2019-04-30 18:42:39 +00:00
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// SPDX-License-Identifier: GPL-2.0
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2005-04-16 22:20:36 +00:00
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/*
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* Copyright (c) 1996-2000 Russell King.
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*
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* Scan ADFS partitions on hard disk drives. Unfortunately, there
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* isn't a standard for partitioning drives on Acorn machines, so
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* every single manufacturer of SCSI and IDE cards created their own
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* method.
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*/
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#include <linux/buffer_head.h>
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#include <linux/adfs_fs.h>
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#include "check.h"
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/*
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* Partition types. (Oh for reusability)
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*/
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#define PARTITION_RISCIX_MFM 1
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#define PARTITION_RISCIX_SCSI 2
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#define PARTITION_LINUX 9
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2007-07-16 06:39:59 +00:00
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#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
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defined(CONFIG_ACORN_PARTITION_ADFS)
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2005-04-16 22:20:36 +00:00
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static struct adfs_discrecord *
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adfs_partition(struct parsed_partitions *state, char *name, char *data,
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unsigned long first_sector, int slot)
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{
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struct adfs_discrecord *dr;
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unsigned int nr_sects;
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if (adfs_checkbblk(data))
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return NULL;
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dr = (struct adfs_discrecord *)(data + 0x1c0);
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if (dr->disc_size == 0 && dr->disc_size_high == 0)
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return NULL;
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nr_sects = (le32_to_cpu(dr->disc_size_high) << 23) |
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(le32_to_cpu(dr->disc_size) >> 9);
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2010-08-11 01:03:14 +00:00
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if (name) {
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strlcat(state->pp_buf, " [", PAGE_SIZE);
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strlcat(state->pp_buf, name, PAGE_SIZE);
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strlcat(state->pp_buf, "]", PAGE_SIZE);
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}
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2005-04-16 22:20:36 +00:00
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put_partition(state, slot, first_sector, nr_sects);
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return dr;
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}
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2007-07-16 06:39:59 +00:00
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#endif
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2005-04-16 22:20:36 +00:00
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#ifdef CONFIG_ACORN_PARTITION_RISCIX
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struct riscix_part {
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__le32 start;
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__le32 length;
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__le32 one;
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char name[16];
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};
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struct riscix_record {
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__le32 magic;
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#define RISCIX_MAGIC cpu_to_le32(0x4a657320)
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__le32 date;
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struct riscix_part part[8];
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};
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2007-07-16 06:39:59 +00:00
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#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
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defined(CONFIG_ACORN_PARTITION_ADFS)
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2010-05-15 18:09:30 +00:00
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static int riscix_partition(struct parsed_partitions *state,
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unsigned long first_sect, int slot,
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unsigned long nr_sects)
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2005-04-16 22:20:36 +00:00
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{
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Sector sect;
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struct riscix_record *rr;
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2010-05-15 18:09:30 +00:00
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rr = read_part_sector(state, first_sect, §);
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2005-04-16 22:20:36 +00:00
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if (!rr)
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return -1;
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2010-08-11 01:03:14 +00:00
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strlcat(state->pp_buf, " [RISCiX]", PAGE_SIZE);
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2005-04-16 22:20:36 +00:00
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if (rr->magic == RISCIX_MAGIC) {
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unsigned long size = nr_sects > 2 ? 2 : nr_sects;
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int part;
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2010-08-11 01:03:14 +00:00
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strlcat(state->pp_buf, " <", PAGE_SIZE);
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2005-04-16 22:20:36 +00:00
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put_partition(state, slot++, first_sect, size);
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for (part = 0; part < 8; part++) {
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if (rr->part[part].one &&
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memcmp(rr->part[part].name, "All\0", 4)) {
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put_partition(state, slot++,
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le32_to_cpu(rr->part[part].start),
