Fwd: [PATCH] Load PBL into SRAM

[David Vincent]

2014-02-04 Sascha Hauer <s.hauer at pengutronix.de>:
> On Mon, Feb 03, 2014 at 10:58:06AM +0100, David Vincent wrote:
>> 2014-02-03 Sascha Hauer <s.hauer at pengutronix.de>:
>>
>> > On Fri, Jan 31, 2014 at 10:06:10AM +0100, David Vincent wrote:
>> > > This allows to load all the lowlevel init code, including the
>> > > uncompressor, inside SRAM and not just the bare init part. This is
>> > > useful when pbl is used as a first-stage bootloader but is loaded by an
>> > > external firmware.
>> >
>> > Just to make sure I understand this correctly: The patch does not make a
>> > code change, all it does is to check that the binary does not get too
>> > big, right?
>>
>>
>> Exactly, just like BAREBOX_MAX_BARE_INIT_SIZE but for the whole
>> prebootlader code (lowlevel + uncompressor + caches (?) + etc...) not
>> just functions marked as __bare_init.
>>
>> >
>> > > +config BAREBOX_MAX_PBL_SIZE
>> > > +     depends on PBL_IMAGE && LOAD_PBL_SRAM
>> > > +     prompt "Maximum pre-bootloader size"
>> > > +     hex
>> > > +     default 0xffffffff
>> > > +     help
>> > > +       Define the maximum size of pbl
>> > > +       this will allow your pbl to fit in SRAM as example
>> > > +       ARCH can overwrite it via ARCH_BAREBOX_MAX_PBL_SIZE
>> >
>> > I stumble upon this 'allow', maybe better something like:
>> >
>> > On some hardware the ROM code can load the pbl into SRAM, but not the
>> > whole image. This option specifies how big the pbl may get.
>>
>>
>> I copied the definition from BAREBOX_MAX_BARE_INIT_SIZE as it shares
>> the same goal, but if you find it clearer that way, I can resubmit the
>> patch with that definition, it is up to you !
>
> Yes, I think it's clearer and we should use the definition.

Done

>
> Sascha
>
>
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