1 files changed, 32 insertions, 0 deletions
diff --git a/include/semihosting.h b/include/semihosting.h
new file mode 100644
index 0000000..450848e
--- /dev/null
+++ b/include/semihosting.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __SEMIHOSTING_H
+#define __SEMIHOSTING_H
+
+#include <sys/types.h>
+
+/*
+ * semihosting file io, backed by the host when qemu runs with
+ * -semihosting. all calls return negative errno style errors so the
+ * boot flow can fall back to whatever the board has without semihosting.
+ */
+
+enum smh_open_mode {
+	MODE_READ	= 0x0,
+	MODE_BINARY	= 0x1,
+	MODE_PLUS	= 0x2,
+	MODE_WRITE	= 0x4,
+	MODE_APPEND	= 0x8,
+};
+
+long smh_open(const char *fname, enum smh_open_mode mode);
+long smh_read(long fd, void *memp, size_t len);
+long smh_write(long fd, const void *memp, size_t len, size_t *written);
+void smh_write0(const char *str);
+long smh_close(long fd);
+long smh_flen(long fd);
+long smh_seek(long fd, long pos);
+
+/* probe once, a boot without a debugger attached must not trap */
+bool smh_probe(void);
+
+#endif