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Diffstat (limited to 'sim/ppc/pk_disklabel.c')
| -rw-r--r-- | sim/ppc/pk_disklabel.c | 401 |
1 files changed, 0 insertions, 401 deletions
diff --git a/sim/ppc/pk_disklabel.c b/sim/ppc/pk_disklabel.c deleted file mode 100644 index 91dcf7ce562..00000000000 --- a/sim/ppc/pk_disklabel.c +++ /dev/null @@ -1,401 +0,0 @@ -/* This file is part of the program psim. - - Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au> - - 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. - - */ - - -#ifndef _PK_DISKLABEL_C_ -#define _PK_DISKLABEL_C_ - -#ifndef STATIC_INLINE_PK_DISKLABEL -#define STATIC_INLINE_PK_DISKLABEL STATIC_INLINE -#endif - -#include "device_table.h" - -#include "pk.h" - -#ifdef HAVE_STDLIB_H -#include <stdlib.h> -#endif - - - -/* PACKAGE - - disk-label - all knowing disk I/O package - - DESCRIPTION - - The disk-label package provides a generic interface to disk - devices. It uses the arguments specified when an instance is being - created to determine if the raw disk, a partition, or a file within - a partition should be opened. - - An instance create call to disk-label could result, for instance, - in the opening of a DOS file system contained within a dos - partition contained within a physical disk. - - */ - -/* taken from bfd/ppcboot.c by Michael Meissner */ - -/* PPCbug location structure */ -typedef struct ppcboot_location { - unsigned8 ind; - unsigned8 head; - unsigned8 sector; - unsigned8 cylinder; -} ppcboot_location_t; - -/* PPCbug partition table layout */ -typedef struct ppcboot_partition { - ppcboot_location_t partition_begin; /* partition begin */ - ppcboot_location_t partition_end; /* partition end */ - unsigned8 sector_begin[4]; /* 32-bit start RBA (zero-based), little endian */ - unsigned8 sector_length[4]; /* 32-bit RBA count (one-based), little endian */ -} ppcboot_partition_t; - -#if 0 -/* PPCbug boot layout. */ -typedef struct ppcboot_hdr { - unsigned8 pc_compatibility[446]; /* x86 instruction field */ - ppcboot_partition_t partition[4]; /* partition information */ - unsigned8 signature[2]; /* 0x55 and 0xaa */ - unsigned8 entry_offset[4]; /* entry point offset, little endian */ - unsigned8 length[4]; /* load image length, little endian */ - unsigned8 flags; /* flag field */ - unsigned8 os_id; /* OS_ID */ - char partition_name[32]; /* partition name */ - unsigned8 reserved1[470]; /* reserved */ -} ppcboot_hdr_t; -#endif - - -typedef struct _disklabel { - device_instance *parent; - device_instance *raw_disk; - unsigned_word pos; - unsigned_word sector_begin; - unsigned_word sector_length; -} disklabel; - - -static unsigned_word -sector2uw(unsigned8 s[4]) -{ - return ((s[3] << 24) - + (s[2] << 16) - + (s[1] << 8) - + (s[0] << 0)); -} - - -static void -disklabel_delete(device_instance *instance) -{ - disklabel *label = device_instance_data(instance); - device_instance_delete(label->raw_disk); - zfree(label); -} - - -static int -disklabel_read(device_instance *instance, - void *buf, - unsigned_word len) -{ - disklabel *label = device_instance_data(instance); - int nr_read; - if (label->pos + len > label->sector_length) - len = label->sector_length - label->pos; - if (device_instance_seek(label->raw_disk, 0, - label->sector_begin + label->pos) < 0) - return -1; - nr_read = device_instance_read(label->raw_disk, buf, len); - if (nr_read > 0) - label->pos += nr_read; - return nr_read; -} - -static int -disklabel_write(device_instance *instance, - const void *buf, - unsigned_word len) -{ - disklabel *label = device_instance_data(instance); - int nr_written; - if (label->pos + len > label->sector_length) - len = label->sector_length - label->pos; - if (device_instance_seek(label->raw_disk, 0, - label->sector_begin + label->pos) < 0) - return -1; - nr_written = device_instance_write(label->raw_disk, buf, len); - if (nr_written > 0) - label->pos += nr_written; - return nr_written; -} - -static int -disklabel_seek(device_instance *instance, - unsigned_word pos_hi, - unsigned_word pos_lo) -{ - disklabel *label = device_instance_data(instance); - if (pos_lo >= label->sector_length || pos_hi != 0) - return -1; - label->pos = pos_lo; - return 0; -} - - -static const device_instance_callbacks package_disklabel_callbacks = { - disklabel_delete, - disklabel_read, - disklabel_write, - disklabel_seek, -}; - -/* Reconize different types of boot block */ - -static int -block0_is_bpb(const unsigned8 block[]) -{ - const char ebdic_ibma[] = { 0xc9, 0xc2, 0xd4, 0xc1 }; - /* ref PowerPC Microprocessor CHRP bindings 1.2b - page 47 */ - /* can't start with IBMA */ - if (memcmp(block, ebdic_ibma, sizeof(ebdic_ibma)) == 0) - return 0; - /* must have LE 0xAA55 signature at offset 510 */ - if (block[511] != 0xAA && block[510] != 0x55) - return 0; - /* valid 16 bit LE bytes per sector - 256, 512, 1024 */ - if (block[11] != 0 - || (block[12] != 1 && block[12] != 2 && block[12] != 4)) - return 0; - /* nr fats is 1 or 2 */ - if (block[16] != 1 && block[16] != 2) - return 0; - return 1; -} - - -/* Verify that the device contains an ISO-9660 File system */ - -static int -is_iso9660(device_instance *raw_disk) -{ - /* ref PowerPC Microprocessor CHRP bindings 1.2b - page 47 */ - unsigned8 block[512]; - if (device_instance_seek(raw_disk, 0, 512 * 64) < 0) - return 0; - if (device_instance_read(raw_disk, block, sizeof(block)) != sizeof(block)) - return 0; - if (block[0] == 0x01 - && block[1] == 'C' - && block[2] == 'D' - && block[3] == '0' - && block[4] == '0' - && block[5] == '1') - return 1; - return 0; -} - - -/* Verify that the disk block contains a valid DOS partition table. - While we're at it have a look around for active partitions etc. - - Return 0: invalid - Return 1..4: valid, value returned is the first active partition - Return -1: no active partition */ - -static int -block0_is_fdisk(const unsigned8 block[]) -{ - const int partition_type_fields[] = { 0, 0x1c2, 0x1d2, 0x1e2, 0x1f2 }; - const int partition_active_fields[] = { 0, 0x1be, 0x1ce, 0x1de, 0xee }; - int partition; - int active = -1; - /* ref PowerPC Microprocessor CHRP bindings 1.2b - page 47 */ - /* must have LE 0xAA55 signature at offset 510 */ - if (block[511/*0x1ff*/] != 0xAA && block[510/*0x1fe*/] != 0x55) - return 0; - /* must contain valid partition types */ - for (partition = 1; partition <= 4 && active != 0; partition++) { - int partition_type = block[partition_type_fields[partition]]; - int is_active = block[partition_active_fields[partition]] == 0x80; - const char *type; - switch (partition_type) { - case 0x00: - type = "UNUSED"; - break; - case 0x01: - type = "FAT 12 File system"; - break; - case 0x04: - type = "FAT 16 File system"; - break; - case 0x05: - case 0x06: - type = "rejected - extended/chained partition not supported"; - active = 0; - break; - case 0x41: - type = "Single program image"; - break; - case 0x82: - type = "Solaris?"; - break; - case 0x96: - type = "ISO 9660 File system"; - break; - default: - type = "rejected - unknown type"; - active = 0; - break; - } - PTRACE(disklabel, ("partition %d of type 0x%02x - %s%s\n", - partition, - partition_type, - type, - is_active && active != 0 ? " (active)" : "")); - if (partition_type != 0 && is_active && active < 0) - active = partition; - } - return active; -} - - -/* Verify that block0 corresponds to a MAC disk */ - -static int -block0_is_mac_disk(const unsigned8 block[]) -{ - /* ref PowerPC Microprocessor CHRP bindings 1.2b - page 47 */ - /* signature - BEx4552 at offset 0 */ - if (block[0] != 0x45 || block[1] != 0x52) - return 0; - return 1; -} - - -/* Open a logical disk/file */ - -device_instance * -pk_disklabel_create_instance(device_instance *raw_disk, - const char *args) -{ - int partition; - char *filename; - - /* parse the arguments */ - if (args == NULL) { - partition = 0; - filename = NULL; - } - else { - partition = strtoul((char*)args, &filename, 0); - if (filename == args) - partition = -1; /* not specified */ - if (*filename == ',') - filename++; - if (*filename == '\0') - filename = NULL; /* easier */ - } - - if (partition == 0) { - /* select the raw disk */ - return raw_disk; - } - else { - unsigned8 boot_block[512]; - /* get the boot block for examination */ - if (device_instance_seek(raw_disk, 0, 0) < 0) - device_error(device_instance_device(raw_disk), - "Problem seeking on raw disk"); - if (device_instance_read(raw_disk, &boot_block, sizeof(boot_block)) - != sizeof(boot_block)) - device_error(device_instance_device(raw_disk), "Problem reading boot block"); - - if (partition < 0) { - /* select the active partition */ - if (block0_is_bpb(boot_block)) { - device_error(device_instance_device(raw_disk), "Unimplemented active BPB"); - } - else if (block0_is_fdisk(boot_block)) { - int active = block0_is_fdisk(boot_block); - device_error(device_instance_device(raw_disk), "Unimplemented active FDISK (%d)", - active); - } - else if (is_iso9660(raw_disk)) { - device_error(device_instance_device(raw_disk), "Unimplemented active ISO9660"); - } - else if (block0_is_mac_disk(boot_block)) { - device_error(device_instance_device(raw_disk), "Unimplemented active MAC DISK"); - } - else { - device_error(device_instance_device(raw_disk), "Unreconized bootblock"); - } - } - else { - /* select the specified disk partition */ - if (block0_is_bpb(boot_block)) { - device_error(device_instance_device(raw_disk), "Unimplemented BPB"); - } - else if (block0_is_fdisk(boot_block)) { - /* return an instance */ - ppcboot_partition_t *partition_table = (ppcboot_partition_t*) &boot_block[446]; - ppcboot_partition_t *partition_entry; - disklabel *label; - if (partition > 4) - device_error(device_instance_device(raw_disk), - "Only FDISK partitions 1..4 supported"); - partition_entry = &partition_table[partition - 1]; - label = ZALLOC(disklabel); - label->raw_disk = raw_disk; - label->pos = 0; - label->sector_begin = 512 * sector2uw(partition_entry->sector_begin); - label->sector_length = 512 * sector2uw(partition_entry->sector_length); - PTRACE(disklabel, ("partition %ld, sector-begin %ld, length %ld\n", - (long)partition, - (long)label->sector_begin, - (long)label->sector_length)); - if (filename != NULL) - device_error(device_instance_device(raw_disk), - "FDISK file names not yet supported"); - return device_create_instance_from(NULL, raw_disk, - label, - NULL, args, - &package_disklabel_callbacks); - } - else if (block0_is_mac_disk(boot_block)) { - device_error(device_instance_device(raw_disk), "Unimplemented MAC DISK"); - } - else { - device_error(device_instance_device(raw_disk), - "Unreconized bootblock"); - } - } - } - - return NULL; -} - - -#endif /* _PK_DISKLABEL_C_ */ - |