On Wed, Jul 08, 2009 at 03:31:29PM -0700, Ira W. Snyder wrote: > On Wed, Jul 08, 2009 at 02:28:39PM -0500, Peter Tyser wrote: > > These changes bring the 83xx SDRAM ECC initialization in line > > with the 85xx/86xx boards and also fixes a minor bug in fsl_dma.c. > > > > I don't have any 83xx boards to test on, so it would be appreciated > > if someone with 83xx hardware that uses ECC could give the patches > > a shot. > > > > It'd be nice if SDRAM could be initialized via the DDR controller > > with CONFIG_ECC_INIT_VIA_DDRCONTROLLER on the 83xx platform too, > > but I'm not going to tackle it:) > > > > The patches also resolve the compile error Stefan brought up with > > non-freescale boards with CONFIG_ECC. > > > > Peter Tyser (3): > > 83xx: Default to using DMA to initialize SDRAM > > 83xx: Added CONFIG_MEM_INIT_VALUE for boards with ECC > > fsl_dma: Fix SDRAM initial value > > > > Something in this patch makes the ECC DDR initialization VERY slow. It > used to take <5 seconds, now it takes ~20 seconds for the memory to > initialize. > > I wonder why the CPU method would be so much faster? >
As a further quick note, I just hacked in support for initializing the DDR via the DDR controller. Nothing good for submission, but it works fine for my board. (We're using fixed_sdram(), no SPD code). The DDR controller takes about 3 seconds to initialize all 256MB of RAM on the board. Ira _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
