64 lines
2.0 KiB
ArmAsm
64 lines
2.0 KiB
ArmAsm
/* $NetBSD: start.S,v 1.2 2000/10/12 05:34:29 onoe Exp $ */
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/*-
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* Copyright (C) 1999 Tsubai Masanari. All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <mips/asm.h>
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#include <mips/cpuregs.h>
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.text
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.align 2
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.set noreorder
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.globl _start
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_start:
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b 1f
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nop
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.word 0x19900106 /* version? */
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.word 0
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/* disklabel here */
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.space 0x1f0
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1: bgez a3, 2f /* load address */
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lui v0, 0xa000 /* 0xa0000000 for non-APbus */
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ori v0, 0x1000 /* 0xa0001000 for APbus */
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2: la v1, _start /* relocate myself */
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la t1, _end
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3: lw t0, 0(v0)
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addu v1, 4
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sw t0, -4(v1)
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bne v1, t1, 3b
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addu v0, 4
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bgez a3, 4f
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nop
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lw t0, 16(sp)
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sw t0, _sip
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4: li sp, 0xa0001000
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la v0, bootxx
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j v0
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nop
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