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

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

[Dmytro Bablinyuk]

> 1. I have updated (latest snapshot) u-boot:
> 
> include/configs/MPC8260ADS.h
> 
>  #define CFG_HRCW_MASTER 0x0e72b605
> 
> board/mpc8260ads/config.mk
> 
>   TEXT_BASE = 0xff800000

1. I tried 'make MPC8272ADS_lowboot_config' but it keeps resetting with 
or without BDI attached (JP9 in position MEMORY, SW2 is FLASH ON).

2. Burn (to burn I need to move JP9 in position BCSR, otherwise it's 
just resetting)
  8272>load
  8272>unlock 0xff800000 0x40000 32
  8272>erase 0xFF800000 BLOCK
  8272>prog 0xFF800000 u-boot.bin BIN

3. Move JP9 in position MEMORY

4. Power cycle

5. Board keeps resetting with or without BDI.

Can anybody help, please?
Thank you

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

[Bastos Fernandez Alexandre]

Dmytro,

Please apply my patch with Flash HRCW for MPC8272ADS and try
then the MPC8272ADS_lowboot_config. This worked fine for me

http://article.gmane.org/gmane.comp.boot-loaders.u-boot/19395

Best regards

Alex BASTOS

> -----Original Message-----
> To: u-boot-users at lists.sourceforge.net
> From:  Dmytro Bablinyuk <dmytro.bablinyuk@rftechnology.com.au>
> Date:  Wed, 02 Nov 2005 16:39:12 +1100
> Subject: [U-Boot-Users] Re: Low-boot configuration for MPC8272ADS
> 
> 
> > 1. I have updated (latest snapshot) u-boot:
> > 
> > include/configs/MPC8260ADS.h
> > 
> >  #define CFG_HRCW_MASTER 0x0e72b605
> > 
> > board/mpc8260ads/config.mk
> > 
> >   TEXT_BASE = 0xff800000
> 
> 1. I tried 'make MPC8272ADS_lowboot_config' but it keeps resetting with 
> or without BDI attached (JP9 in position MEMORY, SW2 is FLASH ON).
> 
> 2. Burn (to burn I need to move JP9 in position BCSR, otherwise it's 
> just resetting)
>   8272>load
>   8272>unlock 0xff800000 0x40000 32
>   8272>erase 0xFF800000 BLOCK
>   8272>prog 0xFF800000 u-boot.bin BIN
> 
> 3. Move JP9 in position MEMORY
> 
> 4. Power cycle
> 
> 5. Board keeps resetting with or without BDI.
> 
> Can anybody help, please?
> Thank you
> 
> 
> 
> 

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

[Dmytro Bablinyuk]

> 
> Please apply my patch with Flash HRCW for MPC8272ADS and try
> then the MPC8272ADS_lowboot_config. This worked fine for me
> 
> http://article.gmane.org/gmane.comp.boot-loaders.u-boot/19395
> 
Thank you very much Alex,

As I understand, there is a patch that is not included in current u-boot 
snapshot.
Sorry, could you please attach that patch or post a link (the link above 
is a link to my original message).
Do you know why BDI keeps resetting - is it because HRCW couldn't be 
read? What about if flash is blank?

Thank you

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

[Alexandre BASTOS]

Sorry,

Yesterday I was on holidays, so "monday morning effects" also in
wednesday. The link to my submmit to Wolfgang with the patch

http://article.gmane.org/gmane.comp.boot-loaders.u-boot/19108

Best regards,

Alex

Citando Dmytro Bablinyuk <dmytro.bablinyuk@rftechnology.com.au>:

>
> >
> > Please apply my patch with Flash HRCW for MPC8272ADS and try
> > then the MPC8272ADS_lowboot_config. This worked fine for me
> >
> > http://article.gmane.org/gmane.comp.boot-loaders.u-boot/19395
> >
> Thank you very much Alex,
>
> As I understand, there is a patch that is not included in current u-boot
> snapshot.
> Sorry, could you please attach that patch or post a link (the link above
> is a link to my original message).
> Do you know why BDI keeps resetting - is it because HRCW couldn't be
> read? What about if flash is blank?
>
> Thank you
>

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

[Dmytro Bablinyuk]

> 
> Yesterday I was on holidays, so "monday morning effects" also in
> wednesday. The link to my submmit to Wolfgang with the patch
> 
> http://article.gmane.org/gmane.comp.boot-loaders.u-boot/19108
> 

Hi Alex,
Sorry for delay, in Sydney we have 8.40am - just came to work.
YES, IT'S WORKING (after applying your patch) WITH AND WITHOUT BDI!!

