Changeset 375

Timestamp:

Sep 26, 2008, 9:16:38 PM (17 years ago)

Author:

rjerant

Message:

Change interrupt handler to run with interrupts enabled

Location:

GPL/branches/uniaud32-2.0/drv32

Files:

• irq.cpp (modified) (1 diff)
• startup.asm (modified) (1 diff)

GPL/branches/uniaud32-2.0/drv32/irq.cpp

@@ -93 +93 @@
     ULONG       ulIrqNo;
 
-    if( process_interrupt(ulSlotNo, &ulIrqNo) ) {
-        cli();
-        // We've cleared all service requests.  Send EOI and clear
-        // the carry flag (tells OS/2 kernel that Int was handled).
-        DevEOI( (WORD16)ulIrqNo );
-        return TRUE;
+   // enable interrupts that have higher priority we should 
+   // allow higher priority interrupts
+   sti(); 
+   if( process_interrupt(ulSlotNo, &ulIrqNo) ) {
+       // We've cleared all service requests.  
+       // Clear (disable) Interrupts, Send EOI 
+       // and clear the carry flag (tells OS/2 kernel that Int was handled).
+       // Note carry flag is handled in setup.asm 
+       cli();
+       DevEOI( (WORD16)ulIrqNo );
+       return TRUE;
    }
    // Indicate Interrupt not serviced by setting carry flag before

GPL/branches/uniaud32-2.0/drv32/startup.asm

@@ -1316 +1316 @@
 
         pushfd
-        cli
+        ; At this point a cli is redundant
+        ; we enter the interrupt handler with interrupts disabled.
+        ;cli
 
 IFDEF FLATSTACK