debuggers.hg

view tools/ioemu/hw/cdrom.c @ 10995:08a11694b109

[qemu] Update ioemu to qemu 0.8.2.

Signed-off-by: Christian Limpach <Christian.Limpach@xensource.com>
author chris@kneesaa.uk.xensource.com
date Mon Aug 07 18:25:30 2006 +0100 (2006-08-07)
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1 /*
2 * QEMU ATAPI CD-ROM Emulator
3 *
4 * Copyright (c) 2006 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
25 /* ??? Most of the ATAPI emulation is still in ide.c. It should be moved
26 here. */
28 #include <vl.h>
30 static void lba_to_msf(uint8_t *buf, int lba)
31 {
32 lba += 150;
33 buf[0] = (lba / 75) / 60;
34 buf[1] = (lba / 75) % 60;
35 buf[2] = lba % 75;
36 }
38 /* same toc as bochs. Return -1 if error or the toc length */
39 /* XXX: check this */
40 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track)
41 {
42 uint8_t *q;
43 int len;
45 if (start_track > 1 && start_track != 0xaa)
46 return -1;
47 q = buf + 2;
48 *q++ = 1; /* first session */
49 *q++ = 1; /* last session */
50 if (start_track <= 1) {
51 *q++ = 0; /* reserved */
52 *q++ = 0x14; /* ADR, control */
53 *q++ = 1; /* track number */
54 *q++ = 0; /* reserved */
55 if (msf) {
56 *q++ = 0; /* reserved */
57 lba_to_msf(q, 0);
58 q += 3;
59 } else {
60 /* sector 0 */
61 cpu_to_be32wu((uint32_t *)q, 0);
62 q += 4;
63 }
64 }
65 /* lead out track */
66 *q++ = 0; /* reserved */
67 *q++ = 0x16; /* ADR, control */
68 *q++ = 0xaa; /* track number */
69 *q++ = 0; /* reserved */
70 if (msf) {
71 *q++ = 0; /* reserved */
72 lba_to_msf(q, nb_sectors);
73 q += 3;
74 } else {
75 cpu_to_be32wu((uint32_t *)q, nb_sectors);
76 q += 4;
77 }
78 len = q - buf;
79 cpu_to_be16wu((uint16_t *)buf, len - 2);
80 return len;
81 }
83 /* mostly same info as PearPc */
84 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num)
85 {
86 uint8_t *q;
87 int len;
89 q = buf + 2;
90 *q++ = 1; /* first session */
91 *q++ = 1; /* last session */
93 *q++ = 1; /* session number */
94 *q++ = 0x14; /* data track */
95 *q++ = 0; /* track number */
96 *q++ = 0xa0; /* lead-in */
97 *q++ = 0; /* min */
98 *q++ = 0; /* sec */
99 *q++ = 0; /* frame */
100 *q++ = 0;
101 *q++ = 1; /* first track */
102 *q++ = 0x00; /* disk type */
103 *q++ = 0x00;
105 *q++ = 1; /* session number */
106 *q++ = 0x14; /* data track */
107 *q++ = 0; /* track number */
108 *q++ = 0xa1;
109 *q++ = 0; /* min */
110 *q++ = 0; /* sec */
111 *q++ = 0; /* frame */
112 *q++ = 0;
113 *q++ = 1; /* last track */
114 *q++ = 0x00;
115 *q++ = 0x00;
117 *q++ = 1; /* session number */
118 *q++ = 0x14; /* data track */
119 *q++ = 0; /* track number */
120 *q++ = 0xa2; /* lead-out */
121 *q++ = 0; /* min */
122 *q++ = 0; /* sec */
123 *q++ = 0; /* frame */
124 if (msf) {
125 *q++ = 0; /* reserved */
126 lba_to_msf(q, nb_sectors);
127 q += 3;
128 } else {
129 cpu_to_be32wu((uint32_t *)q, nb_sectors);
130 q += 4;
131 }
133 *q++ = 1; /* session number */
134 *q++ = 0x14; /* ADR, control */
135 *q++ = 0; /* track number */
136 *q++ = 1; /* point */
137 *q++ = 0; /* min */
138 *q++ = 0; /* sec */
139 *q++ = 0; /* frame */
140 if (msf) {
141 *q++ = 0;
142 lba_to_msf(q, 0);
143 q += 3;
144 } else {
145 *q++ = 0;
146 *q++ = 0;
147 *q++ = 0;
148 *q++ = 0;
149 }
151 len = q - buf;
152 cpu_to_be16wu((uint16_t *)buf, len - 2);
153 return len;
154 }