Linked by Hadrien Grasland on Thu 19th May 2011 21:31 UTC
Hardware, Embedded Systems Having read the feedback resulting from my previous post on interrupts (itself resulting from an earlier OSnews Asks item on the subject), I've had a look at the way interrupts work on PowerPC v2.02, SPARC v9, Alpha and IA-64 (Itanium), and contribute this back to anyone who's interested (or willing to report any blatant flaw found in my posts). I've also tried to rework a bit my interrupt handling model to make it significantly clearer and have it look more like a design doc and less like a code draft.
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RE: PowerPC v2 ?
by Neolander on Fri 20th May 2011 11:43 UTC in reply to "PowerPC v2 ?"
Neolander
Member since:
2010-03-08

I'll check once I'm at home and have my stack of manuals at hand, but I think there was something like "PowerPC v2.1" written on the first page of the manual, so I assumed that this architecture had, like ARM, seen several revisions.

Edited 2011-05-20 11:47 UTC

Reply Parent Score: 1

RE[2]: PowerPC v2 ?
by DeepThought on Fri 20th May 2011 12:50 in reply to "RE: PowerPC v2 ?"
DeepThought Member since:
2010-07-17

Actually the last public Power (now w/o PC) ISA is 2.06.
But it does not describe interrupt handling.
Much of it depends on the implementation. Means IBM does it different from Freescale. And Freescale even has different interrupt handling depending on the core.

Reply Parent Score: 1

RE[3]: PowerPC v2 ?
by Neolander on Fri 20th May 2011 22:00 in reply to "RE[2]: PowerPC v2 ?"
Neolander Member since:
2010-03-08

On my first book, it's written "PowerPC User Instruction Set Architecture
Book I
Version 2.02", so I don't have the latest version. This may explain some things.

In the book 3, called "Operating environment architecture", there's a whole chapter (chapter 5) dedicated to interrupt and exception handling. It noticeably mentions an "external" interrupt, that seems to centralize all the external interrupts managed by implementation-specific hardware.

Edited 2011-05-20 22:02 UTC

Reply Parent Score: 1