hw/intc/aspeed: Introduce AspeedINTCIRQ structure to save the irq index and register address

The INTC controller supports GICINT128 to GICINT136, mapping 1:1 to input and
output IRQs 0 to 8. Previously, the formula "address & 0x0f00" was used to
derive the IRQ index numbers.

However, the INTC controller also supports GICINT192_201, mapping 1 input IRQ
pin to 10 output IRQ pins. The pin numbers for input and output are different.
It is difficult to use a formula to determine the index number of INTC model
supported input and output IRQs.

To simplify and improve readability, introduces the AspeedINTCIRQ structure to
save the input/output IRQ index and its enable/status register address.

Introduce the "aspeed_2700_intc_irqs" table to store IRQ information for INTC.
Introduce the "aspeed_intc_get_irq" function to retrieve the input/output IRQ
pin index from the provided status/enable register address.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250307035945.3698802-15-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/hw/intc/aspeed_intc.h b/include/hw/intc/aspeed_intc.h
index 2a22e30846..e6c3a27264 100644
--- a/include/hw/intc/aspeed_intc.h
+++ b/include/hw/intc/aspeed_intc.h
@@ -19,6 +19,14 @@ OBJECT_DECLARE_TYPE(AspeedINTCState, AspeedINTCClass, ASPEED_INTC)
 #define ASPEED_INTC_MAX_INPINS 9
 #define ASPEED_INTC_MAX_OUTPINS 9
 
+typedef struct AspeedINTCIRQ {
+    int inpin_idx;
+    int outpin_idx;
+    int num_outpins;
+    uint32_t enable_reg;
+    uint32_t status_reg;
+} AspeedINTCIRQ;
+
 struct AspeedINTCState {
     /*< private >*/
     SysBusDevice parent_obj;
@@ -46,6 +54,8 @@ struct AspeedINTCClass {
     uint64_t nr_regs;
     uint64_t reg_offset;
     const MemoryRegionOps *reg_ops;
+    const AspeedINTCIRQ *irq_table;
+    int irq_table_count;
 };
 
 #endif /* ASPEED_INTC_H */