/* $NetBSD: start.S,v 1.12 1999/03/29 13:48:25 simonb Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jonathan Stone, Michael Hitch and Simon Burge. * * 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. */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell. * * 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 University of * California, Berkeley and its contributors. * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. * * @(#)start.s 8.2 (Berkeley) 1/21/94 */ /* * start.s - * * Contains code that is the first executed at boot time. * * Copyright (C) 1989 Digital Equipment Corporation. * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby granted, * provided that the above copyright notice appears in all copies. * Digital Equipment Corporation makes no representations about the * suitability of this software for any purpose. It is provided "as is" * without express or implied warranty. * * from: Header: /sprite/src/boot/decprom/ds3100.md/RCS/start.s, * v 1.1 90/02/16 16:19:39 shirriff Exp SPRITE (DECWRL) */ #include #include #include #ifdef BOOTXX /* * Boot block that starts in sector 0 */ Dec_Diskboot: .word 0, 0 /* pad */ .word 0x0002757a /* DEC_BOOT_MAGIC */ .word 0 /* mode = single sequence of blocks */ .word Dec_Diskboot /* loadAddr */ .word start /* execAddr */ .word 16, 0 /* map[0] numBlocks, startBlock */ .word 0,0, 0,0, 0,0, 0,0 .word 0,0, 0,0, 0,0, 0,0 Label_goes_here: .word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 .word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 .word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 .word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 .word 0,0, 0,0, 0 #endif .extern callv, 4 /* * Amount to take off of the stack for the benefit of the debugger. */ #define START_FRAME ((4 * 4) + 4 + 4) .globl start start: .set noreorder #ifdef __GP_SUPPORT__ la gp, _C_LABEL (_gp) #endif la sp, start - START_FRAME sw zero, START_FRAME - 4(sp) # Zero out old ra for debugger sw zero, START_FRAME - 8(sp) # Zero out old fp for debugger move s0, a0 # save argc move s1, a1 # save argv beq a2, DEC_REX_MAGIC, 1f # jump if boot from DS5000 move s3, a3 # BDslot: save call vector la s3, _C_LABEL(callvec) # init call vector 1: la a0, _C_LABEL (edata) # clear BSS move a1, zero la a2, _C_LABEL (end) jal _C_LABEL(memset) # memset(edata, 0, end - edata) subu a2, a2, a0 sw s3, _C_LABEL(callv) # save call vector move a0, s0 # restore argc jal _C_LABEL(main) # main(argc, argv) move a1, s1 # restore argv j _C_LABEL(prom_restart) # restart... nop LEAF(prom_restart) lw v0, _C_LABEL (callv) lw v0, 0x9C(v0) /* halt */ move a0, zero /* Don't print anything. */ j v0 move a1, zero END(prom_restart) LEAF(prom_open) li v0, DEC_PROM_OPEN j v0 nop END(prom_open) LEAF(prom_lseek) li v0, DEC_PROM_LSEEK j v0 nop END(prom_lseek) LEAF(prom_read) li v0, DEC_PROM_READ j v0 nop END(prom_read)