/* $NetBSD: start.S,v 1.2 2000/10/12 05:34:29 onoe Exp $ */ /*- * Copyright (C) 1999 Tsubai Masanari. All rights reserved. * * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include <mips/asm.h> #include <mips/cpuregs.h> .text .align 2 .set noreorder .globl _start _start: b 1f nop .word 0x19900106 /* version? */ .word 0 /* disklabel here */ .space 0x1f0 1: bgez a3, 2f /* load address */ lui v0, 0xa000 /* 0xa0000000 for non-APbus */ ori v0, 0x1000 /* 0xa0001000 for APbus */ 2: la v1, _start /* relocate myself */ la t1, _end 3: lw t0, 0(v0) addu v1, 4 sw t0, -4(v1) bne v1, t1, 3b addu v0, 4 bgez a3, 4f nop lw t0, 16(sp) sw t0, _sip 4: li sp, 0xa0001000 la v0, bootxx j v0 nop |