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.


updated the pci and IDE configuration.
[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 = 1;
45     drive_id->num_heads = 1;
46     drive_id->bytes_per_track = IDE_SECTOR_SIZE;
47     drive_id->bytes_per_sector = IDE_SECTOR_SIZE;
48     drive_id->sectors_per_track = 1;
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     int ret = drive->hd_ops->read(dst, sect_cnt, drive->current_lba, drive->private_data);
118     
119     if (ret == -1) {
120         PrintError("IDE: Error reading HD block (LBA=%p)\n", (void *)(addr_t)(drive->current_lba));
121         return -1;
122     }
123
124     return 0;
125 }
126
127
128
129 // 28 bit LBA
130 static int ata_read_sectors(struct vm_device * dev, struct ide_channel * channel) {
131     struct ide_drive * drive = get_selected_drive(channel);
132     // The if the sector count == 0 then read 256 sectors (cast up to handle that value)
133     uint32_t sect_cnt = (drive->sector_count == 0) ? 256 : drive->sector_count;
134
135     union {
136         uint32_t addr;
137         uint8_t buf[4];
138     } __attribute__((packed)) lba_addr;
139
140     /* LBA addr bits:
141        0-8: sector number reg  (drive->lba0)
142        8-16: low cylinder reg (drive->lba1)
143        16-24: high cylinder reg (drive->lba2)
144        24-28:  low 4 bits of drive_head reg (channel->drive_head.head_num)
145      */
146
147     lba_addr.buf[0] = drive->lba0;
148     lba_addr.buf[1] = drive->lba1;
149     lba_addr.buf[2] = drive->lba2;
150     lba_addr.buf[3] = channel->drive_head.lba3;
151
152
153     if (lba_addr.addr + (sect_cnt * IDE_SECTOR_SIZE) > 
154         drive->hd_ops->get_capacity(drive->private_data)) {
155         PrintError("IDE: request size exceeds disk capacity (lba=%d) (sect_cnt=%d) (ReadEnd=%d) (capacity=%p)\n", 
156                    lba_addr.addr, sect_cnt, 
157                    lba_addr.addr + (sect_cnt * IDE_SECTOR_SIZE),
158                    (void *)(addr_t)(drive->hd_ops->get_capacity(drive->private_data)));
159         ide_abort_command(dev, channel);
160         return 0;
161     }
162
163     drive->current_lba = lba_addr.addr;
164     
165     if (ata_read(dev, channel, drive->data_buf, 1) == -1) {
166         PrintError("Could not read disk sector\n");
167         return -1;
168     }
169
170     drive->transfer_length = sect_cnt * IDE_SECTOR_SIZE;
171     drive->transfer_index = 0;
172
173     channel->status.busy = 0;
174     channel->status.ready = 0;
175     channel->status.write_fault = 0;
176     channel->status.data_req = 1;
177     channel->status.error = 0;
178
179     drive->irq_flags.io_dir = 1;
180     drive->irq_flags.c_d = 0;
181     drive->irq_flags.rel = 0;
182
183
184     ide_raise_irq(dev, channel);
185
186     PrintDebug("Returning from read sectors\n");
187
188     return 0;
189 }
190
191
192 // 48 bit LBA
193 static int ata_read_sectors_ext(struct vm_device * dev, struct ide_channel * channel) {
194     //struct ide_drive * drive = get_selected_drive(channel);
195     // The if the sector count == 0 then read 256 sectors (cast up to handle that value)
196     //uint32_t sector_count = (drive->sector_count == 0) ? 256 : drive->sector_count;
197
198     PrintError("Extended Sector read not implemented\n");
199
200     return -1;
201 }