xref: /OK3568_Linux_fs/kernel/block/partitions/mac.h (revision 4882a59341e53eb6f0b4789bf948001014eff981)
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun  *  fs/partitions/mac.h
4*4882a593Smuzhiyun  */
5*4882a593Smuzhiyun 
6*4882a593Smuzhiyun #define MAC_PARTITION_MAGIC	0x504d
7*4882a593Smuzhiyun 
8*4882a593Smuzhiyun /* type field value for A/UX or other Unix partitions */
9*4882a593Smuzhiyun #define APPLE_AUX_TYPE	"Apple_UNIX_SVR2"
10*4882a593Smuzhiyun 
11*4882a593Smuzhiyun struct mac_partition {
12*4882a593Smuzhiyun 	__be16	signature;	/* expected to be MAC_PARTITION_MAGIC */
13*4882a593Smuzhiyun 	__be16	res1;
14*4882a593Smuzhiyun 	__be32	map_count;	/* # blocks in partition map */
15*4882a593Smuzhiyun 	__be32	start_block;	/* absolute starting block # of partition */
16*4882a593Smuzhiyun 	__be32	block_count;	/* number of blocks in partition */
17*4882a593Smuzhiyun 	char	name[32];	/* partition name */
18*4882a593Smuzhiyun 	char	type[32];	/* string type description */
19*4882a593Smuzhiyun 	__be32	data_start;	/* rel block # of first data block */
20*4882a593Smuzhiyun 	__be32	data_count;	/* number of data blocks */
21*4882a593Smuzhiyun 	__be32	status;		/* partition status bits */
22*4882a593Smuzhiyun 	__be32	boot_start;
23*4882a593Smuzhiyun 	__be32	boot_size;
24*4882a593Smuzhiyun 	__be32	boot_load;
25*4882a593Smuzhiyun 	__be32	boot_load2;
26*4882a593Smuzhiyun 	__be32	boot_entry;
27*4882a593Smuzhiyun 	__be32	boot_entry2;
28*4882a593Smuzhiyun 	__be32	boot_cksum;
29*4882a593Smuzhiyun 	char	processor[16];	/* identifies ISA of boot */
30*4882a593Smuzhiyun 	/* there is more stuff after this that we don't need */
31*4882a593Smuzhiyun };
32*4882a593Smuzhiyun 
33*4882a593Smuzhiyun #define MAC_STATUS_BOOTABLE	8	/* partition is bootable */
34*4882a593Smuzhiyun 
35*4882a593Smuzhiyun #define MAC_DRIVER_MAGIC	0x4552
36*4882a593Smuzhiyun 
37*4882a593Smuzhiyun /* Driver descriptor structure, in block 0 */
38*4882a593Smuzhiyun struct mac_driver_desc {
39*4882a593Smuzhiyun 	__be16	signature;	/* expected to be MAC_DRIVER_MAGIC */
40*4882a593Smuzhiyun 	__be16	block_size;
41*4882a593Smuzhiyun 	__be32	block_count;
42*4882a593Smuzhiyun     /* ... more stuff */
43*4882a593Smuzhiyun };
44*4882a593Smuzhiyun 
45