Palacios Public Git Repository

To checkout Palacios execute

  git clone http://v3vee.org/palacios/palacios.web/palacios.git
This will give you the master branch. You probably want the devel branch or one of the release branches. To switch to the devel branch, simply execute
  cd palacios
  git checkout --track -b devel origin/devel
The other branches are similar.


721f2f499e10576dcbca1f39d9c0aa2bbb4f9bb4
[palacios.git] / palacios / src / devices / ata.h
1 /* 
2  * This file is part of the Palacios Virtual Machine Monitor developed
3  * by the V3VEE Project with funding from the United States National 
4  * Science Foundation and the Department of Energy.  
5  *
6  * The V3VEE Project is a joint project between Northwestern University
7  * and the University of New Mexico.  You can find out more at 
8  * http://www.v3vee.org
9  *
10  * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> 
11  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org> 
12  * All rights reserved.
13  *
14  * Author: Jack Lange <jarusl@cs.northwestern.edu>
15  *
16  * This is free software.  You are permitted to use,
17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
18  */
19
20 #define MAX_MULT_SECTORS  255
21
22
23 static void ata_identify_device(struct ide_drive * drive) {
24     struct ide_drive_id * drive_id = (struct ide_drive_id *)(drive->data_buf);
25     const char* serial_number = " VT00001\0\0\0\0\0\0\0\0\0\0\0\0";
26     const char* firmware = "ALPHA1  ";
27
28     drive->transfer_length = 512;
29     drive->transfer_index = 0;
30
31
32     memset(drive_id->buf, 0, sizeof(drive_id->buf));
33
34     drive_id->fixed_drive = 1;
35     drive_id->removable_media = 0;
36
37     // Black magic...
38     drive_id->disk_speed1 = 1;
39     drive_id->disk_speed3 = 1;
40
41     drive_id->cdrom_flag = 0;
42
43     // Make it the simplest drive possible (1 head, 1 cyl, 1 sect/track)
44     drive_id->num_cylinders = drive->num_cylinders;
45     drive_id->num_heads = drive->num_heads;
46     drive_id->bytes_per_track = drive->num_sectors * IDE_SECTOR_SIZE;
47     drive_id->bytes_per_sector = IDE_SECTOR_SIZE;
48     drive_id->sectors_per_track = drive->num_sectors;
49
50
51     // These buffers do not contain a terminating "\0"
52     memcpy(drive_id->serial_num, serial_number, strlen(serial_number));
53     memcpy(drive_id->firmware_rev, firmware, strlen(firmware));
54     memcpy(drive_id->model_num, drive->model, 40);
55
56     // 32 bits access
57     drive_id->dword_io = 1;
58
59
60     // enable DMA access
61     drive_id->dma_enable = 1;
62
63     // enable LBA access
64     drive_id->lba_enable = 1;
65     
66     // Drive Capacity (28 bit LBA)
67     drive_id->lba_capacity = drive->hd_ops->get_capacity(drive->private_data);
68     
69     // Drive Capacity (48 bit LBA)
70     drive_id->lba_capacity_2 = drive->hd_ops->get_capacity(drive->private_data);
71
72
73     // lower byte is the maximum multiple sector size...
74     drive_id->rw_multiples = 0x8000 | MAX_MULT_SECTORS;
75
76
77
78     // words 64-70, 54-58 valid
79     drive_id->field_valid = 0x0007; // DMA + pkg cmd valid
80
81
82     // copied from CFA540A
83     // drive_id->buf[63] = 0x0103; // variable (DMA stuff)
84     //drive_id->buf[63] = 0x0000; // variable (DMA stuff)
85     drive_id->buf[63] = 0x0007;
86
87     
88     //    drive_id->buf[64] = 0x0001; // PIO
89     drive_id->buf[65] = 0x00b4;
90     drive_id->buf[66] = 0x00b4;
91     drive_id->buf[67] = 0x012c;
92     drive_id->buf[68] = 0x00b4;
93
94     drive_id->buf[71] = 30; // faked
95     drive_id->buf[72] = 30; // faked
96
97     //    drive_id->buf[80] = 0x1e; // supports up to ATA/ATAPI-4
98     drive_id->major_rev_num = 0x0040; // supports up to ATA/ATAPI-6
99
100
101     drive_id->buf[83] |= 0x0400; // supports 48 bit LBA
102
103
104     drive_id->dma_ultra = 0x2020; // Ultra_DMA_Mode_5_Selected | Ultra_DMA_Mode_5_Supported;
