/*
* partition.c - partition table support
*
+ * Copyright (C) 2004 Sven Luther
+ *
* Copyright (C) 2001, 2002 Ethan Benson
*
* Copyright (C) 1999 Benjamin Herrenschmidt
#include "stdlib.h"
#include "mac-part.h"
#include "fdisk-part.h"
+#include "amiga-part.h"
#include "partition.h"
#include "prom.h"
#include "string.h"
#include "linux/iso_fs.h"
#include "debug.h"
#include "errors.h"
+#include "byteorder.h"
/* We currently don't check the partition type, some users
* are putting crap there and still expect it to work...
NULL
};
#endif
-
-/* Local functions */
-static unsigned long swab32(unsigned long value);
#define MAX_BLOCK_SIZE 2048
static unsigned char block_buffer[MAX_BLOCK_SIZE];
static void
add_new_partition(struct partition_t** list, int part_number, const char *part_type,
const char *part_name, unsigned long part_start, unsigned long part_size,
- unsigned short part_blocksize)
+ unsigned short part_blocksize, int sys_ind)
{
struct partition_t* part;
part = (struct partition_t*)malloc(sizeof(struct partition_t));
-
+
part->part_number = part_number;
strncpy(part->part_type, part_type, MAX_PART_NAME);
strncpy(part->part_name, part_name, MAX_PART_NAME);
part->part_start = part_start;
part->part_size = part_size;
part->blocksize = part_blocksize;
+ part->sys_ind = sys_ind;
/* Tack this entry onto the list */
part->next = *list;
struct mac_partition* part = (struct mac_partition *)block_buffer;
unsigned short ptable_block_size =
((struct mac_driver_desc *)block_buffer)->block_size;
-
+
map_size = 1;
for (block=1; block < map_size + 1; block++)
{
}
if (block == 1)
map_size = part->map_count;
-
+
#ifdef CHECK_FOR_VALID_MAC_PARTITION_TYPE
- /* We don't bother looking at swap partitions of any type,
+ /* We don't bother looking at swap partitions of any type,
* and the rest are the ones we know about */
for (ptype = valid_mac_partition_types; ptype; ptype++)
if (!strcmp (part->type, ptype))
part->name, /* name */
part->start_block + part->data_start, /* start */
part->data_count, /* size */
- ptable_block_size );
+ ptable_block_size,
+ 0);
}
}
-/*
+/*
* Same function as partition_mac_lookup(), except for fdisk
* partitioned disks.
*/
/* fdisk partition tables start at offset 0x1be
* from byte 0 of the boot drive.
*/
- struct fdisk_partition* part =
+ struct fdisk_partition* part =
(struct fdisk_partition *) (block_buffer + 0x1be);
for (partition=1; partition <= 4 ;partition++, part++) {
- if (part->sys_ind == LINUX_NATIVE) {
+ if (part->sys_ind == LINUX_NATIVE || part->sys_ind == LINUX_RAID) {
add_new_partition( list,
partition,
"Linux", /* type */
'\0', /* name */
- swab32(*(unsigned int *)(part->start4)),
- swab32(*(unsigned int *)(part->size4)),
- 512 /*blksize*/ );
+ le32_to_cpu(*(unsigned int *)part->start4),
+ le32_to_cpu(*(unsigned int *)part->size4),
+ 512 /*blksize*/,
+ part->sys_ind /* partition type */ );
}
}
}
prom_printf("Can't read volume desc block %d\n", block);
break;
}
-
+
vdp = (struct iso_volume_descriptor *)block_buffer;
-
- /* Due to the overlapping physical location of the descriptors,
- * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure
+
+ /* Due to the overlapping physical location of the descriptors,
+ * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure
* proper identification in this case, we first check for ISO.
*/
if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
return 1;
}
}
-
+
return 0;
}
+/*
+ * Detects and read amiga partition tables.