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le32_to_cpu(rr->part[part].length));
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2010-08-11 01:03:14 +00:00
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strlcat(state->pp_buf, "(", PAGE_SIZE);
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strlcat(state->pp_buf, rr->part[part].name, PAGE_SIZE);
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strlcat(state->pp_buf, ")", PAGE_SIZE);
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2005-04-16 22:20:36 +00:00
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}
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}
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2010-08-11 01:03:14 +00:00
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strlcat(state->pp_buf, " >\n", PAGE_SIZE);
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2005-04-16 22:20:36 +00:00
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} else {
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put_partition(state, slot++, first_sect, nr_sects);
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}
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put_dev_sector(sect);
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return slot;
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}
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#endif
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2007-07-16 06:39:59 +00:00
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#endif
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2005-04-16 22:20:36 +00:00
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#define LINUX_NATIVE_MAGIC 0xdeafa1de
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#define LINUX_SWAP_MAGIC 0xdeafab1e
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struct linux_part {
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__le32 magic;
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__le32 start_sect;
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__le32 nr_sects;
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};
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2007-07-16 06:39:59 +00:00
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#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
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defined(CONFIG_ACORN_PARTITION_ADFS)
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2010-05-15 18:09:30 +00:00
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static int linux_partition(struct parsed_partitions *state,
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unsigned long first_sect, int slot,
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unsigned long nr_sects)
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2005-04-16 22:20:36 +00:00
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{
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Sector sect;
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struct linux_part *linuxp;
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unsigned long size = nr_sects > 2 ? 2 : nr_sects;
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2010-08-11 01:03:14 +00:00
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strlcat(state->pp_buf, " [Linux]", PAGE_SIZE);
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2005-04-16 22:20:36 +00:00
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put_partition(state, slot++, first_sect, size);
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2010-05-15 18:09:30 +00:00
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linuxp = read_part_sector(state, first_sect, §);
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2005-04-16 22:20:36 +00:00
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if (!linuxp)
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return -1;
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2010-08-11 01:03:14 +00:00
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strlcat(state->pp_buf, " <", PAGE_SIZE);
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2005-04-16 22:20:36 +00:00
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while (linuxp->magic == cpu_to_le32(LINUX_NATIVE_MAGIC) ||
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linuxp->magic == cpu_to_le32(LINUX_SWAP_MAGIC)) {
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if (slot == state->limit)
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break;
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put_partition(state, slot++, first_sect +
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le32_to_cpu(linuxp->start_sect),
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le32_to_cpu(linuxp->nr_sects));
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linuxp ++;
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}
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2010-08-11 01:03:14 +00:00
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strlcat(state->pp_buf, " >", PAGE_SIZE);
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2005-04-16 22:20:36 +00:00
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put_dev_sector(sect);
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return slot;
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}
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2007-07-16 06:39:59 +00:00
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#endif
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2005-04-16 22:20:36 +00:00
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#ifdef CONFIG_ACORN_PARTITION_CUMANA
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2010-05-15 18:09:30 +00:00
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int adfspart_check_CUMANA(struct parsed_partitions *state)
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2005-04-16 22:20:36 +00:00
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{
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unsigned long first_sector = 0;
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unsigned int start_blk = 0;
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Sector sect;
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unsigned char *data;
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char *name = "CUMANA/ADFS";
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int first = 1;
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int slot = 1;
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/*
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* Try Cumana style partitions - sector 6 contains ADFS boot block
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* with pointer to next 'drive'.
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*
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* There are unknowns in this code - is the 'cylinder number' of the
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* next partition relative to the start of this one - I'm assuming
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* it is.
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*
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* Also, which ID did Cumana use?
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*
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* This is totally unfinished, and will require more work to get it
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* going. Hence it is totally untested.
