hw/intc/loongarch_pch: Merge three memory region into one

Since memory region iomem supports memory access size with 1/2/4/8,
it can be used for memory region iomem8 and iomem32_high. Now remove
memory region iomem8 and iomem32_high, merge them into iomem together.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20250507023754.1877445-5-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>

hw/intc/loongarch_pch_pic.c

@@ -230,34 +230,6 @@ static void loongarch_pch_pic_write(void *opaque, hwaddr addr,
     }
 }
 
-static uint64_t loongarch_pch_pic_high_readw(void *opaque, hwaddr addr,
-                                        unsigned size)
-{
-    addr += PCH_PIC_INT_STATUS;
-    return loongarch_pch_pic_read(opaque, addr, size);
-}
-
-static void loongarch_pch_pic_high_writew(void *opaque, hwaddr addr,
-                                     uint64_t value, unsigned size)
-{
-    addr += PCH_PIC_INT_STATUS;
-    loongarch_pch_pic_write(opaque, addr, value, size);
-}
-
-static uint64_t loongarch_pch_pic_readb(void *opaque, hwaddr addr,
-                                        unsigned size)
-{
-    addr += PCH_PIC_ROUTE_ENTRY;
-    return loongarch_pch_pic_read(opaque, addr, size);
-}
-
-static void loongarch_pch_pic_writeb(void *opaque, hwaddr addr,
-                                     uint64_t data, unsigned size)
-{
-    addr += PCH_PIC_ROUTE_ENTRY;
-    loongarch_pch_pic_write(opaque, addr, data, size);
-}
-
 static const MemoryRegionOps loongarch_pch_pic_ops = {
     .read = loongarch_pch_pic_read,
     .write = loongarch_pch_pic_write,
@@ -279,34 +251,6 @@ static const MemoryRegionOps loongarch_pch_pic_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
-static const MemoryRegionOps loongarch_pch_pic_reg32_high_ops = {
-    .read = loongarch_pch_pic_high_readw,
-    .write = loongarch_pch_pic_high_writew,
-    .valid = {
-        .min_access_size = 4,
-        .max_access_size = 8,
-    },
-    .impl = {
-        .min_access_size = 4,
-        .max_access_size = 4,
-    },
-    .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static const MemoryRegionOps loongarch_pch_pic_reg8_ops = {
-    .read = loongarch_pch_pic_readb,
-    .write = loongarch_pch_pic_writeb,
-    .valid = {
-        .min_access_size = 1,
-        .max_access_size = 1,
-    },
-    .impl = {
-        .min_access_size = 1,
-        .max_access_size = 1,
-    },
-    .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
 static void loongarch_pic_reset_hold(Object *obj, ResetType type)
 {
     LoongarchPICClass *lpc = LOONGARCH_PIC_GET_CLASS(obj);
@@ -333,16 +277,8 @@ static void loongarch_pic_realize(DeviceState *dev, Error **errp)
     qdev_init_gpio_in(dev, pch_pic_irq_handler, s->irq_num);
     memory_region_init_io(&s->iomem, OBJECT(dev),
                           &loongarch_pch_pic_ops,
-                          s, TYPE_LOONGARCH_PIC, 0x100);
-    memory_region_init_io(&s->iomem8, OBJECT(dev), &loongarch_pch_pic_reg8_ops,
-                          s, PCH_PIC_NAME(.reg8), 0x2a0);
-    memory_region_init_io(&s->iomem32_high, OBJECT(dev),
-                          &loongarch_pch_pic_reg32_high_ops,
-                          s, PCH_PIC_NAME(.reg32_part2), 0xc60);
+                          s, TYPE_LOONGARCH_PIC, VIRT_PCH_REG_SIZE);
     sysbus_init_mmio(sbd, &s->iomem);
-    sysbus_init_mmio(sbd, &s->iomem8);
-    sysbus_init_mmio(sbd, &s->iomem32_high);
-
 }
 
 static void loongarch_pic_class_init(ObjectClass *klass, const void *data)

hw/loongarch/virt.c

@@ -429,12 +429,6 @@ static void virt_irq_init(LoongArchVirtMachineState *lvms)
     sysbus_realize_and_unref(d, &error_fatal);
     memory_region_add_subregion(get_system_memory(), VIRT_IOAPIC_REG_BASE,
                             sysbus_mmio_get_region(d, 0));
-    memory_region_add_subregion(get_system_memory(),
-                            VIRT_IOAPIC_REG_BASE + PCH_PIC_ROUTE_ENTRY,
-                            sysbus_mmio_get_region(d, 1));
-    memory_region_add_subregion(get_system_memory(),
-                            VIRT_IOAPIC_REG_BASE + PCH_PIC_INT_STATUS,
-                            sysbus_mmio_get_region(d, 2));
 
     /* Connect pch_pic irqs to extioi */
     for (i = 0; i < num; i++) {

include/hw/intc/loongarch_pic_common.h

@@ -66,8 +66,6 @@ struct LoongArchPICCommonState {
     uint8_t htmsi_vector[64]; /* 0x200 - 0x238 */
 
     MemoryRegion iomem;
-    MemoryRegion iomem32_high;
-    MemoryRegion iomem8;
     unsigned int irq_num;
 };