25 void lba_to_chs(const struct driveinfo *drive_info, const int lba,  in lba_to_chs()  argument
32     if (drive_info->edd_params.sectors_per_track > 0 &&  in lba_to_chs()
33 	drive_info->edd_params.heads > 0) {  in lba_to_chs()
34 	*cylinder = (lba % drive_info->edd_params.sectors_per_track) + 1;  in lba_to_chs()
35 	track = lba / drive_info->edd_params.sectors_per_track;  in lba_to_chs()
36 	*head = track % drive_info->edd_params.heads;  in lba_to_chs()
37 	*sector = track / drive_info->edd_params.heads;  in lba_to_chs()
38     } else if (drive_info->cbios) {  in lba_to_chs()
39 	*cylinder = (lba % drive_info->legacy_sectors_per_track) + 1;  in lba_to_chs()
40 	track = lba / drive_info->legacy_sectors_per_track;  in lba_to_chs()
41 	*head = track % (drive_info->legacy_max_head + 1);  in lba_to_chs()
42 	*sector = track / (drive_info->legacy_max_head + 1);  in lba_to_chs()
79 static int detect_extensions(struct driveinfo *drive_info)  in detect_extensions()  argument
88     getebios.edx.b[0] = drive_info->disk;  in detect_extensions()
94 	drive_info->ebios = 1;  in detect_extensions()
95 	drive_info->edd_version = ebios.eax.b[1];  in detect_extensions()
96 	drive_info->edd_functionality_subset = ebios.ecx.w[0];  in detect_extensions()
120 static int get_drive_parameters_with_extensions(struct driveinfo *drive_info)  in get_drive_parameters_with_extensions()  argument
145     inreg.edx.b[0] = drive_info->disk;  in get_drive_parameters_with_extensions()
156     memcpy(&drive_info->edd_params, dp, sizeof drive_info->edd_params);  in get_drive_parameters_with_extensions()
210 static int get_drive_parameters_without_extensions(struct driveinfo *drive_info)  in get_drive_parameters_without_extensions()  argument
220     getparm.edx.b[0] = drive_info->disk;  in get_drive_parameters_without_extensions()
230     drive_info->legacy_max_drive = parm.edx.b[0];  in get_drive_parameters_without_extensions()
237     drive_info->legacy_type = parm.ebx.b[0];  in get_drive_parameters_without_extensions()
240     drive_info->legacy_max_head = parm.edx.b[1];  in get_drive_parameters_without_extensions()
243     drive_info->legacy_sectors_per_track = parm.ecx.b[0] & 0x3f;  in get_drive_parameters_without_extensions()
250     drive_info->legacy_max_cylinder = parm.ecx.b[1] +  in get_drive_parameters_without_extensions()
253     if (drive_info->legacy_sectors_per_track > 0)  in get_drive_parameters_without_extensions()
254 	drive_info->cbios = 1;	/* Valid geometry */  in get_drive_parameters_without_extensions()
263 int get_drive_parameters(struct driveinfo *drive_info)  in get_drive_parameters()  argument
267     if (detect_extensions(drive_info))  in get_drive_parameters()
270     return_code = get_drive_parameters_without_extensions(drive_info);  in get_drive_parameters()
274     if (drive_info->ebios && drive_info->cbios)  in get_drive_parameters()
275 	get_drive_parameters_with_extensions(drive_info);  in get_drive_parameters()