[U-Boot] DBCR0 reset problem in MPC8548CDS
Werner Nedel
wmnedel at gmail.com
Thu Apr 9 20:03:35 CEST 2009
Hi,
I'm trying to update my u-boot version (1.2) to the last one (2009.03). My
board is very similar to MPC8548CDS. Everything was working fine till I
tried to use the reset command. It hangs the processor in cpu_init_early_f,
when it realocates ccsbar. I'd always used the hard reset in DBCR0 register
instead HRESET_REQ that ins't wired in my board.
I saw that the value of MSR register came different before reset when I
compare with the old u-boot (0x8000 -> 0x29200). There are new writes in
this register in this new version, could any of them causing my problem?
The major difference beetwen my configuration and default resides in
u-boot.lds. I changed ADDR(.text) by the fisical init address of my boot
flash, that is different of my TEXT_BASE, but bootpg and resetvec still in
the same address, so I think that it couldn't be the problem.
u-boot.lds:
> .bootpg 0xfff80000 + 0x7f000 :
< .bootpg ADDR(.text) + 0x7f000 :
{
cpu/mpc85xx/start.o (.bootpg)
} :text = 0xffff
> .resetvec 0xfff80000 + 0x7fffc :
< .resetvec ADDR(.text) + 0x7fffc :
{
*(.resetvec)
} :text = 0xffff
> . = 0xfff80000 + 0x80000;
< . = ADDR(.text) + 0x80000;
Thanks in advance,
Werner Nedel.
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