bootxx.S revision 1.1
1 /* $NetBSD: bootxx.S,v 1.1 2006/09/01 21:26:19 uwe Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 NONAKA Kimihiro 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 REGENTS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <machine/asm.h> 30 #include <sys/bootblock.h> 31 32 ENTRY(bootxx_start) 33 bra bootxx_start1 34 nop 35 .balign 4 36 ENTRY(bootxx_magic) 37 .long LANDISK_BOOT_MAGIC_1 38 boot_params: 39 .long 1f - boot_params 40 #include <boot_params.S> 41 42 . = bootxx_start + 0x80 43 bootxx_start1: 44 mov.l .L._end, r0 /* zero bss */ 45 mov.l .L.__bss_start, r1 46 sub r1, r0 47 shlr2 r0 /* _end and __bss_start are aligned */ 48 mov #0, r2 49 1: mov.l r2, @r1 50 dt r0 51 bf/s 1b 52 add #4, r1 53 54 mov.l .L.2nd_loadaddr, r15 /* new stack pointer */ 55 mov.l r4, @-r15 56 mov.l .L.boot1, r0 57 jsr @r0 58 mov r15, r4 59 60 tst r0, r0 61 bf/s boot_fail 62 mov.l @r15+, r5 /* pass boot sector to boot */ 63 64 /* flush cache */ 65 mov #0, r4 66 mov #6, r0 67 trapa #0x3f 68 69 mov.l .L.2nd_loadaddr, r0 70 mov.l .L.boot_params, r4 71 jmp @r0 72 nop 73 74 boot_fail: 75 mov r0, r1 76 mova .L.errtxt, r0 77 mov r0, r4 78 mov #32, r0 79 trapa #0x3f 80 mov r1, r4 81 mov #32, r0 82 trapa #0x3f 83 mova .L.crlf, r0 84 mov r0, r4 85 mov #32, r0 86 trapa #0x3f 87 99: bra 99b 88 nop 89 90 91 .align 2 92 .L._end: 93 .long _end 94 .L.__bss_start: 95 .long __bss_start 96 .L.boot1: 97 .long _C_LABEL(boot1) 98 .L.2nd_loadaddr: 99 .long SECONDARY_LOAD_ADDRESS 100 .L.boot_params: 101 .long boot_params 102 103 .align 2 104 .L.errtxt: .asciz "Error: " 105 .align 2 106 .L.crlf: .asciz "\r\n" 107 108 109 /* 110 * Vector the fs calls through here so we can support multiple 111 * file system types with one copy of the library code and 112 * multiple copies of this file. 113 */ 114 ENTRY(xxfs_open) 115 mov.l 1f, r0 116 jmp @r0 117 nop 118 .align 2 119 1: .long _C_LABEL(XXfs_open) 120 121 ENTRY(xxfs_close) 122 mov.l 1f, r0 123 jmp @r0 124 nop 125 .align 2 126 1: .long _C_LABEL(XXfs_close) 127 128 ENTRY(xxfs_read) 129 mov.l 1f, r0 130 jmp @r0 131 nop 132 .align 2 133 1: .long _C_LABEL(XXfs_read) 134 135 ENTRY(xxfs_stat) 136 mov.l 1f, r0 137 jmp @r0 138 nop 139 .align 2 140 1: .long _C_LABEL(XXfs_stat) 141 142 143 144 /* 145 * int readsects(int dev, uint32_t lba, void *buf, size_t size); 146 */ 147 ENTRY(readsects) 148 mov #2, r0 149 trapa #0x3f 150 rts 151 nop 152 argerror: 153 rts 154 mov #-1, r0 155 156 /* 157 * void putstr(const char *str); 158 */ 159 ENTRY(putstr) 160 mov #32, r0 161 trapa #0x3f 162 rts 163 nop 164
Indexes created Fri Oct 03 02:09:57 GMT 2025