Marvell ARMADA 16x Applications Processor Family

Marvell ® ARMADA 16x Applications Processor Family
Version 3.2.x Boot ROM Reference Manual
USHORT Header;
USHORT NumReloc;
Rel_T Relo[NAND_RELOC_MAX];
}Reloc_T;
The header is a fixed value of 0x524E to identify the presence of a bad-block table; that is, if the
header is valid as defined above, the initial block scan has been completed. Otherwise, the block
scan has not been completed. The NumReloc parameter identifies the number of blocks that has
currently been relocated and is followed by up to 127 relocation pairs.
Typedef struct S_Rel
{
USHORT From;
USHORT To;
}Rel_T;
Const ULONG NAND_RELOC_MAX = 127;
Each “From” entry identifies the block that has been relocated and the entry “To” identifies the
relocated block number.
6.6.1.3 Bad Block Relocation Area
The last two percent of the blocks of the device are reserved for bad-block relocations. The first
block that is relocated goes to the very last block of the device; the second block relocated goes to
the second to the last block of the device, and so forth. This process effectively allows relocated
blocks to grow from the highest address down. A block in the relocation pool itself may be relocated,
so use caution when relocating to skip over these blocks. Figure 6 presents a typical Flash part
layout and a relocation table layout to tie the concepts together.
Figure 6: Example of Bad Block Table NAND Flash Mapping in Use —
Small Block NAND Flash Type: Samsung K9K1216Q0C* (Device ID =
0x46)
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Doc. No. MV-S301208-00 Rev. - Copyright © 11/15/10 Marvell
Page 48
November 2010 PUBLIC RELEASE