ibl for 6678 custom board

GANG ZHANG48047

Hi, I want to boot 6678 via nand flash in our custom board with IBL. I have browsed the source files under tools/boot_loader/ibl/src, I have some questions:

1. Since the frequency of the input clock for 6678 in our board has changed, which file should I change to configure the PLLs properly? Should I only change the parameters in function c6678_ibl_config() in device.c?

2. under tools/boot_loader/ibl/src/util/iblConfig/src, there is a file iblConfig.c, the main() function in it opens a file called "input.txt", should I create this file with the "input-example.txt" to tell which device I am using? what's the meaning of "offset" in it?

3. under tools/boot_loader/ibl/src/main, two main() functions in iblinit.c and iblmain.c sperately, when ibl booting, does the main() in iblinit.c exec first, and then main() in iblmain.c? I noticed t hat in iblinit.c there is a PLL initial function devicePllConfig(), why there is a function called deviceDdrconfig() in iblmain.c also configuring PLL?

thanks.

over 11 years ago

0 Raja over 11 years ago

TI__Guru* 81335 points

Hi Gang,

Please refer below post from Rahul.

http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/284018/991237.aspx#991237

Please come back here if you need more information on custom IBL.

Thank you .

0 GANG ZHANG48047 over 11 years ago in reply to Raja

Intellectual 875 points

Hi, Rajasekaran. Thanks for your reply. I have installed the mcsdk and read your link, but didn't find my answer. can you please just answer my questions directly?

0 Raja over 11 years ago in reply to GANG ZHANG48047

TI__Guru* 81335 points

Hi Gang,

I am working with expert to answer your query. Thank you for your patience.

0 Rahul Prabhu over 11 years ago

TI__Guru** 116740 points

1. Yes, Main PLL Pre div and multipliers to get 1GHZ from 100 Mhz input clock are defined in the function c6678_ibl_config. Please chnage the Clocking in this function based on your input clock.

2. The input.txt was created primarliy only for providing the serverip, ipaddr, gateway-ip for ethernet ot TFTP boot with the IBL. You don`t need to change this file.The use of input.txt file has been demonstarted in the MCDK user guide in the IBL section :

http://processors.wiki.ti.com/index.php/BIOS_MCSDK_2.0_User_Guide#Intermediate_Boot_Loader_.28IBL.29_and_Examples

Look under the section" Updating the IBL Ethernet Configurations". Offset typically referes to offset in the IBL binary where the boot configuration is stored. For all keystone I devices offset for ethernet paramaters is 0x500.

For your usecase please don`t modify this file that is defined under

C:\ti\mcsdk_2_01_02_06\tools\boot_loader\ibl\src\util\iblConfig\build

3. The IBL boot process has been descirbed in the iblinit.c file.

The IBL loads itself in a two stage process. The ROM boot loader loads this first stage IBL first.
This first loader reads the IBL parameters, and will endian switch them if required. The PLL is configured if indicated by the parameters. The I2C block which contains the I2C EEPROM address for both the big and little endian images is then read. Based on the endianness of the device the rest of the IBL is read from the I2C EEPROM, and execution is transferred to the full IBL.

So To answer your question main in iblinit is run first from the first stage before main in the iblmain is run.

Regards,

Rahul

PS:

GANG,

Please open a single thread for all IBL related questions as it is easier to track.

Processors

Processors forum

ibl for 6678 custom board