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path: root/drivers/tty/hvc/hvc_tile.c
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Diffstat (limited to 'drivers/tty/hvc/hvc_tile.c')
-rw-r--r--drivers/tty/hvc/hvc_tile.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/tty/hvc/hvc_tile.c b/drivers/tty/hvc/hvc_tile.c
new file mode 100644
index 00000000000..7a84a059547
--- /dev/null
+++ b/drivers/tty/hvc/hvc_tile.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ *
+ * Tilera TILE Processor hypervisor console
+ */
+
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+
+#include <hv/hypervisor.h>
+
+#include "hvc_console.h"
+
+static int hvc_tile_put_chars(uint32_t vt, const char *buf, int count)
+{
+ return hv_console_write((HV_VirtAddr)buf, count);
+}
+
+static int hvc_tile_get_chars(uint32_t vt, char *buf, int count)
+{
+ int i, c;
+
+ for (i = 0; i < count; ++i) {
+ c = hv_console_read_if_ready();
+ if (c < 0)
+ break;
+ buf[i] = c;
+ }
+
+ return i;
+}
+
+static const struct hv_ops hvc_tile_get_put_ops = {
+ .get_chars = hvc_tile_get_chars,
+ .put_chars = hvc_tile_put_chars,
+};
+
+static int __init hvc_tile_console_init(void)
+{
+ extern void disable_early_printk(void);
+ hvc_instantiate(0, 0, &hvc_tile_get_put_ops);
+ add_preferred_console("hvc", 0, NULL);
+ disable_early_printk();
+ return 0;
+}
+console_initcall(hvc_tile_console_init);
+
+static int __init hvc_tile_init(void)
+{
+ struct hvc_struct *s;
+ s = hvc_alloc(0, 0, &hvc_tile_get_put_ops, 128);
+ return IS_ERR(s) ? PTR_ERR(s) : 0;
+}
+device_initcall(hvc_tile_init);