Is CCSRBAR relocation broken on P2020?

U-Boot Felix Radensky 2 participants 2 messages Nov 10, 2011 1 message not in the archive

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Felix Radensky

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2011-11-10 20:07 UTC #1 lore raw

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Hi Ira,

Quoted 26 lines · Felix Radensky

Hello Timur, Kumar, U-Boot List,
I'm working on porting U-Boot to the Freescale P2020 COM-Express board. See the ML post from 2011-09-27 titled "[PATCH 0/2] mpc85xx: support for
Freescale COM Express P2020".
When it was posted, the port was working on the top of tree U-Boot. This
included relocation of the CCSRBAR from the power on location of 0xff700000 to 0xffe00000.
Today I updated U-Boot to top of tree to address the comments in the initial mailing list posting. Upon attempting to boot the board, I get no console output. I have traced this to commit 6ca88b0958 ("powerpc/85xx: relocate CCSR before creating the initial RAM area").
Indeed, making sure that the code does not run by adding the following to my board config file causes U-Boot to start correctly. Though the CCSRBAR is not relocated, as expected.
#define CONFIG_SYS_CCSR_DO_NOT_RELOCATE
As an alternative, reverting the commit causes my board to work again. The CCSRBAR is relocated correctly.

Quoted 8 lines

The P2020DS board is very similar to the board I am using. It performs the same relocation of the CCSRBAR that I want to use as well. Does anyone have a P2020DS that they can test with the current top of tree U-Boot? Does it boot? Can you send the output of "md ffe00000 1"?
Thanks,
Ira

I have P2020DS and can test it. Which configuration exactly, P2020DS or P2020DS_SDCARD ?

Felix.

Ira W. Snyder

2011-11-10 20:48 UTC #2 lore raw

Quoted 34 lines · Felix Radensky

Hi Ira,
Quoted 31 lines · Felix Radensky
Hello Timur, Kumar, U-Boot List,
I'm working on porting U-Boot to the Freescale P2020 COM-Express board. See the ML post from 2011-09-27 titled "[PATCH 0/2] mpc85xx: support for
Freescale COM Express P2020".
When it was posted, the port was working on the top of tree U-Boot. This
included relocation of the CCSRBAR from the power on location of 0xff700000 to 0xffe00000.
Today I updated U-Boot to top of tree to address the comments in the initial mailing list posting. Upon attempting to boot the board, I get no console output. I have traced this to commit 6ca88b0958 ("powerpc/85xx: relocate CCSR before creating the initial RAM area").
Indeed, making sure that the code does not run by adding the following to my board config file causes U-Boot to start correctly. Though the CCSRBAR is not relocated, as expected.
#define CONFIG_SYS_CCSR_DO_NOT_RELOCATE
As an alternative, reverting the commit causes my board to work again. The CCSRBAR is relocated correctly.
The P2020DS board is very similar to the board I am using. It performs the same relocation of the CCSRBAR that I want to use as well. Does anyone have a P2020DS that they can test with the current top of tree U-Boot? Does it boot? Can you send the output of "md ffe00000 1"?

Quoted 7 lines

Quoted 3 lines
Thanks,
Ira
I have P2020DS and can test it. Which configuration exactly, P2020DS or P2020DS_SDCARD ?

The issue I've had with CCSR relocation has been fixed by Timur's patchset titled "powerpc/85xx: fix definition of MAS register macros". So you don't really need to test this.

If you'd like to test it anyway, use P2020DS_SDCARD, where you use the boot_format tool + configuration file to write the U-Boot image to the SD card. It should be booting with the help of the Freescale On-Chip ROM.

Thanks,
Ira