[U-Boot-Users] Low-boot configuration for MPC8272ADS

[Dmytro Bablinyuk]

I've seen one thread on this subject
http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/19224
and tried to repeat the same trick.

1. I have updated (latest snapshot) u-boot:

include/configs/MPC8260ADS.h

  #define CFG_HRCW_MASTER 0x0e72b605

board/mpc8260ads/config.mk

   TEXT_BASE = 0xff800000

2. Using BDI2000 (MPC8272ADS JP9 is configured to take Hard Reset 
Configuration source from BCSR - otherwise board keep reseting)
  8272>load
  8272>unlock 0xff800000 0x40000 32
  8272>erase 0xFF800000 BLOCK
  8272>prog 0xFF800000 u-boot.bin BIN

3. Change JP9 to take Hard Reset Configuration from FLASH (SW2 Boot 
Source is FLASH)

After power cycling BDI and board - the board keep reseting (BDI is 
attached to the board). Yes, 0xFFF00100 is not valid breakpoint anymore 
- I guess it should be something like 0x00000100.
But I suspect even I got u-boot wrong BDI still should "freeze" the 
board instead of reseting. Is anyone got BDI and u-boot working on 
MPC8272ADS in low boot mode?
Any help is really appreciated.
Below is output of BDI while reseting and BDI init from config file.

...
*** TARGET: reset detected, restarting target
- BDI asserts HRESET
- Reset JTAG controller passed
- Bypass check: 0x00000001 => 0x00000001
- JTAG exists check passed
- COP status is 0x01
- Check running state passed
- BDI scans COP freeze command
- BDI removes HRESET
- Target PVR is 0x80822014
- Target SVR is 0x00000000
- COP status is 0x05
- Check stopped state passed
- Check LSRL length passed
- BDI sets breakpoint at 0xFFF00100
- BDI resumes program execution
- Waiting for target stop passed
- TARGET: Target PVR is 0x80822014
- TARGET: resetting target passed
- TARGET: processing target startup ....
- TARGET: processing target startup passed

Here is the init core from BDI config:

[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