pc98/pc98/pc98_machdep.c

54     "IDE disk geometry conversion method");
214 pc98_ata_disk_geom_adjust_idebios(struct disk *disk)
217 	if (disk->d_mediasize < MEDIASIZE_4_3G) {
218 		disk->d_fwsectors = 17;
219 		disk->d_fwheads = 8;
220 	} else if (disk->d_mediasize < MEDIASIZE_29_5G) {
221 		disk->d_fwsectors = 63;
222 		if (disk->d_fwheads != 15)	/* Allow 15H63S. */
223 			disk->d_fwheads = 16;
224 	} else if (disk->d_mediasize < MEDIASIZE_31_5G) {
225 		disk->d_fwsectors = 63;
226 		disk->d_fwheads = 16;
227 	} else if (disk->d_mediasize < MEDIASIZE_127G) {
228 		disk->d_fwsectors = 255;
229 		disk->d_fwheads = 16;
232 		disk->d_fwsectors = 255;
233 		disk->d_fwheads = 255;
239 pc98_ata_disk_geom_adjust_scsibios(struct disk *disk)
242 	if (disk->d_mediasize < MEDIASIZE_8G) {
243 		disk->d_fwsectors = 32;
244 		disk->d_fwheads = 8;
245 	} else if (disk->d_mediasize < MEDIASIZE_32G) {
246 		disk->d_fwsectors = 128;
247 		disk->d_fwheads = 8;
248 	} else if (disk->d_mediasize < MEDIASIZE_60G) {
250 		disk->d_fwsectors = 128;
251 		disk->d_fwheads = 15;
252 	} else if (disk->d_mediasize < MEDIASIZE_120G) {
253 		disk->d_fwsectors = 255;
254 		disk->d_fwheads = 15;
257 		disk->d_fwsectors = 255;
258 		disk->d_fwheads = 255;
264 pc98_ata_disk_geom_adjust_cyl16bit(struct disk *disk)
266 	off_t totsec = disk->d_mediasize / disk->d_sectorsize;
267 	off_t cyl = totsec / disk->d_fwsectors / disk->d_fwheads;
276 			disk->d_fwsectors = 17;
277 			disk->d_fwheads = 8;
279 			disk->d_fwsectors = 63;
280 			disk->d_fwheads = 16;
282 			disk->d_fwsectors = 255;
283 			disk->d_fwheads = 16;
285 			disk->d_fwsectors = 255;
286 			disk->d_fwheads = 255;
292 pc98_ata_disk_firmware_geom_adjust(struct disk *disk)
296 	oldsectors = disk->d_fwsectors;
297 	oldheads = disk->d_fwheads;
301 		pc98_ata_disk_geom_adjust_idebios(disk);
304 		pc98_ata_disk_geom_adjust_scsibios(disk);
307 		pc98_ata_disk_geom_adjust_cyl16bit(disk);
315 	    (oldsectors != disk->d_fwsectors || oldheads != disk->d_fwheads))
318 		    disk->d_name, disk->d_unit,
320 		    disk->d_fwheads, disk->d_fwsectors);