[U-Boot] [PATCH 3/8 v2] Introduce the Tertiary Program loader

[Wolfgang Denk <wd@denx.de>]

Dear Haiying Wang,

In message <1295906076.2051.127.camel@haiying-laptop> you wrote:
>
> > What I do not understand is what the TPL_BOOT variable in the
> > Makefile is good for.  I cannot understand the current use.
> 
> Well, it was used to generate the tpl image under tpl/ directory. Maybe TPL_BOOT is a bad name here, I just thought it was too simple to use TPL. 

It's not the name.  But you use it ina few places here, buth then hard
encode "tpl" in a number of other paces there.  Which means that you
cannot change TPL_BOOT to any other value, or building would break.
So why do we need this variable?

> > > > > +$(TPL_BOOT):	$(TIMESTAMP_FILE) $(VERSION_FILE) depend
> > > > > +		$(MAKE) -C tpl/board/$(BOARDDIR) all
> > > > 
> > > > Assume CONFIG_TPL_U_BOOT is not defined, then TPL_BOOT is not defined,
> > > > and this rule will probably cause a build error, doesn't it?
> > > No, I don't think there is a build error.
> > 
> > WEell, if CONFIG_TPL_U_BOOT is not 'y', then TPL_BOOT is not
> > defined, which results in this make rule:
> > 
> > 	: $(TIMESTAMP_FILE) $(VERSION_FILE) depend
> > 		$(MAKE) -C tpl/board/$(BOARDDIR) all
> > 
> > i. e. there would be no target name befoe the semicolon.
> If TPL_BOOT here is not defined, the reset(after semicolon) will not be executed, just like NAND_SPL and ONENAND_IPL etc. 

Sorry, I cannot follow - which reset? which semicolon?

Best regards,

Wolfgang Denk

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