105
106 }
107
108
109 static int ata_read(struct vm_device * dev, struct ide_channel * channel, uint8_t * dst, uint_t sect_cnt) {
110     struct ide_drive * drive = get_selected_drive(channel);
111
112     if (drive->hd_state.accessed == 0) {
113         drive->current_lba = 0;
114         drive->hd_state.accessed = 1;
115     }
116
117     PrintDebug("Reading Drive LBA=%d (count=%d)\n", (uint32_t)(drive->current_lba), sect_cnt);
118
119     int ret = drive->hd_ops->read(dst, sect_cnt, drive->current_lba, drive->private_data);
120     
121     if (ret == -1) {
122         PrintError("IDE: Error reading HD block (LBA=%p)\n", (void *)(addr_t)(drive->current_lba));
123         return -1;
124     }
125
126     return 0;
127 }
128
129
130
131
132 static int ata_get_lba(struct vm_device * dev, struct ide_channel * channel, uint64_t * lba) {
133     struct ide_drive * drive = get_selected_drive(channel);
134     // The if the sector count == 0 then read 256 sectors (cast up to handle that value)
135     uint32_t sect_cnt = (drive->sector_count == 0) ? 256 : drive->sector_count;
136
137     union {
138         uint32_t addr;
139         uint8_t buf[4];
140     } __attribute__((packed)) lba_addr;
141
142     /* LBA addr bits:
143        0-8: sector number reg  (drive->lba0)
144        8-16: low cylinder reg (drive->lba1)
145        16-24: high cylinder reg (drive->lba2)
146        24-28:  low 4 bits of drive_head reg (channel->drive_head.head_num)
147      */
148
149     lba_addr.buf[0] = drive->lba0;
150     lba_addr.buf[1] = drive->lba1;
151     lba_addr.buf[2] = drive->lba2;
152     lba_addr.buf[3] = channel->drive_head.lba3;
153
154
155     if (lba_addr.addr + (sect_cnt * IDE_SECTOR_SIZE) > 
156         drive->hd_ops->get_capacity(drive->private_data)) {
157         PrintError("IDE: request size exceeds disk capacity (lba=%d) (sect_cnt=%d) (ReadEnd=%d) (capacity=%p)\n", 
158                    lba_addr.addr, sect_cnt, 
159                    lba_addr.addr + (sect_cnt * IDE_SECTOR_SIZE),
160                    (void *)(addr_t)(drive->hd_ops->get_capacity(drive->private_data)));
161         return -1;
162     }
163
164     *lba = lba_addr.addr;
165     return 0;
166 }
167
168
169 // 28 bit LBA
170 static int ata_read_sectors(struct vm_device * dev, struct ide_channel * channel) {
171     struct ide_drive * drive = get_selected_drive(channel);
172     // The if the sector count == 0 then read 256 sectors (cast up to handle that value)
173     uint32_t sect_cnt = (drive->sector_count == 0) ? 256 : drive->sector_count;
174
175     if (ata_get_lba(dev, channel, &(drive->current_lba)) == -1) {
176         ide_abort_command(dev, channel);
177         return 0;
178     }
179
180     
181     if (ata_read(dev, channel, drive->data_buf, 1) == -1) {
182         PrintError("Could not read disk sector\n");
183         return -1;
184     }
185
186     drive->transfer_length = sect_cnt * IDE_SECTOR_SIZE;
187     drive->transfer_index = 0;
188
189     channel->status.busy = 0;
190     channel->status.ready = 0;
191     channel->status.write_fault = 0;
192     channel->status.data_req = 1;
193     channel->status.error = 0;
194
195     drive->irq_flags.io_dir = 1;
196     drive->irq_flags.c_d = 0;
197     drive->irq_flags.rel = 0;
198
199
200     ide_raise_irq(dev, channel);
201
202     PrintDebug("Returning from read sectors\n");
203
204     return 0;
205 }
206
207
208 // 48 bit LBA
209 static int ata_read_sectors_ext(struct vm_device * dev, struct ide_channel * channel) {
210     //struct ide_drive * drive = get_selected_drive(channel);
211     // The if the sector count == 0 then read 256 sectors (cast up to handle that value)
212     //uint32_t sector_count = (drive->sector_count == 0) ? 256 : drive->sector_count;
213
214     PrintError("Extended Sector read not implemented\n");
215
216     return -1;
217 }