0c2efc4848
- Add partition table struct to be used to parse partition table in flash. - Add JFFS2 as a type, and add readoly flag. - Improve some comments. - Lindent has been run, fixing whitespace and formatting issues.
61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
#ifndef __ASM_AXISFLASHMAP_H
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#define __ASM_AXISFLASHMAP_H
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/* Bootblock parameters are stored at 0xc000 and has the FLASH_BOOT_MAGIC
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* as start, it ends with 0xFFFFFFFF */
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#define FLASH_BOOT_MAGIC 0xbeefcace
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#define BOOTPARAM_OFFSET 0xc000
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/* apps/bootblocktool is used to read and write the parameters,
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* and it has nothing to do with the partition table.
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*/
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#define PARTITION_TABLE_OFFSET 10
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#define PARTITION_TABLE_MAGIC 0xbeef /* Not a good magic */
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/* The partitiontable_head is located at offset +10: */
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struct partitiontable_head {
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__u16 magic; /* PARTITION_TABLE_MAGIC */
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__u16 size; /* Length of ptable block (entries + end marker) */
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__u32 checksum; /* simple longword sum, over entries + end marker */
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};
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/* And followed by partition table entries */
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struct partitiontable_entry {
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__u32 offset; /* relative to the sector the ptable is in */
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__u32 size; /* in bytes */
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__u32 checksum; /* simple longword sum */
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__u16 type; /* see type codes below */
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__u16 flags; /* bit 0: ro/rw = 1/0 */
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__u32 future0; /* 16 bytes reserved for future use */
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__u32 future1;
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__u32 future2;
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__u32 future3;
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};
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/* ended by an end marker: */
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#define PARTITIONTABLE_END_MARKER 0xFFFFFFFF
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#define PARTITIONTABLE_END_MARKER_SIZE 4
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#define PARTITIONTABLE_END_PAD 10
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/* Complete structure for whole partition table */
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/* note that table may end before CONFIG_ETRAX_PTABLE_ENTRIES by setting
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* offset of the last entry + 1 to PARTITIONTABLE_END_MARKER.
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*/
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struct partitiontable {
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__u8 skip[PARTITION_TABLE_OFFSET];
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struct partitiontable_head head;
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struct partitiontable_entry entries[];
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};
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#define PARTITION_TYPE_PARAM 0x0001
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#define PARTITION_TYPE_KERNEL 0x0002
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#define PARTITION_TYPE_JFFS 0x0003
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#define PARTITION_TYPE_JFFS2 0x0000
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#define PARTITION_FLAGS_READONLY_MASK 0x0001
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#define PARTITION_FLAGS_READONLY 0x0001
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/* The master mtd for the entire flash. */
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extern struct mtd_info *axisflash_mtd;
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#endif
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