Merge pull request #14588 from Patater/mbed-libs-for-m55

Add v8.1-M architecture awareness

drivers/include/drivers/MbedCRC.h

@@ -649,6 +649,7 @@ private:
 #if (__ARM_ARCH_7M__      == 1U) || \
     (__ARM_ARCH_7EM__     == 1U) || \
     (__ARM_ARCH_8M_MAIN__ == 1U) || \
+    (__ARM_ARCH_8_1M_MAIN__ == 1U) || \
     (__ARM_ARCH_7A__      == 1U)
     /* ARM that has Thumb-2 - same unified assembly is good for either ARM or Thumb state (LSRS; IT CS; EORCS reg/imm) */
 #define MBED_CRC_ARM_THUMB2     1

hal/source/mpu/mbed_mpu_v8m.c

@@ -18,7 +18,7 @@
 #include "platform/mbed_assert.h"
 #include "cmsis.h"
 
-#if ((__ARM_ARCH_8M_BASE__ == 1U) || (__ARM_ARCH_8M_MAIN__ == 1U)) && \
+#if ((__ARM_ARCH_8M_BASE__ == 1U) || (__ARM_ARCH_8M_MAIN__ == 1U) || (__ARM_ARCH_8_1M_MAIN__ == 1U)) && \
     defined (__MPU_PRESENT) && (__MPU_PRESENT == 1U) && \
     !defined(MBED_MPU_CUSTOM)
 

hal/tests/TESTS/mbed_hal/mpu/main.cpp

@@ -177,7 +177,10 @@ utest::v1::status_t fault_override_teardown(const Case *const source, const size
 Case cases[] = {
     Case("MPU - init", fault_override_setup, mpu_init_test, fault_override_teardown),
     Case("MPU - free", fault_override_setup, mpu_free_test, fault_override_teardown),
-#if !((__ARM_ARCH_8M_BASE__ == 1U) || (__ARM_ARCH_8M_MAIN__ == 1U))
+#if !((__ARM_ARCH_8M_BASE__ == 1U) || \
+      (__ARM_ARCH_8M_MAIN__ == 1U) || \
+      (__ARM_ARCH_8_1M_MAIN__ == 1U) \
+     )
     // Skip fault tests for ARMv8-M until a fault handler hook is provided
     Case("MPU - data fault", fault_override_setup, mpu_fault_test_data, fault_override_teardown),
     Case("MPU - bss fault", fault_override_setup, mpu_fault_test_bss, fault_override_teardown),

platform/include/platform/mbed_atomic.h

@@ -69,7 +69,8 @@ typedef enum mbed_memory_order {
 #if ((__ARM_ARCH_7M__      == 1U) || \
     (__ARM_ARCH_7EM__     == 1U) || \
     (__ARM_ARCH_8M_BASE__ == 1U) || \
-    (__ARM_ARCH_8M_MAIN__ == 1U)) || \
+    (__ARM_ARCH_8M_MAIN__ == 1U) || \
+    (__ARM_ARCH_8_1M_MAIN__ == 1U)) || \
     (__ARM_ARCH_7A__ == 1U)
 #define MBED_EXCLUSIVE_ACCESS      1U
 #define MBED_EXCLUSIVE_ACCESS_THUMB1 (__ARM_ARCH_8M_BASE__ == 1U)

tools/cmake/cores/Cortex-M55.cmake

@@ -17,6 +17,14 @@ elseif(${MBED_TOOLCHAIN} STREQUAL "ARM")
     )
 endif()
 
+# We'd like to use just "-mcpu=cortex-m55" in common_options, but due to a bug
+# in armclang passing options to armasm, we use the following flags as a
+# workaround to select M55.
+list(APPEND asm_compile_options
+    -mcpu=cortex-r7
+    -Wa,--cpu=cortex-m55
+)
+
 function(mbed_set_cpu_core_definitions target)
     target_compile_definitions(${target}
         INTERFACE