diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index 09b1e823ba..0af96afa16 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -342,7 +342,7 @@ static void connect_serial_hds_to_uarts(AspeedMachineState *bmc)
     int uart_chosen = bmc->uart_chosen ? bmc->uart_chosen : amc->uart_default;
 
     aspeed_soc_uart_set_chr(s, uart_chosen, serial_hd(0));
-    for (int i = 1, uart = ASPEED_DEV_UART1; i < sc->uarts_num; i++, uart++) {
+    for (int i = 1, uart = sc->uarts_base; i < sc->uarts_num; i++, uart++) {
         if (uart == uart_chosen) {
             continue;
         }
@@ -1094,7 +1094,7 @@ static char *aspeed_get_bmc_console(Object *obj, Error **errp)
     AspeedMachineClass *amc = ASPEED_MACHINE_GET_CLASS(bmc);
     int uart_chosen = bmc->uart_chosen ? bmc->uart_chosen : amc->uart_default;
 
-    return g_strdup_printf("uart%d", uart_chosen - ASPEED_DEV_UART1 + 1);
+    return g_strdup_printf("uart%d", aspeed_uart_index(uart_chosen));
 }
 
 static void aspeed_set_bmc_console(Object *obj, const char *value, Error **errp)
@@ -1103,6 +1103,8 @@ static void aspeed_set_bmc_console(Object *obj, const char *value, Error **errp)
     AspeedMachineClass *amc = ASPEED_MACHINE_GET_CLASS(bmc);
     AspeedSoCClass *sc = ASPEED_SOC_CLASS(object_class_by_name(amc->soc_name));
     int val;
+    int uart_first = aspeed_uart_first(sc);
+    int uart_last = aspeed_uart_last(sc);
 
     if (sscanf(value, "uart%u", &val) != 1) {
         error_setg(errp, "Bad value for \"uart\" property");
@@ -1110,11 +1112,12 @@ static void aspeed_set_bmc_console(Object *obj, const char *value, Error **errp)
     }
 
     /* The number of UART depends on the SoC */
-    if (val < 1 || val > sc->uarts_num) {
-        error_setg(errp, "\"uart\" should be in range [1 - %d]", sc->uarts_num);
+    if (val < uart_first || val > uart_last) {
+        error_setg(errp, "\"uart\" should be in range [%d - %d]",
+                   uart_first, uart_last);
         return;
     }
-    bmc->uart_chosen = ASPEED_DEV_UART1 + val - 1;
+    bmc->uart_chosen = val + ASPEED_DEV_UART0;
 }
 
 static void aspeed_machine_class_props_init(ObjectClass *oc)
diff --git a/hw/arm/aspeed_ast10x0.c b/hw/arm/aspeed_ast10x0.c
index c3b5116a6a..2634e0f654 100644
--- a/hw/arm/aspeed_ast10x0.c
+++ b/hw/arm/aspeed_ast10x0.c
@@ -436,6 +436,7 @@ static void aspeed_soc_ast1030_class_init(ObjectClass *klass, void *data)
     sc->wdts_num = 4;
     sc->macs_num = 1;
     sc->uarts_num = 13;
+    sc->uarts_base = ASPEED_DEV_UART1;
     sc->irqmap = aspeed_soc_ast1030_irqmap;
     sc->memmap = aspeed_soc_ast1030_memmap;
     sc->num_cpus = 1;
diff --git a/hw/arm/aspeed_ast2400.c b/hw/arm/aspeed_ast2400.c
index 8829561bb6..95da85fee0 100644
--- a/hw/arm/aspeed_ast2400.c
+++ b/hw/arm/aspeed_ast2400.c
@@ -523,6 +523,7 @@ static void aspeed_soc_ast2400_class_init(ObjectClass *oc, void *data)
     sc->wdts_num     = 2;
     sc->macs_num     = 2;
     sc->uarts_num    = 5;
+    sc->uarts_base   = ASPEED_DEV_UART1;
     sc->irqmap       = aspeed_soc_ast2400_irqmap;
     sc->memmap       = aspeed_soc_ast2400_memmap;
     sc->num_cpus     = 1;
@@ -551,6 +552,7 @@ static void aspeed_soc_ast2500_class_init(ObjectClass *oc, void *data)
     sc->wdts_num     = 3;
     sc->macs_num     = 2;
     sc->uarts_num    = 5;
+    sc->uarts_base   = ASPEED_DEV_UART1;
     sc->irqmap       = aspeed_soc_ast2500_irqmap;
     sc->memmap       = aspeed_soc_ast2500_memmap;
     sc->num_cpus     = 1;
diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index 4ee32ea99d..f74561ecdc 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -666,6 +666,7 @@ static void aspeed_soc_ast2600_class_init(ObjectClass *oc, void *data)
     sc->wdts_num     = 4;
     sc->macs_num     = 4;
     sc->uarts_num    = 13;
+    sc->uarts_base   = ASPEED_DEV_UART1;
     sc->irqmap       = aspeed_soc_ast2600_irqmap;
     sc->memmap       = aspeed_soc_ast2600_memmap;
     sc->num_cpus     = 2;
diff --git a/hw/arm/aspeed_soc_common.c b/hw/arm/aspeed_soc_common.c
index 123a0c432c..1e8f2558fd 100644
--- a/hw/arm/aspeed_soc_common.c
+++ b/hw/arm/aspeed_soc_common.c
@@ -36,7 +36,7 @@ bool aspeed_soc_uart_realize(AspeedSoCState *s, Error **errp)
     AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s);
     SerialMM *smm;
 
