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-rw-r--r--device/cons.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/device/cons.h b/device/cons.h
index 8ac796c..34f3bc5 100644
--- a/device/cons.h
+++ b/device/cons.h
@@ -54,4 +54,15 @@ extern int cngetc(void);
extern int cnmaygetc(void);
extern void cnputc(char);
+
+/*
+ * ROM getc/putc primitives.
+ * On some architectures, the boot ROM provides basic character input/output
+ * routines that can be used before devices are configured or virtual memory
+ * is enabled. This can be useful to debug (or catch panics from) code early
+ * in the bootstrap procedure.
+ */
+extern int (*romgetc)(char c);
+extern void (*romputc)(char c);
+
#endif /* _DEVICE_CONS_H */