arm/Kconfig: add cortex-m85 config

Signed-off-by: wangbowen6 <wangbowen6@xiaomi.com>

arch/arm/Kconfig

@@ -910,6 +910,23 @@ config ARCH_CORTEXM55
 	select ARCH_HAVE_USAGEFAULT_DEBUG
 	select ARCH_HAVE_SECUREFAULT_DEBUG if ARCH_TRUSTZONE_SECURE
 
+config ARCH_CORTEXM85
+	bool
+	default n
+	select ARM_THUMB
+	select ARCH_ARMV8M
+	select ARCH_HAVE_IRQPRIO
+	select ARCH_HAVE_IRQTRIGGER
+	select ARCH_HAVE_RAMVECTORS
+	select ARCH_HAVE_HIPRI_INTERRUPT
+	select ARCH_HAVE_RESET
+	select ARCH_HAVE_TESTSET
+	select ARCH_HAVE_HARDFAULT_DEBUG
+	select ARCH_HAVE_MEMFAULT_DEBUG
+	select ARCH_HAVE_BUSFAULT_DEBUG
+	select ARCH_HAVE_USAGEFAULT_DEBUG
+	select ARCH_HAVE_SECUREFAULT_DEBUG if ARCH_TRUSTZONE_SECURE
+
 config ARCH_FAMILY
 	string
 	default "arm"		if ARCH_ARM7TDMI || ARCH_ARM920T || ARCH_ARM926EJS || ARCH_ARM1136J || ARCH_ARM1156T2 || ARCH_ARM1176JZ

arch/arm/src/armv8-m/Toolchain.defs

@@ -46,6 +46,16 @@ else ifeq ($(CONFIG_ARCH_CORTEXM55),y)
   ifeq ($(CONFIG_ARCH_FPU),y)
     TOOLCHAIN_MFLOAT := -mfpu=fpv5-d16
   endif
+else ifeq ($(CONFIG_ARCH_CORTEXM85),y)
+  TOOLCHAIN_MTUNE    := -mtune=cortex-m85
+  ifeq ($(CONFIG_ARM_HAVE_MVE),y)
+    TOOLCHAIN_MARCH  := -march=armv8.1-m.main+mve.fp+fp.dp
+  else
+    TOOLCHAIN_MARCH  := -march=armv8.1-m.main$(EXTCPUFLAGS)
+  endif
+  ifeq ($(CONFIG_ARCH_FPU),y)
+    TOOLCHAIN_MFLOAT := -mfpu=fpv5-d16
+  endif
 endif
 
 ifeq ($(CONFIG_ARCH_FPU),y)
@@ -82,6 +92,12 @@ ifeq ($(CONFIG_ARM_TOOLCHAIN_CLANG),y)
     else
       TOOLCHAIN_MARCH += --config armv8.1m.main_soft_nofp_nomve_nosys
     endif
+  else ifeq ($(CONFIG_ARCH_CORTEXM85),y)
+    ifeq ($(CONFIG_ARCH_FPU),y)
+      TOOLCHAIN_MARCH += --config armv8.1m.main_hard_fp
+    else
+      TOOLCHAIN_MARCH += --config armv8.1m.main_soft_nofp_nomve
+    endif
   endif
 
 else ifeq ($(CONFIG_ARM_TOOLCHAIN_ARMCLANG),y)
@@ -114,6 +130,20 @@ else ifeq ($(CONFIG_ARM_TOOLCHAIN_ARMCLANG),y)
         LDFLAGS += --cpu=Cortex-M55.no_mve.no_fp
       endif
     endif
+  else ifeq ($(CONFIG_ARCH_CORTEXM85),y)
+    ifeq ($(CONFIG_ARM_HAVE_MVE),y)
+      ifeq ($(CONFIG_ARCH_FPU),y)
+        LDFLAGS += --cpu=Cortex-M85
+      else
+        LDFLAGS += --cpu=Cortex-M85.no_fp
+      endif
+    else
+      ifeq ($(CONFIG_ARCH_FPU),y)
+        LDFLAGS += --cpu=Cortex-M85.no_mve
+      else
+        LDFLAGS += --cpu=Cortex-M85.no_mve.no_fp
+      endif
+    endif
   endif
 
 endif