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/*
*
* (C) Copyright IBM Corp. 2001, 2003
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Module: libmac.so
*
* File: mac_disklabel.h
*/
#ifndef _MAC_DISKLABEL_H
#define _MAC_DISKLABEL_H 1
/*
mac disk labeling follows these rules:
If you will be creating a MacOS compatibility disk then you need to keep several partitions
for MacOS.
order type name length system
-----------------------------------------------------------------------------------------
1 Apple_partition_map Apple 63 (1st track ?) partition map
2 Apple_Driver43 Macintosh 54 driver 4.3
3 Apple_Driver43 Macintosh 74 driver 4.3
4 Apple_Driver_IOKit Macintosh 512 unknown
5 Apple_Patches Patch Partition 512 unknown
6 Apple_Bootstrap bootstrap 1600 unknown
7 Apple_Free Extra xxxx free space for linux partitions
8 Apple_HFS untitled xxxx HFS ... min of 160 meg
Mac partitions have both a type and a name and both are strings!
NewWorld Macs are those brightly colored machines.
For NewWorld PowerMac systems you must have an 800k Apple_Bootstrap partition appearing before any MacOS
partitions.
You could create an Apple_UNIX_SRV2 partition in the free space and use it as Linux native.
Linux partitions should always appear before the MacOS or MacOSX partitions.
In the mac disklabel ... a block == a hardsector ... 512 bytes.
The partition name does not matter EXCEPT for swap ... which should be named swap. using mount points as
the partition name is a good idea.
MacOSX uses UFS partitions created by Drive Setup as a placeholder. It deletes them and creates two
bootstrap partitions ... then recreates a UFS partition with the remainder of the room.
Creating more than 15 partitions is not advised.
*/
#define MAC_DISK_MAGIC 0x4552
typedef struct mac_driver_desc {
u_int16_t signature; // MAC_DRIVER_MAGIC
u_int16_t block_size; // usually 512 ... could be some multiple of 2 ?
u_int32_t block_count; // size of driver in blocks
u_int16_t dev_type; // ?
u_int16_t dev_id; // ?
u_int32_t data; // ?
u_int16_t driver_count; // number of driver descriptors
u_int32_t start; // block number of start of useable space on disk
u_int32_t size; // size of disk in blocks
u_int16_t os_type; // operating system
char sector_padding[486]; // remainder of sector is reserved for driver
} mac_disklabel_t;
#define MAC_PARTITION_MAGIC 0x504d
#define MAC_STATUS_BOOTABLE 8 // means partition is bootable
#define PMAP_STRING_SIZE 32 // maximum string size in a mac partition record
typedef struct mac_partition {
u_int16_t signature; // MAC_PARTITION_MAGIC
u_int16_t res1;
u_int32_t map_count; // # blocks in partition map
u_int32_t start_block; // absolute starting block # of partition
u_int32_t block_count; // number of blocks in partition
char name[PMAP_STRING_SIZE]; // partition name
char type[PMAP_STRING_SIZE]; // string type description
u_int32_t data_start; // rel block # of first data block
u_int32_t data_count; // number of data blocks
u_int32_t status; // partition status bits
u_int32_t boot_start;
u_int32_t boot_size;
u_int32_t boot_load;
u_int32_t boot_load2;
u_int32_t boot_entry;
u_int32_t boot_entry2;
u_int32_t boot_cksum;
char processor[16]; // identifies ISA of boot, 680x0 x=0,2,3,4
char sector_padding[376];
} mac_partition_t;
#define MAC_PMAP_STRING "Apple_partition_map" // partition contains mac partition map
#define MAC_DRIVER_STRING "Apple_Driver" // partition contains a device driver
#define MAC_DRIVER43_STRING "Apple_Driver43" // partition contains scsi mgr 4.3 driver
#define MAC_HFS_STRING "Apple_HFS" // hfs or hfs extd file system
#define MAC_MFS_STRING "Apple_MFS" // original macintosh file system
#define MAC_SCRATCH_STRING "Apple_Scratch" // empty partition
#define MAC_PRODOS_STRING "Apple_PRODOS" // proDOS file system
#define MAC_FREE_STRING "Apple_Free" // free space partition
#define MAC_SWAP_STRING "Apple_Swap"
#define MAC_AUX_STRING "Apple_Aux"
#define MAC_MSDOS_STRING "Apple_MSDOS"
#define MAC_MINIX_STRING "Apple_Minix"
#define MAC_AFFS_STRING "Apple_AFFS"
#define MAC_EXT2_STRING "Apple_EXT2"
#define MAC_UNIX_SVR2 "Apple_Unix_SVR2" // some kind of Unix partition ... Linux
#define MAC_STATUS_MASK 0x7F // mask for partition record status field
#define MAC_STATUS_VALID 0x01 // partition record is valid
#define MAC_STATUS_ALLOCATED 0x02 // partition is allocated
#define MAC_STATUS_INUSE 0x04 // partition in-use ... cleared with reboot
#define MAC_STATUS_BOOTINFO 0x08 // partition has boot info
#define MAC_STATUS_READ 0x10 // partition is readable
#define MAC_STATUS_WRITE 0x20 // partition is writable
#define MAC_STATUS_PINNED 0x40 // partition boot code is position independent
#define MAC_MAX_PARTITIONS 32 // max number of MAC partition records in the PMAP
static inline void string_to_upper_case(char *str)
{
int i;
for(i=0;i<strlen(str); i++){
if (str[i] >= 'a' && str[i] <= 'z') {
str[i] -= 0x20;
}
}
}
static inline boolean isa_mac_pmap_partition( mac_partition_t *p )
{
if ( strncmp(p->type,MAC_PMAP_STRING,PMAP_STRING_SIZE) == 0 ) {
return TRUE;
}
return FALSE;
}
static inline boolean isa_mac_freespace_partition( mac_partition_t *p )
{
if ( strncmp(p->type,MAC_FREE_STRING,PMAP_STRING_SIZE) == 0 ) {
return TRUE;
}
return FALSE;
}
static inline boolean isa_mac_scratch_partition( mac_partition_t *p )
{
if ( strncmp(p->type,MAC_SCRATCH_STRING,PMAP_STRING_SIZE) == 0 ) {
return TRUE;
}
return FALSE;
}
static inline boolean isa_mac_null_partition( mac_partition_t *p )
{
if ( strlen(p->type)==0 && strlen(p->name)==0 ) {
return TRUE;
}
return FALSE;
}
static inline boolean isa_mac_linux_partition( mac_partition_t *p )
{
char p_name[PMAP_STRING_SIZE+1];
if ( strncmp(p->type,MAC_UNIX_SVR2,PMAP_STRING_SIZE) == 0 ) {
strncpy(p_name, p->name, PMAP_STRING_SIZE);
string_to_upper_case(p_name);
if ( strncmp(p_name,"LINUX",PMAP_STRING_SIZE) == 0 ||
strncmp(p_name,"SWAP", PMAP_STRING_SIZE) == 0 ) {
return TRUE;
}
}
return FALSE;
}
static inline boolean isa_mac_data_partition( mac_partition_t *p )
{
if ( isa_mac_pmap_partition( p ) == FALSE &&
isa_mac_freespace_partition( p ) == FALSE &&
isa_mac_scratch_partition( p ) == FALSE &&
isa_mac_null_partition( p ) == FALSE ) {
return TRUE;
}
return FALSE;
}
#endif
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