[U-Boot] U-Boot stuck after relocation attempt on MX51 board

[DaveKucharczyk <david.kucharczyk@gmail.com>]

I'm porting U-Boot for an MX51 based board. 

This is the boot sequence with debug on...

U-Boot 2014.07-svn10 (Feb 24 2015 - 15:49:39)

initcall: 9ff85820
U-Boot code: 9FF80000 -> 9FFA6824  BSS: -> 9FFD944C
initcall: 9ff8118c
CPU:   Freescale i.MX51 rev3.0 at 800 MHz
initcall: 9ff858ac
I2C:   ready
initcall: 9ff85894
DRAM:  initcall: 9ff81ff4
initcall: 9ff85a04
Monitor len: 0005944C
Ram size: 10000000
Ram top: A0000000
initcall: 9ff855b0
initcall: 9ff857c8
TLB table from 9fff0000 to 9fff4000
initcall: 9ff855c8
initcall: 9ff8577c
Reserving 357k for U-Boot at: 9ff96000
initcall: 9ff85750
Reserving 1280k for malloc() at: 9fe56000
initcall: 9ff85850
Reserving 88 Bytes for Board Info at: 9fe55fa8
initcall: 9ff855d0
initcall: 9ff8571c
Reserving 216 Bytes for Global Data at: 9fe55ed0
initcall: 9ff856b8
initcall: 9ff855e4
initcall: 9ff859ec
initcall: 9ff85948

RAM Configuration:
Bank #0: 90000000 256 MiB
 
DRAM:  256 MiB
initcall: 9ff8569c
New Stack Pointer is: 9fe55eb0
initcall: 9ff85618
initcall: 9ff85648
Relocation Offset is: 00016000
Relocating to 9ff96000, new gd at 9fe55ed0, sp at 9fe55eb0

And that's where it hangs and resets in a continuous loop. 

I confirmed that the entire init_sequence completed in board_f.c, but never
makes it to board_r.c

So...according to ./arch/arm/lib/crt0.S ...

/* assembly code */

board_init_f          <--we make it out of here

/* assembly code */   <-- stuck somewhere in here

relocate_code           <-- stuck somewhere in here

/* assembly code */   <-- stuck somewhere in here

board_init_r          <--we never make it here

I can't sprinkle any debug statements where it's stuck because it's all
assembly. Before I break out the BDI tomorrow does anyone have any ideas? 

BTW it works on our 512MB board, but not the 256MB board. Thanks.



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