u-boot.git/arch/sh, branch v2018.09

SPDX: Convert all of our single license tags to Linux Kernel style

2018-05-07T13:34:12+00:00

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini

sh: Do not provide strncmp

2018-02-22T23:06:05+00:00

With modern GCC, we get warnings such as:
cmd/jffs2.c: In function 'mtdparts_init':
arch/sh/include/asm/string.h:110:38:
warning: array subscript is above array bounds [-Warray-bounds]
   : "0" (__cs), "1" (__ct), "r" (__cs+__n)
                                  ~~~~^~~~

This results in a small size reduction as well.

Cc: Nobuhiro Iwamatsu 
Signed-off-by: Tom Rini

sh: Use -m2a-nofpu only

2018-02-21T22:42:47+00:00

Based on reading over the GCC manual, passing both -m2a and -m2a-nofpu
are redundant, as -m2a-nofpu will provide functional code for both.  As
-m2a-nofpu functions with more toolchains and does what is expected,
switch.

Cc: Nobuhiro Iwamatsu 
Signed-off-by: Tom Rini

sh: Use asm-generic/io.h

2017-10-03T01:52:21+00:00

Convert the sh architecture to make use of the new asm-generic/io.h to
provide address mapping functions. As the generic implementations are
suitable for sh this is primarily a matter of moving code.

Feedback from architecture maintainers is welcome.

Signed-off-by: Paul Burton 
Cc: Nobuhiro Iwamatsu

sh: Fix linking of ms7722se

2017-08-27T15:50:16+00:00

While it is true that we no longer have 'ppcenv' and similar sections,
including env/embedded.o at all results in the text/etc sections being
available for the rest of the link.  This in turn is required for the
setup used on ms7722se.  This also, likely, needs further fine-tuning.

Fixes: f40ad66fa066 ("arch/sh: don't bring common/env_embedded.o into the link")
Signed-off-by: Tom Rini

arch/sh: don't bring common/env_embedded.o into the link

2017-08-25T22:40:36+00:00

The linker script for SuperH brings the .ppcenv and .ppcenvr section
of common/env_embedded.o into the .text section. However, the .ppcenv
section is only ever filled in by env_embedded.o when
CONFIG_SYS_USE_PPCENV is defined, but no platforms in mainline U-Boot
use this.

In addition, common/env_embedded.o is not always built (when you use
CONFIG_ENV_IS_NOWHERE for example), which causes the following build
failure:

Fixes:

  LD      u-boot
/home/thomas/sh4aeb-linux-musl/bin/sh4aeb-linux-ld.bfd: cannot find common/env_embedded.o

We fix this by no longer adding the .ppcenv and .ppcenvr sections from
common/env_embedded.o into the .text section.

Signed-off-by: Thomas Petazzoni 
Signed-off-by: Nobuhiro Iwamatsu

arch/sh: allow building in big-endian mode

2017-08-25T22:38:39+00:00

The SuperH architecture allows to be run in either little or big
endian mode. Some SuperH SoCs get the little vs. big endian decision
through mode pins sampled at reset, so if big endian has been choosen
by HW designers, it cannot be easily changed.

Therefore, it makes sense to allow building U-Boot for SuperH in big
endian mode. To allow this, the only change needed is to adjust the
OUTPUT_FORMAT() in the linker script.

Signed-off-by: Thomas Petazzoni

env: Rename getenv/_f() to env_get()

2017-08-16T12:30:24+00:00

We are now using an env_ prefix for environment functions. Rename these
two functions for consistency. Also add function comments in common.h.

Quite a few places use getenv() in a condition context, provoking a
warning from checkpatch. These are fixed up in this patch also.

Suggested-by: Wolfgang Denk 
Signed-off-by: Simon Glass

env: Convert CONFIG_ENV_IS_IN... to a choice

2017-08-16T00:50:01+00:00

At present we support multiple environment drivers but there is not way to
select between them at run time. Also settings related to the position and
size of the environment area are global (i.e. apply to all locations).

Until these limitations are removed we cannot really support more than one
environment location. Adjust the location to be a choice so that only one
can be selected. By default the environment is 'nowhere', meaning that the
environment exists only in memory and cannot be saved.

Also expand the help for the 'nowhere' option and move it to the top since
it is the default.

Signed-off-by: Simon Glass 
[trini: Move all of the imply logic to default X if Y so it works again]
Signed-off-by: Tom Rini

Move environment files from common/ to env/

2017-08-15T12:18:45+00:00

About a quarter of the files in common/ relate to the environment. It
seems better to put these into their own subdirectory and remove the
prefix.

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