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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /sim/ppc/pk_disklabel.c
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
Diffstat (limited to 'sim/ppc/pk_disklabel.c')
-rw-r--r--sim/ppc/pk_disklabel.c335
1 files changed, 0 insertions, 335 deletions
diff --git a/sim/ppc/pk_disklabel.c b/sim/ppc/pk_disklabel.c
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--- a/sim/ppc/pk_disklabel.c
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@@ -1,335 +0,0 @@
-/* This file is part of the program psim.
-
- Copyright (C) 1994-1996, 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
-block_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;
-}
-
-/* is_iso9660() later ... */
-
-static int
-block_is_fdisk(const unsigned8 block[])
-{
- const int partition_type_fields[] = { 0x1c2, 0x1d2, 0x1e2, 0x1f2, 0 };
- int partition;
- /* ref PowerPC Microprocessor CHRP bindings 1.2b - page 47 */
- /* must have LE 0xAA55 signature at offset 510 */
- if (block[511] != 0xAA && block[510] != 0x55)
- return 0;
- /* must contain valid partition types */
- for (partition = 0;
- partition_type_fields[partition] != 0;
- partition++) {
- switch (block[partition_type_fields[partition]]) {
- case 4: case 0x41: case 0x96:
- break;
- case 5: case 6:
- PTRACE(disklabel, ("extended partition types not supported\n"));
- return 0;
- case 0x82:
- PTRACE(disklabel, ("warning - partition %d of type 0x82 - Solaris?\n", partition));
- break;
- case 0x1:
- PTRACE(disklabel, ("warning - partition %d of type 1 - DOS12\n", partition));
- break;
- case 0:
- break;
- default:
- PTRACE(disklabel, ("rejecting partition %d of type 0x%x\n", partition,
- block[partition_type_fields[partition]]));
- return 0;
- }
- }
- return 1;
-}
-
-static int
-block_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;
- unsigned8 boot_block[512];
-
- /* 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 (device_instance_seek(raw_disk, 0, 0) < 0)
- device_error(device_instance_device(raw_disk),
- "Problem seeking on raw disk\n");
-
- if (partition < 0) {
- /* select the active partition */
- if (device_instance_read(raw_disk, &boot_block, sizeof(boot_block))
- != sizeof(boot_block))
- return raw_disk;
- device_error(device_instance_device(raw_disk),
- "selection of the active partition unimplemented\n");
- return (device_instance *)0; /* silence warnings */
- }
- else if (partition == 0) {
- /* select the raw disk */
- return raw_disk;
- }
- else {
- /* select the specified disk partition */
- /* read in the boot record */
- if (device_instance_read(raw_disk, &boot_block, sizeof(boot_block))
- != sizeof(boot_block))
- return raw_disk;
- if (block_is_bpb(boot_block)) {
- device_error(device_instance_device(raw_disk), "Unimplemented\n");
- }
- else if (block_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 > 3)
- device_error(device_instance_device(raw_disk),
- "Invalid fdisk partition number %d\n", partition);
- 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),
- "File names not yet supported\n");
- return device_create_instance_from(NULL, raw_disk,
- label,
- NULL, args,
- &package_disklabel_callbacks);
- }
- else if (block_is_mac_disk(boot_block)) {
- device_error(device_instance_device(raw_disk), "Unimplemented\n");
- }
- else {
- device_error(device_instance_device(raw_disk),
- "Unreconized bootblock\n");
- }
- return raw_disk;
- }
-
-}
-
-
-#endif /* _PK_DISKLABEL_C_ */
-