diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 0949fa2899..a768a79170 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -738,6 +738,20 @@ config ARCH_CORTEXM35P
 	select ARCH_HAVE_HARDFAULT_DEBUG
 	select ARCH_HAVE_MEMFAULT_DEBUG
 
+config ARCH_CORTEXM55
+	bool
+	default n
+	select ARCH_ARMV8M
+	select ARCH_HAVE_IRQPRIO
+	select ARCH_HAVE_IRQTRIGGER
+	select ARCH_HAVE_RAMVECTORS
+	select ARCH_HAVE_LAZYFPU
+	select ARCH_HAVE_HIPRI_INTERRUPT
+	select ARCH_HAVE_RESET
+	select ARCH_HAVE_TESTSET
+	select ARCH_HAVE_HARDFAULT_DEBUG
+	select ARCH_HAVE_MEMFAULT_DEBUG
+
 config ARCH_FAMILY
 	string
 	default "arm"		if ARCH_ARM7TDMI || ARCH_ARM920T || ARCH_ARM926EJS || ARCH_ARM1136J || ARCH_ARM1156T2 || ARCH_ARM1176JZ
diff --git a/arch/arm/src/armv8-m/Toolchain.defs b/arch/arm/src/armv8-m/Toolchain.defs
index 760ad42096..0254e12b74 100644
--- a/arch/arm/src/armv8-m/Toolchain.defs
+++ b/arch/arm/src/armv8-m/Toolchain.defs
@@ -96,6 +96,14 @@ else ifeq ($(CONFIG_ARCH_CORTEXM35P),y)
   else
     TOOLCHAIN_MFLOAT := -mfloat-abi=soft
   endif
+else ifeq ($(CONFIG_ARCH_CORTEXM55),y)
+  TOOLCHAIN_MCPU     := -mcpu=cortex-m55
+  TOOLCHAIN_MARCH    := -march=armv8.1-m.main+dsp
+  ifeq ($(CONFIG_ARCH_FPU),y)
+    TOOLCHAIN_MFLOAT := -mfpu=fpv5-d16 -mfloat-abi=hard
+  else
+    TOOLCHAIN_MFLOAT := -mfloat-abi=soft
+  endif
 endif