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-rw-r--r--arch/tile/kernel/early_printk.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/arch/tile/kernel/early_printk.c b/arch/tile/kernel/early_printk.c
new file mode 100644
index 000000000..aefb2c086
--- /dev/null
+++ b/arch/tile/kernel/early_printk.c
@@ -0,0 +1,75 @@
+/*
+ * 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.
+ */
+
+#include <linux/console.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/irqflags.h>
+#include <linux/printk.h>
+#include <asm/setup.h>
+#include <hv/hypervisor.h>
+
+static void early_hv_write(struct console *con, const char *s, unsigned n)
+{
+ tile_console_write(s, n);
+
+ /*
+ * Convert NL to NLCR (close enough to CRNL) during early boot.
+ * We assume newlines are at the ends of strings, which turns out
+ * to be good enough for early boot console output.
+ */
+ if (n && s[n-1] == '\n')
+ tile_console_write("\r", 1);
+}
+
+static struct console early_hv_console = {
+ .name = "earlyhv",
+ .write = early_hv_write,
+ .flags = CON_PRINTBUFFER | CON_BOOT,
+ .index = -1,
+};
+
+void early_panic(const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+
+ arch_local_irq_disable_all();
+
+ va_start(args, fmt);
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ early_printk("Kernel panic - not syncing: %pV", &vaf);
+
+ va_end(args);
+
+ dump_stack();
+ hv_halt();
+}
+
+static int __init setup_early_printk(char *str)
+{
+ if (early_console)
+ return 1;
+
+ early_console = &early_hv_console;
+ register_console(early_console);
+
+ return 0;
+}
+
+early_param("earlyprintk", setup_early_printk);