Layerscape中的主题 Re: LS1043A PBL SD Card Boot

LS1043A PBL SD Card Boot

vbonduro — Mon, 17 Apr 2017 19:44:08 GMT

Hello,

Section 27.5 of the QorIQ LS1043A Reference Manual, Rev. 3, 02/2017 States the following:

The PBL starts searching for the first good block. It begins to fetch the PBL image at the
starting address of that block.

Few questions on these two statements:

1. What represents a "good block"? (eg. a well formatted RCW?)

2. What is the definition of a PBL Image? (eg. Is it the RCW + PBI commands, just the RCW, etc. ?)

3. Does the PBL search for the RCW or must it exist at the starting address (for SD Card, sector 8)?

Thanks

Re: LS1043A PBL SD Card Boot

bpe — Wed, 19 Apr 2017 16:04:10 GMT

Q1 and Q3: The Manual is not very accurate. Actually, it performs
no search, just reads the card sector 8, "good" means readable.

Q2: See LS1043ARM, Section 27.4.3

Have a great day,
Platon

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