u-boot.git/lib/tiny-printf.c, branch v2016.07

SPL: tiny-printf: avoid any BSS usage

2016-07-08T16:50:34+00:00

As printf calls may be executed quite early, we should avoid using any
BSS stored variables, since some boards put BSS in DRAM, which may not
have been initialised yet.
Explicitly mark those "static global" variables as belonging to the
.data section, to keep tiny-printf clear of any BSS usage.

Signed-off-by: Andre Przywara

tinyprintf: Add vprintf implementation

2016-06-20T20:43:58+00:00

vprintf is used by panic() which is used in various SPL paths on some
boards.

Signed-off-by: Hans de Goede 
Acked-by: Ian Campbell 
Reviewed-by: Simon Glass

tiny-printf: Correct the snprintf() implementation

2016-06-09T17:52:53+00:00

This current code passes the variable arguments list to sprintf(). This is
not correct. Fix it by calling _vprintf() directly.

This makes firefly-rk3288 boot again.

Fixes: abeb272 ("tiny-printf: Support snprintf()")
Reviewed-by: Stefan Roese 
Acked-by: Marek Vasut 
Signed-off-by: Simon Glass

tiny-printf: Support sprintf()

2016-06-03T01:21:42+00:00

Add a simple version of this function for SPL. It does not check the buffer
size as this would add to the code size.

Signed-off-by: Marek Vasut 
Cc: Simon Glass 
Cc: Stefan Roese 
Cc: Tom Rini 
Cc: lesne@alse-fr.com
Reviewed-by: Tom Rini 
Reviewed-by: Sylvain Lesne 
Tested-by: Sylvain Lesne

tiny-printf: Support snprintf()

2016-05-27T02:48:44+00:00

Add a simple version of this function for SPL. It does not check the buffer
size as this would add to the code size.

Signed-off-by: Simon Glass 
Reviewed-by: Stefan Roese

tiny-printf: Tidy up a few nits

2016-05-27T02:48:44+00:00

- Rename 'w' to 'width' to make it more obvious what it is used for
- Use bool and int types instead of char to avoid register-masking on
32-bit machines

Signed-off-by: Simon Glass 
Reviewed-by: Stefan Roese

tiny-printf: Always print zeroes

2016-01-21T02:06:22+00:00

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 
Reviewed-by: Stefan Roese 
Reviewed-by: Tom Rini

tiny-printf: Avoid printing NULL strings

2016-01-21T02:06:22+00:00

Add a check for NULL strings to avoid printing junk to the console.

Signed-off-by: Simon Glass 
Reviewed-by: Stefan Roese

lib/tiny-printf.c: Implement vprintf

2015-12-14T00:07:30+00:00

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

lib/tiny-printf.c: Support numbers bigger than 0xffff and misc updates

2015-11-23T15:56:08+00:00

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 
Cc: Simon Glass 
Cc: Hans de Goede 
Cc: Tom Rini 
Cc: Albert Aribaud