From: Tom Rini <trini@konsulko.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [U-Boot, 3/4, v3] lib/tiny-printf.c: Add tiny printf function for space limited environments
Date: Mon, 23 Nov 2015 17:44:59 -0500 [thread overview]
Message-ID: <20151123224459.GD9551@bill-the-cat> (raw)
In-Reply-To: <1448258422-24932-1-git-send-email-sr@denx.de>
On Mon, Nov 23, 2015 at 07:00:22AM +0100, Stefan Roese wrote:
> 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>
Applied to u-boot/master, thanks!
--
Tom
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next prev parent reply other threads:[~2015-11-23 22:44 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-16 14:26 [U-Boot] [PATCH 1/4 v2] common/console.c: Drop sandbox special-case console code Stefan Roese
2015-11-16 14:26 ` [U-Boot] [PATCH 2/4 v2] common/console.c: Small coding style cleanup Stefan Roese
2015-11-16 21:08 ` Simon Glass
2015-11-23 22:44 ` [U-Boot] [U-Boot, 2/4, " Tom Rini
2015-11-16 14:26 ` [U-Boot] [PATCH 3/4 v2] lib/tiny-printf.c: Add tiny printf function for space limited environments Stefan Roese
2015-11-21 3:27 ` Tom Rini
2015-11-23 5:50 ` Stefan Roese
2015-11-16 14:26 ` [U-Boot] [PATCH 4/4 v2] lib/tiny-printf.c: Support numbers bigger than 0xffff and misc updates Stefan Roese
2015-11-23 22:44 ` [U-Boot] [U-Boot, 4/4, " Tom Rini
2015-11-16 21:08 ` [U-Boot] [PATCH 1/4 v2] common/console.c: Drop sandbox special-case console code Simon Glass
2015-11-23 6:00 ` [U-Boot] [PATCH 3/4 v3] lib/tiny-printf.c: Add tiny printf function for space limited environments Stefan Roese
2015-11-23 22:44 ` Tom Rini [this message]
2015-11-23 22:44 ` [U-Boot] [U-Boot, 1/4, v2] common/console.c: Drop sandbox special-case console code Tom Rini
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