[U-Boot] [PATCH] Make flash protection work, when the environment is in EEPROM

[Sascha Hauer <s.hauer@pengutronix.de>]

On Sun, Mar 22, 2009 at 11:01:09PM -0400, Jon Smirl wrote:
> On Sun, Mar 22, 2009 at 6:59 PM, Sascha Hauer <s.hauer@pengutronix.de> wrote:
> > Hi Wolgang,
> >
> > On Sat, Mar 21, 2009 at 09:24:05PM +0100, Wolfgang Denk wrote:
> >> Dear Jon Smirl,
> >>
> >> In message <9e4733910903211308v63878fabx19f3327371db56c6@mail.gmail.com> you wrote:
> >> >
> >> > My guess is getenv() returns a pointer to the environment variable,
> >> > not a copy of the environment variable. getenv_r() returns a copy. How
> >> > can you return a pointer to the variable if the variable is in
> >> > something not directly addressable like EEPROM? ?Does
> >>
> >> The environment always gets copied to RAM. And it's a perfectly simple
> >> thing to return an adress pointing to some memory in RAM :-)
> >>
> >> > getenv("unlock"); do what you want when the environment is in EEPROM?
> >>
> >> getenv() always works that way, no matter which actual media is used
> >> for the persistent storage of the environment.
> >
> > This is not quite true. In the PPC init sequence flash_init() is called
> > before env_relocate() and thus getenv is not available in flash_init().
> > Please note that this was just a quick way for us to make things work
> > and I never considered this a fix for mainline.
> 
> What is your fix for mainline?

I have none.

Sascha

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