Initial revision
diff --git a/include/syscall.h b/include/syscall.h
new file mode 100644
index 0000000..f80d550
--- /dev/null
+++ b/include/syscall.h
@@ -0,0 +1,37 @@
+#ifndef __MON_SYS_CALL_H__
+#define __MON_SYS_CALL_H__
+
+#ifndef __ASSEMBLY__
+
+#include <common.h>
+
+/* These are declarations of system calls available in C code */
+int mon_getc(void);
+int mon_tstc(void);
+void mon_putc(const char);
+void mon_puts(const char*);
+void mon_printf(const char* fmt, ...);
+void mon_install_hdlr(int, interrupt_handler_t*, void*);
+void mon_free_hdlr(int);
+void *mon_malloc(size_t);
+void mon_free(void*);
+
+#endif /* ifndef __ASSEMBLY__ */
+
+#define NR_SYSCALLS 9 /* number of syscalls */
+
+/*
+ * Make sure these functions are in the same order as they
+ * appear in the "examples/syscall.S" file !!!
+ */
+#define SYSCALL_GETC 0
+#define SYSCALL_TSTC 1
+#define SYSCALL_PUTC 2
+#define SYSCALL_PUTS 3
+#define SYSCALL_PRINTF 4
+#define SYSCALL_INSTALL_HDLR 5
+#define SYSCALL_FREE_HDLR 6
+#define SYSCALL_MALLOC 7
+#define SYSCALL_FREE 8
+
+#endif