HLT idleing

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narada

Joined: 15 Feb 2008
Posts: 77
Location: Ukraine, Dnepropetrovsk

narada 22 Feb 2009, 10:05

I cant understood... where can I place HLT instruction? In my code only Scheduler is in CPL0... so hlt can be only in Scheduler... BUT if I will place HLT in Sched - my multitasking will be crashed...

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22 Feb 2009, 10:05

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19102
Location: In your JS exploiting you and your system

revolution 22 Feb 2009, 10:08

HLT is usually in the idle task. When there is nothing else to schedule the idle task runs.

BTW: HLT is a privileged instruction so it also needs to be executed at CPL0.

22 Feb 2009, 10:08

narada

Joined: 15 Feb 2008
Posts: 77
Location: Ukraine, Dnepropetrovsk

narada 22 Feb 2009, 17:30

but my IDLE task is CPL3...

22 Feb 2009, 17:30

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19102
Location: In your JS exploiting you and your system

revolution 22 Feb 2009, 17:38

But idle tasks normally have a lot of system management things to do, it is normal for it for be a privileged task.

22 Feb 2009, 17:38

asmcoder

Joined: 02 Jun 2008
Posts: 784

asmcoder 22 Feb 2009, 20:46

[content deleted]

22 Feb 2009, 20:46

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