IRQ masking register modification

kazumasasaki — Mon, 13 Mar 2017 07:36:02 GMT

Hi, I would like to change all IRQ masking register (GPC_IMR) via MEMTOOL to investigate interrupt behavior.

However, I could not change these register value.

here is my test logs from my console.

=== TEST LOG ===

root@imx6dlsabreauto:# /unit_tests/memtool -32 20dc008=ffffffff
Writing 32-bit value 0xFFFFFFFF to address 0x020DC008

root@imx6dlsabreauto:# /unit_tests/memtool -32 20dc008 1
Reading 0x1 count starting at address 0x020DC008

0x020DC008: CEA3EF93

================

If I tried GPC_CNTR modification via MEMTOOL same as above procedure,

I can change register's value successfully.

also, I have successfully modified registers value of GPC_IMR via "mw" command from U-BOOT prompt.

How do I change registers value of GPC_IMR via MEMTOOL from Linux BSP?

Board : SABRE Auto

CPU : i.MX6DL

OS : Linux version 4.1.15-2.0.1

Best Regards,

Kazuma Sasaki.

Re: IRQ masking register modification

Yuri — Wed, 15 Mar 2017 07:10:08 GMT

Hello,

basically interrupts are controlled by the kernel; please look at section 3.2 [Interrupts (Operation)]

of "i.MX_Linux_Reference_Manual.pdf" in linux docs.

Regards,

Yuri.