start.S revision 1.2
1 1.2 onoe /* $NetBSD: start.S,v 1.2 2000/10/12 05:34:29 onoe Exp $ */ 2 1.1 tsubai 3 1.1 tsubai /*- 4 1.1 tsubai * Copyright (C) 1999 Tsubai Masanari. All rights reserved. 5 1.1 tsubai * 6 1.1 tsubai * Redistribution and use in source and binary forms, with or without 7 1.1 tsubai * modification, are permitted provided that the following conditions 8 1.1 tsubai * are met: 9 1.1 tsubai * 1. Redistributions of source code must retain the above copyright 10 1.1 tsubai * notice, this list of conditions and the following disclaimer. 11 1.1 tsubai * 2. Redistributions in binary form must reproduce the above copyright 12 1.1 tsubai * notice, this list of conditions and the following disclaimer in the 13 1.1 tsubai * documentation and/or other materials provided with the distribution. 14 1.1 tsubai * 3. The name of the author may not be used to endorse or promote products 15 1.1 tsubai * derived from this software without specific prior written permission. 16 1.1 tsubai * 17 1.1 tsubai * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 1.1 tsubai * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 1.1 tsubai * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 1.1 tsubai * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 1.1 tsubai * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 1.1 tsubai * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 1.1 tsubai * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 1.1 tsubai * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 1.1 tsubai * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 1.1 tsubai * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 1.1 tsubai */ 28 1.1 tsubai 29 1.1 tsubai #include <mips/asm.h> 30 1.1 tsubai #include <mips/cpuregs.h> 31 1.1 tsubai 32 1.1 tsubai .text 33 1.1 tsubai .align 2 34 1.1 tsubai .set noreorder 35 1.1 tsubai 36 1.1 tsubai .globl _start 37 1.1 tsubai _start: 38 1.1 tsubai b 1f 39 1.1 tsubai nop 40 1.1 tsubai .word 0x19900106 /* version? */ 41 1.1 tsubai .word 0 42 1.1 tsubai 43 1.1 tsubai /* disklabel here */ 44 1.1 tsubai .space 0x1f0 45 1.1 tsubai 46 1.2 onoe 1: bgez a3, 2f /* load address */ 47 1.2 onoe lui v0, 0xa000 /* 0xa0000000 for non-APbus */ 48 1.2 onoe ori v0, 0x1000 /* 0xa0001000 for APbus */ 49 1.2 onoe 2: la v1, _start /* relocate myself */ 50 1.2 onoe la t1, _end 51 1.2 onoe 3: lw t0, 0(v0) 52 1.2 onoe addu v1, 4 53 1.2 onoe sw t0, -4(v1) 54 1.2 onoe bne v1, t1, 3b 55 1.2 onoe addu v0, 4 56 1.2 onoe bgez a3, 4f 57 1.1 tsubai nop 58 1.2 onoe lw t0, 16(sp) 59 1.2 onoe sw t0, _sip 60 1.2 onoe 4: li sp, 0xa0001000 61 1.2 onoe la v0, bootxx 62 1.2 onoe j v0 63 1.1 tsubai nop 64
Indexes created Wed Oct 01 07:09:59 GMT 2025