* Patch by Thomas Frieden, 13 Nov 2002:

  Add code for AmigaOne board
  (preliminary merge to U-Boot, still WIP)

* Patch by Jon Diekema, 12 Nov 2002:
  - Adding URL for IEEE OUI lookup
  - Making the autoboot #defines dependent on CONFIG_AUTOBOOT_KEYED
    being defined.
  - In the CONFIG_EXTRA_ENV_SETTINGS #define, the root-on-initrd and
    root-on-nfs macros are designed to switch how the default boot
    method gets defined.

1 files changed, 399 insertions, 0 deletions

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