arch: include <asm-generic/int-ll64.h> from <asm/types.h> ...

Many architectures duplicate the same fixed type definitions
as in <asm-generic/int-ll64.h>.

Include <asm-generic/int-ll64.h> from <asm/types.h>, and remove
the duplicated code.

Note:
Linux commit 0c79a8e29b5f ("asm/types.h: Remove
include/asm-generic/int-l64.h") unified the kernel space
definition into int-ll64.h. Barebox also adopts int-ll64.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

kbuild: prefix compiler flag variables with KBUILD_ ...

In old days, Linux also used to use well-known variables such CFLAGS,
CPPFLAGS, etc.

They were prefixed with KBUILD_ presumably for preventing users from
overriding them accidentally.

Rename as follows:
  CFLAGS          ->  KBUILD_CFLAGS
  AFLAGS          ->  KBUILD_AFLAGS
  CPPFLAGS        ->  KBUILD_CPPFLAGS
  LDFLAGS         ->  KBUILD_LDFLAGS
  HOSTCFLAGS      ->  KBUILD_HOSTCFLAGS
  HOSTCXXFLAGS    ->  KBUILD_HOSTCXXFLAGS
  HOSTLDFLAGS     ->  KBUILD_HOSTLDFLAGS
  HOST_LOADLIBES  ->  KBUILD_HOSTLDLIBS

HOSTCFLAGS, HOSTCXXFLAGS, HOSTLDFLAGS, HOSTLDLIBS are re-used to allow
users to pass-in additional flags to the host compiler.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: remove references to CREDITS ...

The CREDITS file was removed from barebox in 2015 by commit 6570288f2d97
("Remove the CREDITS file"). Remove references to it from several files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

lds: Add and use RO_DATA_SECTION macro ...

We have many different pointer arrays which we put into linker sections
and each time there's one added we have to adjust all linker scripts.
This adds a common RO_DATA_SECTION define and uses it for all
architectures. This makes it easier to add a new linker array.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

lds: Move start/end address variables into defines ...

For the older section defines we specify the start and end addresses
outside the macro which means we have to repeat them in each linker
script. Make the start/end addresses part of the define to simplify
things. While at it, add a BAREBOX_ prefix to the INITCALLS and EXITCALLS
macros for consistency to the other defines.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>

barebox.lds: Remove unnecessary braces ...

The BAREBOX_CLK_TABLE and BAREBOX_DTB macros are defines that do not
take a parameter, so we can remove the braces.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Kconfig: retire empty <asm/barebox.h> ...

With the latest changes, this file is empty on all archs. Drop it.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch: add KBUILD_DEFCONFIG to allow "make defconfig" ...

Currently, "make defconfig" is only supported for sandbox and x86.

I set KBUILD_DEFCONFIG to support "make defconfig" where I was able
to find a suitable one.

nios2 and openrisc have a single generic_defconfig, so it is definitely
good for KBUILD_DEFCONFIG.

For arm, mips, I assume qemu is a preferred choice over a real board.

blackfin has only one defconfig. Since it is inactive (it is gone in
Linux), so no more defconfig will come in.

I am not sure about ppc and riscv, so I did not touch them.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

move umode_t typedef from asm/types.h to linux/types.h ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

kconfig: include common Kconfig files from top-level Kconfig ...

Based on this linux kernel commit:

> commit 1572497
> Author: Christoph Hellwig <hch@lst.de>
> Date:   Tue Jul 31 13:39:30 2018 +0200
>
>     kconfig: include common Kconfig files from top-level Kconfig

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: remove function prototypes from the past ...

Several functions do not exist anymore for a long time now. Remove their
prototypes.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ratp: implement generic command support ...

The RATP implementation now allows executing generic commands with a
binary interface: binary requests are received and binary responses
are returned.

Each command can define its own RATP request contents (e.g. to specify
command-specific options) as well as its own RATP response contents
(if any data is to be returned).

Each command is associated with a pair of numeric unique request and
response IDs, and for easy reference these IDs are maintained in the
common ratp_bb header. Modules may override generic implemented
commands or include their own new ones (as long as the numeric IDs
introduced are unique).

Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

openrisc: fix call to restart_handler_register_fn ...

