[U-Boot-Users] Query about U-Boot NAND ENV section

[Wolfgang Denk]

In message <91C99CB54D033E469E6D6702BAE5744701CEF3F7 at dbde01.ent.ti.com> you wrote:
> 
> I tried to dig into this issue, and found that, U-Boot for NAND Flash is
> designed the same way. The function "nand_init" gets invoked after
> "env_init" and "serial_init", and sue to this U-Boot always uses the
> default baudrate. 

Thjis is a dilemma - U-Boot tries to support porting and debugging by
enabling the serial console very, very early, typically  long  before
relocation  to  RAM.  In  this  state,  we  have only a verly limited
environment - small stack, no writable data  segment,  no  BSS,  etc.
This  is  not  sufficient  for  the  (pretty  complicated) NAND flash
driver.  So  U-Boot  cannot  read  the  baudrate  setting  from   the
environment in NAND...

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Remember, an int is not always 16 bits. I'm  not  sure,  but  if  the
80386  is one step closer to Intel's slugfest with the CPU curve that
is aymptotically approaching a real machine, perhaps an int has  been
implemented as 32 bits by some Unix vendors...?       - Derek Terveer