Changing the C6A8168 Memory Map

Lee Holeva

Genius 4615 points

I see this statement in the description of the EZSDK Memory Map:

Linux Memory

LINUX_MEM_2

324 MB

0x9F900000

Second memory segment given to Linux Memory Manager in Kernel

Does this mean that there is a menuconfig selection of the linux memory map? I've looked in menuconfig and I do not see such a selection. I currently have the base linux memory set to 364M using mem=364M in the bootargs. I am wondering whether using parts of the above region for shared memory is causing activities in the DSP, writting to shared memory allocated within the above region, to step on activities within Linux, on the host.

Lee

over 14 years ago

0 Siddharth Heroor over 14 years ago

TI__Expert 4245 points

Hi Lee,

You don't need to recompile the linux kernel to use the additional memory. Passing MEM=xyz in the bootargs automatically sets up the linux memory. For Example, you could use MEM=256M@0x80000000 MEM=324M@0x9F900000 will set up the second memory segment of 324 MB. More details can be found in the PSP user guide at http://processors.wiki.ti.com/index.php/DM816x_AM389x_PSP_User_Guide#Setting_Memory_Holes_For_System_RAM

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Changing the C6A8168 Memory Map