242
edits
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Line 442:
Line 442: − + − + + + + + + + + + − + Line 592:
Line 600: − + − +
→DPFS
|-
|-
| 0x38
| 0x38
| 4
| 1
| Flags (when this byte is non-zero, this is a DATA partition)
| When this byte is non-zero, this is a DATA partition, and IVFC level 4 is out side DPFS level 3, whose offset is specified by "IVFC level 4 offset"
|-
| 0x39
| 1
| DPFS level 1 selector. 0 = first one active; 1 = second one active
|-
| 0x3A
| 2
| Unknown
|-
|-
| 0x3C
| 0x3C
| 8
| 8
| File base offset (for DATA partitions)
| IVFC level 4 offset (for DATA partitions)
|}
|}
|}
|}
* Every level comes in pairs (concatenated), so the actual size of each level is twice as large as recorded in the "size" field. Level n (n = 1 or 2) is a bit-array (encoded in u32 array, with MSB as the first bit of each 32 bits), in which each bit corresponds to a block in level (n+1), indicating in which of the pair the block is the active one (0 means the first one, 1 means the second one). In this way, the actual valid data is scattered between the two IVFC partition images.
* Every level comes in pairs (concatenated), so the actual size of each level is twice as large as recorded in the "size" field. Level n (n = 1 or 2) is a bit-array (encoded in u32 array, with MSB as the first bit of each 32 bits), in which each bit corresponds to a block in level (n+1), indicating in which of the pair the block is the active one (0 means the first one, 1 means the second one). In this way, the actual valid data is scattered between the two IVFC partition images (Except for DATA partition, because its IVFC level 4 is out side DPFS level 3 and thus is not duplicated).
* The valid one in level 1 pair is probably chosen by the same bit of "Active partition table". However in this case, 0 means the second one and 1 means the first one (in the same order as the partition tables).
* The valid one in level 1 pair is chosen by "DPFS level 1 selector" in DIFI.
* The offsets contained in the DPFS are relative to the partition offset in the DISA/DIFF. The offsets from the IVFC are related to the IVFC partition (DPFS Level 3), after assembling the valid data.
* The offsets contained in the DPFS are relative to the partition offset in the DISA/DIFF. The offsets from the IVFC are related to the IVFC partition (DPFS Level 3), after assembling the valid data.