I am writing a WAN driver using the...
Articles and Tips: qna
01 Jul 2002
Q.
I am writing a WAN driver using the WAN driver NDK. How do I declare the SHARE-aware interrupt and SMP-aware interrupt before the BusInterrup- tSetup() function call within NetWare 5.x WAN (or LAN) driver? Unfortunately, the "flags" parameter is undocumented. I think there are two bits that make up this parameter.
A.
The flags are as follows:
|
Bit Set
|
Flags
|
|
Bit 0 |
0=Do not share 1= This interrupt may be shared |
|
Bit 1-28 |
reserved, set to zero |
|
Bit 29 |
0=The ISR is not MP aware 1=The ISR is MP aware |
|
Bit 30 |
0=Do not save the floating point state before servicing this interrupt 1= Do save (implies ISR may change floating point state) |
|
Bit 31 |
reserved, set to zero |
Bear in mind that there are other requirements, like interrupt sharing (sharing flag in IOConfigStruc) and MP awareness (build process). By the way, WAN drivers are not Multi-Processor aware.
* Originally published in Novell AppNotes
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