boards: Tock: Initial commit of Tock support

Signed-off-by: Alistair Francis <alistair@alistair23.me>

Author: alistair23

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "src/peripherals/atecc608a-tnglora-se/cryptoauthlib"]
 	path = src/peripherals/atecc608a-tnglora-se/cryptoauthlib
 	url = https://github.com/MicrochipTech/cryptoauthlib
+[submodule "src/boards/Tock/libtock-c"]
+	path = src/boards/Tock/libtock-c
+	url = https://github.com/tock/libtock-c.git

README.md

@@ -62,6 +62,9 @@ The [Porting Guide](https://stackforce.github.io/LoRaMac-doc/LoRaMac-doc-v4.7.0/
 * SAMR34
   * [SAMR34 platform documentation](doc/SAMR34-platform.md)
 
+* Tock
+  * [Tock](doc/Tock.md)
+
 ## Getting Started
 
 ### Prerequisites

cmake/tock.cmake

@@ -0,0 +1,29 @@
+## License:  Revised BSD License, see LICENSE.TXT file included in the project
+## Authors:  Alistair Francis <alistair@alistair23.me>
+##
+## Tock target specific CMake file
+##
+
+if(NOT DEFINED LINKER_SCRIPT)
+message(FATAL_ERROR "No linker script defined")
+endif(NOT DEFINED LINKER_SCRIPT)
+message("Linker script: ${LINKER_SCRIPT}")
+
+
+#---------------------------------------------------------------------------------------
+# Set compiler/linker flags
+#---------------------------------------------------------------------------------------
+
+set(STACK_SIZE 2048)
+set(APP_HEAP_SIZE 1024)
+set(KERNEL_HEAP_SIZE 1024)
+
+# Object build options
+set(OBJECT_GEN_FLAGS "-mthumb -g2 -fno-builtin -mcpu=cortex-m4 -Wall -Wextra -pedantic -Wno-unused-parameter -ffunction-sections -fdata-sections -fomit-frame-pointer -mabi=aapcs -fno-unroll-loops -ffast-math -ftree-vectorize -frecord-gcc-switches -gdwarf-2 -Os -fdata-sections -ffunction-sections -fstack-usage -Wl,--emit-relocs -fPIC -mthumb -mfloat-abi=soft -msingle-pic-base -mpic-register=r9 -mno-pic-data-is-text-relative -D__TOCK__ -DSVCALL_AS_NORMAL_FUNCTION -DSOFTDEVICE_s130")
+
+set(CMAKE_C_FLAGS "${OBJECT_GEN_FLAGS} -std=gnu99 " CACHE INTERNAL "C Compiler options")
+set(CMAKE_CXX_FLAGS "${OBJECT_GEN_FLAGS} -std=c++11 " CACHE INTERNAL "C++ Compiler options")
+set(CMAKE_ASM_FLAGS "${OBJECT_GEN_FLAGS} -x assembler-with-cpp " CACHE INTERNAL "ASM Compiler options")
+
+# Linker flags
+set(CMAKE_EXE_LINKER_FLAGS "-Wl,--gc-sections --specs=nano.specs --specs=nosys.specs -mthumb -g2 -mcpu=cortex-m4 -mabi=aapcs -T${LINKER_SCRIPT} -Wl,-Map=${CMAKE_PROJECT_NAME}.map -Xlinker --defsym=STACK_SIZE=${STACK_SIZE} -Xlinker --defsym=APP_HEAP_SIZE=${APP_HEAP_SIZE} -Xlinker --defsym=KERNEL_HEAP_SIZE=${KERNEL_HEAP_SIZE} -nostdlib -Wl,--start-group" CACHE INTERNAL "Linker options")

doc/Tock.md

@@ -0,0 +1,4 @@
+# TockNAMote72 platform support documents
+
+This is support for the [Tock](https://github.com/tock/tock) operating system,
+allowing the library to run as a userspace application on Tock boards.

src/CMakeLists.txt

@@ -183,6 +183,17 @@ elseif(BOARD STREQUAL B-L072Z-LRWAN1)
 
     # Configure radio
     set(RADIO sx1276 CACHE INTERNAL "Radio sx1276 selected")
+
+elseif(BOARD STREQUAL Tock)
+    # Configure toolchain for Tock
+    set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/boards/Tock/libtock-c/userland_generic.ld)
+    include(tock)
+
+    # Build platform specific board implementation
+    add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/boards/Tock)
+
+    # Configure radio
+    set(RADIO sx126x CACHE INTERNAL "Radio sx126x selected")
 endif()
 
 #---------------------------------------------------------------------------------------

src/apps/ping-pong/CMakeLists.txt

@@ -83,7 +83,13 @@ target_include_directories(${PROJECT_NAME} PUBLIC
 
 set_property(TARGET ${PROJECT_NAME} PROPERTY C_STANDARD 11)
 
-target_link_libraries(${PROJECT_NAME} m)
+# TODO: Remove this
+target_link_libraries(${PROJECT_NAME}
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../boards/Tock/libtock-c/newlib/cortex-m/v7-m/libc.a
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../boards/Tock/libtock-c/newlib/cortex-m/v7-m/libm.a
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../boards/Tock/libtock-c/libtock/build/cortex-m4/libtock.a
+)
+
 
 #---------------------------------------------------------------------------------------
 # Debugging and Binutils