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.


IDE hard drive works past grub
[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
21 static void ata_identify_device(struct ide_drive * drive) {
22     struct ide_drive_id * drive_id = (struct ide_drive_id *)(drive->data_buf);
23     const char* serial_number = " VT00001\0\0\0\0\0\0\0\0\0\0\0\0";
24     const char* firmware = "ALPHA1  ";
25
26     drive->transfer_length = 512;
27     drive->transfer_index = 0;
28
29
30     memset(drive_id->buf, 0, sizeof(drive_id->buf));
31
32     drive_id->fixed_drive = 1;
33     drive_id->removable_media = 0;
34
35     // Black magic...
36     drive_id->disk_speed1 = 1;
37     drive_id->disk_speed3 = 1;
38
39     drive_id->cdrom_flag = 0;
40
41     // Make it the simplest drive possible (1 head, 1 cyl, 1 sect/track)
42     drive_id->num_cylinders = 1;
43     drive_id->num_heads = 1;
44     drive_id->bytes_per_track = IDE_SECTOR_SIZE;
45     drive_id->bytes_per_sector = IDE_SECTOR_SIZE;
46     drive_id->sectors_per_track = 1;
47
48
49     // These buffers do not contain a terminating "\0"
50     memcpy(drive_id->serial_num, serial_number, strlen(serial_number));
51     memcpy(drive_id->firmware_rev, firmware, strlen(firmware));
52     memcpy(drive_id->model_num, drive->model, 40);
53
54     // 32 bits access
55     drive_id->dword_io = 1;
56
57     // enable DMA access
58     drive_id->dma_enable = 1;
59
60     // enable LBA access
61     drive_id->lba_enable = 1;
62     
63     // Drive Capacity (28 bit LBA)
64     drive_id->lba_capacity = drive->hd_ops->get_capacity(drive->private_data);
65     
66     // Drive Capacity (48 bit LBA)
67     drive_id->lba_capacity_2 = drive->hd_ops->get_capacity(drive->private_data);
68
69     drive_id->rw_multiples = 0x80ff;
70
71     // words 64-70, 54-58 valid
72     drive_id->field_valid = 0x0007; // DMA + pkg cmd valid
73
74     // copied from CFA540A
75     drive_id->buf[63] = 0x0103; // variable (DMA stuff)
76     //drive_id->buf[63] = 0x0000; // variable (DMA stuff)
77     
78     //    drive_id->buf[64] = 0x0001; // PIO
79     drive_id->buf[65] = 0x00b4;
80     drive_id->buf[66] = 0x00b4;
81     drive_id->buf[67] = 0x012c;
82     drive_id->buf[68] = 0x00b4;
83
84     drive_id->buf[71] = 30; // faked
85     drive_id->buf[72] = 30; // faked
86
87     //    drive_id->buf[80] = 0x1e; // supports up to ATA/ATAPI-4
88     drive_id->major_rev_num = 0x0040; // supports up to ATA/ATAPI-6
89
90     drive_id->buf[83] |= 0x0400; // supports 48 bit LBA
91
92
93     drive_id->dma_ultra = 0x2020; // Ultra_DMA_Mode_5_Selected | Ultra_DMA_Mode_5_Supported;
94 }
95
96
97 static int ata_read(struct vm_device * dev, struct ide_channel * channel) {
98     struct ide_drive * drive = get_selected_drive(channel);
99
100     if (drive->hd_state.accessed == 0) {
101         drive->current_lba = 0;
102         drive->hd_state.accessed = 1;
103     }
104
105     int ret = drive->hd_ops->read(drive->data_buf, 1, drive->current_lba, drive->private_data);
106     
107     if (ret == -1) {
108         PrintError("IDE: Error reading HD block (LBA=%p)\n", (void *)(addr_t)(drive->current_lba));
109         return -1;
110     }
111
112     return 0;
113 }
114
115
116
117 // 28 bit LBA
118 static int ata_read_sectors(struct vm_device * dev, struct ide_channel * channel) {
119     struct ide_drive * drive = get_selected_drive(channel);
120     // The if the sector count == 0 then read 256 sectors (cast up to handle that value)
121     uint32_t sect_cnt = (drive->sector_count == 0) ? 256 : drive->sector_count;
122
123     union {
124         uint32_t addr;
125         uint8_t buf[4];
126     } __attribute__((packed)) lba_addr;
127
128     /* LBA addr bits:
129        0-8: sector number reg  (drive->lba0)
130        8-16: low cylinder reg (drive->lba1)
131        16-24: high cylinder reg (drive->lba2)
132        24-28:  low 4 bits of drive_head reg (channel->drive_head.head_num)
133      */
134
135     lba_addr.buf[0] = drive->lba0;
136     lba_addr.buf[1] = drive->lba1;
137     lba_addr.buf[2] = drive->lba2;
138     lba_addr.buf[3] = channel->drive_head.lba3;
139
140     PrintDebug("LBA Address %d\n", drive->lba0);
141     PrintDebug("sector_num %d\n", drive->sector_num);
142
143
144     if (lba_addr.addr + (sect_cnt * IDE_SECTOR_SIZE) > 
145         drive->hd_ops->get_capacity(drive->private_data)) {
146         PrintError("IDE: request size exceeds disk capacity (lba=%d) (sect_cnt=%d) (ReadEnd=%d) (capacity=%p)\n", 
147                    lba_addr.addr, sect_cnt, 
148                    lba_addr.addr + (sect_cnt * IDE_SECTOR_SIZE),
149                    (void *)(addr_t)(drive->hd_ops->get_capacity(drive->private_data)));
150         ide_abort_command(dev, channel);
151         return 0;
152     }
153
154     drive->current_lba = lba_addr.addr;
155     
156     if (ata_read(dev, channel) == -1) {
157         PrintError("Could not read disk sector\n");
158         return -1;
159     }
160
161     drive->transfer_length = sect_cnt * IDE_SECTOR_SIZE;
162     drive->transfer_index = 0;
163
164     channel->status.busy = 0;
165     channel->status.ready = 0;
166     channel->status.write_fault = 0;
167     channel->status.data_req = 1;
168     channel->status.error = 0;
169
170     drive->irq_flags.io_dir = 1;
171     drive->irq_flags.c_d = 0;
172     drive->irq_flags.rel = 0;
173
174
175     ide_raise_irq(dev, channel);
176
177     PrintDebug("Returning from read sectors\n");
178
179     return 0;
180 }
181
182
183 // 48 bit LBA
184 static int ata_read_sectors_ext(struct vm_device * dev, struct ide_channel * channel) {
185     //struct ide_drive * drive = get_selected_drive(channel);
186     // The if the sector count == 0 then read 256 sectors (cast up to handle that value)
187     //uint32_t sector_count = (drive->sector_count == 0) ? 256 : drive->sector_count;
188
189     PrintError("Extended Sector read not implemented\n");
190
191     return -1;
192 }