Re: [U-Boot-Users] [PATCH] PPC40x: Rework CFG_INIT_DCACHE_CS Block to Avoid Machine Checks

In message 1210973711-1855-1-git-send-email-gerickson@nuovations.com you wrote:

...

cpu/ppc4xx/start.S: Reworked code to handle the primordial stack and data area initialization when CFG_INIT_DCACHE_CS is asserted.

...

• * Boards like the Kilauea (405EX) don't have OCM and can't use
  

• * DCache for init-ram. So setup stack here directly after the
  

• * SDRAM is initialized.
  

• * For boards that don't have OCM and can't use the data cache
  

• * for their primordial stack, setup stack here directly after the
  

• * SDRAM is initialized in ext_bus_cntlr_init.
  

Was there ever a useful explanation given why these boards should not be able to use DC as initial RAM?

Best regards,

Wolfgang Denk