/* * fs/partitions/mac.c * * Code extracted from drivers/block/genhd.c * Copyright (C) 1991-1998 Linus Torvalds * Re-organised Feb 1998 Russell King */ #include <linux/ctype.h> #include "check.h" #include "mac.h" #ifdef CONFIG_PPC_PMAC #include <asm/machdep.h> extern void note_bootable_part(dev_t dev, int part, int goodness); #endif /* * Code to understand MacOS partition tables. */ static inline void mac_fix_string(char *stg, int len) { int i; for (i = len - 1; i >= 0 && stg[i] == ' '; i--) stg[i] = 0; } int mac_partition(struct parsed_partitions *state, struct block_device *bdev) { int slot = 1; Sector sect; unsigned char *data; int blk, blocks_in_map; unsigned secsize; #ifdef CONFIG_PPC_PMAC int found_root = 0; int found_root_goodness = 0; #endif struct mac_partition *part; struct mac_driver_desc *md; /* Get 0th block and look at the first partition map entry. */ md = (struct mac_driver_desc *) read_dev_sector(bdev, 0, §); if (!md) return -1; if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC) { put_dev_sector(sect); return 0; } secsize = be16_to_cpu(md->block_size); put_dev_sector(sect); data = read_dev_sector(bdev, secsize/512, §); if (!data) return -1; part = (struct mac_partition *) (data + secsize%512); if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) { put_dev_sector(sect); return 0; /* not a MacOS disk */ } printk(" [mac]"); blocks_in_map = be32_to_cpu(part->map_count); for (blk = 1; blk <= blocks_in_map; ++blk) { int pos = blk * secsize; put_dev_sector(sect); data = read_dev_sector(bdev, pos/512, §); if (!data) return -1; part = (struct mac_partition *) (data + pos%512); if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) break; put_partition(state, slot, be32_to_cpu(part->start_block) * (secsize/512), be32_to_cpu(part->block_count) * (secsize/512)); #ifdef CONFIG_PPC_PMAC /* * If this is the first bootable partition, tell the * setup code, in case it wants to make this the root. */ if (machine_is(powermac)) { int goodness = 0; mac_fix_string(part->processor, 16); mac_fix_string(part->name, 32); mac_fix_string(part->type, 32); if ((be32_to_cpu(part->status) & MAC_STATUS_BOOTABLE) && strcasecmp(part->processor, "powerpc") == 0) goodness++; if (strcasecmp(part->type, "Apple_UNIX_SVR2") == 0 || (strnicmp(part->type, "Linux", 5) == 0 && strcasecmp(part->type, "Linux_swap") != 0)) { int i, l; goodness++; l = strlen(part->name); if (strcmp(part->name, "/") == 0) goodness++; for (i = 0; i <= l - 4; ++i) { if (strnicmp(part->name + i, "root", 4) == 0) { goodness += 2; break; } } if (strnicmp(part->name, "swap", 4) == 0) goodness--; } if (goodness > found_root_goodness) { found_root = blk; found_root_goodness = goodness; } } #endif /* CONFIG_PPC_PMAC */ ++slot; } #ifdef CONFIG_PPC_PMAC if (found_root_goodness) note_bootable_part(bdev->bd_dev, found_root, found_root_goodness); #endif put_dev_sector(sect); printk("\n"); return 1; }