Thank you very much Alex and thank you very much Yuli - you were right 
all my problems were due to wrong value of HRCW

One more question, so it looks like BDI was depending on HRCW  - on 
target board we would have a blank flash - how do we burn it using BDI 
(at first time we will not have a HRCW in it)?

 > As you say "the classical" ads8272 without BCSR, do you mean same
 > flash module, SDRAM specs, phytters, etc.?
Apart from flash, everyting else will be the same. We will use P30 flash 
from Intel. I expected that I will need to do some work on it. Most of 
the worries were about BCSR. So, I just was wondering how easy would be 
to make u-boot not to use BCSR. eg. CS0 - flash, CS1 - SDRAM ...

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

[Jerry Van Baren]

Dmytro Bablinyuk wrote:
>>
>> Yesterday I was on holidays, so "monday morning effects" also in
>> wednesday. The link to my submmit to Wolfgang with the patch
>>
>> http://article.gmane.org/gmane.comp.boot-loaders.u-boot/19108
>>
> 
> Hi Alex,
> Sorry for delay, in Sydney we have 8.40am - just came to work.
> YES, IT'S WORKING (after applying your patch) WITH AND WITHOUT BDI!!
> 
> Thank you very much Alex and thank you very much Yuli - you were right 
> all my problems were due to wrong value of HRCW
> 
> One more question, so it looks like BDI was depending on HRCW  - on 
> target board we would have a blank flash - how do we burn it using BDI 
> (at first time we will not have a HRCW in it)?
> 
>  > As you say "the classical" ads8272 without BCSR, do you mean same
>  > flash module, SDRAM specs, phytters, etc.?
> Apart from flash, everyting else will be the same. We will use P30 flash 
> from Intel. I expected that I will need to do some work on it. Most of 
> the worries were about BCSR. So, I just was wondering how easy would be 
> to make u-boot not to use BCSR. eg. CS0 - flash, CS1 - SDRAM ...

For blank flash, you need to pull up the RSTCONF* line (8260UM 5.4.2.1 
"Single MPC8260 with Default Configuration") which will set your HRCW to 
all zeros rather than read it from memory (I'm assuming you are not 
implementing the BCSR).

This will require a different BDI2000 config file because the ISB will 
be set to 0x0000_0000 - if the first line in your special BDI config 
file sets the ISB back to your prefered value (0xF000_0000?), you should 
be able to leave all the rest of your config file the same.

At this point, you should be able to program flash.  After programming 
flash, I go back to normal mode (RSTCONF* pulled low) and _power cycle_ 
the board.  Note that the HRCW is only read on a power cycle, not on a 
software reset.

YMMV (Your Magic May Vary ;-)

gvb

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

[Dan Malek]

On Nov 2, 2005, at 4:55 PM, Dmytro Bablinyuk wrote:

> One more question, so it looks like BDI was depending on HRCW  - on 
> target board we would have a blank flash - how do we burn it using BDI 
> (at first time we will not have a HRCW in it)?

The newest version of BDI firmware has the ability to set a HRCW out of 
reset,
so no more worries about flash contents or reset configuration.


	-- Dan

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

[Dmytro Bablinyuk]

> For blank flash, you need to pull up the RSTCONF* line (8260UM 5.4.2.1 
> "Single MPC8260 with Default Configuration") which will set your HRCW to 
> all zeros rather than read it from memory (I'm assuming you are not 
> implementing the BCSR).
> 
> This will require a different BDI2000 config file because the ISB will 
> be set to 0x0000_0000 - if the first line in your special BDI config 
> file sets the ISB back to your prefered value (0xF000_0000?), you should 
> be able to leave all the rest of your config file the same.

Thank you Jerry,

This removes some magic!
Do you know by any chance what the reason can be for

8272>load
Loading u-boot.bin , please wait ....
# PPC: timeout while waiting for freeze
*** TARGET: reset detected, restarting target
...

I have HRCW 0x0E74B20A, (ISB100), so I have changed my BDI config
; init core register
WREG    MSR             0x00001002      ;MSR  : ME,RI
WM32    0xF0010004      0xFFFFFFC3      ;SYPCR: disable watchdog
WM32    0xF00101A8      0x04700000      ;IMMR : internal space @ 0x04700000
..

