[U-Boot-Users] Need Some Help

[Mondesir, Alshine]

My latest endaevor has me cross compiling a stand alone application for
MPC8548 PPC for a U-Boot Based target.  There is no Operating System to
run on the target to speak of, just my application.  I'm building the
application in Code Warrior using an 8548_init.S hardware intialization
file.

 

1) My first thought was that this should be as simple as using the .ELF
image that codewarrior produces, right?  So I build a simple hello_world
application and sent it down to my target.  U-Boot recognizes it as an
ELF image, sets up the segements, and tries to run it!  But then low and
behold, the U-Boot flash image comes up again. 

 

=> bootelf 400000

Loading .init @ 0x00002000 (972 bytes)

Loading .text @ 0x000023d0 (7624 bytes)

Loading .rodata @ 0x00004198 (256 bytes)

Loading .ctors @ 0x00004298 (8 bytes)

Loading .dtors @ 0x000042a0 (8 bytes)

Loading extab @ 0x000042a8 (16 bytes)

Loading extabindex @ 0x000042b8 (72 bytes)

Loading .data @ 0x00004300 (1024 bytes)

Loading .sdata @ 0x00004700 (44 bytes)

Clearing .sbss @ 0x00004730 (28 bytes)

Clearing .bss @ 0x00004750 (784 bytes)

Loading .abs.00000c00 @ 0x00000c00 (244 bytes)

## Starting application at 0x00002044 ...

 

U-Boot 1.3.0 (Jul 21 2008 - 12:20:51)

 

CPU:   8548_E, Version: 2.1, (0x80390021)

Core:  E500, Version: 2.2, (0x80210022)

Clock Configuration:

 

2) My next thought was to try and wrap it as a stand alone application
image using "mkimage"  Ok, Great   To no avail....

 

$ mkimage -A ppc -O u-boot -T standalone -C none -a 2000 -e 2044 -n
"Hiya stranger" -d debug.bin uDebug.bin              

 

## Total Size      = 0x00003ea0 = 16032 Bytes

=> bootm 400000

## Booting image at 00400000 ...

   Image Name:   Hiya stranger

   Image Type:   PowerPC U-Boot Standalone Program (uncompressed)

   Data Size:    15968 Bytes = 15.6 kB

   Load Address: 00002000

   Entry Point:  00002044

   Verifying Checksum ... OK

OK

**bleep**: 00000000 XER: 20000000 LR: 0FFD6378 REGS: 0ff9dc98 TRAP: 0700
DAR: 00000000

MSR: 00021200 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00

 

GPR00: 0FFD634C 0FF9DD88 00000200 00000001 0FFA048C 00000000 00005E5C
00000000

GPR08: 00000000 0FF9E00C 00000170 0FFD398C 0FF9DB70 0000C700 0FFF9A00
10040000

GPR16: 00000000 0FFEC9B4 00000000 00400040 00000001 00400000 00000000
00000001

GPR24: 0FFF52F8 0FFA0488 00000002 00002044 00400040 0FF9DF80 0FFFA2AC
00400000

** Illegal Instruction **

Call backtrace:

0FFD634C 0FFE3790 0FFE28E4 0FFE2D54 0FFD4600 0FFCABC8 0FFC162C

Program Check Exception

**bleep**: 0

 

How do I go about exporting my code warrior application so that I can
run it as stand-alone on a U-Boot based target?  Thanks so much

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.denx.de/pipermail/u-boot/attachments/20080723/9bccb44d/attachment.htm