INIT switch handler
The init handler in arch/ia64/kernel/mca.c doesn't do anything yet. Does anyone have plans for what such a handler should or will do on Linux?
When the init switch is pressed, it causes a reset of the processor(s). The purpose of the init
switch on Lion is the same as the NMI switch on the IA-32 platforms. The OS will have to write a handler that will check and see that the init switch has been pressed and dump the state of the processor and the state of the system.
Thanks,
Matt Domsch
IA-64 Linux Lead Engineer
Dell Computer Corporation
Quoted 10 lines
The init handler in
arch/ia64/kernel/mca.cdoesn't do anything yet. Does anyone have plans for what such a handler should or will do on Linux?When the init switch is pressed, it causes a reset of the processor(s). The purpose of the init
switch on Lion is the same as the NMI switch on the IA-32 platforms. The OS will have to write a handler that will check and see that the init switch has been pressed and dump the state of the processor and the state of the system.
funny you should mention that. I hacked on this
code yesterday and it is building now in my local sandbox and have it at least making the appropriate SAL calls to register the handlers without dying during boot. My first plan of attack once I get init handler called is to have it dump the state info and call the debugger.
I've also been talking to the internal hardware dudes about INIT and the NMI paths.
I'll submit a patch to David for the build/cleanup portion of this and will continue to debug the handler path.
Other ideas on this subject ?
Chuck
Chuck Fleckenstein
Intel IPD
[email protected]