'md', some other commands work fine but 'load' is 'timing out'?
u-boot as stand alone starts without problems (HRCW come from flash), 
BDI is not resetting anymore apart from case when I do 'load'.

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

[Jerry Van Baren]

Dmytro Bablinyuk wrote:
> 
>> For blank flash, you need to pull up the RSTCONF* line (8260UM 5.4.2.1 
>> "Single MPC8260 with Default Configuration") which will set your HRCW 
>> to all zeros rather than read it from memory (I'm assuming you are not 
>> implementing the BCSR).
>>
>> This will require a different BDI2000 config file because the ISB will 
>> be set to 0x0000_0000 - if the first line in your special BDI config 
>> file sets the ISB back to your prefered value (0xF000_0000?), you 
>> should be able to leave all the rest of your config file the same.
> 
> 
> Thank you Jerry,
> 
> This removes some magic!
> Do you know by any chance what the reason can be for
> 
> 8272>load
> Loading u-boot.bin , please wait ....
> # PPC: timeout while waiting for freeze
> *** TARGET: reset detected, restarting target
> ...
> 
> I have HRCW 0x0E74B20A, (ISB100), so I have changed my BDI config
> ; init core register
> WREG    MSR             0x00001002      ;MSR  : ME,RI
> WM32    0xF0010004      0xFFFFFFC3      ;SYPCR: disable watchdog
> WM32    0xF00101A8      0x04700000      ;IMMR : internal space @ 0x04700000
> ..
> 
> 'md', some other commands work fine but 'load' is 'timing out'?
> u-boot as stand alone starts without problems (HRCW come from flash), 
> BDI is not resetting anymore apart from case when I do 'load'.

Just guesses here...

Is this with an erased flash or with a flash with a HRCW programmed?

When you pull RSTCONF* high, your IMMR is set to 0x00000000.  This is 
quite likely _not_ what you want, so you are going to have to fix up 
some registers.

In your snippet above, you will need to change:
WM32    0x00010004      0xFFFFFFC3      ;SYPCR: disable watchdog
WM32    0x000101A8      0x04700000      ;IMMR : internal space @ 0x04700000

You need to review every field in the HRCW and verify a value of 0 is OK 
or initialize the related registers in your BDI config file.  I don't 
know enough (and am not paid enough ;-) to do this.

gvb

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

[Wolfgang Denk]

In message <436944AB.7040808@rftechnology.com.au> you wrote:
> 
> 8272>load
> Loading u-boot.bin , please wait ....
> # PPC: timeout while waiting for freeze
> *** TARGET: reset detected, restarting target
> ...

"load", i. e. load to RAM. Or did you intend to write "prog" here, i.
e. prgram the (previously erased) flash?

> I have HRCW 0x0E74B20A, (ISB100), so I have changed my BDI config
> ; init core register
> WREG    MSR             0x00001002      ;MSR  : ME,RI
> WM32    0xF0010004      0xFFFFFFC3      ;SYPCR: disable watchdog
> WM32    0xF00101A8      0x04700000      ;IMMR : internal space @ 0x04700000
> ..

Did you set up your memory controller and  correctly  initialize  the
SDRAM?

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
There are three ways to get something done:
        (1) Do it yourself.
        (2) Hire someone to do it for you.
        (3) Forbid your kids to do it.

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

[Dmytro Bablinyuk]

> 
> Is this with an erased flash or with a flash with a HRCW programmed?
> 
This is with a flash with HRCW programmed. U-boot starts fine.
But BDI on 'load'
8272>load
Loading u-boot.bin , please wait ....
# PPC: timeout while waiting for freeze
*** TARGET: reset detected, restarting target
...

Here is the HRCW (from flash). 0x74 => ISB100 => IMMR=0xF000_0000

8272>md 0
00000000 : ff0e0e0e 0e0e0e0e 74747474 74747474  ........tttttttt
00000010 : b2b2b2b2 b2b2b2b2 0a0a0a0a 0a0a0a0a  ................