+ */
+
+static int
+_amiga_checksum (unsigned int blk_size)
+{
+ unsigned int sum;
+ int i, end;
+ unsigned int *amiga_block = (unsigned int *) block_buffer;
+
+ sum = amiga_block[0];
+ end = amiga_block[AMIGA_LENGTH];
+
+ if (end > blk_size) end = blk_size;
+
+ for (i = 1; i < end; i++) sum += amiga_block[i];
+
+ return sum;
+}
+
+static int
+_amiga_find_rdb (const char *dev_name, prom_handle disk, unsigned int prom_blksize)
+{
+ int i;
+ unsigned int *amiga_block = (unsigned int *) block_buffer;
+
+ for (i = 0; i<AMIGA_RDB_MAX; i++) {
+ if (i != 0) {
+ if (prom_readblocks(disk, i, 1, block_buffer) != 1) {
+ prom_printf("Can't read boot block %d\n", i);
+ break;
+ }
+ }
+ if ((amiga_block[AMIGA_ID] == AMIGA_ID_RDB) && (_amiga_checksum (prom_blksize) == 0))
+ return 1;
+ }
+ /* Amiga partition table not found, let's reread block 0 */
+ if (prom_readblocks(disk, 0, 1, block_buffer) != 1) {
+ prom_printf("Can't read boot blocks\n");
+ return 0; /* TODO: something bad happened, should fail more verbosely */
+ }
+ return 0;
+}
+
+static void
+partition_amiga_lookup( const char *dev_name, prom_handle disk,
+ unsigned int prom_blksize, struct partition_t** list )
+{
+ int partition, part;
+ unsigned int blockspercyl;
+ unsigned int *amiga_block = (unsigned int *) block_buffer;
+ unsigned int *used = NULL;
+ unsigned int possible;
+ int checksum;
+ int i;
+
+ blockspercyl = amiga_block[AMIGA_SECT] * amiga_block[AMIGA_HEADS];
+ possible = amiga_block[AMIGA_RDBLIMIT]/32 +1;
+
+ used = (unsigned int *) malloc (sizeof (unsigned int) * (possible + 1));
+ if (!used) {
+ prom_printf("Can't allocate memory\n");
+ return;
+ }
+
+ for (i=0; i < possible; i++) used[i] = 0;
+
+
+ for (part = amiga_block[AMIGA_PARTITIONS], partition = 0;
+ part != AMIGA_END;
+ part = amiga_block[AMIGA_PART_NEXT], partition++)
+ {
+ if (prom_readblocks(disk, part, 1, block_buffer) != 1) {
+ prom_printf("Can't read partition block %d\n", part);
+ break;
+ }
+ checksum = _amiga_checksum (prom_blksize);
+ if ((amiga_block[AMIGA_ID] == AMIGA_ID_PART) &&
+ (checksum == 0) &&
+ ((used[part/32] & (0x1 << (part % 32))) == 0))
+ {
+ used[part/32] |= (0x1 << (part % 32));
+ } else {
+ prom_printf("Amiga partition table corrupted at block %d\n", part);
+ if (amiga_block[AMIGA_ID] != AMIGA_ID_PART)
+ prom_printf ("block type is not partition but %08x\n", amiga_block[AMIGA_ID]);
+ if (checksum != 0)
+ prom_printf ("block checsum is bad : %d\n", checksum);
+ if ((used[part/32] & (0x1 << (part % 32))) != 0)
+ prom_printf ("partition table is looping, block %d already traveled\n", part);
+ break;
+ }
+
+ /* We use the partition block size from the partition table.
+ * The filesystem implmentations are responsible for mapping
+ * to their own fs blocksize */
+ add_new_partition(
+ list, /* partition list */
+ partition, /* partition number */
+ "Linux", /* type */
+ '\0', /* name */
+ blockspercyl * amiga_block[AMIGA_PART_LOWCYL], /* start */
+ blockspercyl * (amiga_block[AMIGA_PART_HIGHCYL] - amiga_block[AMIGA_PART_LOWCYL] + 1), /* size */
+ prom_blksize,
+ 0 );
+ }
+ if (used)
+ free(used);
+}
+
struct partition_t*
partitions_lookup(const char *device)
{
struct mac_driver_desc *desc = (struct mac_driver_desc *)block_buffer;
struct partition_t* list = NULL;
unsigned int prom_blksize, iso_root_block;
-
+
strncpy(block_buffer, device, 2040);
strcat(block_buffer, ":0");
-
+
/* Open device */
disk = prom_open(block_buffer);
if (disk == NULL) {
prom_printf("block_size %d not supported !\n", prom_blksize);
goto bail;
}
-
+
/* Read boot blocs */
if (prom_readblocks(disk, 0, 1, block_buffer) != 1) {
prom_printf("Can't read boot blocks\n");
goto bail;
- }
+ }
if (desc->signature == MAC_DRIVER_MAGIC) {
/* pdisk partition format */
partition_mac_lookup(device, disk, prom_blksize, &list);
'\0',
iso_root_block,
0,
- prom_blksize);
+ prom_blksize,
+ 0);
prom_printf("ISO9660 disk\n");
+ } else if (_amiga_find_rdb(device, disk, prom_blksize) != -1) {
+ /* amiga partition format */
+ partition_amiga_lookup(device, disk, prom_blksize, &list);
} else {
prom_printf("No supported partition table detected\n");
goto bail;
bail:
prom_close(disk);
-
+
return list;
}
if ((partition >= 0) && (partition == p->part_number)) {
type = strdup(p->part_type);
break;
- }
+ }
}
if (parts)
partitions_free(parts);
partitions_free(struct partition_t* list)
{
struct partition_t* next;
-
+
while(list) {
next = list->next;
free(list);
list = next;
}
}
-unsigned long
-swab32(unsigned long value)
-{
- __u32 result;
-
- __asm__("rlwimi %0,%1,24,16,23\n\t"
- "rlwimi %0,%1,8,8,15\n\t"
- "rlwimi %0,%1,24,0,7"
- : "=r" (result)
- : "r" (value), "0" (value >> 24));
- return result;
-}
-/*
+/*
* Local variables:
* c-file-style: "k&r"
* c-basic-offset: 5
projects / yaboot.git / blobdiff