4 * Code extracted from drivers/block/genhd.c
5 * Copyright (C) 1991-1998 Linus Torvalds
6 * Re-organised Feb 1998 Russell King
9 #include <linux/ctype.h>
13 #ifdef CONFIG_PPC_PMAC
14 #include <asm/machdep.h>
15 extern void note_bootable_part(dev_t dev, int part, int goodness);
19 * Code to understand MacOS partition tables.
22 static inline void mac_fix_string(char *stg, int len)
26 for (i = len - 1; i >= 0 && stg[i] == ' '; i--)
30 int mac_partition(struct parsed_partitions *state)
34 int slot, blocks_in_map;
36 #ifdef CONFIG_PPC_PMAC
38 int found_root_goodness = 0;
40 struct mac_partition *part;
41 struct mac_driver_desc *md;
43 /* Get 0th block and look at the first partition map entry. */
44 md = read_part_sector(state, 0, §);
47 if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC) {
51 secsize = be16_to_cpu(md->block_size);
53 data = read_part_sector(state, secsize/512, §);
56 part = (struct mac_partition *) (data + secsize%512);
57 if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) {
59 return 0; /* not a MacOS disk */
61 blocks_in_map = be32_to_cpu(part->map_count);
62 if (blocks_in_map < 0 || blocks_in_map >= DISK_MAX_PARTS) {
67 if (blocks_in_map >= state->limit)
68 blocks_in_map = state->limit - 1;
70 strlcat(state->pp_buf, " [mac]", PAGE_SIZE);
71 for (slot = 1; slot <= blocks_in_map; ++slot) {
72 int pos = slot * secsize;
74 data = read_part_sector(state, pos/512, §);
77 part = (struct mac_partition *) (data + pos%512);
78 if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
80 put_partition(state, slot,
81 be32_to_cpu(part->start_block) * (secsize/512),
82 be32_to_cpu(part->block_count) * (secsize/512));
84 if (!strncasecmp(part->type, "Linux_RAID", 10))
85 state->parts[slot].flags = ADDPART_FLAG_RAID;
86 #ifdef CONFIG_PPC_PMAC
88 * If this is the first bootable partition, tell the
89 * setup code, in case it wants to make this the root.
91 if (machine_is(powermac)) {
94 mac_fix_string(part->processor, 16);
95 mac_fix_string(part->name, 32);
96 mac_fix_string(part->type, 32);
98 if ((be32_to_cpu(part->status) & MAC_STATUS_BOOTABLE)
99 && strcasecmp(part->processor, "powerpc") == 0)
102 if (strcasecmp(part->type, "Apple_UNIX_SVR2") == 0
103 || (strncasecmp(part->type, "Linux", 5) == 0
104 && strcasecmp(part->type, "Linux_swap") != 0)) {
108 l = strlen(part->name);
109 if (strcmp(part->name, "/") == 0)
111 for (i = 0; i <= l - 4; ++i) {
112 if (strncasecmp(part->name + i, "root",
118 if (strncasecmp(part->name, "swap", 4) == 0)
122 if (goodness > found_root_goodness) {
124 found_root_goodness = goodness;
127 #endif /* CONFIG_PPC_PMAC */
129 #ifdef CONFIG_PPC_PMAC
130 if (found_root_goodness)
131 note_bootable_part(state->bdev->bd_dev, found_root,
132 found_root_goodness);
135 put_dev_sector(sect);
136 strlcat(state->pp_buf, "\n", PAGE_SIZE);