iar: toolchain: Cortex-M85 support

Add support in IAR build system for Cortex-M85.

Signed-off-by: Robin Kastberg <[email protected]>

Author: RobinKastberg

cmake/compiler/iar/iccarm-cpu.cmake

@@ -36,6 +36,16 @@ if("${ARCH}" STREQUAL "arm")
     else()
       set(ICCARM_CPU Cortex-M55.no_dsp)
     endif()
+  elseif(CONFIG_CPU_CORTEX_M85)
+    if(CONFIG_ARMV8_1_M_MVEF)
+      set(ICCARM_CPU Cortex-M85)
+    elseif(CONFIG_ARMV8_1_M_MVEI)
+      set(ICCARM_CPU Cortex-M85.no_mve)
+    elseif(CONFIG_ARMV8_M_DSP)
+      set(ICCARM_CPU Cortex-M85.no_mve)
+    else()
+      set(ICCARM_CPU Cortex-M85.no_dsp)
+    endif()
   elseif(CONFIG_CPU_CORTEX_R4)
     if(CONFIG_FPU AND CONFIG_CPU_HAS_VFP)
       set(ICCARM_CPU Cortex-R4F)

cmake/compiler/iar/target.cmake

@@ -122,6 +122,18 @@ if("${IAR_TOOLCHAIN_VARIANT}" STREQUAL "iccarm")
     if(CONFIG_FPU)
       list(APPEND IAR_COMMON_FLAGS --fpu=${ICCARM_FPU})
       list(APPEND IAR_ASM_FLAGS -mfpu=${GCC_M_FPU})
+      if(CONFIG_DCLS AND NOT CONFIG_FP_HARDABI)
+        # If the processor is equipped with VFP and configured in DCLS topology,
+        # the FP "hard" ABI must be used in order to facilitate the FP register
+        # initialisation and synchronisation.
+        set(FORCE_FP_HARDABI TRUE)
+      endif()
+
+      if(CONFIG_FP_HARDABI OR FORCE_FP_HARDABI)
+        list(APPEND IAR_ASM_FLAGS -mfloat-abi=hard)
+      elseif(CONFIG_FP_SOFTABI)
+        list(APPEND ARM_ASM_FLAGS -mfloat-abi=softfp)
+      endif()
     endif()
   endif()