srt0.S revision 1.1.4.2
1 1.1.4.2 rmind /* $NetBSD: srt0.S,v 1.1.4.2 2014/05/18 17:45:11 rmind Exp $ */ 2 1.1.4.2 rmind 3 1.1.4.2 rmind /* $OpenBSD: srt0.S,v 1.7 2001/05/16 23:57:35 mickey Exp $ */ 4 1.1.4.2 rmind 5 1.1.4.2 rmind /* 6 1.1.4.2 rmind * Copyright (c) 1998-2004 Michael Shalayeff 7 1.1.4.2 rmind * All rights reserved. 8 1.1.4.2 rmind * 9 1.1.4.2 rmind * Redistribution and use in source and binary forms, with or without 10 1.1.4.2 rmind * modification, are permitted provided that the following conditions 11 1.1.4.2 rmind * are met: 12 1.1.4.2 rmind * 1. Redistributions of source code must retain the above copyright 13 1.1.4.2 rmind * notice, this list of conditions and the following disclaimer. 14 1.1.4.2 rmind * 2. Redistributions in binary form must reproduce the above copyright 15 1.1.4.2 rmind * notice, this list of conditions and the following disclaimer in the 16 1.1.4.2 rmind * documentation and/or other materials provided with the distribution. 17 1.1.4.2 rmind * 18 1.1.4.2 rmind * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 1.1.4.2 rmind * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 1.1.4.2 rmind * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 1.1.4.2 rmind * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 22 1.1.4.2 rmind * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 1.1.4.2 rmind * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 1.1.4.2 rmind * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 1.1.4.2 rmind * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 1.1.4.2 rmind * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 1.1.4.2 rmind * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 1.1.4.2 rmind * THE POSSIBILITY OF SUCH DAMAGE. 29 1.1.4.2 rmind */ 30 1.1.4.2 rmind /* 31 1.1.4.2 rmind * Copyright 1996 1995 by Open Software Foundation, Inc. 32 1.1.4.2 rmind * All Rights Reserved 33 1.1.4.2 rmind * 34 1.1.4.2 rmind * Permission to use, copy, modify, and distribute this software and 35 1.1.4.2 rmind * its documentation for any purpose and without fee is hereby granted, 36 1.1.4.2 rmind * provided that the above copyright notice appears in all copies and 37 1.1.4.2 rmind * that both the copyright notice and this permission notice appear in 38 1.1.4.2 rmind * supporting documentation. 39 1.1.4.2 rmind * 40 1.1.4.2 rmind * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 41 1.1.4.2 rmind * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 42 1.1.4.2 rmind * FOR A PARTICULAR PURPOSE. 43 1.1.4.2 rmind * 44 1.1.4.2 rmind * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 45 1.1.4.2 rmind * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 46 1.1.4.2 rmind * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 47 1.1.4.2 rmind * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 48 1.1.4.2 rmind * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 49 1.1.4.2 rmind * 50 1.1.4.2 rmind */ 51 1.1.4.2 rmind ; 52 1.1.4.2 rmind ; Copyright (c) 1990 mt Xinu, Inc. All rights reserved. 53 1.1.4.2 rmind ; Copyright (c) 1990 University of Utah. All rights reserved. 54 1.1.4.2 rmind ; 55 1.1.4.2 rmind ; This file may be freely distributed in any form as long as 56 1.1.4.2 rmind ; this copyright notice is included. 57 1.1.4.2 rmind ; THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 58 1.1.4.2 rmind ; IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 59 1.1.4.2 rmind ; WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 60 1.1.4.2 rmind ; 61 1.1.4.2 rmind ; Utah $Hdr: srt0.c 1.3 94/12/13$ 62 1.1.4.2 rmind ; 63 1.1.4.2 rmind 64 1.1.4.2 rmind #define _LOCORE 65 1.1.4.2 rmind #include <machine/iomod.h> 66 1.1.4.2 rmind #include <machine/asm.h> 67 1.1.4.2 rmind 68 1.1.4.2 rmind /* 69 1.1.4.2 rmind * This is the ending of the begin 70 1.1.4.2 rmind */ 71 1.1.4.2 rmind ENTRY(begin,0) 72 1.1.4.2 rmind 73 1.1.4.2 rmind blr %r0,%r5 ; Get address of 'boff' into 'r5', 74 1.1.4.2 rmind ldo begin-boff(%r5),%r5 ; and subtract to get 'begin'. 