mambo: add mprintf()

mprintf() is printf(), but it goes straight to the mambo console. This
allows it to be independent of Skiboot's actual console infrastructure
so it can be used for debugging the console drivers and for debugging
code that runs before the console is setup.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/platforms/mambo/console.c b/platforms/mambo/console.c
index c7d7ab0..d02cde9 100644
--- a/platforms/mambo/console.c
+++ b/platforms/mambo/console.c
@@ -66,3 +66,22 @@ void enable_mambo_console(void)
 	prlog(PR_NOTICE, "Enabling Mambo console\n");
 	set_console(&mambo_con_driver);
 }
+
+/*
+ * mambo console based printf(), this is useful for debugging the console
+ * since mambo_console_write() can be safely called from anywhere.
+ *
+ * This is a debug hack and you shouldn't use it in real code.
+ */
+void mprintf(const char *fmt, ...)
+{
+	char buf[320];
+	va_list args;
+	int i;
+
+	va_start(args, fmt);
+	i = vsnprintf(buf, sizeof(buf), fmt, args);
+	va_end(args);
+
+	mambo_console_write(buf, i);
+}