And BDI config (we use CLKIN 66MHz, but it is the same effect with CLKIN 
100MHz)

; bdiGDB configuration file for MPC8272ADS board
; ----------------------------------------------
;

[INIT]
; init core register
;WREG    MSR             0x00001002      ;MSR  : ME,RI
WM32	0xF0010004	0xFFFFFFC3	;SYPCR: disable watchdog
WM32	0xF00101A8	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
MMU         XLAT        ; support virtual addresses (for Linux!)
BDIMODE     AGENT       ;the BDI working mode (LOADONLY | AGENT)
BREAKMODE   HARD        ;SOFT or HARD, HARD uses PPC hardware breakpoints
PTBASE      0x000000F0  ; ptr to page table pointers

[HOST]
IP          192.168.1.100
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        dump.bin

[FLASH]
CHIPTYPE    I28BX8     	; Flash type
CHIPSIZE    0x800000	; Single chip size (8 Mbyte)
BUSWIDTH    32		; total width for the whole SIMM
WORKSPACE   0x04700000	;workspace in target RAM for fast download
FILE        1MB_junk.bin
FORMAT      BIN 0xFF900000

ERASE       0xFF900000  ;erase sector  4 of flash SIMM
ERASE       0xFF940000  ;erase sector  5 of flash SIMM
ERASE       0xFF980000  ;erase sector  6 of flash SIMM
ERASE       0xFF9C0000  ;erase sector  7 of flash SIMM


[REGS]
DMM1        0x04700000
FILE        reg8272.def

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

[Dmytro Bablinyuk]

> 
>>8272>load
>>Loading u-boot.bin , please wait ....
>># PPC: timeout while waiting for freeze
>>*** TARGET: reset detected, restarting target
>>...
> 
> 
> "load", i. e. load to RAM. Or did you intend to write "prog" here, i.
> e. prgram the (previously erased) flash?

I meant 'load' to RAM.
I tried to burn u-boot into flash and tried to make this sequence

8272>load
8272>unlock 0xff800000 0x40000 32
8272>erase 0xFF800000 BLOCK
8272>prog 0xFF800000 u-boot.bin BIN

> 
> 
> Did you set up your memory controller and  correctly  initialize  the
> SDRAM?

If I put JP9 in position BCSR everything works fine (if I move IMMR in 
BDI config back to 0x0F000_0000 of course).

Here is the HRCW (from flash). 0x74 => ISB100 => IMMR=0xF000_0000

8272>md 0
00000000 : ff0e0e0e 0e0e0e0e 74747474 74747474  ........tttttttt
00000010 : b2b2b2b2 b2b2b2b2 0a0a0a0a 0a0a0a0a  ................

And BDI config (we use CLKIN 66MHz, but it is the same effect with CLKIN 
100MHz - I tried different crystal)

; bdiGDB configuration file for MPC8272ADS board
; ----------------------------------------------
;

[INIT]
; init core register
;WREG    MSR             0x00001002      ;MSR  : ME,RI
WM32    0xF0010004    0xFFFFFFC3    ;SYPCR: disable watchdog
WM32    0xF00101A8    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
MMU         XLAT        ; support virtual addresses (for Linux!)
BDIMODE     AGENT       ;the BDI working mode (LOADONLY | AGENT)
BREAKMODE   HARD        ;SOFT or HARD, HARD uses PPC hardware breakpoints
PTBASE      0x000000F0  ; ptr to page table pointers

[HOST]
IP          192.168.1.100
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        dump.bin

[FLASH]
CHIPTYPE    I28BX8         ; Flash type
CHIPSIZE    0x800000    ; Single chip size (8 Mbyte)
BUSWIDTH    32        ; total width for the whole SIMM
WORKSPACE   0x04700000    ;workspace in target RAM for fast download
FILE        1MB_junk.bin
FORMAT      BIN 0xFF900000

ERASE       0xFF900000  ;erase sector  4 of flash SIMM
ERASE       0xFF940000  ;erase sector  5 of flash SIMM
ERASE       0xFF980000  ;erase sector  6 of flash SIMM
ERASE       0xFF9C0000  ;erase sector  7 of flash SIMM


[REGS]
DMM1        0x04700000
FILE        reg8272.def

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

[Wolfgang Denk]

In message <436950A4.3070002@rftechnology.com.au> you wrote:
> 
> >>8272>load

No load address given here.

> [HOST]
> IP          192.168.1.100
> FILE        u-boot.bin
> FORMAT      BIN
> ;FILE        E:\temp\test16k.bin
> ;FORMAT      BIN 0x04708000

No load address given here either. So where are you going to load the
code to?

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
If in any problem you find yourself doing an immense amount of  work,
the answer can be obtained by simple inspection.

