179 lines
6.4 KiB
ArmAsm
179 lines
6.4 KiB
ArmAsm
/* $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 <mips/asm.h>
|
|
#include <mips/cpuregs.h>
|
|
#include <machine/dec_prom.h>
|
|
|
|
#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)
|