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At present this does not print zero values in numeric format (hex and
decimal). Add a special case for this.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Stefan Roese <[email protected]>
Reviewed-by: Tom Rini <[email protected]>
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Add a check for NULL strings to avoid printing junk to the console.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Stefan Roese <[email protected]>
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Implement both printf and vprintf for a bit more flexibility, e.g.
allows the panic() function to work with tiny-printf.
Signed-off-by: Sjoerd Simons <[email protected]>
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With this patch now, the tiny printf() function also supports numbers
bigger than 0xffff. Additionally the code is simplified a bit and
some static variables are moved to function parameters. Also the
upper case hex variable output support is removed, as its not really
needed in this simple printf version. And removing it reduces the
complexity and the code size again a bit.
Here the new numbers, again on the db-mv784mp-gp (Armada XP):
Without this patch:
56542 18536 1956 77034 12cea ./spl/u-boot-spl
With this patch:
56446 18536 1936 76918 12c76 ./spl/u-boot-spl
Signed-off-by: Stefan Roese <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Hans de Goede <[email protected]>
Cc: Tom Rini <[email protected]>
Cc: Albert Aribaud <[email protected]>
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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 <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Hans de Goede <[email protected]>
Cc: Tom Rini <[email protected]>
Cc: Albert Aribaud <[email protected]>
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