first attempt at porting libopencm3 to energymicro

unless sources are explicitly given, the linker scripts and make files were copied over from the stm32/f1 port.
2012-02-25 18:57:11 +01:00
parent 2b3f07ee08
commit 2180a02e2f
14 changed files with 559 additions and 0 deletions
@@ -0,0 +1,92 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>,
+ *               2012 chrysn <chrysn@fsfe.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/efm32/tinygecko/vector.h>
+
+#define WEAK __attribute__ ((weak))
+
+/* Symbols exported by the linker script(s). */
+extern unsigned _etext, _data, _edata, _ebss, _stack;
+
+void main(void);
+void reset_handler(void);
+void blocking_handler(void);
+void null_handler(void);
+
+void WEAK nmi_handler(void);
+void WEAK hard_fault_handler(void);
+void WEAK mem_manage_handler(void);
+void WEAK bus_fault_handler(void);
+void WEAK usage_fault_handler(void);
+void WEAK sv_call_handler(void);
+void WEAK debug_monitor_handler(void);
+void WEAK pend_sv_handler(void);
+void WEAK sys_tick_handler(void);
+
+
+__attribute__ ((section(".vectors")))
+efm32_vector_table_t vector_table = {
+	.initial_sp_value = &_stack,
+	.reset = reset_handler,
+	.nmi = nmi_handler,
+	.hard_fault = hard_fault_handler,
+	.memory_manage_fault = mem_manage_handler,
+	.bus_fault = bus_fault_handler,
+	.usage_fault = usage_fault_handler,
+	.sv_call = sv_call_handler,
+	.pend_sv = pend_sv_handler,
+	.systick = sys_tick_handler,
+};
+
+void reset_handler(void)
+{
+	volatile unsigned *src, *dest;
+
+	__asm__("MSR msp, %0" : : "r"(&_stack));
+
+	for (src = &_etext, dest = &_data; dest < &_edata; src++, dest++)
+		*dest = *src;
+
+	while (dest < &_ebss)
+		*dest++ = 0;
+
+	/* Call the application's entry point. */
+	main();
+}
+
+void blocking_handler(void)
+{
+	while (1) ;
+}
+
+void null_handler(void)
+{
+	/* Do nothing. */
+}
+
+#pragma weak nmi_handler = null_handler
+#pragma weak hard_fault_handler = blocking_handler
+#pragma weak mem_manage_handler = blocking_handler
+#pragma weak bus_fault_handler = blocking_handler
+#pragma weak usage_fault_handler = blocking_handler
+#pragma weak sv_call_handler = null_handler
+#pragma weak debug_monitor_handler = null_handler
+#pragma weak pend_sv_handler = null_handler
+#pragma weak sys_tick_handler = null_handler