hw/intc/aspeed: Introduce IRQ handler function to reduce code duplication

The behavior of the INTC set IRQ is almost identical between INTC and INTCIO.
To reduce duplicated code, introduce the "aspeed_intc_set_irq_handler" function
to handle both INTC and INTCIO IRQ behavior. No functional change.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250307035945.3698802-16-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

1 files changed, 39 insertions, 31 deletions

diff --git a/hw/intc/aspeed_intc.c b/hw/intc/aspeed_intc.c
index be24516..3aa97ad 100644
--- a/hw/intc/aspeed_intc.c
+++ b/hw/intc/aspeed_intc.c
@@ -76,11 +76,45 @@ static void aspeed_intc_update(AspeedINTCState *s, int inpin_idx,
     qemu_set_irq(s->output_pins[outpin_idx], level);
 }
 
+static void aspeed_intc_set_irq_handler(AspeedINTCState *s,
+                                        const AspeedINTCIRQ *intc_irq,
+                                        uint32_t select)
+{
+    const char *name = object_get_typename(OBJECT(s));
+    uint32_t status_reg;
+    int outpin_idx;
+    int inpin_idx;
+
+    status_reg = intc_irq->status_reg;
+    outpin_idx = intc_irq->outpin_idx;
+    inpin_idx = intc_irq->inpin_idx;
+
+    if (s->mask[inpin_idx] || s->regs[status_reg]) {
+        /*
+         * a. mask is not 0 means in ISR mode
+         * sources interrupt routine are executing.
+         * b. status register value is not 0 means previous
+         * source interrupt does not be executed, yet.
+         *
+         * save source interrupt to pending variable.
+         */
+        s->pending[inpin_idx] |= select;
+        trace_aspeed_intc_pending_irq(name, inpin_idx, s->pending[inpin_idx]);
+    } else {
+        /*
+         * notify firmware which source interrupt are coming
+         * by setting status register
+         */
+        s->regs[status_reg] = select;
+        trace_aspeed_intc_trigger_irq(name, inpin_idx, outpin_idx,
+                                      s->regs[status_reg]);
+        aspeed_intc_update(s, inpin_idx, outpin_idx, 1);
+    }
+}
+
 /*
- * The address of GICINT128 to GICINT136 are from 0x1000 to 0x1804.
- * Utilize "address & 0x0f00" to get the irq and irq output pin index
- * The value of irq should be 0 to num_inpins.
- * The irq 0 indicates GICINT128, irq 1 indicates GICINT129 and so on.
+ * GICINT128 to GICINT136 map 1:1 to input and output IRQs 0 to 8.
+ * The value of input IRQ should be between 0 and the number of inputs.
  */
 static void aspeed_intc_set_irq(void *opaque, int irq, int level)
 {
@@ -88,20 +122,15 @@ static void aspeed_intc_set_irq(void *opaque, int irq, int level)
     AspeedINTCClass *aic = ASPEED_INTC_GET_CLASS(s);
     const char *name = object_get_typename(OBJECT(s));
     const AspeedINTCIRQ *intc_irq;
-    uint32_t status_reg;
     uint32_t select = 0;
     uint32_t enable;
-    int outpin_idx;
     int inpin_idx;
     int i;
 
     assert(irq < aic->num_inpins);
 
     intc_irq = &aic->irq_table[irq];
-    status_reg = intc_irq->status_reg;
-    outpin_idx = intc_irq->outpin_idx;
     inpin_idx = intc_irq->inpin_idx;
-
     trace_aspeed_intc_set_irq(name, inpin_idx, level);
     enable = s->enable[inpin_idx];
 
@@ -122,28 +151,7 @@ static void aspeed_intc_set_irq(void *opaque, int irq, int level)
     }
 
     trace_aspeed_intc_select(name, select);
-
-    if (s->mask[inpin_idx] || s->regs[status_reg]) {
-        /*
-         * a. mask is not 0 means in ISR mode
-         * sources interrupt routine are executing.
-         * b. status register value is not 0 means previous
-         * source interrupt does not be executed, yet.
-         *
-         * save source interrupt to pending variable.
-         */
-        s->pending[inpin_idx] |= select;
-        trace_aspeed_intc_pending_irq(name, inpin_idx, s->pending[inpin_idx]);
-    } else {
-        /*
-         * notify firmware which source interrupt are coming
-         * by setting status register
-         */
-        s->regs[status_reg] = select;
-        trace_aspeed_intc_trigger_irq(name, inpin_idx, outpin_idx,
-                                      s->regs[status_reg]);
-        aspeed_intc_update(s, inpin_idx, outpin_idx, 1);
-    }
+    aspeed_intc_set_irq_handler(s, intc_irq, select);
 }
 
 static void aspeed_intc_enable_handler(AspeedINTCState *s, hwaddr offset,