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Index > OS Construction > HLT idleing

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narada



Joined: 15 Feb 2008
Posts: 77
Location: Ukraine, Dnepropetrovsk
narada
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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Post 22 Feb 2009, 10:05
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17716
Location: In your JS exploiting you and your system
revolution
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.
Post 22 Feb 2009, 10:08
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narada



Joined: 15 Feb 2008
Posts: 77
Location: Ukraine, Dnepropetrovsk
narada
but my IDLE task is CPL3...
Post 22 Feb 2009, 17:30
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17716
Location: In your JS exploiting you and your system
revolution
But idle tasks normally have a lot of system management things to do, it is normal for it for be a privileged task.
Post 22 Feb 2009, 17:38
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asmcoder



Joined: 02 Jun 2008
Posts: 784
asmcoder
[content deleted]
Post 22 Feb 2009, 20:46
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