75 1.1.4.2 rmind boff: 76 1.1.4.2 rmind ldil L%RELOC,%r4 77 1.1.4.2 rmind ldo R%RELOC(%r4),%r4 78 1.1.4.2 rmind ldo start-begin(%r4),%rp 79 1.1.4.2 rmind ldil L%edata,%r3 80 1.1.4.2 rmind ldo R%edata(%r3),%r3 ; Get address of edata. 81 1.1.4.2 rmind ldil L%begin,%r1 82 1.1.4.2 rmind ldo R%begin(%r1),%r1 ; Get address of begin 83 1.1.4.2 rmind sub %r3,%r1,%r3 ; Subtract to get # of bytes to copy 84 1.1.4.2 rmind copyloop: ; do 85 1.1.4.2 rmind ldwm 4(%r5),%r1 ; *r4++ = *r5++; 86 1.1.4.2 rmind addib,>= -4,%r3,copyloop ; while (--r3 >= 0); 87 1.1.4.2 rmind stwm %r1,4(%r4) 88 1.1.4.2 rmind 89 1.1.4.2 rmind ; here we zero the .bss 90 1.1.4.2 rmind ldil L%__bss_start, %r4 91 1.1.4.2 rmind ldo R%__bss_start(%r4), %r4 92 1.1.4.2 rmind ldil L%__bss_end, %r3 93 1.1.4.2 rmind ldo R%__bss_end(%r3), %r3 94 1.1.4.2 rmind zeroloop: 95 1.1.4.2 rmind combf,<,n %r3,%r4, zeroloop ; while (r4 < r3); 96 1.1.4.2 rmind stwm %r0,4(%r4) ; *r4++ = 0; 97 1.1.4.2 rmind 98 1.1.4.2 rmind ldil L%$global$,%dp 99 1.1.4.2 rmind ldo R%$global$(%dp),%dp 100 1.1.4.2 rmind ldil L%start,%r1 101 1.1.4.2 rmind ldo R%start(%r1),%r1 102 1.1.4.2 rmind sub %dp,%r1,%dp ; Subtract to get difference 103 1.1.4.2 rmind add %rp,%dp,%dp ; and relocate it. 104 1.1.4.2 rmind 105 1.1.4.2 rmind ; 106 1.1.4.2 rmind ; We have relocated ourself to RELOC. If we are running on a machine 107 1.1.4.2 rmind ; with separate instruction and data caches, we must flush our data 108 1.1.4.2 rmind ; cache before trying to execute the code starting at rp. 109 1.1.4.2 rmind ; 110 1.1.4.2 rmind ldil L%RELOC,%r22 ; Set %t1 to start of relocated code. 111 1.1.4.2 rmind ldo R%RELOC(%r22),%r22 112 1.1.4.2 rmind ldil L%edata,%r21 ; Set r21 to address of edata 113 1.1.4.2 rmind ldo R%edata(%r21),%r21 114 1.1.4.2 rmind ldil L%begin,%r1 ; set %r1 to address of begin 115 1.1.4.2 rmind ldo R%begin(%r1),%r1 116 1.1.4.2 rmind sub %r21,%r1,%r21 ; Subtract to get length 117 1.1.4.2 rmind mtsp %r0,%sr0 ; Set sr0 to kernel space. 118 1.1.4.2 rmind ldo -1(%r21),%r21 119 1.1.4.2 rmind fdc %r21(0,%r22) 120 1.1.4.2 rmind loop: addib,>,n -16,%r21,loop ; Decrement by cache line size (16). 121 1.1.4.2 rmind fdc %r21(%sr0,%r22) 122 1.1.4.2 rmind fdc 0(%sr0,%r22) ; Flush first word at addr to handle 123 1.1.4.2 rmind sync ; arbitrary cache line boundary. 124 1.1.4.2 rmind nop ; Prevent prefetching. 125 1.1.4.2 rmind nop 126 1.1.4.2 rmind nop 127 1.1.4.2 rmind nop 128 1.1.4.2 rmind nop 129 1.1.4.2 rmind nop 130 1.1.4.2 rmind nop 131 1.1.4.2 rmind bv 0(%rp) 132 1.1.4.2 rmind nop 133 1.1.4.2 rmind EXIT(begin) /* jump to relocated code */ 134 1.1.4.2 rmind 135 1.1.4.2 rmind start: 136 1.1.4.2 rmind ldil L%HEAP_LIMIT, %sp 137 1.1.4.2 rmind ldo R%HEAP_LIMIT(%sp), %sp 138 1.1.4.2 rmind 139 1.1.4.2 rmind b boot ; Call boot(), 140 1.1.4.2 rmind copy %r0, %arg0 ; use default boot device 141 1.1.4.2 rmind nop 142 1.1.4.2 rmind 143 1.1.4.2 rmind /* 144 1.1.4.2 rmind * rtt - restart the box 145 1.1.4.2 rmind */ 146 1.1.4.2 rmind LEAF_ENTRY(_rtt) 147 1.1.4.2 rmind ldil L%LBCAST_ADDR, %r25 148 1.1.4.2 rmind ldi CMD_RESET, %r26 149 1.1.4.2 rmind stw %r26,R%iomod_command(%r25) 150 1.1.4.2 rmind forever: ; Loop until bus reset takes effect. 151 1.1.4.2 rmind b,n forever 152 1.1.4.2 rmind 153 1.1.4.2 rmind bv 0(%rp) 154 1.1.4.2 rmind ldo -48(%sp),%sp 155 1.1.4.2 rmind EXIT(_rtt) 156 1.1.4.2 rmind 157 1.1.4.2 rmind .end 158
Indexes created Mon Oct 20 20:10:13 GMT 2025