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*/
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do {
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struct adfs_discrecord *dr;
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unsigned int nr_sects;
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2010-05-15 18:09:30 +00:00
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data = read_part_sector(state, start_blk * 2 + 6, §);
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2005-04-16 22:20:36 +00:00
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if (!data)
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return -1;
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if (slot == state->limit)
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break;
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dr = adfs_partition(state, name, data, first_sector, slot++);
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if (!dr)
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break;
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name = NULL;
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nr_sects = (data[0x1fd] + (data[0x1fe] << 8)) *
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(dr->heads + (dr->lowsector & 0x40 ? 1 : 0)) *
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dr->secspertrack;
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if (!nr_sects)
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break;
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first = 0;
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first_sector += nr_sects;
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start_blk += nr_sects >> (BLOCK_SIZE_BITS - 9);
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nr_sects = 0; /* hmm - should be partition size */
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switch (data[0x1fc] & 15) {
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case 0: /* No partition / ADFS? */
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break;
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#ifdef CONFIG_ACORN_PARTITION_RISCIX
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case PARTITION_RISCIX_SCSI:
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/* RISCiX - we don't know how to find the next one. */
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2010-05-15 18:09:30 +00:00
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slot = riscix_partition(state, first_sector, slot,
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nr_sects);
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2005-04-16 22:20:36 +00:00
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break;
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#endif
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case PARTITION_LINUX:
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2010-05-15 18:09:30 +00:00
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slot = linux_partition(state, first_sector, slot,
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nr_sects);
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2005-04-16 22:20:36 +00:00
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break;
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}
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put_dev_sector(sect);
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if (slot == -1)
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return -1;
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} while (1);
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put_dev_sector(sect);
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return first ? 0 : 1;
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}
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#endif
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#ifdef CONFIG_ACORN_PARTITION_ADFS
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/*
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* Purpose: allocate ADFS partitions.
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*
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* Params : hd - pointer to gendisk structure to store partition info.
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* dev - device number to access.
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*
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* Returns: -1 on error, 0 for no ADFS boot sector, 1 for ok.
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*
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* Alloc : hda = whole drive
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* hda1 = ADFS partition on first drive.
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* hda2 = non-ADFS partition.
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*/
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2010-05-15 18:09:30 +00:00
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int adfspart_check_ADFS(struct parsed_partitions *state)
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2005-04-16 22:20:36 +00:00
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{
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unsigned long start_sect, nr_sects, sectscyl, heads;
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Sector sect;
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unsigned char *data;
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struct adfs_discrecord *dr;
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unsigned char id;
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int slot = 1;
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2010-05-15 18:09:30 +00:00
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data = read_part_sector(state, 6, §);
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2005-04-16 22:20:36 +00:00
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if (!data)
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return -1;
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dr = adfs_partition(state, "ADFS", data, 0, slot++);
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if (!dr) {
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put_dev_sector(sect);
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return 0;
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}
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heads = dr->heads + ((dr->lowsector >> 6) & 1);
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sectscyl = dr->secspertrack * heads;
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start_sect = ((data[0x1fe] << 8) + data[0x1fd]) * sectscyl;
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id = data[0x1fc] & 15;
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put_dev_sector(sect);
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/*
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* Work out start of non-adfs partition.
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*/
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2021-08-10 15:45:09 +00:00
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nr_sects = get_capacity(state->disk) - start_sect;
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2005-04-16 22:20:36 +00:00
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if (start_sect) {
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switch (id) {
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#ifdef CONFIG_ACORN_PARTITION_RISCIX
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case PARTITION_RISCIX_SCSI:
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case PARTITION_RISCIX_MFM:
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2010-05-15 18:09:30 +00:00
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slot = riscix_partition(state, start_sect, slot,
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nr_sects);
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2005-04-16 22:20:36 +00:00
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break;
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#endif
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case PARTITION_LINUX:
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2010-05-15 18:09:30 +00:00
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slot = linux_partition(state, start_sect, slot,
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nr_sects);
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2005-04-16 22:20:36 +00:00
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break;
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}
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}
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2010-08-11 01:03:14 +00:00
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strlcat(state->pp_buf, "\n", PAGE_SIZE);
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2005-04-16 22:20:36 +00:00
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return 1;
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}
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#endif
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#ifdef CONFIG_ACORN_PARTITION_ICS
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struct ics_part {
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__le32 start;
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__le32 size;
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};
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2010-05-15 18:09:30 +00:00
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static int adfspart_check_ICSLinux(struct parsed_partitions *state,
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unsigned long block)
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2005-04-16 22:20:36 +00:00
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{
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Sector sect;
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2010-05-15 18:09:30 +00:00
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unsigned char *data = read_part_sector(state, block, §);
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2005-04-16 22:20:36 +00:00
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int result = 0;
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if (data) {
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if (memcmp(data, "LinuxPart", 9) == 0)
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result = 1;
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put_dev_sector(sect);
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}
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return result;
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}
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/*
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* Check for a valid ICS partition using the checksum.
