Hi Martin,
On Monday 16 July 2007, Martin Krause wrote:
support for - at least some - MPC8xx boards seems broken. To prepare some new patches, I build a current U-Boot (top of tree) for our TQM885D board. With this U-Boot, some time after relocation to RAM the board hangs:
<snip>
I tracked the problem down (git bisect is great!) to the commit "ppc4xx: Clean up 440 exceptions handling" from Stefan Roese on 15 Jun 2007 (efa35cf12d914d4caba942acd5a6c45f217de302).
More precisely to the following patch:
--- a/include/ppc_asm.tmpl +++ b/include/ppc_asm.tmpl @@ -217,7 +217,7 @@
- We assume sprg3 has the physical address of the current
- task's thread_struct.
*/ -#define EXCEPTION_PROLOG \ +#define EXCEPTION_PROLOG(reg1, reg2) \ mtspr SPRG0,r20; \ mtspr SPRG1,r21; \ mfcr r20; \ @@ -235,8 +235,10 @@ stw r22,_CTR(r21); \ mfspr r20,XER; \ stw r20,_XER(r21); \
mfspr r22,SRR0; \mfspr r23,SRR1; \
mfspr r20,DEAR; \ <--stw r20,_DAR(r21); \ <--
We are currently working on a fix for this. Sorry for the inconvenience.
Best regards, Stefan
===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office@denx.de =====================================================================