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/defenv'

Make generic default environment type a use choice ...

So far it was hardcoded for each board if defenv-1 or defenv-2 is used.
Make this a user choice so that a particular board no longer enforces
a defenv type.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of_unflatten_dtb(): Check return value with IS_ERR ...

Of_unflatten_dtb returns a ERR_PTR value so checking it against NULL is
incorrect. Fix it in all of the places where this was happening.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

rework remap_range ...

remap_range is for remapping regions with different cache attributes.
It is implemented for ARM and PowerPC only, the other architectures only
provide stubs.
Currently the new cache attributes are passed in an architecture specific
way and the attributes have to be retrieved by calls to
mmu_get_pte_cached_flags() and mmu_get_pte_uncached_flags().
Make this simpler by providing architecture independent flags which can
be directly passed to remap_range()
Also provide a MAP_ARCH_DEFAULT flag and a arch_can_remap() function.
The MAP_ARCH_DEFAULT defaults to whatever caching type the architecture
has as default. the arch_can_remap() function returns true if the
architecture can change the cache attributes, false otherwise. This
allows the memtest code to better find out what it has to do.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

restart: replace reset_cpu with registered restart handlers ...

This replaces the reset_cpu() function which every SoC or board must
provide with registered handlers. This makes it possible to have multiple
reset functions for boards which have multiple ways to reset the machine.
Also boards which have no way at all to reset the machine no longer
have to provide a dummy reset_cpu() function.

The problem this solves is that some machines have external PMICs or
similar to reset the system which have to be preferred over the
internal SoC reset, because the PMIC can reset not only the SoC but also
the external devices.

To pick the right way to reset a machine each handler has a priority. The
default priority is 100 and all currently existing restart handlers are
registered with this priority. of_get_restart_priority() allows to retrieve
the priority from the device tree which makes it possible for boards to
give certain restart handlers a higher priority in order to use this one
instead of the default one.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

exitcall: move arch_shutdown to exitcall infrastructure ...

Signed-off-by: Herve Codina <Herve.CODINA@celad.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

exitcall: Add exitcall infrastructure ...

exitcall infrastructure is based on initcall infrastructure.
It allows to have and use exit call hooks on barebox shutdown.

Signed-off-by: Herve Codina <Herve.CODINA@celad.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

openrisc: use generic posix_types.h ...

Use generic asm-generic/posix_types.h instead of repeating the
typedefs.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

introduce bitsperlong.h for remaining architectures ...

This introduces the bitsperlong.h file for the remaining architectures.
It's purpose is to define BITS_PER_LONG which in the next step can be used
by a generic posix_types.h file.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

dma: Use generic place for dma_addr_t typedef ...

Instead of letting all architectures define their own dma_addr_t use
a common place in include/linux/types.h and use a Kconfig symbol that
architectures can select to define the width of dma_addr_t. The same
is done in the Kernel.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

openrisc: barebox.lds.S: fix BFD format names ...

Here is Franck Jullien's comment (see
http://lists.infradead.org/pipermail/barebox/2015-February/022259.html):

  > Until now, the official openrisc toolchain was called or32.
  > However, the new one (and maintained one)  is called or1k. So we need
  > to change "elf32-or32" to "elf32-or1k" in barebox.lds.S.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

kbuild: move asm-offsets.h rule to ./Kbuild ...

Currently, MIPS is the only architecture that needs
include/generated/asm-offsets.h, but we have got ./Kbuild file now.

It is a good reason to move asm-offsets.h rule from arch/mips/Makefile
to ./Kbuild and add dummy asm-offsets.c for the other architectures.
asm-offsets.h would be useful for all the architectures.

This commit does not implement include/generated/bounds.h,
but if necessary, it is easy to implement it.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: Reuse init_clock() return value for clocksource drivers ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

openrisc: generic_defconfig: enable device tree stuff ...

Also enable iomem and miitool.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

openrisc: generic board: reduce platform code ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

openrisc: dts: import or1ksim.dts from linux-3.16 ...

There are some minor changes with original linux-3.16 file:

  * the 'model' attribute is added (it used for barebox banner board name);
  * all "opencores,*-rtlsvn*" 'compatible' attribute values are dropped;
    these values are not actually used in the device drivers.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Cc: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>