U-Boot problems with MPC8272ADS

[Manil Gaouar]

Hi all,

 

I have a MPC8272ADS evaluation board from Motorolla. I am trying to run
U-Boot and Linux kernel 2.6 on it. I am using the 4.1 ELDK, U-Boot from
the git repos, and Linux kernel 2.6 from git repos.

 

I am burning U-Boot into the flash using a BDI2000.

 

My problem is: 

 

1-       When burning the U-Boot and setting the jumper JP9 in BSCR
everything works fine, I reboot the board and the memory at 0xfff00000
is locked which probably means that U-Boot is running, but I have no
display on my serial link (running cu S0 at 115200).

2-       When I put the jumper JP6 in memory position the card keeps
resetting and I have a message error if I connect the BDI to the board
saying:

 

- TARGET: processing user reset request

- BDI asserts HRESET

- Reset JTAG controller passed

- Bypass check: 0x00000001 => 0x00000001

- JTAG exists check passed

- COP status is 0x7D

- Check running state failed

- TARGET: Target PVR is 0x80822014

*** TARGET: resetting target failed

# PPC: unexpected response from target

- TARGET: target will be restarted in 10 sec

8272>

 

And it keeps resetting and same message again and again.

 

Here is my BDI CFG file:

 

; bdiGDB configuration file for MPC8272ADS board

; ----------------------------------------------

[INIT]

; init core register

WREG    MSR             0x00001002      ;MSR  : ME,RI

WM32         0x0F010004      0xFFFFFFC3     ;SYPCR: disable watchdog

WM32         0x0F0101A8      0x04700000       ;IMMR : internal space @
0x04700000

WM32         0x04710024       0x100C0000      ;BCR  : Single PQ2, ..

WM32         0x04710c94       0x00000001       ;RMR  : checkstop reset
enable

; init memory controller

 

WM32         0x04710104       0xFF800876      ;OR0: Flash 8MB, CS early
negate, 11 w.s., Timing relax

WM32         0x04710100       0xFF801801      ;BR0: Flash @0xFF800000,
32bit, no parity

WM32         0x0471010C      0xFFFF8010      ;OR1: BCSR 32KB, all types
access, 1 w.s.

WM32         0x04710108       0x04501801       ;BR1: BCSR @0x04500000,
32bit, no parity

WM32         0x04710124       0xFFFF8866      ;OR4: EEPROM 32KB, all
types access, 6 w.s.

WM32         0x04710120       0xC2000801      ;BR4: EEPROM @0xC2000000,
8bit, no parity

; init SDRAM Init (PPC bus)

WM16         0x04710184       0x2800          ;MPTPR: Divide Bus clock
by 41

WM8          0x0471019C      0x13             ;PSRT : Divide MPTPR
output by 20

WM32         0x04710114       0xfe002ec0        ;OR2  : 32MB, 2 banks,
row start at A9, 11 rows

WM32         0x04710110       0x00000041       ;BR2  : SDRAM
@0x00000000, 64bit, no parity

WM32         0x04710190       0x824b36a3       ;PSDMR: Precharge all
banks

WM32         0x04710190       0xaa4b36a3

WM8          0x00000000       0x00             ;Access SDRAM

WM32         0x04710190       0x8a4b36a3       ;PSDMR: CBR Refresh

WM8          0x00000000       0xFF             ;Access SDRAM

WM8          0x00000000       0xFF             ;Access SDRAM

WM8          0x00000000       0xFF             ;Access SDRAM

WM8          0x00000000       0xFF             ;Access SDRAM

WM8          0x00000000       0xFF             ;Access SDRAM

WM8          0x00000000       0xFF             ;Access SDRAM

WM8          0x00000000       0xFF             ;Access SDRAM

WM8          0x00000000       0xFF             ;Access SDRAM

WM32         0x04710190       0x9a4b36a3       ;PSDMR: Mode Set

WM8          0x00000190       0x00             ;Access SDRAM

WM32         0x04710190       0xc24b36a3       ;PSDMR: enable refresh,
normal operation

[TARGET]

CPUTYPE     8272        ;the CPU type

JTAGCLOCK   0           ;use 16 MHz JTAG clock

POWERUP     7000        ;start delay after power-up detected in ms

BOOTADDR    0xfff00100  ;boot address used for start-up break

WORKSPACE   0x04700000            ;workspace in target RAM for fast
download

;MEMDELAY    2000        ;additional memory access delay

 

[HOST]

IP          172.16.0.120

FILE        u-boot.bin

FORMAT      BIN

;FILE        E:\temp\test16k.bin

;FORMAT      BIN 0x04708000

LOAD        MANUAL      ;load code MANUAL or AUTO after reset

DEBUGPORT   2001

PROMPT      8272> ;new prompt for Telnet

;DUMP        /home/solacom/bdi/dump.bin

[FLASH]

CHIPTYPE    I28BX8            ; Flash type

CHIPSIZE    0x200000          ; Single chip size (2 Mbyte)

BUSWIDTH    32                  ; total width for the whole SIMM

WORKSPACE   0x04700000            ;workspace in target RAM for fast
download

FILE        /home/solacom/bdi/1MB_junk.bin

FORMAT      BIN 0xFF800000

ERASE       0xFF800000  ;erase sector  4 of flash SIMM

ERASE       0xFF840000  ;erase sector  5 of flash SIMM

ERASE       0xFF880000  ;erase sector  6 of flash SIMM

ERASE       0xFF8C0000  ;erase sector  7 of flash SIMM

[REGS]

DMM1        0x04700000

FILE        reg8272.def

 

Here are the commands I used to upload the U-Boot:

 

8272>unlock

8272>erase

8272>erase 0xfff00000

8272>prog 0xfff00000 u-boot.bin

The prgrammation goes fine.

When I do a 8272>md 0xfff00000 I have the same data as the beginning of
the u-boot.bin, which means that my upload is correct.

 

Can you help me on this please? My TEXT_BASE is 0xFFF00000 which means
u-boot run from flash, but putting JP9 means running from RAM right?

 

I am confused about this, I've read a tutorial www.jungo.com/openrg/doc/
4.7/installation_guide/pdf/ppc.pdf and followed their steps to start
U-Boot, but I can not see the U_Boot prompt, may be U-Boot is not
running, I have no clue...Can we know when U-Boot is not running without
display?

 

Thx for any help...

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