ARM DSP application loading in OMAPL138

Tinu Varghese

Other Parts Discussed in Thread: OMAPL138

Hi,

Currently I'm working on secondary boot loader development for OMAPL138 board.

I have a doubt about the loading of application, from the forum i came to know that the secondary boot loader is responsible for loading App to the RAM .But in my system i have ARM App as well DSP app. And I need to load the application to the corresponding RAM , ie ARM app to the ARM RAM and DSP app to the DSP RAM.

I'm assuming that In flash memory my application is located as whole (DSP and ARM) .

So how can i differentiate both app from the flash memory so that i can load them in its corresponding memory...?

THANK YOU.

over 11 years ago

0 Sivaraj Kuppuraj over 11 years ago

TI__Mastermind 35645 points

Hi Tinu,

We are working on it and we will get back to you as soon as possible.

Thanks & regards,

Sivaraj K

0 Shankari G over 11 years ago

TI__Mastermind 43955 points

Hi TInu,

The ARM UBL is provided as a sample secondary bootloader for OMAPL138 LCDK as a part of OMAPL138 Starterware Code. Using this, you can give the entry point of ARM app and DSP app in bl_main.c.

Detailed steps are given at the following thread which talks about booting the DSP app using secondary bootloader.

http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/p/349268/1223040.aspx#1223040

In addition to DSP app boot, ARM app boot can also be done by modifying the code of SBL like below:

******************************************************************************
**                     Global Variable Definitions
*******************************************************************************/

unsigned int entryPoint = 0xc1080000; // // This is the sample entry point address of ARM app which is 1KB aligned.
unsigned int DspEntryPoint =0xc009b800; // This is the sample entry point address of DSP app which is 1KB aligned.

The Wiki page below will also be of some help to you.

http://processors.wiki.ti.com/index.php/OMAPL138_StarterWare_Booting_And_Flashing#Booting_an_ARM.2BDSP_System

Regards,

Shankari

-------------------------------------------------------------------------------------------------------

Please click the Verify Answer button on this post if it answers your question.
--------------------------------------------------------------------------------------------------------

Processors

Processors forum

ARM DSP application loading in OMAPL138