How to reset other core of ARM Cortex A9?

Question

I want to reset the other cores of a Cortex A9 CPU in the primary CPU, but I can't find the instructions of how to reset it.

I am using Xilinx Device Zynq, the board is ZedBoard.
I want to run a muti-core realtime OS on it, but I can't do a software reset on it.

score 0 · Answer 1 · answered Nov 11 '12 at 18:00

0

I dont know about all arm cores but I think the resets are around the edge of the core so you would need to ask your fpga designer or xilinx, etc. it may or may not be a register depending on implementation.

answered Nov 11 '12 at 18:00

old_timer

69,149
8
89
168

score 0 · Answer 2 · answered Nov 13 '12 at 20:37

0

Zynq Datasheet says it has Cortex-A9 MPCore. MPCore TRM has some sections e.g. 5.2.4. Individual processor software reset, but the text just gives HW reset sequence.

It would seem that ARM discourages the software reset that you are asking for. But you could also check Cortex-A9 TRM.

answered Nov 13 '12 at 20:37

Joe Kul

2,454
16
16

yeah, I got it ,thanks a lot, I have refer to this reference and I have find a method when reading xilinx zynq fsbl source code – hqfang Nov 23 '12 at 07:07

How to reset other core of ARM Cortex A9?

2 Answers2