Changeset 7bcfbbc in mainline for kernel/generic

Timestamp:

2007-04-07T23:30:59Z (18 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ac88c93

Parents:

7e58979

Message:

support the possibility to send EOI or Interrupt Acknowledgement
prior to processing the interrupt
(this is essential on some architectures to prevent preemption deadlock)

Location:

kernel/generic

Files:

• include/ddi/irq.h (modified) (2 diffs)
• src/ddi/irq.c (modified) (1 diff)

kernel/generic/include/ddi/irq.h

@@ -122 +122 @@
          */
         SPINLOCK_DECLARE(lock);
+        
+        /** Send EOI before processing the interrupt.
+         *  This is essential for timer interrupt which
+         *  has to be acknowledged before doing preemption
+         *  to make sure another timer interrupt will
+         *  be eventually generated.
+         */
+        bool preack;
 
         /** Unique device number. -1 if not yet assigned. */
@@ -128 +136 @@
         /** Actual IRQ number. -1 if not yet assigned. */
         inr_t inr;
-        /** Trigger level of the IRQ.*/
+        /** Trigger level of the IRQ. */
         irq_trigger_t trigger;
         /** Claim ownership of the IRQ. */

kernel/generic/src/ddi/irq.c

@@ -139 +139 @@
         link_initialize(&irq->link);
         spinlock_initialize(&irq->lock, "irq.lock");
+        irq->preack = false;
         irq->inr = -1;
         irq->devno = -1;