esp8266: New port of Micro Python to ESP8266 wifi module.

1 files changed, 65 insertions, 0 deletions

diff --git a/esp8266/gccollect.c b/esp8266/gccollect.c
new file mode 100644
index 0000000000..460ccb6889
--- /dev/null
+++ b/esp8266/gccollect.c
@@ -0,0 +1,65 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014 Damien P. George
+ *
+ * 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 "mpconfig.h"
+#include "misc.h"
+#include "qstr.h"
+#include "obj.h"
+#include "gc.h"
+#include "gccollect.h"
+
+STATIC uint32_t stack_end;
+
+mp_uint_t gc_helper_get_regs_and_sp(mp_uint_t *regs);
+
+void gc_collect_init(void) {
+    mp_uint_t regs[8];
+    mp_uint_t sp = gc_helper_get_regs_and_sp(regs);
+    stack_end = sp;
+    //printf("stack=%p ram_end=%p %d\n", stack_end, &_ram_end);
+}
+
+void gc_collect(void) {
+    // start the GC
+    gc_collect_start();
+
+    // We need to scan everything in RAM that can hold a pointer.
+    // The data segment is used, but should not contain pointers, so we just scan the bss.
+    gc_collect_root((void**)&_bss_start, ((uint32_t)&_bss_end - (uint32_t)&_bss_start) / sizeof(uint32_t));
+
+    // get the registers and the sp
+    mp_uint_t regs[8];
+    mp_uint_t sp = gc_helper_get_regs_and_sp(regs);
+
+    // trace the stack, including the registers (since they live on the stack in this function)
+    gc_collect_root((void**)sp, (stack_end - sp) / sizeof(uint32_t));
+
+    // end the GC
+    gc_collect_end();
+}