[U-Boot] U-Boot Crashes with Dumps

[anupbehare at gmail.com <anupbehare@gmail.com>]

In my case CONFIG_SYS_MONITOR_LEN is 256KB
and CONFIG_SYS_MONITOR_BASE is 0xfffc0000
my destaddr is 0x1ffd5000

so gd->reloc_off = destaddr - CONFIG_SYS_MONITOR_BASE;
so gd->reloc_off = 0x20015000
also gd->malloc = 0x1fed1000

After that it continuously restarts with error machine check exception.

Is that mean ram initialization is not done or some thing with reloc_off as  
it is going in -ve.


On 12-Jan-2010 12:56pm, Stefan Roese <sr@denx.de> wrote:
> On Tuesday 12 January 2010 08:02:51 anupbehare at gmail.com wrote:


> > I begin use U-Boot at my custom board based on ppc440x5.





> What kind of PPC4xx ist this? PPC440EPx?





> > Here is Mem Info that we are using on board:


> >


> > 16MB Nor flash with base address 0xfc000000


> > 512MB DDR with base addr 0x00000000


> > 256kb ISRAM with base addr 0xc0000000


> >


> > TEXT_BASE 0xfffc0000


> >


> > Tlb entries for board is:


> > tlbentry( 0xff000000, SZ_16M, 0xff000000, 0, AC_R|AC_X|AC_W) ------Flash


> > tlbentry( 0xc0000000, SZ_256K, 0xc0000000, 0, AC_R|AC_W|AC_X|SA_I)


> > ------ISRAM


> > tlbentry( 0x00000000, SZ_256M, 0x00000000, 0, AC_R|AC_W|AC_X|SA_I|SA_G)


> > ------DDR


> > tlbentry( 0x10000000, SZ_256M, 0x10000000, 0, AC_R|AC_W|AC_X|SA_I|SA_G)


> > ------DDR


> >


> >


> > I am trying to get a clean build of U-Boot to run on the PPC440x5 based


> > customized board. I have the latest versions U-Boot.


> > The system executes through board_init_f( ) without any problems, and  
> gets


> > into board_init_r( ). The console output is as follows:


> >


> > 512 MB (ECC is ON, 400 MHz, CL 7)


> > Top of RAM usable for U-Boot at: 20000000


> > Reserving 170k for U-Boot at: 1ffd5000


> > Reserving 1040k for malloc() at: 1fed1000


> > Reserving 128 Bytes for Board Info at: 1fed0f80


> > Reserving 64 Bytes for Global Data at: 1fed0f40


> > Stack Pointer at: 1fed0f28


> > New Stack Pointer is: 1fed0f28


> > relocate addr_sp = 1fed0f28, id = 1fed0f40, addr = 1ffd5000


> >


> > Now running in RAM - U-Boot at: 1ffd5000


> >


> > NIP: 1FFD7764 XER: 00000000 LR: 1FFD7764 REGS: 1fed0e20 TRAP: 0200 DEAR:


> > FFED0F18


> > MSR: 00021000 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00


> >


> > GPR00: 1FFD7338 1FED0F10 1FED0F40 1FFD5000 1FFD88E0 00000000 00000000


> > 1FFD7764


> > GPR08: 00000600 00002098 00000030 2FAF07FE FFFFFFFF C000B330 20002A00


> > 20015000


> > GPR16: 00000000 00000000 00000000 00000000 48FF2422 00000610 00002C20


> > 00000000


> > GPR24: 00000000 1FED0F40 1FFD5000 1FED5000 1FED0F80 1FFD5000 20002B10


> > 1FED1000


> > Call backtrace:


> > 1FFD88D8 1FFD76D8 00000000


> > machine check





> When U-Boot crashes/hangs upon relocation to SDRAM, you most likely have a


> problem with your SDRAM configuration. Again, which CPU are you using?  
> How is


> the SDRAM connected (DIMM or onboard). I suggest you check your SDRAM


> controller setup again.





> > Here I am trying to use backtrace to debug but system is waiting at


> > folloing console o/p.


> >


> > [root at u-boot]$ cp ../../11dec_rec/u-boot/backtrace .


> > [root at u-boot]$backtrace System.map 0xdffeb000


> > Reading symbols from System.map


> > Using Address Offset 0xdffeb000





> This link might help:





> http://www.denx.de/wiki/DULG/DebuggingUBoot





> Especially chapter 10.1.2. Debugging of U-Boot After Relocation.





> Cheers,


> Stefan





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