1 files changed, 30 insertions, 0 deletions
diff --git a/02-usart/include/kern/mem.h b/02-usart/include/kern/mem.h
new file mode 100644
index 0000000..d150744
--- /dev/null
+++ b/02-usart/include/kern/mem.h
@@ -0,0 +1,30 @@
+#ifndef MEM_H_
+#define MEM_H_
+
+#include "arch.h"
+#include <stddef.h>
+
+#define DATA_SEGMENT_STOP_ADDR ((uint8_t*) &DATA_SEGMENT_STOP)
+#define DATA_SEGMENT_START_ADDR ((uint8_t*) &DATA_SEGMENT_START)
+
+#define MAX_HEAP_SIZE \
+  ((16384 - (DATA_SEGMENT_STOP_ADDR - DATA_SEGMENT_START_ADDR)) / 4 * 4)
+
+/* allocates memory on the head, which is stored in sram2 */
+void* halloc(size_t n);
+
+/* Frees the memory allocated by halloc. */
+void hfree(void* mem);
+
+#ifdef FOR_TESTING
+
+void* debug_halloc_get_next_ptr(void* ptr);
+
+void* debug_halloc_get_prev_ptr(void* ptr);
+
+int debug_halloc_assert_consistency(char* error, size_t len);
+
+#endif
+
+
+#endif