[AM37x]L2 cache off

Sung-IL

Dear Champs,

Could you please guide how L2 cache can be 'off' after boot?

My customer want to evaluate their system performance with/without L2 Cache, but could not disable L2 cache at running time.

Could you please let me know where is a guide or provide a guide how L2 cache can be off after boot?

Their target OS is Linux and Android.

Thanks and Best Regards,

SI.

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi SI,

I have asked our software team and they gave me a list with these patches:

u-boot 2010.06 
device AM387x 

cache enable patches: 

AM/DM37x: Enabled L2 cache which was not getting enabled before 
http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=commit;h=7aff7ce7d1da4784091d61254fe7e3097a5a10f3 

TI8148 : Enable I-cache/D-cache for faster bootup 
http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=commit;h=505f6cd0e573d9bbe6b65d1297de8b5dbb1c0c13 

ti814x: Diable cache for now 
http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=commit;h=cd4e84fe32ad6d555c5fa297b6e74e4e3e8d3cbf 

TI81XX: Enable support for D-cache and MMU for TI81XX 
http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=commit;h=7d9cb5380cbe706052c91b35b6cee92b00e8d4eb 

TI81XX: cpsw: enable d-cache support for cpsw driver: 
http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=commit;h=3d69208be20cb5d19a94396ae25e0c05b97d37c5  

ARM: do not force d-cache enable on all boards 
http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=commit;h=a6552d4cde77b2b7c9d1d18e0799f7ce5e4c4f29 

TI8148: Enable d-cache at system startup 
http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=commit;h=670430ea63f2033673bfd1e09d38300099b545bc 

The whole u-boot 2010.06 code can be get from: 
http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=shortlog;h=refs/heads/ti81xx-master  


Note that these are for AM387X, but it has the same Cortex-A8 MPU as AM37X. Anyway these should give you directions what needs to be changed. 

About Android, please note that Android support from TI has been discontinued. See these posts:

https://e2e.ti.com/support/embedded/android/f/509/t/445615 
https://e2e.ti.com/support/embedded/android/f/509/t/416158 


Note that now support is available from the 3P Adeneo Embedded.

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[AM37x]L2 cache off