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-rw-r--r--grub-core/partmap/sun.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/grub-core/partmap/sun.c b/grub-core/partmap/sun.c
new file mode 100644
index 0000000..c7ef681
--- /dev/null
+++ b/grub-core/partmap/sun.c
@@ -0,0 +1,151 @@
+/* sun.c - Read SUN style partition tables. */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2002,2005,2006,2007 Free Software Foundation, Inc.
+ *
+ * GRUB 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/partition.h>
+#include <grub/disk.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/dl.h>
+#include <grub/symbol.h>
+#include <grub/types.h>
+#include <grub/err.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#define GRUB_PARTMAP_SUN_MAGIC 0xDABE
+#define GRUB_PARTMAP_SUN_MAX_PARTS 8
+#define GRUB_PARTMAP_SUN_WHOLE_DISK_ID 0x05
+
+struct grub_sun_partition_info
+{
+ grub_uint8_t spare1;
+ grub_uint8_t id;
+ grub_uint8_t spare2;
+ grub_uint8_t flags;
+} __attribute__ ((packed));
+
+struct grub_sun_partition_descriptor
+{
+ grub_uint32_t start_cylinder;
+ grub_uint32_t num_sectors;
+} __attribute__ ((packed));
+
+struct grub_sun_block
+{
+ grub_uint8_t info[128]; /* Informative text string. */
+ grub_uint8_t spare0[14];
+ struct grub_sun_partition_info infos[8];
+ grub_uint8_t spare1[246]; /* Boot information etc. */
+ grub_uint16_t rspeed; /* Disk rotational speed. */
+ grub_uint16_t pcylcount; /* Physical cylinder count. */
+ grub_uint16_t sparecyl; /* extra sects per cylinder. */
+ grub_uint8_t spare2[4]; /* More magic... */
+ grub_uint16_t ilfact; /* Interleave factor. */
+ grub_uint16_t ncyl; /* Data cylinder count. */
+ grub_uint16_t nacyl; /* Alt. cylinder count. */
+ grub_uint16_t ntrks; /* Tracks per cylinder. */
+ grub_uint16_t nsect; /* Sectors per track. */
+ grub_uint8_t spare3[4]; /* Even more magic... */
+ struct grub_sun_partition_descriptor partitions[8];
+ grub_uint16_t magic; /* Magic number. */
+ grub_uint16_t csum; /* Label xor'd checksum. */
+} __attribute__ ((packed));
+
+static struct grub_partition_map grub_sun_partition_map;
+
+/* Verify checksum (true=ok). */
+static int
+grub_sun_is_valid (struct grub_sun_block *label)
+{
+ grub_uint16_t *pos;
+ grub_uint16_t sum = 0;
+
+ for (pos = (grub_uint16_t *) label;
+ pos < (grub_uint16_t *) (label + 1);
+ pos++)
+ sum ^= *pos;
+
+ return ! sum;
+}
+
+static grub_err_t
+sun_partition_map_iterate (grub_disk_t disk,
+ int (*hook) (grub_disk_t disk,
+ const grub_partition_t partition))
+{
+ struct grub_partition p;
+ struct grub_sun_block block;
+ int partnum;
+ grub_err_t err;
+
+ p.partmap = &grub_sun_partition_map;
+ err = grub_disk_read (disk, 0, 0, sizeof (struct grub_sun_block),
+ &block);
+ if (err)
+ return err;
+
+ if (GRUB_PARTMAP_SUN_MAGIC != grub_be_to_cpu16 (block.magic))
+ return grub_error (GRUB_ERR_BAD_PART_TABLE, "not a sun partition table");
+
+ if (! grub_sun_is_valid (&block))
+ return grub_error (GRUB_ERR_BAD_PART_TABLE, "invalid checksum");
+
+ /* Maybe another error value would be better, because partition
+ table _is_ recognized but invalid. */
+ for (partnum = 0; partnum < GRUB_PARTMAP_SUN_MAX_PARTS; partnum++)
+ {
+ struct grub_sun_partition_descriptor *desc;
+
+ if (block.infos[partnum].id == 0
+ || block.infos[partnum].id == GRUB_PARTMAP_SUN_WHOLE_DISK_ID)
+ continue;
+
+ desc = &block.partitions[partnum];
+ p.start = ((grub_uint64_t) grub_be_to_cpu32 (desc->start_cylinder)
+ * grub_be_to_cpu16 (block.ntrks)
+ * grub_be_to_cpu16 (block.nsect));
+ p.len = grub_be_to_cpu32 (desc->num_sectors);
+ p.number = p.index = partnum;
+ if (p.len)
+ {
+ if (hook (disk, &p))
+ partnum = GRUB_PARTMAP_SUN_MAX_PARTS;
+ }
+ }
+
+ return grub_errno;
+}
+
+/* Partition map type. */
+static struct grub_partition_map grub_sun_partition_map =
+ {
+ .name = "sun",
+ .iterate = sun_partition_map_iterate,
+ };
+
+GRUB_MOD_INIT(part_sun)
+{
+ grub_partition_map_register (&grub_sun_partition_map);
+}
+
+GRUB_MOD_FINI(part_sun)
+{
+ grub_partition_map_unregister (&grub_sun_partition_map);
+}
+