-    for (int i = 0, uart = ASPEED_DEV_UART1; i < sc->uarts_num; i++, uart++) {
+    for (int i = 0, uart = sc->uarts_base; i < sc->uarts_num; i++, uart++) {
         smm = &s->uart[i];
 
         /* Chardev property is set by the machine. */
@@ -58,7 +58,9 @@ bool aspeed_soc_uart_realize(AspeedSoCState *s, Error **errp)
 void aspeed_soc_uart_set_chr(AspeedSoCState *s, int dev, Chardev *chr)
 {
     AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s);
-    int i = dev - ASPEED_DEV_UART1;
+    int uart_first = aspeed_uart_first(sc);
+    int uart_index = aspeed_uart_index(dev);
+    int i = uart_index - uart_first;
 
     g_assert(0 <= i && i < ARRAY_SIZE(s->uart) && i < sc->uarts_num);
     qdev_prop_set_chr(DEVICE(&s->uart[i]), "chardev", chr);
diff --git a/include/hw/arm/aspeed_soc.h b/include/hw/arm/aspeed_soc.h
index 9d0af84a8c..e1a023be53 100644
--- a/include/hw/arm/aspeed_soc.h
+++ b/include/hw/arm/aspeed_soc.h
@@ -140,6 +140,7 @@ struct AspeedSoCClass {
     int wdts_num;
     int macs_num;
     int uarts_num;
+    int uarts_base;
     const int *irqmap;
     const hwaddr *memmap;
     uint32_t num_cpus;
@@ -151,6 +152,7 @@ const char *aspeed_soc_cpu_type(AspeedSoCClass *sc);
 enum {
     ASPEED_DEV_SPI_BOOT,
     ASPEED_DEV_IOMEM,
+    ASPEED_DEV_UART0,
     ASPEED_DEV_UART1,
     ASPEED_DEV_UART2,
     ASPEED_DEV_UART3,
@@ -235,4 +237,19 @@ void aspeed_mmio_map_unimplemented(AspeedSoCState *s, SysBusDevice *dev,
 void aspeed_board_init_flashes(AspeedSMCState *s, const char *flashtype,
                                unsigned int count, int unit0);
 
+static inline int aspeed_uart_index(int uart_dev)
+{
+    return uart_dev - ASPEED_DEV_UART0;
+}
+
+static inline int aspeed_uart_first(AspeedSoCClass *sc)
+{
+    return aspeed_uart_index(sc->uarts_base);
+}
+
+static inline int aspeed_uart_last(AspeedSoCClass *sc)
+{
+    return aspeed_uart_first(sc) + sc->uarts_num - 1;
+}
+
 #endif /* ASPEED_SOC_H */