![[BACK]](/icons/back.gif){kind=icon}
Return to xxboot.S CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / arch / landisk / stand / xxboot|
Return to xxboot.S CVS log | Up to [local] / sys / arch / landisk / stand / xxboot |
1.1 nbrk 1: /* $OpenBSD: xxboot.S,v 1.1 2006/11/08 17:46:56 deraadt Exp $ */
2: /* $NetBSD: xxboot.S,v 1.1 2006/09/01 21:26:19 uwe Exp $ */
3:
4: /*-
5: * Copyright (c) 2005 NONAKA Kimihiro
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #include <machine/asm.h>
31:
32: ENTRY(xxboot_start)
33: bra xxboot_start1
34: nop
35: .balign 4
36: ENTRY(xxboot_magic)
37: .long 0x20031125
38: boot_params:
39: .long 1f - boot_params
40:
41: . = xxboot_start + 0x80
42: xxboot_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 LOADADDRESS
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: * int readsects(int dev, uint32_t lba, void *buf, size_t size);
110: */
111: ENTRY(readsects)
112: mov #2, r0
113: trapa #0x3f
114: rts
115: nop
116: argerror:
117: rts
118: mov #-1, r0
119:
120: /*
121: * void putstr(const char *str);
122: */
123: ENTRY(putstr)
124: mov #32, r0
125: trapa #0x3f
126: rts
127: nop
128:
129: /*
130: * void putchar(int c);
131: */
132: ENTRY(putchar)
133: mov #31, r0
134: trapa #0x3f
135: rts
136: nop
137: