On Tue, 2008-04-08 at 12:06 +0200, Stefan Roese wrote: > On Tuesday 08 April 2008, Joakim Tjernlund wrote: > > > I'm afraid, but the "other ppc's" did break with this patch. At least 4xx > > > does. With your patch applied relocation to SDRAM does not work anymore. > > > Here's what I get: > > > > > > CFG_MONITOR_BASE=fffa0000 > > > (ulong)&_start + EXC_OFF_SYS_RESET=fffa2200 > > > EXC_OFF_SYS_RESET=100 > > > > > > I haven't looked into it closer yet. Any idea on how to fix this? > > > > > > Thanks. > > > > > > Best regards, > > > Stefan > > > > Oops, didn't see that coming. Your _start symbol in ppc4xx/start.S isn't > > pointing to your real start of execution. Seems like _start_440 is your > > real start but I can't be sure. > > No, unfortunately it's not. _start_440 is loaded into the last 4k of bootrom > (via linker script), since 440 has a shadow TLB upon startup to only map 4k > of address space. After looking at System.map it seems that _start_of_vectors > seems to be the way to go for 4xx: > > fffa0004 T version_string > fffa0100 t CritcalInput > fffa0100 T _start_of_vectors > > But I don't want to introduce some #ifdef here. Perhaps it would be better to > introduce a common (PPC) label that points to the beginning of the U-Boot > image here.
I first did a new symbol for this but changed it to use _start as I didn't want to introduce yet another symbol. I would hope it is possible to rework 4xx to move the _start symbol to were it belongs? Not having the _start symbol where it should be could bite you some other day too. > > BTW: I think this version: > > len = (ulong)&_end - ((ulong)&_start - EXC_OFF_SYS_RESET); > > instead of: > > len = (ulong)&_end - (ulong)&_start + EXC_OFF_SYS_RESET; > > is better. Makes the transition from CFG_MONITOR_BASE clearer, don't you > think > so? Sure, but I don't feel that strongly about it. ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Register now and save $200. Hurry, offer ends at 11:59 p.m., Monday, April 7! Use priority code J8TLD2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
