[U-Boot-Users] [PATCH: dtc take 2] Assemble the blob in memory before writing it out.
Jerry Van Baren
gerald.vanbaren at smiths-aerospace.com
Thu Apr 19 20:49:43 CEST 2007
Jon Loeliger wrote:
> On Wed, 2007-04-18 at 20:59, Jerry Van Baren wrote:
>> This makes padding out the blob if the user requested extra size much
>> easer. The assembly and writing to the file is more straight forward too.
>> Signed-off-by: Gerald Van Baren <vanbaren at cideas.com>
>> Hi David, Jon,
>> I wasn't happy with David's suggestion on the -S handling. I also wasn't
>> all that wild about how the blob was assembled and then written to the
>> file piecemeal with "ad-hoc" alignment padding. I realized I could fix
>> both by assembling the blob in memory as a "struct data" and then write
>> the whole thing out in one fell swoop.
>> Makes it a lot simpler and cleaner to my eyes.
>> Hope y'all agree,
> Jerry and David,
> Sorry. I've been out sick for a couple days here and am
> just now catching up. I've read through the last week's
> worth of mail here now, so let me see if I have properly
> summarized where things stand and what's needed for the DTC:
> These patches need to be applied:
> [PATCH dtc] Add -o <output file> to the usage message.
> Sat, 14 Apr 2007 18:16:47 -0400
> [PATCH dtc take 3] Fix reserve map output for asm format.
> Tue, 17 Apr 2007 18:14:41 -0400
> [PATCH: dtc take 2] Assemble the blob in memory before writing it out.
> Wed, 18 Apr 2007 21:59:51 -0400
> The last patch there replaces the "Improve -S handling" patches.
> But does the last patch replace or depend on the second one?
> And I agree with David that last patch is a better approach.
Yes, you have that right.
Patch #1 is good to go
[PATCH dtc] Add -o <output file> to the usage message.
Sat, 14 Apr 2007 18:16:47 -0400
Patch #2 and #3...
[PATCH dtc take 3] Fix reserve map output for asm format.
Tue, 17 Apr 2007 18:14:41 -0400
[PATCH: dtc take 2] Assemble the blob in memory before writing it out.
Wed, 18 Apr 2007 21:59:51 -0400
...you force me to make a confession. The third patch depends on the
second patch because I snuck in a fix to the ASM output into the third
patch: the last two chunks fix the ASM header output - I padded the blob
out but didn't change the size properly in the header. In the third
patch above, I added a label "%s_blob_abs_end" and used that to
calculate the total blob size (including the padding) in the header:
- fprintf(f, "\t.long\t_%s_blob_end - _%s_blob_start /* totalsize */\n",
+ fprintf(f, "\t.long\t_%s_blob_abs_end - _%s_blob_start /* totalsize */\n",
AAAARGH! Sorry, I see I left a debug statement in flattree.c around
@@ -383,28 +370,46 @@ void dt_to_blob(FILE *f, struct boot_info *bi, int
+fprintf(stderr, "minsize = %d, totalsize = %d, padlen = %d\n", minsize,
1) Take the last two patches as is and remove the fprintf yourself
2) I'll fix it tonight and provide a New Improved patch
More information about the U-Boot