diff --git a/plat/arm/css/sgi/include/sgi_base_platform_def.h b/plat/arm/css/sgi/include/sgi_base_platform_def.h
index 9c3beb5..c9c8c04 100644
--- a/plat/arm/css/sgi/include/sgi_base_platform_def.h
+++ b/plat/arm/css/sgi/include/sgi_base_platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2022, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2021, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -130,21 +130,6 @@
 # define PLATFORM_STACK_SIZE 0x440
 #endif
 
-/* PL011 UART related constants */
-#define SOC_CSS_SEC_UART_BASE			UL(0x2A410000)
-#define SOC_CSS_NSEC_UART_BASE			UL(0x2A400000)
-#define SOC_CSS_UART_SIZE			UL(0x10000)
-#define SOC_CSS_UART_CLK_IN_HZ			UL(7372800)
-
-/* UART related constants */
-#define PLAT_ARM_BOOT_UART_BASE			SOC_CSS_SEC_UART_BASE
-#define PLAT_ARM_BOOT_UART_CLK_IN_HZ		SOC_CSS_UART_CLK_IN_HZ
-
-#define PLAT_ARM_RUN_UART_BASE			SOC_CSS_SEC_UART_BASE
-#define PLAT_ARM_RUN_UART_CLK_IN_HZ		SOC_CSS_UART_CLK_IN_HZ
-
-#define PLAT_ARM_CRASH_UART_BASE		SOC_CSS_SEC_UART_BASE
-#define PLAT_ARM_CRASH_UART_CLK_IN_HZ		SOC_CSS_UART_CLK_IN_HZ
 
 #define PLAT_ARM_NSTIMER_FRAME_ID	0
 
diff --git a/plat/arm/css/sgi/include/sgi_soc_css_def.h b/plat/arm/css/sgi/include/sgi_soc_css_def.h
index f78b45a..8d3d1b9 100644
--- a/plat/arm/css/sgi/include/sgi_soc_css_def.h
+++ b/plat/arm/css/sgi/include/sgi_soc_css_def.h
@@ -44,4 +44,14 @@
 #define PLAT_ARM_NVM_BASE		V2M_FLASH0_BASE
 #define PLAT_ARM_NVM_SIZE		(V2M_FLASH0_SIZE - V2M_FLASH_BLOCK_SIZE)
 
+/* UART related constants */
+#define PLAT_ARM_BOOT_UART_BASE			SOC_CSS_UART0_BASE
+#define PLAT_ARM_BOOT_UART_CLK_IN_HZ		SOC_CSS_UART0_CLK_IN_HZ
+
+#define PLAT_ARM_RUN_UART_BASE			SOC_CSS_UART1_BASE
+#define PLAT_ARM_RUN_UART_CLK_IN_HZ		SOC_CSS_UART1_CLK_IN_HZ
+
+#define PLAT_ARM_CRASH_UART_BASE		PLAT_ARM_RUN_UART_BASE
+#define PLAT_ARM_CRASH_UART_CLK_IN_HZ		PLAT_ARM_RUN_UART_CLK_IN_HZ
+
 #endif /* SGI_SOC_CSS_DEF_H */
diff --git a/plat/arm/css/sgi/include/sgi_soc_css_def_v2.h b/plat/arm/css/sgi/include/sgi_soc_css_def_v2.h
index acf31eb..639b687 100644
--- a/plat/arm/css/sgi/include/sgi_soc_css_def_v2.h
+++ b/plat/arm/css/sgi/include/sgi_soc_css_def_v2.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021-2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -24,10 +24,17 @@
 
 #define SOC_CSS_PCIE_CONTROL_BASE	UL(0x0ef20000)
 
+/* PL011 UART related constants */
+#define SOC_CSS_UART1_BASE		UL(0x0ef80000)
+#define SOC_CSS_UART0_BASE		UL(0x0ef70000)
+
 /* Memory controller */
 #define SOC_MEMCNTRL_BASE		UL(0x10000000)
 #define SOC_MEMCNTRL_SIZE		UL(0x10000000)
 
+#define SOC_CSS_UART0_CLK_IN_HZ		UL(7372800)
+#define SOC_CSS_UART1_CLK_IN_HZ		UL(7372800)
+
 /* SoC NIC-400 Global Programmers View (GPV) */
 #define SOC_CSS_NIC400_BASE		UL(0x0ED00000)
 
@@ -199,4 +206,17 @@
 #define PLAT_ARM_NVM_BASE		V2M_FLASH0_BASE
 #define PLAT_ARM_NVM_SIZE		(V2M_FLASH0_SIZE - V2M_FLASH_BLOCK_SIZE)
 
+/* UART related constants */
+#define PLAT_ARM_BOOT_UART_BASE			SOC_CSS_UART0_BASE
+#define PLAT_ARM_BOOT_UART_CLK_IN_HZ		SOC_CSS_UART0_CLK_IN_HZ
+
+#define PLAT_ARM_RUN_UART_BASE			SOC_CSS_UART1_BASE
+#define PLAT_ARM_RUN_UART_CLK_IN_HZ		SOC_CSS_UART1_CLK_IN_HZ
+
+#define PLAT_ARM_SP_MIN_RUN_UART_BASE		SOC_CSS_UART1_BASE
+#define PLAT_ARM_SP_MIN_RUN_UART_CLK_IN_HZ	SOC_CSS_UART1_CLK_IN_HZ
+
+#define PLAT_ARM_CRASH_UART_BASE		PLAT_ARM_RUN_UART_BASE
+#define PLAT_ARM_CRASH_UART_CLK_IN_HZ		PLAT_ARM_RUN_UART_CLK_IN_HZ
+
 #endif /* SGI_SOC_CSS_DEF_V2_H */