bootxx.S revision 1.2
1 /* $NetBSD: bootxx.S,v 1.2 2012/01/21 19:44:30 nonaka Exp $ */ 2 3 /*- 4 * Copyright (C) 2005 NONAKA Kimihiro <nonaka (at) netbsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <machine/asm.h> 29 #include <sys/bootblock.h> 30 31 ENTRY(bootxx_start) 32 bra bootxx_start1 33 nop 34 .balign 4 35 ENTRY(bootxx_magic) 36 .long LANDISK_BOOT_MAGIC_1 37 boot_params: 38 .long 1f - boot_params 39 #include <boot_params.S> 40 41 . = bootxx_start + 0x80 42 bootxx_start1: 43 mov.l .L._end, r0 /* zero bss */ 44 mov.l .L.__bss_start, r1 45 sub r1, r0 46 shlr2 r0 /* _end and __bss_start are aligned */ 47 mov #0, r2 48 1: mov.l r2, @r1 49 dt r0 50 bf/s 1b 51 add #4, r1 52 53 mov.l .L.2nd_loadaddr, r15 /* new stack pointer */ 54 mov.l r4, @-r15 55 mov.l .L.boot1, r0 56 jsr @r0 57 mov r15, r4 58 59 tst r0, r0 60 bf/s boot_fail 61 mov.l @r15+, r5 /* pass boot sector to boot */ 62 63 /* flush cache */ 64 mov #0, r4 65 mov #6, r0 66 trapa #0x3f 67 68 mov.l .L.2nd_loadaddr, r0 69 mov.l .L.boot_params, r4 70 jmp @r0 71 nop 72 73 boot_fail: 74 mov r0, r1 75 mova .L.errtxt, r0 76 mov r0, r4 77 mov #32, r0 78 trapa #0x3f 79 mov r1, r4 80 mov #32, r0 81 trapa #0x3f 82 mova .L.crlf, r0 83 mov r0, r4 84 mov #32, r0 85 trapa #0x3f 86 99: bra 99b 87 nop 88 89 90 .align 2 91 .L._end: 92 .long _end 93 .L.__bss_start: 94 .long __bss_start 95 .L.boot1: 96 .long _C_LABEL(boot1) 97 .L.2nd_loadaddr: 98 .long SECONDARY_LOAD_ADDRESS 99 .L.boot_params: 100 .long boot_params 101 102 .align 2 103 .L.errtxt: .asciz "Error: " 104 .align 2 105 .L.crlf: .asciz "\r\n" 106 107 108 /* 109 * Vector the fs calls through here so we can support multiple 110 * file system types with one copy of the library code and 111 * multiple copies of this file. 112 */ 113 ENTRY(xxfs_open) 114 mov.l 1f, r0 115 jmp @r0 116 nop 117 .align 2 118 1: .long _C_LABEL(XXfs_open) 119 120 ENTRY(xxfs_close) 121 mov.l 1f, r0 122 jmp @r0 123 nop 124 .align 2 125 1: .long _C_LABEL(XXfs_close) 126 127 ENTRY(xxfs_read) 128 mov.l 1f, r0 129 jmp @r0 130 nop 131 .align 2 132 1: .long _C_LABEL(XXfs_read) 133 134 ENTRY(xxfs_stat) 135 mov.l 1f, r0 136 jmp @r0 137 nop 138 .align 2 139 1: .long _C_LABEL(XXfs_stat) 140 141 142 143 /* 144 * int readsects(int dev, uint32_t lba, void *buf, size_t size); 145 */ 146 ENTRY(readsects) 147 mov #2, r0 148 trapa #0x3f 149 rts 150 nop 151 argerror: 152 rts 153 mov #-1, r0 154 155 /* 156 * void putstr(const char *str); 157 */ 158 ENTRY(putstr) 159 mov #32, r0 160 trapa #0x3f 161 rts 162 nop 163
Indexes created Fri Oct 03 02:09:57 GMT 2025