Hi all,
I'm working on an mcf5272 based board that has 32MB of Flash arranged in uniform sectors of 64KB and 16MB of SDRAM.
I've managed to get u-boot to start from Flash and successfully relocate to SDRAM. Below is the debug output from the console:
DRAM: 16 MB Reserving 217k for U-Boot at: 00fc9000 Reserving 256k for malloc() at: 00f89000 Reserving 64 Bytes for Board Info at: 00f88fc0 Reserving 48 Bytes for Global Data at: 00f88f90 Reserving 64k for boot parameters at: 00f78f90 Stack Pointer at: 00f78f78 Start relocate of code from fe000400 to 00fc9000 Now running in RAM - U-Boot at: 00fc9000 FLASH: flash_protect ON: from 0xFE000000 to 0xFE03FFFF protect on 0 protect on 1 protect on 2 protect on 3 32 MB In: serial Out: serial Err: serial U-Boot relocated to 00fc9000 No PHY device found. ### main_loop entered: bootdelay=5
### main_loop: bootcmd="<UNDEFINED>"
I've configured the hello_world example program to run from SDRAM at 0x40000. Here's a dump of the elf headers:
hello_world: file format elf32-m68k
Sections: Idx Name Size VMA LMA File off Algn 0 .text 000001de 00040000 00040000 00002000 2**2 CONTENTS, ALLOC, LOAD, READONLY, CODE 1 .rodata 0000008a 000401de 000401de 000021de 2**0 CONTENTS, ALLOC, LOAD, READONLY, DATA 2 .data 00000000 00042268 00042268 00002268 2**2 CONTENTS, ALLOC, LOAD, DATA 3 .got 00000048 00042268 00042268 00002268 2**2 CONTENTS, ALLOC, LOAD, DATA 4 .bss 00000000 000422b0 000422b0 000022b0 2**2 ALLOC 5 .stab 00000e40 00000000 00000000 000022b0 2**2 CONTENTS, READONLY, DEBUGGING 6 .stabstr 00001d3a 00000000 00000000 000030f0 2**0 CONTENTS, READONLY, DEBUGGING 7 .comment 0000014c 00000000 00000000 00004e2a 2**0 CONTENTS, READONLY
I can load the resultant binary using the loadb command but an exception is generated when I attempt to run the program:
-> loadb ## Ready for binary (kermit) download to 0x00040000 at 19200 bps... ## Total Size = 0x000022b0 = 8880 Bytes ## Start Addr = 0x00040000 -> go 40004 ## Starting application at 0x00040004 ...
*** Unexpected exception *** Vector Number: 4 Format: 04 Fault Status: 0
PC: 00ff97b8 SR: 00002004 SP: 00f78c20 D0: 00000004 D1: 000006d0 D2: 00ffa12c D3: 00000000 D4: 00000000 D5: 00000000 D6: 00000001 D7: 00f88f90 A0: 00ff97b8 A1: 00fe9fc8 A2: 00040004 A3: 00000000 A4: 00f78ce0 A5: 00ff8500 A6: 00f78cac
*** Please Reset Board! ***
I had a look at what's going on with the debugger - hello_world is jumping to an incorrect address (0xff97b8). This happens at the very start of the program.
I've read through the README and DULG I've scoured the mailing list archive. I still haven't been able to come up with a solution. Any ideas as to what I could be doing wrong??
Thanks for any help you can give.
Regards, Jim...