hw/intc/loongson_ipi: Add LoongsonIPICommonClass::get_iocsr_as handler

Allow Loongson IPI implementations to have their own get_iocsr_as()
handler.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
[PMD: Extracted from bigger commit, added commit description]
Co-Developed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Tested-by: Bibo Mao <maobibo@loongson.cn>
Acked-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-Id: <20240805180622.21001-9-philmd@linaro.org>

hw/intc/loongson_ipi.c

@@ -75,24 +75,30 @@ static MemTxResult loongson_ipi_iocsr_readl(void *opaque, hwaddr addr,
     return loongson_ipi_core_readl(s, addr, data, size, attrs);
 }
 
-static AddressSpace *get_cpu_iocsr_as(CPUState *cpu)
-{
 #ifdef TARGET_LOONGARCH64
+static AddressSpace *get_iocsr_as(CPUState *cpu)
+{
     return LOONGARCH_CPU(cpu)->env.address_space_iocsr;
+}
 #endif
+
 #ifdef TARGET_MIPS
+static AddressSpace *get_iocsr_as(CPUState *cpu)
+{
     if (ase_lcsr_available(&MIPS_CPU(cpu)->env)) {
         return &MIPS_CPU(cpu)->env.iocsr.as;
     }
-#endif
+
     return NULL;
 }
+#endif
 
 static MemTxResult send_ipi_data(LoongsonIPICommonState *ipi, CPUState *cpu,
                                  uint64_t val, hwaddr addr, MemTxAttrs attrs)
 {
+    LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_GET_CLASS(ipi);
     int i, mask = 0, data = 0;
-    AddressSpace *iocsr_as = get_cpu_iocsr_as(cpu);
+    AddressSpace *iocsr_as = licc->get_iocsr_as(cpu);
 
     if (!iocsr_as) {
         return MEMTX_DECODE_ERROR;
@@ -354,11 +360,13 @@ static void loongson_ipi_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     LoongsonIPIClass *lic = LOONGSON_IPI_CLASS(klass);
+    LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass);
 
     device_class_set_parent_realize(dc, loongson_ipi_realize,
                                     &lic->parent_realize);
     device_class_set_parent_unrealize(dc, loongson_ipi_unrealize,
                                       &lic->parent_unrealize);
+    licc->get_iocsr_as = get_iocsr_as;
 }
 
 static const TypeInfo loongson_ipi_types[] = {

include/hw/intc/loongson_ipi_common.h

@@ -39,6 +39,8 @@ struct LoongsonIPICommonState {
 
 struct LoongsonIPICommonClass {
     SysBusDeviceClass parent_class;
+
+    AddressSpace *(*get_iocsr_as)(CPUState *cpu);
 };
 
 /* Mainy used by iocsr read and write */