diff mbox

[doc,committed] document MicroBlaze interrupt_handler and fast_interrupt attributes

Message ID 568C068E.1050602@codesourcery.com
State New
Headers show

Commit Message

Sandra Loosemore Jan. 5, 2016, 6:08 p.m. UTC 
I've checked in this patch to add some minimal documentation for the 
MicroBlaze interrupt handler attributes.  I was able to figure this out 
by inspection of the code and reading the processor documentation, which 
has a more extensive discussion of how to use these features.

-Sandra

Comments

Michael Eager Jan. 5, 2016, 8:19 p.m. UTC | #1 
On 01/05/2016 10:08 AM, Sandra Loosemore wrote:
> I've checked in this patch to add some minimal documentation for the MicroBlaze interrupt handler
> attributes.  I was able to figure this out by inspection of the code and reading the processor
> documentation, which has a more extensive discussion of how to use these features.
>
> -Sandra

OK.
diff mbox

Patch

Index: gcc/doc/extend.texi
===================================================================
--- gcc/doc/extend.texi	(revision 232077)
+++ gcc/doc/extend.texi	(working copy)
@@ -4205,6 +4205,17 @@  the @code{rtbd} instead of @code{rtsd}.
 @smallexample
 void f () __attribute__ ((break_handler));
 @end smallexample
+
+@item interrupt_handler
+@itemx fast_interrupt 
+@cindex @code{interrupt_handler} function attribute, MicroBlaze
+@cindex @code{fast_interrupt} function attribute, MicroBlaze
+These attributes indicate that the specified function is an interrupt
+handler.  Use the @code{fast_interrupt} attribute to indicate handlers
+used in low-latency interrupt mode, and @code{interrupt_handler} for
+interrupts that do not use low-latency handlers.  In both cases, GCC
+emits appropriate prologue code and generates a return from the handler
+using @code{rtid} instead of @code{rtsd}.
 @end table
 
 @node Microsoft Windows Function Attributes