diff options
Diffstat (limited to 'disk')
| -rw-r--r-- | disk/Makefile | 2 | ||||
| -rw-r--r-- | disk/part.c | 28 | ||||
| -rw-r--r-- | disk/part_amiga.c | 399 | ||||
| -rw-r--r-- | disk/part_amiga.h | 157 | ||||
| -rw-r--r-- | disk/part_dos.h | 6 | ||||
| -rw-r--r-- | disk/part_iso.c | 1 | ||||
| -rw-r--r-- | disk/part_mac.h | 3 |
7 files changed, 594 insertions, 2 deletions
diff --git a/disk/Makefile b/disk/Makefile index 7b80174..39677f1 100644 --- a/disk/Makefile +++ b/disk/Makefile @@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk LIB = libdisk.a -OBJS = part.o part_mac.o part_dos.o part_iso.o +OBJS = part.o part_mac.o part_dos.o part_iso.o part_amiga.o all: $(LIB) diff --git a/disk/part.c b/disk/part.c index 99fe0db..70511ca 100644 --- a/disk/part.c +++ b/disk/part.c @@ -106,7 +106,8 @@ void dev_print (block_dev_desc_t *dev_desc) #if defined(CONFIG_MAC_PARTITION) || \ defined(CONFIG_DOS_PARTITION) || \ - defined(CONFIG_ISO_PARTITION) + defined(CONFIG_ISO_PARTITION) || \ + defined(CONFIG_AMIGA_PARTITION) void init_part (block_dev_desc_t * dev_desc) { @@ -130,6 +131,13 @@ void init_part (block_dev_desc_t * dev_desc) return; } #endif + +#ifdef CONFIG_AMIGA_PARTITION + if (test_part_amiga(dev_desc) == 0) { + dev_desc->part_type = PART_TYPE_AMIGA; + return; + } +#endif } @@ -162,6 +170,16 @@ int get_partition_info (block_dev_desc_t *dev_desc, int part, disk_partition_t * } break; #endif + +#ifdef CONFIG_AMIGA_PARTITION + case PART_TYPE_AMIGA: + if (get_partition_info_amiga(dev_desc, part, info) == 0) + { + PRINTF ("## Valid Amiga partition found ##\n"); + return (0); + } + break; +#endif default: break; } @@ -215,6 +233,14 @@ void print_part (block_dev_desc_t * dev_desc) print_part_iso (dev_desc); return; #endif + +#ifdef CONFIG_AMIGA_PARTITION + case PART_TYPE_AMIGA: + PRINTF ("## Testing for a valid Amiga partition ##\n"); + print_part_header ("AMIGA", dev_desc); + print_part_amiga (dev_desc); + return; +#endif } puts ("## Unknown partition table\n"); } diff --git a/disk/part_amiga.c b/disk/part_amiga.c new file mode 100644 index 0000000..aafbcd8 --- /dev/null +++ b/disk/part_amiga.c @@ -0,0 +1,399 @@ +/* + * (C) Copyright 2001 + * Hans-Joerg Frieden, Hyperion Entertainment + * Hans-JoergF@hyperion-entertainment.com + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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 + */ +#include <common.h> +#include <command.h> +#include <ide.h> +#include <cmd_disk.h> +#include "part_amiga.h" + +#if ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_AMIGA_PARTITION) + +#undef AMIGA_DEBUG + +#ifdef AMIGA_DEBUG +#define PRINTF(fmt, args...) printf(fmt ,##args) +#else +#define PRINTF(fmt, args...) +#endif + +struct block_header +{ + u32 id; + u32 summed_longs; + s32 chk_sum; +}; + +static unsigned char block_buffer[DEFAULT_SECTOR_SIZE]; +static struct rigid_disk_block rdb = {0}; +static struct bootcode_block bootcode = {0}; + +/* + * Copy a bcpl to a c string + */ +static void bcpl_strcpy(char *to, char *from) +{ + int len = *from++; + + while (len) + { + *to++ = *from++; + len--; + } + *to = 0; +} + +/* + * Print a BCPL String. BCPL strings start with a byte with the length + * of the string, and don't contain a terminating nul character + */ +static void bstr_print(char *string) +{ + int len = *string++; + char buffer[256]; + int i; + + i = 0; + while (len) + { + buffer[i++] = *string++; + len--; + } + + buffer[i] = 0; + printf("%-10s", buffer); +} + +/* + * Sum a block. The checksum of a block must end up at zero + * to be valid. The chk_sum field is selected so that adding + * it yields zero. + */ +int sum_block(struct block_header *header) +{ + s32 *block = (s32 *)header; + u32 i; + s32 sum = 0; + + for (i = 0; i < header->summed_longs; i++) + sum += *block++; + + return (sum != 0); +} + +/* + * Print an AmigaOS disk type. Disk types are a four-byte identifier + * describing the file system. They are usually written as a three-letter + * word followed by a backslash and a version number. For example, + * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem. + * DOS\1 is FFS. + */ +static void print_disk_type(u32 disk_type) +{ + char buffer[6]; + buffer[0] = (disk_type & 0xFF000000)>>24; + buffer[1] = (disk_type & 0x00FF0000)>>16; + buffer[2] = (disk_type & 0x0000FF00)>>8; + buffer[3] = '\\'; + buffer[4] = (disk_type & 0x000000FF) + '0'; + buffer[5] = 0; + printf("%s", buffer); +} + +/* + * Print the info contained within the given partition block + */ +static void print_part_info(struct partition_block *p) +{ + struct amiga_part_geometry *g; + + g = (struct amiga_part_geometry *)&(p->environment); + + bstr_print(p->drive_name); + printf("%6d\t%6d\t", + g->low_cyl * g->block_per_track * g->surfaces , + (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1); + print_disk_type(g->dos_type); + printf("\t%5d\n", g->boot_priority); +} + +/* + * Search for the Rigid Disk Block. The rigid disk block is required + * to be within the first 16 blocks of a drive, needs to have + * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid + * sum-to-zero checksum + */ +struct rigid_disk_block *get_rdisk(block_dev_desc_t *dev_desc) +{ + int i; + int limit; + char *s; + + s = getenv("amiga_scanlimit"); + if (s) + limit = atoi(s); + else + limit = AMIGA_BLOCK_LIMIT; + + for (i=0; i<limit; i++) + { + ulong res = dev_desc->block_read(dev_desc->dev, i, 1, + (ulong *)block_buffer); + if (res == 1) + { + struct rigid_disk_block *trdb = (struct rigid_disk_block *)block_buffer; + if (trdb->id == AMIGA_ID_RDISK) + { + PRINTF("Rigid disk block suspect at %d, checking checksum\n",i); + if (sum_block((struct block_header *)block_buffer) == 0) + { + PRINTF("FOUND\n"); + memcpy(&rdb, trdb, sizeof(struct rigid_disk_block)); + return (struct rigid_disk_block *)&rdb; + } + } + } + } + PRINTF("Done scanning, no RDB found\n"); + return NULL; +} + +/* + * Search for boot code + * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the + * Ridgid disk block + */ + +struct bootcode_block *get_bootcode(block_dev_desc_t *dev_desc) +{ + int i; + int limit; + char *s; + + s = getenv("amiga_scanlimit"); + if (s) + limit = atoi(s); + else + limit = AMIGA_BLOCK_LIMIT; + + PRINTF("Scanning for BOOT from 0 to %d\n", limit); + + for (i = 0; i < limit; i++) + { + ulong res = dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)block_buffer); + if (res == 1) + { + struct bootcode_block *boot = (struct bootcode_block *)block_buffer; + if (boot->id == AMIGA_ID_BOOT) + { + PRINTF("BOOT block at %d, checking checksum\n", i); + if (sum_block((struct block_header *)block_buffer) == 0) + { + PRINTF("Found valid bootcode block\n"); + memcpy(&bootcode, boot, sizeof(struct bootcode_block)); + return &bootcode; + } + } + } + } + + PRINTF("No boot code found on disk\n"); + return 0; +} + +/* + * Test if the given partition has an Amiga partition table/Rigid + * Disk block + */ +int test_part_amiga(block_dev_desc_t *dev_desc) +{ + struct rigid_disk_block *rdb; + struct bootcode_block *bootcode; + + PRINTF("test_part_amiga: Testing for an Amiga RDB partition\n"); + + rdb = get_rdisk(dev_desc); + if (rdb) + { + bootcode = get_bootcode(dev_desc); + if (bootcode) + PRINTF("test_part_amiga: bootable Amiga disk\n"); + else + PRINTF("test_part_amiga: non-bootable Amiga disk\n"); + + return 0; + } + else + { + PRINTF("test_part_amiga: no RDB found\n"); + return -1; + } + +} + +/* + * Find partition number partnum on the given drive. + */ +static struct partition_block *find_partition(block_dev_desc_t *dev_desc, int partnum) +{ + struct rigid_disk_block *rdb; + struct partition_block *p; + u32 block; + + PRINTF("Trying to find partition block %d\n", partnum); + rdb = get_rdisk(dev_desc); + if (!rdb) + { + PRINTF("find_partition: no rdb found\n"); + return NULL; + } + + PRINTF("find_partition: Scanning partition list\n"); + + block = rdb->partition_list; + PRINTF("find_partition: partition list at 0x%x\n", block); + + while (block != 0xFFFFFFFF) + { + ulong res = dev_desc->block_read(dev_desc->dev, block, 1, + (ulong *)block_buffer); + if (res == 1) + { + p = (struct partition_block *)block_buffer; + if (p->id == AMIGA_ID_PART) + { + PRINTF("PART block suspect at 0x%x, checking checksum\n",block); + if (sum_block((struct block_header *)p) == 0) + { + if (partnum == 0) break; + else + { + partnum--; + block = p->next; + } + } + } else block = 0xFFFFFFFF; + } else block = 0xFFFFFFFF; + } + + if (block == 0xFFFFFFFF) + { + PRINTF("PART block not found\n"); + return NULL; + } + + return (struct partition_block *)block_buffer; +} + +/* + * Get info about a partition + */ +int get_partition_info_amiga (block_dev_desc_t *dev_desc, int part, disk_partition_t *info) +{ + struct partition_block *p = find_partition(dev_desc, part-1); + struct amiga_part_geometry *g; + u32 disk_type; + + if (!p) return -1; + + g = (struct amiga_part_geometry *)&(p->environment); + info->start = g->low_cyl * g->block_per_track * g->surfaces; + info->size = (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1; + info->blksz = rdb.block_bytes; + bcpl_strcpy(info->name, p->drive_name); + + + disk_type = g->dos_type; + + info->type[0] = (disk_type & 0xFF000000)>>24; + info->type[1] = (disk_type & 0x00FF0000)>>16; + info->type[2] = (disk_type & 0x0000FF00)>>8; + info->type[3] = '\\'; + info->type[4] = (disk_type & 0x000000FF) + '0'; + info->type[5] = 0; + + return 0; +} + +void print_part_amiga (block_dev_desc_t *dev_desc) +{ + struct rigid_disk_block *rdb; + struct bootcode_block *boot; + struct partition_block *p; + u32 block; + int i = 1; + + rdb = get_rdisk(dev_desc); + if (!rdb) + { + PRINTF("print_part_amiga: no rdb found\n"); + return; + } + + PRINTF("print_part_amiga: Scanning partition list\n"); + + block = rdb->partition_list; + PRINTF("print_part_amiga: partition list at 0x%x\n", block); + + printf("Summary: DiskBlockSize: %d\n" + " Cylinders : %d\n" + " Sectors/Track: %d\n" + " Heads : %d\n\n", + rdb->block_bytes, rdb->cylinders, rdb->sectors, + rdb->heads); + + printf(" First Num. \n" + "Nr. Part. Name Block Block Type Boot Priority\n"); + + while (block != 0xFFFFFFFF) + { + ulong res; + + PRINTF("Trying to load block #0x%X\n", block); + + res = dev_desc->block_read(dev_desc->dev, block, 1, + (ulong *)block_buffer); + if (res == 1) + { + p = (struct partition_block *)block_buffer; + if (p->id == AMIGA_ID_PART) + { + PRINTF("PART block suspect at 0x%x, checking checksum\n",block); + if (sum_block((struct block_header *)p) == 0) + { + printf("%-4d ", i); i++; + print_part_info(p); + block = p->next; + } + } else block = 0xFFFFFFFF; + } else block = 0xFFFFFFFF; + } + + boot = get_bootcode(dev_desc); + if (boot) + { + printf("Disk is bootable\n"); + } +} + +#endif diff --git a/disk/part_amiga.h b/disk/part_amiga.h new file mode 100644 index 0000000..9e59be9 --- /dev/null +++ b/disk/part_amiga.h @@ -0,0 +1,157 @@ +/* + * (C) Copyright 2000 + * Hans-Joerg Frieden, Hyperion Entertainment + * Hans-JoergF@hyperion-entertainment.com + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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 _DISK_PART_AMIGA_H +#define _DISK_PART_AMIGA_H +#include <common.h> + +#ifdef CONFIG_ISO_PARTITION +/* Make the buffers bigger if ISO partition support is enabled -- CD-ROMS + have 2048 byte blocks */ +#define DEFAULT_SECTOR_SIZE 2048 +#else +#define DEFAULT_SECTOR_SIZE 512 +#endif + + +#define AMIGA_BLOCK_LIMIT 16 + +/* + * Amiga disks have a very open structure. The head for the partition table information + * is stored somewhere within the first 16 blocks on disk, and is called the + * "RigidDiskBlock". + */ + +struct rigid_disk_block +{ + u32 id; + u32 summed_longs; + s32 chk_sum; + u32 host_id; + u32 block_bytes; + u32 flags; + u32 bad_block_list; + u32 partition_list; + u32 file_sys_header_list; + u32 drive_init; + u32 bootcode_block; + u32 reserved_1[5]; + + /* Physical drive geometry */ + u32 cylinders; + u32 sectors; + u32 heads; + u32 interleave; + u32 park; + u32 reserved_2[3]; + u32 write_pre_comp; + u32 reduced_write; + u32 step_rate; + u32 reserved_3[5]; + + /* logical drive geometry */ + u32 rdb_blocks_lo; + u32 rdb_blocks_hi; + u32 lo_cylinder; + u32 hi_cylinder; + u32 cyl_blocks; + u32 auto_park_seconds; + u32 high_rdsk_block; + u32 reserved_4; + + char disk_vendor[8]; + char disk_product[16]; + char disk_revision[4]; + char controller_vendor[8]; + char controller_product[16]; + char controller_revision[4]; + + u32 reserved_5[10]; +}; + +/* + * Each partition on this drive is defined by such a block + */ + +struct partition_block +{ + u32 id; + u32 summed_longs; + s32 chk_sum; + u32 host_id; + u32 next; + u32 flags; + u32 reserved_1[2]; + u32 dev_flags; + char drive_name[32]; + u32 reserved_2[15]; + u32 environment[17]; + u32 reserved_3[15]; +}; + +struct bootcode_block +{ + u32 id; + u32 summed_longs; + s32 chk_sum; + u32 host_id; + u32 next; + u32 load_data[123]; +}; + + +#define AMIGA_ID_RDISK 0x5244534B +#define AMIGA_ID_PART 0x50415254 +#define AMIGA_ID_BOOT 0x424f4f54 + +/* + * The environment array in the partition block + * describes the partition + */ + +struct amiga_part_geometry +{ + u32 table_size; + u32 size_blocks; + u32 unused1; + u32 surfaces; + u32 sector_per_block; + u32 block_per_track; + u32 reserved; + u32 prealloc; + u32 interleave; + u32 low_cyl; + u32 high_cyl; + u32 num_buffers; + u32 buf_mem_type; + u32 max_transfer; + u32 mask; + s32 boot_priority; + u32 dos_type; + u32 baud; + u32 control; + u32 boot_blocks; +}; + +#endif /* _DISK_PART_AMIGA_H_ */ diff --git a/disk/part_dos.h b/disk/part_dos.h index 1a5c377..cc3fa81 100644 --- a/disk/part_dos.h +++ b/disk/part_dos.h @@ -25,7 +25,13 @@ #define _DISK_PART_DOS_H +#ifdef CONFIG_ISO_PARTITION +/* Make the buffers bigger if ISO partition support is enabled -- CD-ROMS + have 2048 byte blocks */ +#define DEFAULT_SECTOR_SIZE 2048 +#else #define DEFAULT_SECTOR_SIZE 512 +#endif #define DOS_PART_TBL_OFFSET 0x1be #define DOS_PART_MAGIC_OFFSET 0x1fe diff --git a/disk/part_iso.c b/disk/part_iso.c index a98539d..7225927 100644 --- a/disk/part_iso.c +++ b/disk/part_iso.c @@ -97,6 +97,7 @@ int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_ info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */ PRINTF(" Lastsect:%08lx\n",lastsect); for(i=blkaddr;i<lastsect;i++) { + PRINTF("Reading block %d\n", i); if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1) return (-1); if(ppr->desctype==0x00) diff --git a/disk/part_mac.h b/disk/part_mac.h index 0340fe8..fb1edac 100644 --- a/disk/part_mac.h +++ b/disk/part_mac.h @@ -89,6 +89,9 @@ typedef struct mac_partition { __u32 boot_cksum; /* boot code checksum */ uchar processor[16]; /* Type of Processor */ __u16 part_pad[188]; /* reserved */ +#ifdef CONFIG_ISO_PARTITION + uchar iso_dummy[2048];/* Reservere enough room for an ISO partition block to fit */ +#endif } mac_partition_t; #define MAC_STATUS_BOOTABLE 8 /* partition is bootable */ |