723 	struct header hdr;  in amiga_read()  local
735 		raw = decode ((ulong *)&hdr.magic, (ulong *)raw, 4);  in amiga_read()
736 		raw = decode ((ulong *)&hdr.labels, (ulong *)raw, 16);  in amiga_read()
737 		raw = decode ((ulong *)&hdr.hdrchk, (ulong *)raw, 4);  in amiga_read()
738 		raw = decode ((ulong *)&hdr.datachk, (ulong *)raw, 4);  in amiga_read()
739 		csum = checksum((ulong *)&hdr,  in amiga_read()
740 				(char *)&hdr.hdrchk-(char *)&hdr);  in amiga_read()
744 			hdr.magic, hdr.track, hdr.sect, hdr.ord,  in amiga_read()
745 			*(ulong *)&hdr.labels[0], *(ulong *)&hdr.labels[4],  in amiga_read()
746 			*(ulong *)&hdr.labels[8], *(ulong *)&hdr.labels[12],  in amiga_read()
747 			hdr.hdrchk, hdr.datachk);  in amiga_read()
750 		if (hdr.hdrchk != csum) {  in amiga_read()
751 			printk(KERN_INFO "MFM_HEADER: %08lx,%08lx\n", hdr.hdrchk, csum);  in amiga_read()
756 		if (hdr.track != unit[drive].track) {  in amiga_read()
757 			printk(KERN_INFO "MFM_TRACK: %d, %d\n", hdr.track, unit[drive].track);  in amiga_read()
761 		raw = decode ((ulong *)(unit[drive].trackbuf + hdr.sect*512),  in amiga_read()
763 		csum = checksum((ulong *)(unit[drive].trackbuf + hdr.sect*512), 512);  in amiga_read()
765 		if (hdr.datachk != csum) {  in amiga_read()
767 			       hdr.magic, hdr.track, hdr.sect, hdr.ord, scnt,  in amiga_read()
768 			       hdr.datachk, csum);  in amiga_read()
770 				((ulong *)(unit[drive].trackbuf+hdr.sect*512))[0],  in amiga_read()
771 				((ulong *)(unit[drive].trackbuf+hdr.sect*512))[1],  in amiga_read()
772 				((ulong *)(unit[drive].trackbuf+hdr.sect*512))[2],  in amiga_read()
773 				((ulong *)(unit[drive].trackbuf+hdr.sect*512))[3]);  in amiga_read()
815 	struct header hdr;  in putsec()  local
823 	hdr.magic = 0xFF;  in putsec()
824 	hdr.track = unit[disk].track;  in putsec()
825 	hdr.sect = cnt;  in putsec()
826 	hdr.ord = unit[disk].dtype->sects * unit[disk].type->sect_mult - cnt;  in putsec()
828 		hdr.labels[i] = 0;  in putsec()
829 	hdr.hdrchk = checksum((ulong *)&hdr,  in putsec()
830 			      (char *)&hdr.hdrchk-(char *)&hdr);  in putsec()
831 	hdr.datachk = checksum((ulong *)(unit[disk].trackbuf+cnt*512), 512);  in putsec()
833 	encode_block(raw, (ulong *)&hdr.magic, 4);  in putsec()
835 	encode_block(raw, (ulong *)&hdr.labels, 16);  in putsec()
837 	encode_block(raw, (ulong *)&hdr.hdrchk, 4);  in putsec()
839 	encode_block(raw, (ulong *)&hdr.datachk, 4);  in putsec()
988 static inline ushort dos_hdr_crc (struct dos_header *hdr)  in dos_hdr_crc()  argument
990 	return dos_crc(&(hdr->track), 0xb2, 0x30, 3); /* precomputed magic */  in dos_hdr_crc()
1038 	struct dos_header hdr;  in dos_read()  local
1057 		raw = dos_decode((unsigned char *)&hdr,(ushort *) raw,8);  in dos_read()
1058 		crc = dos_hdr_crc(&hdr);  in dos_read()
1061 		printk("(%3d,%d,%2d,%d) %x\n", hdr.track, hdr.side,  in dos_read()
1062 		       hdr.sec, hdr.len_desc, hdr.crc);  in dos_read()
1065 		if (crc != hdr.crc) {  in dos_read()
1067 			       hdr.crc, crc);  in dos_read()
1070 		if (hdr.track != unit[drive].track/unit[drive].type->heads) {  in dos_read()
1072 			       hdr.track,  in dos_read()
1077 		if (hdr.side != unit[drive].track%unit[drive].type->heads) {  in dos_read()
1079 			       hdr.side,  in dos_read()
1084 		if (hdr.len_desc != 2) {  in dos_read()
1086 			       "descriptor %d\n", hdr.len_desc);  in dos_read()
1095 			       unit[drive].track, drive, scnt, hdr.sec);  in dos_read()
1105 			       hdr.track,hdr.side,hdr.sec,hdr.len_desc,scnt);  in dos_read()
1110 …raw = dos_decode((unsigned char *)(unit[drive].trackbuf + (hdr.sec - 1) * 512), (ushort *) raw, 51…  in dos_read()
1112 		crc = dos_data_crc(unit[drive].trackbuf + (hdr.sec - 1) * 512);  in dos_read()
1116 			       "sc=%d, %x %x\n", hdr.track, hdr.side,  in dos_read()
1117 			       hdr.sec, hdr.len_desc, scnt,data_crc[0], crc);  in dos_read()
1119 			       ((ulong *)(unit[drive].trackbuf+(hdr.sec-1)*512))[0],  in dos_read()
1120 			       ((ulong *)(unit[drive].trackbuf+(hdr.sec-1)*512))[1],  in dos_read()
1121 			       ((ulong *)(unit[drive].trackbuf+(hdr.sec-1)*512))[2],  in dos_read()
1122 			       ((ulong *)(unit[drive].trackbuf+(hdr.sec-1)*512))[3]);  in dos_read()
1155 	static struct dos_header hdr={0,0,0,2,0,  in ms_putsec()  local
1170 	hdr.track=unit[drive].track/unit[drive].type->heads;  in ms_putsec()
1171 	hdr.side=unit[drive].track%unit[drive].type->heads;  in ms_putsec()
1172 	hdr.sec=cnt+1;  in ms_putsec()
1173 	hdr.crc=dos_hdr_crc(&hdr);  in ms_putsec()
1176 	dos_encode_block((ushort *)raw,(unsigned char *) &hdr.track,28);  in ms_putsec()