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authorStefan Roese <sr@denx.de>2015-11-23 07:00:22 +0100
committerTom Rini <trini@konsulko.com>2015-11-23 10:56:07 -0500
commit7d9cde1031040a4931d6e12da7d9767b7e1d85d4 (patch)
tree902ccb2b9d0212a5f1b4a98eee1dd4b7b4f34d98 /examples/api
parentddf7355a73f2e01bd8eec4b939d8749ac22ff574 (diff)
downloadtalos-obmc-uboot-7d9cde1031040a4931d6e12da7d9767b7e1d85d4.tar.gz
talos-obmc-uboot-7d9cde1031040a4931d6e12da7d9767b7e1d85d4.zip
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>
Diffstat (limited to 'examples/api')
-rw-r--r--examples/api/libgenwrap.c40
1 files changed, 4 insertions, 36 deletions
diff --git a/examples/api/libgenwrap.c b/examples/api/libgenwrap.c
index c1afa5bc09..ba51007b14 100644
--- a/examples/api/libgenwrap.c
+++ b/examples/api/libgenwrap.c
@@ -16,46 +16,14 @@
#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)
+void putc(const char c)
{
- 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;
+ ub_putc(c);
}
-void putc (const char c)
+void puts(const char *s)
{
- ub_putc(c);
+ ub_puts(s);
}
void __udelay(unsigned long usec)
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