/dev/mem with PA-RISC systems

[Johnson Punniyalingam]

But I’m getting confused because according to some info I get from hp docs, the /dev/mem should work with PA-RISC systems.
Can anyone help on my doubt if there is an exemption with model rp4440?

# echo phys_mem_pages/D | adb /stand/vmunix /dev/kmem
phys_mem_pages:
phys_mem_pages: 5242368

HPUX 11.11

[James R. Ferguson]

Hi:

This output looks correct. There should be nothing unique about your rp4440 in the context you ask.

Regards!

...JRF...

[Johnson Punniyalingam]

Hi JRF,

Bunch of thanks for your reply, my confusion in this (PA-RISC)Model(rp4440), i mean can't use /dev/mem i changed from /dev/kmem than i was able to get the expected output

Please see below output which i got from "/dev/mem"

# echo 'phys_mem_pages/D' | /usr/bin/adb /stand/vmunix /dev/mem
phys_mem_pages:
phys_mem_pages:
data address not found
#

Rgds,
Johnson

[Horia Chirculescu · Accepted solution]

Hello Johnson,

The same result here, on rp3440

echo 'phys_mem_pages/D' | /usr/bin/adb /stand/vmunix /dev/mem
phys_mem_pages:
phys_mem_pages:
data address not found

Horia.

[Dennis Handly]

When I use /dev/mem or -k with /dev/mem, adb gets into a 100% loop. Not sure what it's doing?

[Johnson Punniyalingam]

Please see below "Feeback" from Response Center


The /dev/mem and /dev/kmem character special files provide access to a pseudo device driver that allows read and write access to system memory and kernel virtual memory.
In 11.11 virtual and physical kernel addresses are typically the same (it's called equiv mapped), so we would suggest using /dev/kmem instead of /dev/mem in HPUX 11.11 systems.

[Johnson Punniyalingam]

Many Thanks, for all your contribution

Rgds,
Johnson