1 files changed, 31 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hvconsole.h b/arch/powerpc/include/asm/hvconsole.h
new file mode 100644
index 000000000..ccb203450
--- /dev/null
+++ b/arch/powerpc/include/asm/hvconsole.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * hvconsole.h
+ * Copyright (C) 2004 Ryan S Arnold, IBM Corporation
+ *
+ * LPAR console support.
+ */
+
+#ifndef _PPC64_HVCONSOLE_H
+#define _PPC64_HVCONSOLE_H
+#ifdef __KERNEL__
+
+/*
+ * PSeries firmware will only send/recv up to 16 bytes of character data per
+ * hcall.
+ */
+#define MAX_VIO_PUT_CHARS	16
+#define SIZE_VIO_GET_CHARS	16
+
+/*
+ * Vio firmware always attempts to fetch MAX_VIO_GET_CHARS chars.  The 'count'
+ * parm is included to conform to put_chars() function pointer template
+ */
+extern int hvc_get_chars(uint32_t vtermno, char *buf, int count);
+extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count);
+
+/* Provided by HVC VIO */
+void hvc_vio_init_early(void);
+
+#endif /* __KERNEL__ */
+#endif /* _PPC64_HVCONSOLE_H */