1 files changed, 19 insertions, 4 deletions

diff --git a/hw/iommu.c b/hw/iommu.c
index 271c4d473d..d3a50fc7aa 100644
--- a/hw/iommu.c
+++ b/hw/iommu.c
@@ -112,21 +112,28 @@ typedef struct IOMMUState {
     uint32_t regs[IOMMU_NREGS];
     target_phys_addr_t iostart;
     uint32_t version;
+    qemu_irq irq;
 } IOMMUState;
 
 static uint32_t iommu_mem_readw(void *opaque, target_phys_addr_t addr)
 {
     IOMMUState *s = opaque;
     target_phys_addr_t saddr;
+    uint32_t ret;
 
     saddr = (addr - s->addr) >> 2;
     switch (saddr) {
     default:
-        DPRINTF("read reg[%d] = %x\n", (int)saddr, s->regs[saddr]);
-        return s->regs[saddr];
+        ret = s->regs[saddr];
+        break;
+    case IOMMU_AFAR:
+    case IOMMU_AFSR:
+        ret = s->regs[saddr];
+        qemu_irq_lower(s->irq);
         break;
     }
-    return 0;
+    DPRINTF("read reg[%d] = %x\n", (int)saddr, ret);
+    return ret;
 }
 
 static void iommu_mem_writew(void *opaque, target_phys_addr_t addr,
@@ -180,8 +187,13 @@ static void iommu_mem_writew(void *opaque, target_phys_addr_t addr,
         DPRINTF("page flush %x\n", val);
         s->regs[saddr] = val & IOMMU_PGFLUSH_MASK;
         break;
+    case IOMMU_AFAR:
+        s->regs[saddr] = val;
+        qemu_irq_lower(s->irq);
+        break;
     case IOMMU_AFSR:
         s->regs[saddr] = (val & IOMMU_AFSR_MASK) | IOMMU_AFSR_RESV;
+        qemu_irq_lower(s->irq);
         break;
     case IOMMU_SBCFG0:
     case IOMMU_SBCFG1:
@@ -255,6 +267,7 @@ static void iommu_bad_addr(IOMMUState *s, target_phys_addr_t addr,
     if (!is_write)
         s->regs[IOMMU_AFSR] |= IOMMU_AFSR_RD;
     s->regs[IOMMU_AFAR] = addr;
+    qemu_irq_raise(s->irq);
 }
 
 void sparc_iommu_memory_rw(void *opaque, target_phys_addr_t addr,
@@ -324,9 +337,10 @@ static void iommu_reset(void *opaque)
     s->regs[IOMMU_CTRL] = s->version;
     s->regs[IOMMU_ARBEN] = IOMMU_MID;
     s->regs[IOMMU_AFSR] = IOMMU_AFSR_RESV;
+    qemu_irq_lower(s->irq);
 }
 
-void *iommu_init(target_phys_addr_t addr, uint32_t version)
+void *iommu_init(target_phys_addr_t addr, uint32_t version, qemu_irq irq)
 {
     IOMMUState *s;
     int iommu_io_memory;
@@ -337,6 +351,7 @@ void *iommu_init(target_phys_addr_t addr, uint32_t version)
 
     s->addr = addr;
     s->version = version;
+    s->irq = irq;
 
     iommu_io_memory = cpu_register_io_memory(0, iommu_mem_read,
                                              iommu_mem_write, s);