sim/ppc/hw_disk.c

43    disk - mass storage device
51    Mass storage devices such as a hard-disk or cdrom-drive are not
57    a <<cdrom>>, <<disk>> or <<floppy>> are created as children of of a
67    interpreted as an offset from the start of the disk.
70    disk that provides access to any of the physical media, a disk
71    partition, or even a file within a partition.  The <<disk-label>>
89    The name of the file that contains an image of the disk.  For
90    <<disk>> and <<floppy>> devices, the image will be opened for both
116    If this property is present, the disk file image is always opened
124    | $  psim -t 'disk-device' \
127    Add a CDROM and disk to an IDE bus.  Specify the host operating
130    |    -o '/pci/ide/disk@0/file "disk-image' \
150    |    device_create_instance(root, "/pci/ide/disk:,\netbsd.elf");
164    interface) depends on the implementation of <<disk-label>> package.
167    The disk does not know its size.  Hence it relies on the failure of
170    The disk size is limited by the addressable range covered by
174    The method #blocks should `stat' the disk to determine the number
193   hw_disk_device *disk;
199 		hw_disk_device *disk,
202   if (disk->image != NULL)
203     fclose(disk->image);
204   if (disk->name != NULL)
205     free(disk->name);
206   disk->name = strdup(name);
207   disk->image = fopen(disk->name, disk->read_only ? "r" : "r+");
208   if (disk->image == NULL) {
210     device_error(me, "open %s failed\n", disk->name);
213   DTRACE(disk, ("image %s (%s)\n",
214                 disk->name,
215                 (disk->read_only ? "read-only" : "read-write")));
221   hw_disk_device *disk = device_data(me);
234   /* Tell the world we are a disk.  */
237   /* get the name of the file specifying the disk image */
238   disk->name_index = 0;
239   disk->nr_names = device_find_string_array_property(me, "file",
240 						     disk->name_index, &name);
241   if (!disk->nr_names)
245   disk->read_only =
246     (strcmp(device_name(me), "disk") != 0
251   open_disk_image(me, disk, name);
264       hw_disk_device *disk = device_data(me);
267 	disk->name_index = -1;
270 	disk->name_index = (disk->name_index + 1) % disk->nr_names;
272 					       disk->name_index, &name))
275       open_disk_image(me, disk, name);
298   hw_disk_device *disk = device_data(me);
301     device_error(me, "read - extended disk addressing unimplemented");
304   else if (fseek(disk->image, addr, SEEK_SET) < 0)
306   else if (fread(dest, nr_bytes, 1, disk->image) != 1)
310   DTRACE(disk, ("io-read - address 0x%lx, nr-bytes-read %d, requested %d\n",
325   hw_disk_device *disk = device_data(me);
328     device_error(me, "write - extended disk addressing unimplemented");
329   if (disk->read_only)
333   else if (fseek(disk->image, addr, SEEK_SET) < 0)
335   else if (fwrite(source, nr_bytes, 1, disk->image) != 1)
339   DTRACE(disk, ("io-write - address 0x%lx, nr-bytes-written %d, requested %d\n",
351   DITRACE(disk, ("delete - instance=%ld\n",
362   DITRACE(disk, ("read - instance=%ld len=%ld\n",
367   if (fseek(data->disk->image, data->pos, SEEK_SET) < 0)
369   if (fread(buf, len, 1, data->disk->image) != 1)
371   data->pos = ftell(data->disk->image);
381   DITRACE(disk, ("write - instance=%ld len=%ld\n",
386   if (data->disk->read_only)
388   if (fseek(data->disk->image, data->pos, SEEK_SET) < 0)
390   if (fwrite(buf, len, 1, data->disk->image) != 1)
392   data->pos = ftell(data->disk->image);
405   DITRACE(disk, ("seek - instance=%ld pos_hi=%ld pos_lo=%ld\n",
431     DITRACE(disk, ("max-transfer - instance=%ld max-transfer=%ld\n",
458     DITRACE(disk, ("block-size - instance=%ld block-size=%ld\n",
485     DITRACE(disk, ("#blocks - instance=%ld #blocks=%ld\n",
514   hw_disk_device *disk = device_data(me);
516   data->disk = disk;
522   DITRACE(disk, ("create - path=%s(%s) instance=%ld\n",
553   { "disk", hw_disk_create, &hw_disk_callbacks },