diff --git a/arch/arc/dts/nsim.dts b/arch/arc/dts/nsim.dts
index 243ecb178e46319f1c36b03c806e7e22fc107b86..43f281dfec08d702d5a6952a5039b0912d2d6b1b 100644
--- a/arch/arc/dts/nsim.dts
+++ b/arch/arc/dts/nsim.dts
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2015-2016, 2020 Synopsys, Inc. (www.synopsys.com)
  */
 /dts-v1/;
 
@@ -10,7 +10,7 @@
 	model = "snps,nsim";
 
 	aliases {
-		console = &arcuart0;
+		console = &uart0;
 	};
 
 	cpu_card {
@@ -22,9 +22,11 @@
 		};
 	};
 
-	arcuart0: serial@0xc0fc1000 {
-		compatible = "snps,arc-uart";
-		reg = <0xc0fc1000 0x100>;
+	uart0: serial@f0000000 {
+		compatible = "snps,dw-apb-uart";
+		reg = <0xf0000000 0x1000>;
+		reg-shift = <2>;
+		reg-io-width = <4>;
 		clock-frequency = <70000000>;
 	};
 
diff --git a/configs/nsim_700_defconfig b/configs/nsim_700_defconfig
index 5633113b090f36da8b421158190418c60c6f61b2..2d4a58b178e18d5733117045a79ed8ce511dbd98 100644
--- a/configs/nsim_700_defconfig
+++ b/configs/nsim_700_defconfig
@@ -1,13 +1,13 @@
 CONFIG_ARC=y
 CONFIG_TARGET_NSIM=y
 CONFIG_SYS_TEXT_BASE=0x81000000
-CONFIG_DEBUG_UART_BASE=0xc0fc1000
+CONFIG_DEBUG_UART_BASE=0xf0000000
 CONFIG_DEBUG_UART_CLOCK=70000000
 CONFIG_SYS_CLK_FREQ=70000000
 CONFIG_DEBUG_UART=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
-CONFIG_BOOTARGS="console=ttyARC0,115200n8"
+CONFIG_BOOTARGS="console=ttyS0,115200n8"
 CONFIG_SYS_PROMPT="nsim# "
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_OF_CONTROL=y
@@ -16,6 +16,6 @@ CONFIG_DEFAULT_DEVICE_TREE="nsim"
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_DM=y
 CONFIG_DM_SERIAL=y
-CONFIG_DEBUG_ARC_SERIAL=y
-CONFIG_ARC_SERIAL=y
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550=y
 CONFIG_USE_PRIVATE_LIBGCC=y
diff --git a/configs/nsim_700be_defconfig b/configs/nsim_700be_defconfig
index 40f7ec7e1f4aaa36295e122dbba183dc7df7e5f3..61eea91449ab546c268220c30bf224068d26a819 100644
--- a/configs/nsim_700be_defconfig
+++ b/configs/nsim_700be_defconfig
@@ -2,13 +2,13 @@ CONFIG_ARC=y
 CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_TARGET_NSIM=y
 CONFIG_SYS_TEXT_BASE=0x81000000
-CONFIG_DEBUG_UART_BASE=0xc0fc1000
+CONFIG_DEBUG_UART_BASE=0xf0000000
 CONFIG_DEBUG_UART_CLOCK=70000000
 CONFIG_SYS_CLK_FREQ=70000000
 CONFIG_DEBUG_UART=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
-CONFIG_BOOTARGS="console=ttyARC0,115200n8"
+CONFIG_BOOTARGS="console=ttyS0,115200n8"
 CONFIG_SYS_PROMPT="nsim# "
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_OF_CONTROL=y
@@ -17,6 +17,6 @@ CONFIG_DEFAULT_DEVICE_TREE="nsim"
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_DM=y
 CONFIG_DM_SERIAL=y
-CONFIG_DEBUG_ARC_SERIAL=y
-CONFIG_ARC_SERIAL=y
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550=y
 CONFIG_USE_PRIVATE_LIBGCC=y
diff --git a/configs/nsim_hs38_defconfig b/configs/nsim_hs38_defconfig
index 2820a6fca33cb9a8299601451f5d6560e552bc50..ce68de3251d9b715d8adc800da8dfeeee441f07f 100644
--- a/configs/nsim_hs38_defconfig
+++ b/configs/nsim_hs38_defconfig
@@ -2,13 +2,13 @@ CONFIG_ARC=y
 CONFIG_ISA_ARCV2=y
 CONFIG_TARGET_NSIM=y
 CONFIG_SYS_TEXT_BASE=0x81000000
-CONFIG_DEBUG_UART_BASE=0xc0fc1000
+CONFIG_DEBUG_UART_BASE=0xf0000000
 CONFIG_DEBUG_UART_CLOCK=70000000
 CONFIG_SYS_CLK_FREQ=70000000
 CONFIG_DEBUG_UART=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
-CONFIG_BOOTARGS="console=ttyARC0,115200n8"
+CONFIG_BOOTARGS="console=ttyS0,115200n8"
 CONFIG_SYS_PROMPT="nsim# "
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_OF_CONTROL=y
@@ -17,6 +17,6 @@ CONFIG_DEFAULT_DEVICE_TREE="nsim"
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_DM=y
 CONFIG_DM_SERIAL=y
-CONFIG_DEBUG_ARC_SERIAL=y
-CONFIG_ARC_SERIAL=y
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550=y
 CONFIG_USE_PRIVATE_LIBGCC=y
diff --git a/configs/nsim_hs38be_defconfig b/configs/nsim_hs38be_defconfig
index e533fae2b17c433b0bfd87585ed6efc5b6fd9691..5d2ea59d52c075686fd8a94df6930e8ceb9432bc 100644
--- a/configs/nsim_hs38be_defconfig
+++ b/configs/nsim_hs38be_defconfig
@@ -3,13 +3,13 @@ CONFIG_ISA_ARCV2=y
 CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_TARGET_NSIM=y
 CONFIG_SYS_TEXT_BASE=0x81000000
-CONFIG_DEBUG_UART_BASE=0xc0fc1000
+CONFIG_DEBUG_UART_BASE=0xf0000000
 CONFIG_DEBUG_UART_CLOCK=70000000
 CONFIG_SYS_CLK_FREQ=70000000
 CONFIG_DEBUG_UART=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
-CONFIG_BOOTARGS="console=ttyARC0,115200n8"
+CONFIG_BOOTARGS="console=ttyS0,115200n8"
 CONFIG_SYS_PROMPT="nsim# "
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_OF_CONTROL=y
@@ -18,6 +18,6 @@ CONFIG_DEFAULT_DEVICE_TREE="nsim"
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_DM=y
 CONFIG_DM_SERIAL=y
-CONFIG_DEBUG_ARC_SERIAL=y
-CONFIG_ARC_SERIAL=y
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550=y
 CONFIG_USE_PRIVATE_LIBGCC=y