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

[Dmytro Bablinyuk]

> 
>>>>8272>load
> 
> No load address given here.
> 
>>[HOST]
>>IP          192.168.1.100
>>FILE        u-boot.bin
>>FORMAT      BIN
>>;FILE        E:\temp\test16k.bin
>>;FORMAT      BIN 0x04708000
> 
> No load address given here either. So where are you going to load the
> code to?
Thank you Wolfgang,

Sorry for asking, I tried 'load 0x1000' (this is where I expect to have 
my SDRAM), the problem remains - can you suggest please what sort of 
address I should try?


8272>load 0x1000
Loading u-boot.bin , please wait ....
# PPC: timeout while waiting for freeze
*** TARGET: reset detected, restarting target
...

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

[Dmytro Bablinyuk]

Thank you again Wolfgang, and thank you very much to everybody who was 
involved in this discussion.

I got everything working.
I would like to summarise output of this discussion - it might be useful 
to somebody else in the future. Please correct me if I am wrong.

_MPC8272ADS_in_low_boot_mode_ (HRCW comming from flash)

(1). Apply patch from Alexandre Bastos (valid for u-boot snapshot from 2 
November 2005, thank you Alex)

http://article.gmane.org/gmane.comp.boot-loaders.u-boot/19108

*MPC8272ADS Flash HRCW 0x0E74B20A

(2). Compile 'make MPC8272ADS_lowboot_config'

(3). Since our HRCW 0x0E74B20A (0x74 => ISB100 => IMMR=0xF000_0000) we 
need to change BDI2000 config file (thank you to Yuli Barcohen)

WM32    0xF0010004      0xFFFFFFC3   ;SYPCR: disable watchdog
WM32    0xF00101A8      0x04700000   ;IMMR : internal space @ 0x04700000

*Note I use default 0x04700000 for IMMR since it came like this.
Wrong HRCW value may cause board to continuously reset.

(4). Move JP9 in position MEMORY, make sure that SW2 Boot Source is ON 
(boot from flash)

(5). In BDI2000 config file change

BOOTADDR    0x00000100  ;boot address used for start-up break

(6). Burn software using BDI (thank you to Wolfgang Denk)

  8272>load 0
  8272>unlock 0xff800000 0x40000 32
  8272>erase 0xFF800000 BLOCK
  8272>prog 0xFF800000 u-boot.bin BIN

Make sure you use load address when loading to memory

i.e. 8272>load 0

If no load address is given or BOOTADDR different from 0x00000100 you 
may see message in BDI console

# PPC: timeout while waiting for freeze

(7). (Haven't tried yet). To program blank flash with 8272 ie. on target 
board without BCSR. (thank you to Jerry Van Baren)
--8<--
For blank flash, you need to pull up the RSTCONF* line (8260UM 5.4.2.1 
"Single MPC8260 with Default Configuration") which will set your HRCW to 
all zeros rather than read it from memory (I'm assuming you are not 
implementing the BCSR).

This will require a different BDI2000 config file because the ISB will 
be set to 0x0000_0000 - if the first line in your special BDI config 
file sets the ISB back to your prefered value (0xF000_0000?), you should 
be able to leave all the rest of your config file the same.

At this point, you should be able to program flash.  After programming 
flash, I go back to normal mode (RSTCONF* pulled low) and _power cycle_ 
the board.  Note that the HRCW is only read on a power cycle, not on a 
software reset.
--8<--

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

[Sam Song]

Dan Malek <dan@embeddededge.com> wrote:
> The newest version of BDI firmware has the ability
> to set a HRCW out of reset,so no more worries about 
> flash contents or reset configuration.

So in this case, RSTCONF* should be pulled to HIGH or
LOW?

Thanks,

Sam


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

[Dan Malek]

On Nov 3, 2005, at 10:39 PM, Sam Song wrote:

> So in this case, RSTCONF* should be pulled to HIGH or
> LOW?

I'm likely to have mis-spoken about this.  I have 83xx on the
brain and this feature was added to the PPC firmware to
support that.  I don't know if it's really applicable to any other
processor.  I'll experiment and see.

Apologies for any confusion.


	-- Dan

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

[Sam Song]

Dan Malek <dan@embeddededge.com> wrote:
> support that.  I don't know if it's really
> applicable to any other
> processor.  I'll experiment and see.

We'd like to be notified in your most convenience. 
My expecting result is that one config file can deal
with RSTCONF* LOW/HIGH cases for FLASH programming 
with this firmware:-)

Thanks,

Sam


	

	
		
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