From: Sergiy Kibrik <sergiy.kib...@globallogic.com>
Committer: Sergiy Kibrik <sergiy.kib...@globallogic.com>
Branch: master
osv: add Xen console basic driver
Primitive driver that uses HYPERVISOR_console_io hypercall to provide early
console.
Signed-off-by: Sergiy Kibrik <sergiy.kib...@globallogic.com>
---
diff --git a/drivers/xenconsole.cc b/drivers/xenconsole.cc
--- a/drivers/xenconsole.cc
+++ b/drivers/xenconsole.cc
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2017 Sergiy Kibrik <sergiy.kib...@globallogic.com>
+ *
+ * This work is open source software, licensed under the terms of the
+ * BSD license as described in the LICENSE file in the top-level directory.
+ */
+
+#include <bsd/porting/netport.h> /* __dead2 defined here */
+#include <xen/hypervisor.h>
+
+#include "xenconsole.hh"
+
+namespace console {
+
+void XEN_Console::write(const char *str, size_t len) {
+ HYPERVISOR_console_write(str, len);
+}
+
+void XEN_Console::dev_start()
+{
+}
+
+void XEN_Console::flush()
+{
+}
+
+bool XEN_Console::input_ready()
+{
+ return false; /*TODO: support input */
+}
+
+char XEN_Console::readch() {
+ return '\0'; /*TODO: support input */
+}
+
+}
diff --git a/drivers/xenconsole.hh b/drivers/xenconsole.hh
--- a/drivers/xenconsole.hh
+++ b/drivers/xenconsole.hh
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2017 Sergiy Kibrik <sergiy.kib...@globallogic.com>
+ *
+ * This work is open source software, licensed under the terms of the
+ * BSD license as described in the LICENSE file in the top-level directory.
+ */
+
+#ifndef XEN_CONSOLE_HH
+#define XEN_CONSOLE_HH
+
+#include "console-driver.hh"
+#include "exceptions.hh"
+#include <osv/interrupt.hh>
+
+namespace console {
+
+class XEN_Console : public console_driver {
+public:
+ virtual void write(const char *str, size_t len);
+ virtual void flush();
+ virtual bool input_ready();
+ virtual char readch();
+
+private:
+ virtual void dev_start();
+ virtual const char *thread_name() { return "xen-input"; }
+};
+
+}
+
+#endif /* XEN_CONSOLE_HH */
--
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