The previous implementation set the "aspeed_intc_ops" struct, containing read
and write callbacks, to be used when I/O is performed on the INTC region.
Both "aspeed_intc_read" and "aspeed_intc_write" callback functions were used
for INTC (CPU Die).

To support the INTCIO (IO Die) model, introduces a new "reg_ops" class
attribute. This allows setting different memory region operations to support
different INTC models.

Will introduce "aspeed_intcio_read" and "aspeed_intcio_write" callback
functions are used for INTCIO.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
---
 include/hw/intc/aspeed_intc.h | 1 +
 hw/intc/aspeed_intc.c         | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/hw/intc/aspeed_intc.h b/include/hw/intc/aspeed_intc.h
index 208e764c4a..3433277d87 100644
--- a/include/hw/intc/aspeed_intc.h
+++ b/include/hw/intc/aspeed_intc.h
@@ -43,6 +43,7 @@ struct AspeedINTCClass {
     uint64_t mem_size;
     uint64_t nr_regs;
     uint64_t reg_offset;
+    const MemoryRegionOps *reg_ops;
 };
 
 #endif /* ASPEED_INTC_H */
diff --git a/hw/intc/aspeed_intc.c b/hw/intc/aspeed_intc.c
index d06e697ecc..d8ee6e1c04 100644
--- a/hw/intc/aspeed_intc.c
+++ b/hw/intc/aspeed_intc.c
@@ -332,7 +332,7 @@ static void aspeed_intc_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &s->iomem_container);
 
     s->regs = g_new(uint32_t, aic->nr_regs);
-    memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_intc_ops, s,
+    memory_region_init_io(&s->iomem, OBJECT(s), aic->reg_ops, s,
                           TYPE_ASPEED_INTC ".regs", aic->nr_regs << 2);
 
     memory_region_add_subregion(&s->iomem_container, aic->reg_offset,
@@ -359,12 +359,15 @@ static void aspeed_intc_unrealize(DeviceState *dev)
 static void aspeed_intc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    AspeedINTCClass *aic = ASPEED_INTC_CLASS(klass);
 
     dc->desc = "ASPEED INTC Controller";
     dc->realize = aspeed_intc_realize;
     dc->unrealize = aspeed_intc_unrealize;
     device_class_set_legacy_reset(dc, aspeed_intc_reset);
     dc->vmsd = NULL;
+
+    aic->reg_ops = &aspeed_intc_ops;
 }
 
 static const TypeInfo aspeed_intc_info = {
-- 
2.43.0