u-boot.git/arch/mips, branch v2017.09

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

mips: spl: configure SYS_MALLOC_F_LEN independently for SPL and full U-Boot

2017-07-27T12:59:03+00:00

Some platforms have very limited SRAM to run SPL code, so there may
not be the same amount space for a malloc pool before relocation in
the SPL stage as the normal U-Boot stage.

Make SPL and (the full) U-Boot stage use independent SYS_MALLOC_F_LEN,
so the size of pre-relocation malloc pool can be configured memory
space independently.

Signed-off-by: Andy Yan 
Acked-by: Daniel Schwierzeck 
Acked-by: Philipp Tomsich 
Reviewed-by: Philipp Tomsich 
[fixed up commit-message:]
Signed-off-by: Philipp Tomsich

Merge git://git.denx.de/u-boot-mips

2017-07-26T15:29:20+00:00

Convert CONFIG_ENV_IS_IN_FLASH to Kconfig

2017-07-26T01:20:02+00:00

This converts the following to Kconfig:
   CONFIG_ENV_IS_IN_FLASH

Signed-off-by: Simon Glass

Convert CONFIG_ENV_IS_IN_MMC/NAND/UBI and NOWHERE to Kconfig

2017-07-26T01:08:01+00:00

This converts the following to Kconfig:
   CONFIG_ENV_IS_IN_MMC
   CONFIG_ENV_IS_IN_NAND
   CONFIG_ENV_IS_IN_UBI
   CONFIG_ENV_IS_NOWHERE

In fact this already exists for sunxi as a 'choice' config. However not
all the choices are available in Kconfig yet so we cannot use that. It
would lead to more than one option being set.

In addition, one purpose of this series is to allow the environment to be
stored in more than one place. So the existing choice is converted to a
normal config allowing each option to be set independently.

There are not many opportunities for Kconfig updates to reduce the size of
this patch. This was tested with

   ./tools/moveconfig.py -i CONFIG_ENV_IS_IN_MMC

And then manual updates.  This is because for CHAIN_OF_TRUST boards they
can only have ENV_IS_NOWHERE set, so we enforce that via Kconfig logic
now.

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

MIPS: bootm: Fix broken boot_env_legacy codepath

2017-07-25T18:44:00+00:00

This patch fixes 2 bugs introduced by the following commit

2bb5b63 MIPS: bootm: rework and fix broken bootm code

The CONFIG_IS_ENABLED macro prepends 'CONFIG_' Hence, remove CONFIG_
from CONFIG_MIPS_BOOT_ENV_LEGACY usage.

Also, 2bb5b63 reworks bootm so that linux_env_legacy runs before
linux_cmdline_legacy. However, linux_env_legacy depends on
linux_cmdline_legacy running first as linux_cmdline_init initialilzes
linux_argp which linux_env_legacy later depends on during its
initialization.

Reorder the code so that linux_cmdline_legacy runs before
linux_env_legacy.

Signed-off-by: Zubair Lutfullah Kakakhel

MIPS: Stop building position independent code

2017-07-25T18:44:00+00:00

U-Boot has up until now built with -fpic for the MIPS architecture,
producing position independent code which uses indirection through a
global offset table, making relocation fairly straightforward as it
simply involves patching up GOT entries.

Using -fpic does however have some downsides. The biggest of these is
that generated code is bloated in various ways. For example, function
calls are indirected through the GOT & the t9 register:

  8f998064   lw     t9,-32668(gp)
  0320f809   jalr   t9

Without -fpic the call is simply:

  0f803f01   jal    be00fc04 

This is more compact & faster (due to the lack of the load & the
dependency the jump has on its result). It is also easier to read &
debug because the disassembly shows what function is being called,
rather than just an offset from gp which would then have to be looked up
in the ELF to discover the target function.

Another disadvantage of -fpic is that each function begins with a
sequence to calculate the value of the gp register, for example:

  3c1c0004   lui    gp,0x4
  279c3384   addiu  gp,gp,13188
  0399e021   addu   gp,gp,t9

Without using -fpic this sequence no longer appears at the start of each
function, reducing code size considerably.

This patch switches U-Boot from building with -fpic to building with
-fno-pic, in order to gain the benefits described above. The cost of
this is an extra step during the build process to extract relocation
data from the ELF & write it into a new .rel section in a compact
format, plus the added complexity of dealing with multiple types of
relocation rather than the single type that applied to the GOT. The
benefit is smaller, cleaner, more debuggable code. The relocate_code()
function is reimplemented in C to handle the new relocation scheme,
which also makes it easier to read & debug.

Taking maltael_defconfig as an example the size of u-boot.bin built
using the Codescape MIPS 2016.05-06 toolchain (gcc 4.9.2, binutils
2.24.90) shrinks from 254KiB to 224KiB.

Signed-off-by: Paul Burton 
Cc: Daniel Schwierzeck 
Cc: u-boot@lists.denx.de
Reviewed-by: Daniel Schwierzeck 
Tested-by: Daniel Schwierzeck

mips: Make u-boot-mips.h a private header

2017-06-05T15:02:33+00:00

Rather than including this arch-specific header file in common.h, include
it from within mips's u-boot.h header.

Signed-off-by: Simon Glass 
Reviewed-by: Daniel Schwierzeck

mips: bmips: fix BCM3380 periph clock frequency

2017-05-31T13:45:29+00:00

Instead of having a peripheral clock of 50 MHz like the BCM63xx family, it
has a 48 MHz clock.
This fixes uart baud rate calculation for BCM3380.

Signed-off-by: Álvaro Fernández Rojas