CMEM Fail!!

Changsheng Li

When Run 138, CMEM ERROR appear.

DVSDK 4.01 Memory:256M and CMEM Not changed, it is default!

the log is:

CMEMK module: built on Mar 17 2014 at 19:16:08
Reference Linux version 2.6.33
File /work/dvsdk/linuxutils_2_25_05_11/packages/ti/sdo/linuxutils/cmem/src/module/cmemk.c
CMEM Range Overlaps Kernel Physical - allowing overlap
CMEM phys_start (0xc2000000) overlaps kernel (0xc0000000 -> 0xc4000000)
CMEMK Error: Failed to request_mem_region(0xc2000000, 18874368)
FATAL: Error inserting cmemk (/lib/modules/2.6.33-rc4/kernel/drivers/dsp/cmemk.ko): Bad address

Why? who can help me ?

Thanks.

over 11 years ago

0 Titusrathinaraj Stalin over 11 years ago

TI__Guru** 116100 points

Hi Li,

We have 2 options to resolve the issue,

1) Reduce the memory size which is mentioned in bootargs's "mem" variable

2) Try to avoid using default args which is used only for EVM boards and its configurations, and pass your manual configuration from the following links.

http://processors.wiki.ti.com/index.php/HOWTO_Change_the_Linux_Kernel_Start_Address#Updating_CMEM_Memory_Region

http://processors.wiki.ti.com/index.php/CMEM_Overview#Test_Setup_and_Validation_Process

Please refer "Linux Confuguration" and "General Purpose Heaps" sections in the below Wiki:

http://processors.wiki.ti.com/index.php/CMEM_Overview#Linux_Configuration

Please check the "Prerequisites" section in the below wiki, and if needed, you can also try rebuilding the CMEM module in your SDK installation

http://processors.wiki.ti.com/index.php/Example_DSPLIB/DSPLink_Application_on_OMAP-L1x

Please refer the build steps for CMEM in the below wiki:

http://processors.wiki.ti.com/index.php/Building_The_OMAP-L137_SDK#CMEM

Once the CMEM driver is built, the size and configuration of memory shall be configured via command line (during the 'insmod' of the CMEM driver)

http://processors.wiki.ti.com/index.php/CMEM_Overview#Test_Setup_and_Validation_Process

Refer the old ti e2e threads,

http://e2e.ti.com/support/dsp/omap_applications_processors/f/447/t/141528.aspx

http://e2e.ti.com/support/dsp/omap_applications_processors/f/447/t/130577.aspx

http://e2e.ti.com/support/dsp/omap_applications_processors/f/447/t/129980.aspx

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/537/t/109448.aspx

Processors

Processors forum

CMEM Fail!!