This commit was generated by cvs2svn to compensate for changes in r52,
[reactos.git] / reactos / doc / irql.txt
1 This document describes the state of a uniprocessor PC at each of the IRQ
2 levels supported by the ReactOS kernel
3
4 PASSIVE_LEVEL: IF bit clear in the processor flags
5 All irqs umasked at the PIC
6
7 APC_LEVEL: Unknown
8 WAKE_LEVEL: Unknown
9
10 DISPATCH_LEVEL: IF bit clear in the processor flags
11 All irqs umasked at the PIC
12 Thread dispatching disabled
13
14 DIRQL (Device specific IRQ level):
15 IF bit clear in the processor flags
16 Device's irq and all lower priority irqs masked at the PIC
17 Thread dispatching disabled
18
19 HIGH_LEVEL: IF bit set in the processor flags
20 All irqs masked at the PIC
21 Thread dispatching disabled