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*/
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static inline int valid_ics_sector(const unsigned char *data)
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{
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unsigned long sum;
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int i;
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for (i = 0, sum = 0x50617274; i < 508; i++)
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sum += data[i];
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sum -= le32_to_cpu(*(__le32 *)(&data[508]));
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return sum == 0;
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}
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/*
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* Purpose: allocate ICS partitions.
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* Params : hd - pointer to gendisk structure to store partition info.
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* dev - device number to access.
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* Returns: -1 on error, 0 for no ICS table, 1 for partitions ok.
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* Alloc : hda = whole drive
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|
|
* hda1 = ADFS partition 0 on first drive.
|
|
|
|
* hda2 = ADFS partition 1 on first drive.
|
|
|
|
* ..etc..
|
|
|
|
*/
|
2010-05-15 18:09:30 +00:00
|
|
|
int adfspart_check_ICS(struct parsed_partitions *state)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
const unsigned char *data;
|
|
|
|
const struct ics_part *p;
|
|
|
|
int slot;
|
|
|
|
Sector sect;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Try ICS style partitions - sector 0 contains partition info.
|
|
|
|
*/
|
2010-05-15 18:09:30 +00:00
|
|
|
data = read_part_sector(state, 0, §);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!data)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
if (!valid_ics_sector(data)) {
|
|
|
|
put_dev_sector(sect);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-08-11 01:03:14 +00:00
|
|
|
strlcat(state->pp_buf, " [ICS]", PAGE_SIZE);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
for (slot = 1, p = (const struct ics_part *)data; p->size; p++) {
|
|
|
|
u32 start = le32_to_cpu(p->start);
|
|
|
|
s32 size = le32_to_cpu(p->size); /* yes, it's signed. */
|
|
|
|
|
|
|
|
if (slot == state->limit)
|
|
|
|
break;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Negative sizes tell the RISC OS ICS driver to ignore
|
|
|
|
* this partition - in effect it says that this does not
|
|
|
|
* contain an ADFS filesystem.
|
|
|
|
*/
|
|
|
|
if (size < 0) {
|
|
|
|
size = -size;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Our own extension - We use the first sector
|
|
|
|
* of the partition to identify what type this
|
|
|
|
* partition is. We must not make this visible
|
|
|
|
* to the filesystem.
|
|
|
|
*/
|
2010-05-15 18:09:30 +00:00
|
|
|
if (size > 1 && adfspart_check_ICSLinux(state, start)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
start += 1;
|
|
|
|
size -= 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (size)
|
|
|
|
put_partition(state, slot++, start, size);
|
|
|
|
}
|
|
|
|
|
|
|
|
put_dev_sector(sect);
|
2010-08-11 01:03:14 +00:00
|
|
|
strlcat(state->pp_buf, "\n", PAGE_SIZE);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef CONFIG_ACORN_PARTITION_POWERTEC
|
|
|
|
struct ptec_part {
|
|
|
|
__le32 unused1;
|
|
|
|
__le32 unused2;
|
|
|
|
__le32 start;
|
|
|
|
__le32 size;
|
|
|
|
__le32 unused5;
|
|
|
|
char type[8];
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline int valid_ptec_sector(const unsigned char *data)
|
|
|
|
{
|
|
|
|
unsigned char checksum = 0x2a;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If it looks like a PC/BIOS partition, then it
|
|
|
|
* probably isn't PowerTec.
|
|
|
|
*/
|
|
|
|
if (data[510] == 0x55 && data[511] == 0xaa)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
for (i = 0; i < 511; i++)
|
|
|
|
checksum += data[i];
|
|
|
|
|
|
|
|
return checksum == data[511];
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Purpose: allocate ICS partitions.
|
|
|
|
* Params : hd - pointer to gendisk structure to store partition info.
|
|
|
|
* dev - device number to access.
|
|
|
|
* Returns: -1 on error, 0 for no ICS table, 1 for partitions ok.
|
|
|
|
* Alloc : hda = whole drive
|
|
|
|
* hda1 = ADFS partition 0 on first drive.
|
|
|
|
* hda2 = ADFS partition 1 on first drive.
|
|
|
|
* ..etc..
