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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
/*
* Support for harddisk partitions.
*
* To be compatible with LinuxPPC and Apple we use the standard Apple
* SCSI disk partitioning scheme. For more information see:
* http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
*/
#include <common.h>
#include <command.h>
#include <log.h>
#include <memalign.h>
#include <ide.h>
#include "part_mac.h"
#include <part.h>
/* stdlib.h causes some compatibility problems; should fixe these! -- wd */
#ifndef __ldiv_t_defined
typedef struct {
long int quot; /* Quotient */
long int rem; /* Remainder */
} ldiv_t;
extern ldiv_t ldiv (long int __numer, long int __denom);
# define __ldiv_t_defined 1
#endif
static int part_mac_read_ddb(struct blk_desc *dev_desc,
mac_driver_desc_t *ddb_p);
static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
mac_partition_t *pdb_p);
/*
* Test for a valid MAC partition
*/
static int part_test_mac(struct blk_desc *dev_desc)
{
ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
ulong i, n;
if (part_mac_read_ddb (dev_desc, ddesc)) {
/*
* error reading Driver Descriptor Block,
* or no valid Signature
*/
return (-1);
}
n = 1; /* assuming at least one partition */
for (i=1; i<=n; ++i) {
if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) ||
(mpart->signature != MAC_PARTITION_MAGIC) ) {
return (-1);
}
/* update partition count */
n = mpart->map_count;
}
return (0);
}
static void part_print_mac(struct blk_desc *dev_desc)
{
ulong i, n;
ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
ldiv_t mb, gb;
if (part_mac_read_ddb (dev_desc, ddesc)) {
/*
* error reading Driver Descriptor Block,
* or no valid Signature
*/
return;
}
n = ddesc->blk_count;
mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
/* round to 1 digit */
mb.rem *= 10 * ddesc->blk_size;
mb.rem += 512 * 1024;
mb.rem /= 1024 * 1024;
gb = ldiv(10 * mb.quot + mb.rem, 10240);
gb.rem += 512;
gb.rem /= 1024;
printf ("Block Size=%d, Number of Blocks=%d, "
"Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
"DeviceType=0x%x, DeviceId=0x%x\n\n"
" #: type name"
" length base (size)\n",
ddesc->blk_size,
ddesc->blk_count,
mb.quot, mb.rem, gb.quot, gb.rem,
ddesc->dev_type, ddesc->dev_id
);
n = 1; /* assuming at least one partition */
for (i=1; i<=n; ++i) {
ulong bytes;
char c;
printf ("%4ld: ", i);
if (blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) {
printf ("** Can't read Partition Map on %d:%ld **\n",
dev_desc->devnum, i);
return;
}
if (mpart->signature != MAC_PARTITION_MAGIC) {
printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
dev_desc->devnum, i, MAC_PARTITION_MAGIC,
mpart->signature);
return;
}
/* update partition count */
n = mpart->map_count;
c = 'k';
bytes = mpart->block_count;
bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */
if (bytes >= 1024) {
bytes >>= 10;
c = 'M';
}
if (bytes >= 1024) {
bytes >>= 10;
c = 'G';
}
printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
mpart->type,
mpart->name,
mpart->block_count,
mpart->start_block,
bytes, c
);
}
return;
}
/*
* Read Device Descriptor Block
*/
static int part_mac_read_ddb(struct blk_desc *dev_desc,
mac_driver_desc_t *ddb_p)
{
if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
debug("** Can't read Driver Descriptor Block **\n");
return (-1);
}
if (ddb_p->signature != MAC_DRIVER_MAGIC) {
return (-1);
}
return (0);
}
/*
* Read Partition Descriptor Block
*/
static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
mac_partition_t *pdb_p)
{
int n = 1;
for (;;) {
/*
* We must always read the descritpor block for
* partition 1 first since this is the only way to
* know how many partitions we have.
*/
if (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
printf ("** Can't read Partition Map on %d:%d **\n",
dev_desc->devnum, n);
return (-1);
}
if (pdb_p->signature != MAC_PARTITION_MAGIC) {
printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
dev_desc->devnum, n, MAC_PARTITION_MAGIC,
pdb_p->signature);
return (-1);
}
if (n == part)
return (0);
if ((part < 1) || (part > pdb_p->map_count)) {
printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
dev_desc->devnum, part,
dev_desc->devnum,
dev_desc->devnum, pdb_p->map_count);
return (-1);
}
/* update partition count */
n = part;
}
/* NOTREACHED */
}
static int part_get_info_mac(struct blk_desc *dev_desc, int part,
struct disk_partition *info)
{
ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
if (part_mac_read_ddb (dev_desc, ddesc)) {
return (-1);
}
info->blksz = ddesc->blk_size;
if (part_mac_read_pdb (dev_desc, part, mpart)) {
return (-1);
}
info->start = mpart->start_block;
info->size = mpart->block_count;
memcpy (info->type, mpart->type, sizeof(info->type));
memcpy (info->name, mpart->name, sizeof(info->name));
return (0);
}
U_BOOT_PART_TYPE(mac) = {
.name = "MAC",
.part_type = PART_TYPE_MAC,
.max_entries = MAC_ENTRY_NUMBERS,
.get_info = part_get_info_mac,
.print = part_print_mac,
.test = part_test_mac,
};
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