M453: Support bare metal

Relevant modifications to make TOOLCHAIN_* directories clear:
1. Remove TOOLCHAIN_ARM_STD
2. Rename TOOLCHAIN_ARM_MICRO to TOOLCHAIN_ARM

targets/TARGET_NUVOTON/TARGET_M451/device/TOOLCHAIN_ARM_STD/M453.sct

@@ -1,57 +0,0 @@
-#! armcc -E
-
-/*
- * Copyright (c) 2020, Nuvoton Technology Corporation
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "../M451_mem.h"
-
-#if !defined(MBED_BOOT_STACK_SIZE)
-  #define MBED_BOOT_STACK_SIZE      0x400
-#endif
-
-#define VECTOR_SIZE                 (4*(16 + 64))
-
-LR_IROM1  MBED_APP_START  MBED_APP_SIZE  {
-  ER_IROM1  MBED_APP_START  MBED_APP_SIZE  {  ; load address = execution address
-   *(RESET, +First)
-   *(InRoot$$Sections)
-   .ANY (+RO)
-  }
-
-  ARM_LIB_STACK MBED_RAM_APP_START EMPTY MBED_BOOT_STACK_SIZE {
-  }
-
-  /* VTOR[TBLOFF] alignment requires:
-   *
-   * 1. Minumum 32-word
-   * 2. Rounding up to the next power of two of table size
-   */
-  ER_IRAMVEC  AlignExpr(+0, 512)  EMPTY  VECTOR_SIZE  {  ; Reserve for vectors
-  }
-
-  RW_IRAM1  AlignExpr(+0, 16)  {  ; 16 byte-aligned
-   .ANY (+RW +ZI)
-  }
-
-  ARM_LIB_HEAP AlignExpr(+0, 16) EMPTY (MBED_RAM_APP_START + MBED_RAM_APP_SIZE - AlignExpr(ImageLimit(RW_IRAM1), 16)) {
-  }
-}
-
-ScatterAssert(LoadLimit(LR_IROM1) <= (MBED_APP_START + MBED_APP_SIZE))
-ScatterAssert(ImageLimit(ARM_LIB_HEAP) <= (MBED_RAM_APP_START + MBED_RAM_APP_SIZE))
-

targets/targets.json

@@ -9961,7 +9961,6 @@
         "is_disk_virtual": true,
         "supported_toolchains": [
             "ARM",
-            "uARM",
             "GCC_ARM",
             "IAR"
         ],
@@ -10025,9 +10024,23 @@
             "FLASHIAP"
         ],
         "release_versions": [
-            "2",
             "5"
         ],
+        "supported_c_libs": {
+            "arm": [
+                "std",
+                "small"
+            ],
+            "gcc_arm": [
+                "std",
+                "small"
+            ],
+            "iar": [
+                "std"
+            ]
+        },
+        "c_lib": "small",
+        "supported_application_profiles": ["bare-metal"],
         "sectors": [
             [
                 0,