[Qemu-devel] [4330] Remember the state of level-triggered interrupts

[Aurelien Jarno]

Revision: 4330
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=4330
Author:   aurel32
Date:     2008-05-04 13:15:24 +0000 (Sun, 04 May 2008)

Log Message:
-----------
Remember the state of level-triggered interrupts

(Hollis Blanchard)

Modified Paths:
--------------
    trunk/hw/ppc4xx_devs.c

Modified: trunk/hw/ppc4xx_devs.c
===================================================================
--- trunk/hw/ppc4xx_devs.c      2008-05-04 13:15:15 UTC (rev 4329)
+++ trunk/hw/ppc4xx_devs.c      2008-05-04 13:15:24 UTC (rev 4330)
@@ -278,6 +278,7 @@
 struct ppcuic_t {
     uint32_t dcr_base;
     int use_vectors;
+    uint32_t level;  /* Remembers the state of level-triggered interrupts. */
     uint32_t uicsr;  /* Status register */
     uint32_t uicer;  /* Enable register */
     uint32_t uiccr;  /* Critical register */
@@ -385,10 +386,13 @@
             uic->uicsr |= mask;
     } else {
         /* Level sensitive interrupt */
-        if (level == 1)
+        if (level == 1) {
             uic->uicsr |= mask;
-        else
+            uic->level |= mask;
+        } else {
             uic->uicsr &= ~mask;
+            uic->level &= ~mask;
+        }
     }
 #ifdef DEBUG_UIC
     if (loglevel & CPU_LOG_INT) {
@@ -460,6 +464,7 @@
     switch (dcrn) {
     case DCR_UICSR:
         uic->uicsr &= ~val;
+        uic->uicsr |= uic->level;
         ppcuic_trigger_irq(uic);
         break;
     case DCR_UICSRS: