[WIP] Kinetis KE02 platform support

CMakeLists.txt

@@ -4,8 +4,6 @@
 
 # ASM is crucial
 enable_language(ASM-ATT)
-# Subproject may use tests
-enable_testing()
 
 # Obvious requirement
 cmake_minimum_required(VERSION 3.4)
@@ -138,4 +136,4 @@ add_subdirectory(lib)
 add_subdirectory(dev)
 add_subdirectory(kernel)
 add_dependencies(all_cppcheck ${PROJECT_NAME})
-add_dependencies(${PROJECT_NAME} thecore_validate)
+add_dependencies(${PROJECT_NAME} thecore_validate)

arch/arm_cm/CMakeLists.txt

@@ -3,13 +3,19 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 # ARM Cortex-M architecture
-add_library(arch STATIC startup_arm_cm.S arch.cpp)
+if(TARGET_MCU_ARCH MATCHES "^arm_cm0")
+    # Slightely different architecture used there
+    add_library(arch STATIC startup_arm_cm0.S arch.cpp)
+else()
+    add_library(arch STATIC startup_arm_cm.S arch.cpp)
+endif()
 
 # By default CMake do not pass compile definitions to ASM files.
 # Probably due to the fact that it depends on assembler used and some of the
 # assemblers may not support preprocessing.
 # This command forces use of gcc instead of as. It allows to pass compile definitions
 set_source_files_properties(startup_arm_cm.S PROPERTIES LANGUAGE C)
+set_source_files_properties(startup_arm_cm0.S PROPERTIES LANGUAGE C)
 
 # ASM code requires some symbols present in outer libraries
 target_link_libraries(arch PRIVATE sys)
@@ -54,6 +60,21 @@ if(NOT TARGET_PLATFORM_IS_NOT_CMSIS_COMPLIANT)
     target_sources(arch PUBLIC ${CMAKE_CURRENT_LIST_DIR}/execution.cpp)
 endif()
 
+# Custom stack size
+if(TARGET_STACK_SIZE)
+    target_compile_definitions(arch PRIVATE -D__STACK_SIZE=${TARGET_STACK_SIZE})
+endif()
+
+# Custom heap size
+if(TARGET_HEAP_SIZE)
+    target_compile_definitions(arch PRIVATE -D__HEAP_SIZE=${TARGET_HEAP_SIZE})
+endif()
+
+# Kinetis-specific definitions
+if(TARGET_KINETIS_FLASH_PROTECT_SECTION)
+    target_compile_definitions(arch PRIVATE -DTARGET_KINETIS_FLASH_PROTECT_SECTION=1)
+endif()
+
 # Apply memory layout
 configure_file(gcc_arm_cm.ld ${CMAKE_CURRENT_BINARY_DIR}/gcc_arm_cm.ld)
 

arch/arm_cm/arch.cpp

@@ -8,9 +8,11 @@ extern "C"  void __attribute__((naked)) arch_delay(uint32_t loop_count)
 {
     (void)loop_count;
 #if defined ( __GNUC__ )
-   __asm("    subs    r0, #1\n"
-          "    bne    arch_delay\n"
-          "    bx     lr");
+   __asm("    .syntax  unified\n"
+         "    subs     r0, #1\n"
+         "    bne      arch_delay\n"
+         "    bx       lr\n"
+         "    .syntax  divided\n");
 #else
 #error Not yet implemented for your compiler
 #endif

arch/arm_cm/export/arch/defs.S

@@ -0,0 +1,12 @@
+#ifndef ARCH_ASM_DEFS_H_
+#define ARCH_ASM_DEFS_H_
+
+/*    Macro to define default handlers. Default handler
+ *    will be weak symbol and just dead loops. They can be
+ *    overwritten by other handlers */
+    .macro	def_irq_handler	handler_name
+    .weak	\handler_name
+    .set	\handler_name, Default_Handler
+    .endm
+
+#endif /* ARCH_ASM_DEFS_H_ */

arch/arm_cm/export/arch/execution.hpp

@@ -18,6 +18,8 @@
 #include <core_cm4.h>
 #elif defined arm_cm3
 #include <core_cm3.h>
+#elif defined arm_cm0plus
+#include <core_cm0plus.h>
 #endif
 
 #include <limits.h>

arch/arm_cm/gcc_arm_cm.ld

@@ -121,6 +121,8 @@ SECTIONS
     } > FLASH
     */
 
+    . = ALIGN(4);
+
     __etext = .;
 
     .data : AT (__etext)
@@ -129,7 +131,6 @@ SECTIONS
         *(vtable)
         *(.data*)
 
-        . = ALIGN(4);
         /* preinit data */
         PROVIDE_HIDDEN (__preinit_array_start = .);
         KEEP(*(.preinit_array))

arch/arm_cm/startup_arm_cm.S

@@ -51,6 +51,8 @@ __StackLimit:
 __StackTop:
     .size	__StackTop, . - __StackTop
 
+    .include "arch/defs.S"
+
     .section .heap
     .align	3
 #ifdef __HEAP_SIZE
@@ -238,14 +240,6 @@ Default_Handler:
     b	.
     .size	Default_Handler, . - Default_Handler
 
-/*    Macro to define default handlers. Default handler
- *    will be weak symbol and just dead loops. They can be
- *    overwritten by other handlers */
-    .macro	def_irq_handler	handler_name
-    .weak	\handler_name
-    .set	\handler_name, Default_Handler
-    .endm
-
     def_irq_handler	NMI_Handler
     def_irq_handler	HardFault_Handler
     def_irq_handler	MemManage_Handler