On Mon, 3 Dec 2018 at 17:22, Dave Emett david.emett@broadcom.com wrote:
- The caches (L1T, slice, and L2T) will be flushed before the job
- executes. The TLB writes are guaranteed to have been flushed by
I would say before *each* job executes, as the caches are flushed before both bin and render. I wouldn't say "the caches" as not all of the V3D caches are flushed before executing a control list. In particular, the VCD cache is not cleared by the kernel driver (not even sure if there is a register interface to do this); it is expected that the control list will do this itself (using the CLEAR_VCD_CACHE instruction). On 3.3 and earlier there is a separate L2C for instructions/uniforms and a GCA. These do need to be flushed, and it looks like they are, so they should be mentioned here.
Correction: on *3.2* and earlier there is a separate L2C for instructions/uniforms. On 3.3 and earlier there is a GCA.
It looks like we're currently unconditionally writing the L2C clear registers. We should really only be doing this on 3.2 and earlier.