Editing Flash:cvtrm
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==NAND VTRM Structure== | ==NAND VTRM Structure== | ||
Overview: A good way to understand the structure is to think in how the vtrm is created, there are 3 main | Overview: A good way to understand the structure is to think in how the vtrm is created, there are 3 main steps where are written the 'magic_vtrm' sections (colored in black in the examples), in general lines can be said the 'magic_vtrm' sections are created "from bottom to top". This explain doesnt includes the steps needed to create the first 'magic_vtrm' section | ||
In the first step is performed an "erase" command from 0xEC000 up to 0xF0000 (0x200 blocks are filled with 0xFF's). After that the first 2 blocks are reserved (from 0xEC000 up to 0xEC400). The creation process starts at the third block (at offset 0xEC0400), this section where is used for first time the 'magic_vtrm' can be considered the most "inner" vtrm, or the most older in the creation process | |||
After that 'inner' vtrm is created (how is created is out of the explain) then the creation process returns to the first block (the area that was reserved before from 0xEC000 up to 0xEC400), most of the steps made to create this area consists in copying and indexing other areas of the 'inner' vtrm | After that 'inner' vtrm is created (how is created is out of the explain) then the creation process returns to the first block (the area that was reserved before from 0xEC000 up to 0xEC400), most of the steps made to create this area consists in copying and indexing other areas of the 'inner' vtrm | ||