AM6442: AM6442

Hi Jinmin,
You had few e2e posts inquiring R5SS on AM64x.
Will you elaborate your user case in more details?
What OS are you considering in your design?

You may also refer to <5.2.2.2 Power Control Modules in the TRM> on PSC, for example, Table 5-1197. MAIN PSC Information

A simplified typical boot sequence in Linux SDK:
- R5 SPL loaded by rom and runs on R5_0
- SYSFW loaded by rom and runs on DMSC
- R5 SPL loads ATF, OPTEE, A53 SPL, and ATF, OPTEE, A53 SPL runs on A53_0
  @this time, DMSC/A53_0/R5_0 are “ON”, and rest of cores are “OFF”
- R5 SPL tear-down R5_0…
  @this time, DMSC/A53_0 are “ON”, rest of cores are “OFF”
- Linux kernel boots up, rest of cores may be optionally loaded and launched depending on Linux system configurations.

Best,
-Hong

Dear Hong Guan64,

  thanks for your replay.

  My customers develop only app layer with elf excutable os at Am64x.
  I am desginated to development boot phase at AM64x.Refer to below cores in boot phase:
  one A53 core
  one R5FSS0 core
  one R5FSS1 core.

  AM64x-evm-gp SDK boot phase demostration in linux environment is as the below first table:

  there is a boot phase as below in my mind,can be realised right?

cause there are few changes between the first table and second table:
1.remove phase 3 from boot phase in the first table.
   It's feasibility which has be verified ok.
2.cut R5FSS0 run flow from wfe mode to entering r5fss0-0 elf excutable kernel(for example RTOS/NORTOS).
   It's failed to use funtion do_bootelf_exec() .Phenomenon as this link description e2e.ti.com/.../am6442-am6442
   I will try to use r5f rproc driver to load and start r5f rproc.
3.add one step to load R5FSS1 SPL(boot) image in R5FSS0 SPL,then R5FSS1 boot 
  is this feasibility right?

Thanks for any advice for me.

BG,

jimin.li

Dear Hong Guan64,

latest update for verify 2.cut R5FSS0 run flow from wfe mode to entering r5fss0-0 elf excutable kernel(for example RTOS/NORTOS). is OK.

Next step we need bring R5FSS1 up.