Re: [9fans] 2 bitsy questions

Re: [9fans] 2 bitsy questions

[F.J.Ballesteros]

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So, you mean that just repeating 
	setr13(PsrMfiq, m->sfiq);
	setr13(PsrMirq, m->sirq);
	setr13(PsrMabt, m->sabt);
	setr13(PsrMund, m->sund);
could do the job, since they always point to the same place.

I'll try that.
thanks a lot.


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From: presotto@plan9.bell-labs.com
To: nemo@gsyc.escet.urjc.es, 9fans@cse.psu.edu
Subject: Re: [9fans] 2 bitsy questions
Date: Thu, 7 Jun 2001 17:14:25 -0400
Message-ID: <20010607211434.27241199F1@mail.cse.psu.edu>

There is an r13 for each mode.  On traps, we always trampoline to svc
mode so that the r13 registers are always pointing to the same place
when we are interruptible.  You will definitely lose this state in
idle/sleep mode. I'll look at it a little more closely tonight.

Re: [9fans] 2 bitsy questions

[presotto]

There is an r13 for each mode.  On traps, we always trampoline to svc
mode so that the r13 registers are always pointing to the same place
when we are interruptible.  You will definitely lose this state in
idle/sleep mode. I'll look at it a little more closely tonight.

[9fans] 2 bitsy questions

[F.J.Ballesteros]

1) I think that the kernel saves all the processor register set during
its way down to the on/off interrupt handler, that's despite the banked
registers for the different processor modes. Is that true? Or should I
also save/recover registers for other modes (irq, und, ...)?  In
particular I suspect of r13 for the different modes.

Although the kernel seems to come back fine after a suspend, if I
let the system run it panics in syscall or gets frozen.

2) When I reactivate the power of the lcd, the screen seems to get back
but the colors are kind of `degraded' after a suspend in `text mode'.
If I suspend once the system creates a window, the screen background
comes back, but the text is  gone.  Do any of you know of a fine way to
get the display back?


I'll reread the code to see if I can find out the answers, so don't
hesitate to answer if you don't have the time.

thanks anyway