lib/tiny-printf.c: Add tiny printf function for space limited environments
This patch adds a small printf() version that supports all basic formats.
Its intented to be used in U-Boot SPL versions on platforms with very
limited internal RAM sizes.
To enable it, just define CONFIG_USE_TINY_PRINTF in your defconfig. This
will result in the SPL using this tiny function and the main U-Boot
still using the full-blown printf() function.
This code was copied from:
http://www.sparetimelabs.com/printfrevisited
With mostly only coding style related changes so that its checkpatch
clean.
The size reduction is about 2.5KiB. Here a comparison for the db-mv784mp-gp
(Marvell AXP) SPL:
Without this patch:
58963 18536 1928 79427 13643 ./spl/u-boot-spl
With this patch:
56542 18536 1956 77034 12cea ./spl/u-boot-spl
Note:
To make it possible to compile tiny-printf.c instead of vsprintf.c when
CONFIG_USE_TINY_PRINTF is defined, the functions printf() and vprintf() are
moved from common/console.c into vsprintf.c in this patch.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
diff --git a/examples/api/libgenwrap.c b/examples/api/libgenwrap.c
index c1afa5b..ba51007 100644
--- a/examples/api/libgenwrap.c
+++ b/examples/api/libgenwrap.c
@@ -16,48 +16,16 @@
#include "glue.h"
-/*
- * printf() and vprintf() are stolen from u-boot/common/console.c
- */
-int printf (const char *fmt, ...)
-{
- va_list args;
- uint i;
- char printbuffer[256];
-
- va_start (args, fmt);
-
- /* For this to work, printbuffer must be larger than
- * anything we ever want to print.
- */
- i = vsprintf (printbuffer, fmt, args);
- va_end (args);
-
- /* Print the string */
- ub_puts (printbuffer);
- return i;
-}
-
-int vprintf (const char *fmt, va_list args)
-{
- uint i;
- char printbuffer[256];
-
- /* For this to work, printbuffer must be larger than
- * anything we ever want to print.
- */
- i = vsprintf (printbuffer, fmt, args);
-
- /* Print the string */
- ub_puts (printbuffer);
- return i;
-}
-
-void putc (const char c)
+void putc(const char c)
{
ub_putc(c);
}
+void puts(const char *s)
+{
+ ub_puts(s);
+}
+
void __udelay(unsigned long usec)
{
ub_udelay(usec);