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binman: Update documentation for image creation

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There are a few more steps in the process now. Update the documentation to
reflect this.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2019-07-20 12:23:52 -06:00
parent 12bb1a99c2
commit 4ab88b6f2f
1 changed files with 18 additions and 5 deletions
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23
tools/binman/README
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@ -679,22 +679,35 @@ large enough to hold all the entries.
7. CheckEntries() - checks that the entries do not overlap, nor extend
outside the image.
8. SetCalculatedProperties() - update any calculated properties in the device
8. SetImagePos() - sets the image position of every entry. This is the absolute
position 'image-pos', as opposed to 'offset' which is relative to the containing
section. This must be done after all offsets are known, which is why it is quite
late in the ordering.
9. SetCalculatedProperties() - update any calculated properties in the device
tree. This sets the correct 'offset' and 'size' vaues, for example.
9. ProcessEntryContents() - this calls Entry.ProcessContents() on each entry.
10. ProcessEntryContents() - this calls Entry.ProcessContents() on each entry.
The default implementatoin does nothing. This can be overriden to adjust the
contents of an entry in some way. For example, it would be possible to create
an entry containing a hash of the contents of some other entries. At this
stage the offset and size of entries should not be adjusted unless absolutely
necessary, since it requires a repack (going back to PackEntries()).
10. WriteSymbols() - write the value of symbols into the U-Boot SPL binary.
11. ResetForPack() - if the ProcessEntryContents() step failed, in that an entry
has changed its size, then there is no alternative but to go back to step 5 and
try again, repacking the entries with the updated size. ResetForPack() removes
the fixed offset/size values added by binman, so that the packing can start from
scratch.
12. WriteSymbols() - write the value of symbols into the U-Boot SPL binary.
See 'Access to binman entry offsets at run time' below for a description of
what happens in this stage.
11. BuildImage() - builds the image and writes it to a file. This is the final
step.
13. BuildImage() - builds the image and writes it to a file
14. WriteMap() - writes a text file containing a map of the image. This is the
final step.
Automatic .dtsi inclusion