111 { 112 __asm __volatile ("trap #14"); 113 } 114 115 void 116 chain_to(func) 117 void *func; 118 { 119 120 /* 121 * If set, this pointer is jumped-to by exit 122 * after carefully restoring the PROM stack. 123 */ 124 chain_to_func = func; 125 ICIA(); 126 exit(); 127 } 128 129 /* 130 * Boot programs in C++ ? Not likely! 131 */ 132 void 133 __main() {} 134