Hi,
I'm porting U-Boot to a ppc440 core based SoC. The system now doesn't have flash. So CFG_NO_FLASH and CFG_ENV_IS_NOWHERE are defined. After stucked in DDR mem initialization for a while (logic designers need to fix their bugs), I finally make U-Boot run on the system and the prompt is shown on the console. But the first command I typed causes u-boot to crash. The strange thing is that there is nothing in the call backtrace. Any hints to the cause? The chip is running on an emulator and the only modules u-boot brings up is UART and DDR. It may not be stable. So h/w still is more suspicious than u-boot itself. I wanna make sure this illeagal instruction exception isnot caused by u-boot.
U-Boot 1.1.3 (Jul 22 2005 - 17:02:13)
DRAM: 32 MB Top of RAM usable for U-Boot at: 02000000 Reserving 89k for U-Boot at: 01fe9000 Reserving 132k for malloc() at: 01fc8000 Reserving 112 Bytes for Board Info at: 01fc7f90 Reserving 48 Bytes for Global Data at: 01fc7f60 Stack Pointer at: 01fc7f48 New Stack Pointer is: 01fc7f48 Now running in RAM - U-Boot at: 01fe9000 Using default environment
In: serial Out: serial Err: serial U-Boot relocated to 01fe9000 => ? ? - al NIP: 00000000 XER: 20000000 LR: 00000000 REGS: ffffff28 TRAP: 0700 DAR: FFFFFFFF MSR: 00029000 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 00
GPR00: 00000000 00000018 BFFF8310 40120481 0000006C 00000001 00000001 01FCA055 GPR08: 00000010 1FCA0558 00000040 00000001 00000030 00000000 02004D00 02069000 GPR16: 00000000 00000000 00000000 00000000 00009000 01FC7C28 00000001 00000020 GPR24: 00000001 01FC7BA0 01FC7BA0 00000001 01FFCAF0 01FC7F60 0000000A 00000000 ** Illegal Instruction ** Call backtrace: 00000000 Program Check Exception
Thanks a lot, -Shawn.