dm: Add a panic_str() function to reduce code size

The printf() in panic() adds about 1.5KB of code size to SPL when compiled
with Thumb-2. Provide a smaller version that does not support printf()-style
arguments and use it in two commonly compiled places.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/include/vsprintf.h b/include/vsprintf.h
index 5624482d57..09c8abd951 100644
--- a/include/vsprintf.h
+++ b/include/vsprintf.h
@@ -39,10 +39,33 @@ int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
 unsigned long long simple_strtoull(const char *cp, char **endp,
 					unsigned int base);
 long simple_strtol(const char *cp, char **endp, unsigned int base);
+
+/**
+ * panic() - Print a message and reset/hang
+ *
+ * Prints a message on the console(s) and then resets. If CONFIG_PANIC_HANG is
+ * defined, then it will hang instead of reseting.
+ *
+ * @param fmt:	printf() format string for message, which should not include
+ *		\n, followed by arguments
+ */
 void panic(const char *fmt, ...)
 		__attribute__ ((format (__printf__, 1, 2), noreturn));
 
 /**
+ * panic_str() - Print a message and reset/hang
+ *
+ * Prints a message on the console(s) and then resets. If CONFIG_PANIC_HANG is
+ * defined, then it will hang instead of reseting.
+ *
+ * This function can be used instead of panic() when your board does not
+ * already use printf(), * to keep code size small.
+ *
+ * @param fmt:	string to display, which should not include \n
+ */
+void panic_str(const char *str) __attribute__ ((noreturn));
+
+/**
  * Format a string and place it in a buffer
  *
  * @param buf	The buffer to place the result into