u-boot.git/lib/tiny-printf.c, branch v2016.09

tiny-printf: Adjust to avoid using data section

2016-08-08T17:32:59+00:00

We can pass all the variables down to the functions that need them, and
then everything is on the stack. This is safer than using the data section.

At least on firefly-rk3288, the code size is the same and the data size is
12 bytes smaller:

before:
  18865	   2636	     40	  21541	   5425	b/firefly-rk3288/spl/u-boot-spl
after:
  18865	   2624	     40	  21529	   5419	b/firefly-rk3288/spl/u-boot-spl

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

tiny-printf: Support assert()

2016-07-15T02:40:24+00:00

At present assert() is not supported with tiny-printf, so when DEBUG is
enabled a build error is generated for each assert().

Add an __assert_fail() function to correct this. It prints a message and
then hangs.

Signed-off-by: Simon Glass

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