Add Corstone-300 target
Change-Id: I34e9845abdccb3363953bd70fad7c6420865291e
diff --git a/cmake/toolchain/armclang.cmake b/cmake/toolchain/armclang.cmake
new file mode 100644
index 0000000..72eb456
--- /dev/null
+++ b/cmake/toolchain/armclang.cmake
@@ -0,0 +1,86 @@
+#
+# Copyright (c) 2020 Arm Limited. All rights reserved.
+#
+# 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
+#
+# 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.
+#
+
+if (NOT TARGET_CPU)
+ set(TARGET_CPU "cortex-m4")
+endif()
+
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_C_COMPILER "armclang")
+set(CMAKE_CXX_COMPILER "armclang")
+set(CMAKE_LINKER "armlink")
+
+# Convert TARGET_CPU=Cortex-M33+nofp+nodsp into
+# - CMAKE_SYSTEM_PROCESSOR=cortex-m33
+# - __CPU_FEATURES=no-fp;no-dsp
+string(REPLACE "+" ";" __CPU_FEATURES ${TARGET_CPU})
+list(POP_FRONT __CPU_FEATURES CMAKE_SYSTEM_PROCESSOR)
+string(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} CMAKE_SYSTEM_PROCESSOR)
+
+# Link target
+set(__LINK_TARGET ${CMAKE_SYSTEM_PROCESSOR})
+
+if ("nodsp" IN_LIST __CPU_FEATURES)
+ string(APPEND __LINK_TARGET ".no_dsp")
+endif()
+
+if ("nofp" IN_LIST __CPU_FEATURES)
+ string(APPEND __LINK_TARGET ".no_fp")
+endif()
+
+if (CMAKE_SYSTEM_PROCESSOR STREQUAL "cortex-m55")
+ set(__LINK_TARGET 8.1-M.Main.dsp)
+endif()
+
+# Define C/C++ standards
+set(CMAKE_C_STANDARD 99)
+set(CMAKE_CXX_STANDARD 14)
+
+# Compile options
+add_compile_options(
+ -mcpu=${TARGET_CPU}
+ -mthumb
+ "$<$<CONFIG:DEBUG>:-gdwarf-3>"
+ "$<$<COMPILE_LANGUAGE:CXX>:-fno-unwind-tables;-fno-rtti;-fno-exceptions>")
+
+# Link options
+add_link_options(
+ --cpu=${__LINK_TARGET}
+ --lto
+ --info common,debug,sizes,totals,veneers,unused
+ --symbols
+ --diag_suppress=L6439W)
+
+# Compilation warnings
+add_compile_options(
+ -Wall
+ -Wextra
+ -Wsign-compare
+ -Wunused
+ -Wswitch-default
+ -Wformat
+ -Wdouble-promotion
+ -Wredundant-decls
+ -Wshadow
+ -Wcast-align
+ -Wnull-dereference
+ -Wno-format-extra-args
+ -Wno-unused-function
+ -Wno-unused-label
+ -Wno-missing-field-initializers
+ -Wno-return-type)