|
|
|
|
*/
|
2010-05-15 18:09:30 +00:00
|
|
|
int adfspart_check_POWERTEC(struct parsed_partitions *state)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
Sector sect;
|
|
|
|
const unsigned char *data;
|
|
|
|
const struct ptec_part *p;
|
|
|
|
int slot = 1;
|
|
|
|
int i;
|
|
|
|
|
2010-05-15 18:09:30 +00:00
|
|
|
data = read_part_sector(state, 0, §);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!data)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
if (!valid_ptec_sector(data)) {
|
|
|
|
put_dev_sector(sect);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-08-11 01:03:14 +00:00
|
|
|
strlcat(state->pp_buf, " [POWERTEC]", PAGE_SIZE);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
for (i = 0, p = (const struct ptec_part *)data; i < 12; i++, p++) {
|
|
|
|
u32 start = le32_to_cpu(p->start);
|
|
|
|
u32 size = le32_to_cpu(p->size);
|
|
|
|
|
|
|
|
if (size)
|
|
|
|
put_partition(state, slot++, start, size);
|
|
|
|
}
|
|
|
|
|
|
|
|
put_dev_sector(sect);
|
2010-08-11 01:03:14 +00:00
|
|
|
strlcat(state->pp_buf, "\n", PAGE_SIZE);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef CONFIG_ACORN_PARTITION_EESOX
|
|
|
|
struct eesox_part {
|
|
|
|
char magic[6];
|
|
|
|
char name[10];
|
|
|
|
__le32 start;
|
|
|
|
__le32 unused6;
|
|
|
|
__le32 unused7;
|
|
|
|
__le32 unused8;
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Guess who created this format?
|
|
|
|
*/
|
|
|
|
static const char eesox_name[] = {
|
|
|
|
'N', 'e', 'i', 'l', ' ',
|
|
|
|
'C', 'r', 'i', 't', 'c', 'h', 'e', 'l', 'l', ' ', ' '
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* EESOX SCSI partition format.
|
|
|
|
*
|
|
|
|
* This is a goddamned awful partition format. We don't seem to store
|
|
|
|
* the size of the partition in this table, only the start addresses.
|
|
|
|
*
|
|
|
|
* There are two possibilities where the size comes from:
|
|
|
|
* 1. The individual ADFS boot block entries that are placed on the disk.
|
|
|
|
* 2. The start address of the next entry.
|
|
|
|
*/
|
2010-05-15 18:09:30 +00:00
|
|
|
int adfspart_check_EESOX(struct parsed_partitions *state)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
Sector sect;
|
|
|
|
const unsigned char *data;
|
|
|
|
unsigned char buffer[256];
|
|
|
|
struct eesox_part *p;
|
|
|
|
sector_t start = 0;
|
|
|
|
int i, slot = 1;
|
|
|
|
|
2010-05-15 18:09:30 +00:00
|
|
|
data = read_part_sector(state, 7, §);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!data)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* "Decrypt" the partition table. God knows why...
|
|
|
|
*/
|
|
|
|
for (i = 0; i < 256; i++)
|
|
|
|
buffer[i] = data[i] ^ eesox_name[i & 15];
|
|
|
|
|
|
|
|
put_dev_sector(sect);
|
|
|
|
|
|
|
|
for (i = 0, p = (struct eesox_part *)buffer; i < 8; i++, p++) {
|
|
|
|
sector_t next;
|
|
|
|
|
|
|
|
if (memcmp(p->magic, "Eesox", 6))
|
|
|
|
break;
|
|
|
|
|
|
|
|
next = le32_to_cpu(p->start);
|
|
|
|
if (i)
|
|
|
|
put_partition(state, slot++, start, next - start);
|
|
|
|
start = next;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (i != 0) {
|
|
|
|
sector_t size;
|
|
|
|
|
2021-08-10 15:45:09 +00:00
|
|
|
size = get_capacity(state->disk);
|
2005-04-16 22:20:36 +00:00
|
|
|
put_partition(state, slot++, start, size - start);
|
2010-08-11 01:03:14 +00:00
|
|
|
strlcat(state->pp_buf, "\n", PAGE_SIZE);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return i ? 1 : 0;
|
|
|
|
}
|
|
|
|
#endif
|