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@ -29,7 +29,6 @@ |
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#include <linux/mtd/partitions.h> |
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#include <linux/bootmem.h> |
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#include <linux/squashfs_fs.h> |
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#include <linux/root_dev.h> |
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struct ar7_bin_rec { |
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unsigned int checksum; |
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@ -43,85 +42,84 @@ static int create_mtd_partitions(struct mtd_info *master, |
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struct mtd_partition **pparts,
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unsigned long origin) |
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{ |
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char sig[8]; |
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struct ar7_bin_rec header; |
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unsigned int offset, new_offset, len; |
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struct squashfs_super_block sb; |
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unsigned int block_size = 0x10000, pre_size = 0x10000, |
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post_size = 0, root_offset = 0xe0000;
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unsigned int p = 3; |
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unsigned int offset, len; |
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unsigned int pre_size = master->erasesize, post_size = 0, |
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root_offset = 0xe0000; |
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int retries = 10; |
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printk("Parsing AR7 partition map...\n"); |
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ar7_parts[0].name = "loader"; |
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ar7_parts[0].offset = 0; |
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ar7_parts[0].size = block_size; |
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ar7_parts[0].size = master->erasesize; |
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ar7_parts[0].mask_flags = MTD_WRITEABLE; |
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ar7_parts[1].name = "config"; |
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ar7_parts[1].size = block_size; |
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ar7_parts[1].offset = 0; |
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ar7_parts[1].size = master->erasesize; |
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ar7_parts[1].mask_flags = 0; |
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master->read(master, block_size, 8, &len, sig); |
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if (strncmp(sig, "TIENV0.8", 8)) { |
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ar7_parts[1].offset = master->size - block_size; |
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post_size = block_size; |
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} else { |
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ar7_parts[1].offset = block_size; |
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pre_size = block_size * 2; |
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do { |
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offset = pre_size; |
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master->read(master, offset, sizeof(header), &len, (u_char *)&header); |
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if (!strncmp((char *)&header, "TIENV0.8", 8)) |
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ar7_parts[1].offset = pre_size; |
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if (header.checksum == 0xfeedfa42) |
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break; |
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if (header.checksum == 0xfeed1281) |
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break; |
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pre_size += master->erasesize; |
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} while (retries--); |
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pre_size = offset; |
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if (!ar7_parts[1].offset) { |
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ar7_parts[1].offset = master->size - master->erasesize; |
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post_size = master->erasesize; |
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} |
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ar7_parts[2].name = "linux"; |
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ar7_parts[2].offset = pre_size; |
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ar7_parts[2].size = master->size - block_size * 2; |
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ar7_parts[2].mask_flags = 0; |
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offset = pre_size; |
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master->read(master, offset, sizeof(header), &len, (u_char *)&header); |
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if (header.checksum != 0xfeedfa42) { |
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printk("Unknown magic: %08x\n", header.checksum); |
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} else { |
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switch (header.checksum) { |
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case 0xfeedfa42: |
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while (header.length) { |
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offset += sizeof(header) + header.length; |
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master->read(master, offset, sizeof(header), |
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&len, (u_char *)&header);
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} |
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root_offset = offset + sizeof(header) + 4; |
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break; |
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case 0xfeed1281: |
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while (header.length) { |
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offset += sizeof(header) + header.length; |
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master->read(master, offset, sizeof(header), |
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&len, (u_char *)&header);
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} |
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root_offset = offset + sizeof(header) + 4 + 0xff; |
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root_offset &= ~(u32)0xff; |
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break; |
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default: |
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printk("Unknown magic: %08x\n", header.checksum); |
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break; |
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} |
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ar7_parts[p].name = "rootfs"; |
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ar7_parts[p].offset = root_offset; |
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ar7_parts[p].size = master->size - root_offset - post_size; |
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ar7_parts[p++].mask_flags = 0; |
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master->read(master, root_offset, sizeof(sb), &len, (u_char *)&sb); |
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if (sb.s_magic == SQUASHFS_MAGIC) { |
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printk("Squashfs detected (size %Ld)\n", sb.bytes_used); |
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new_offset = root_offset + sb.bytes_used; |
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if ((new_offset % master->erasesize) > 0) |
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new_offset += master->erasesize -
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(new_offset % master->erasesize);
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ar7_parts[p].name = "rootfs_data"; |
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ar7_parts[p].offset = new_offset; |
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ar7_parts[p].size = master->size - new_offset - post_size; |
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ar7_parts[p - 1].size -= ar7_parts[p].size; |
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ar7_parts[p - 1].mask_flags |= MTD_WRITEABLE; |
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ar7_parts[p++].mask_flags = 0; |
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ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, p - 1); |
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} else { |
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printk("Squashfs not found. Moving rootfs partition to next erase block\n"); |
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if ((root_offset % master->erasesize) > 0)
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root_offset += master->erasesize -
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(root_offset % master->erasesize);
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ar7_parts[p].offset = root_offset; |
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ar7_parts[p].size = master->size - root_offset - post_size; |
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ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, p); |
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master->read(master, root_offset, sizeof(header), &len, (u_char *)&header); |
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if (header.checksum != SQUASHFS_MAGIC) { |
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root_offset += master->erasesize - 1; |
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root_offset &= ~(master->erasesize - 1); |
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} |
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ar7_parts[2].name = "linux"; |
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ar7_parts[2].offset = pre_size; |
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ar7_parts[2].size = master->size - pre_size - post_size; |
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ar7_parts[2].mask_flags = 0; |
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ar7_parts[3].name = "rootfs"; |
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ar7_parts[3].offset = root_offset; |
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ar7_parts[3].size = master->size - root_offset - post_size; |
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ar7_parts[3].mask_flags = 0; |
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*pparts = ar7_parts; |
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return p; |
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return 4; |
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} |
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static struct mtd_part_parser ar7_parser = { |
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