block/partitions/atari.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  *  fs/partitions/atari.h
0004  *  Moved by Russell King from:
0005  *
0006  * linux/include/linux/atari_rootsec.h
0007  * definitions for Atari Rootsector layout
0008  * by Andreas Schwab (schwab@ls5.informatik.uni-dortmund.de)
0009  *
0010  * modified for ICD/Supra partitioning scheme restricted to at most 12
0011  * partitions
0012  * by Guenther Kelleter (guenther@pool.informatik.rwth-aachen.de)
0013  */
0014
0015 #include <linux/compiler.h>
0016
0017 struct partition_info
0018 {
0019   u8 flg;           /* bit 0: active; bit 7: bootable */
0020   char id[3];           /* "GEM", "BGM", "XGM", or other */
0021   __be32 st;            /* start of partition */
0022   __be32 siz;           /* length of partition */
0023 };
0024
0025 struct rootsector
0026 {
0027   char unused[0x156];       /* room for boot code */
0028   struct partition_info icdpart[8]; /* info for ICD-partitions 5..12 */
0029   char unused2[0xc];
0030   u32 hd_siz;           /* size of disk in blocks */
0031   struct partition_info part[4];
0032   u32 bsl_st;           /* start of bad sector list */
0033   u32 bsl_cnt;          /* length of bad sector list */
0034   u16 checksum;         /* checksum for bootable disks */
0035 } __packed;
0036