ports/nrf: Moving nrf51/52 port to new ports directory

1 files changed, 52 insertions, 0 deletions

diff --git a/ports/nrf/gccollect.c b/ports/nrf/gccollect.c
new file mode 100644
index 000000000..b7aa57a55
--- /dev/null
+++ b/ports/nrf/gccollect.c
@@ -0,0 +1,52 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Glenn Ruben Bakke
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+
+#include "py/obj.h"
+#include "py/gc.h"
+#include "gccollect.h"
+
+static inline uint32_t get_msp(void)
+{
+	register uint32_t result;
+	__asm volatile ("MRS %0, msp\n" : "=r" (result) );
+	return(result);
+}
+
+void gc_collect(void) {
+    // start the GC
+    gc_collect_start();
+
+    mp_uint_t sp = get_msp(); // Get stack pointer
+    
+    // trace the stack, including the registers (since they live on the stack in this function)
+    gc_collect_root((void**)sp, ((uint32_t)&_ram_end - sp) / sizeof(uint32_t));
+
+    // end the GC
+    gc_collect_end();
+}