Andre Schwarz <andre.schw...@matrix-vision.de> wrote on 2010/10/26 14:34:57: > > All, > > > > >> Having a look at include/asm/global_data.h gives some 40 ulongs for my > >> MPC8377 system. > >> Current CONFIG_SYS_GBL_DATA_SIZE= 0x100 which should be enough. > >> > > Indeed. I was asking because I just discovered that most of the > > PowerPC boards are actually broken in this respect - 89 % of them, > > 170 out of 191 :-( > > > > > >> The system is still dead after removing the 4 nops after _start. > >> > > actually I'm facing another issue and don't now whether this might be > related to this thread or not. > > > Just before relocation in arch/powerpc/lib/board.c the CPU gets a "check > stop" followed by reset during "memset()" in line 493. > > [snip] > DRAM: 256 MiB > Top of RAM usable for U-Boot at: 10000000 > Reserving 341k for U-Boot at: 0ffaa000 > Reserving 512k for malloc() at: 0ff29f80 > > - reset - > > U-Boot 2010.09-00488-g5edbadb-dirty (Oct 26 2010 - 14:16:00) MPC83XX > > Reset Status: Check Stop, External/Internal Soft, External/Internal Hard > > > I know that DDR might not be 100% stable but it is basically set up > properly. > Removing the memset yields the next debug messages before resetting > again while setting up SP. > > Is the DDR required to work 100% for a simple write operation or might > there be another problem ?
Yes, DDR must be correct. You might get a bit further by turning off the data cache. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
