startup: Fix do_autoboot_countdown() running multiple times ...

The comment above do_autoboot_countdown() states: "This function can be
called multiple times, it is executed only the first time.". Since
1973892533 ("startup: don't clobber original autoboot state") This is no
longer the case. Bring back the old and documented behaviour.

Fixes: 1973892533 ("startup: don't clobber original autoboot state")
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common.h: move the generic IOMEM definition to asm-generic/io.h ...

arch/mips/include/asm/io.h defines arch-specific IOMEM().

The generic definition of IOMEM() should go to asm-generic/io.h
because it is a collection of fallback defaults when there is no
specific definition in <asm/io.h>.

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

common.h: move and rename lregion_overlap() ...

lregion_overlap() is only used by common/startup.c

There is no need to define it in include/common.h

While I was here, I also renamed it to region_overlap(), and got rid
of the 'inline' keyword.

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

common.h: remove unused region_overlap() ...

This is not used at all.

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>

startup: rename AUTOBOOT_UNKNOWN to more descriptive AUTOBOOT_COUNTDOWN ...

If we export the autoboot state variable for customization, having
unknown as default is not so helpful. Rename it to what actually happens
(abortable countdown).

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

include: add SPDX GPL-2.0-or-later license tags where applicable ...

Signed-off-by: Roland Hieber <rohieb@rohieb.name>
Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common: provide stubs for ctrlc_* functions ...

Currently the stubs are only provided for CONFIG_CONSOLE_SIMPLE, but
they are also needed for CONSOLE_NONE. Move them to the header.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
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>

Kconfig: create Kconfig symbol for ARCH_HAS_STACK_DUMP ...

Other arch-specific features are exposed in Kconfig too, so do here
likewise.

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

Merge branch 'for-next/misc'

lib: Add missing arguments to memcpy_parse_options() ...

Memcpy use-case differs from that of memcmp in default access type and
destination file mode. This was missed in original commit that
introduced memcpy_parse_options(). Add said parameters to
memcpy_parse_options(), so the can be correctly specified depending on
the use-case.

Fixes: ddf4cca339 ("commands: Introduce memcpy_parse_options()")
Reported-by: Peter Mamonov <pmamonov@gmail.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

startup: Factor out the autoboot counter to separate function ...

The autoboot countdown is part of the init function. This patch factors
out this code to a separate function to allow boards to call it at a
different time. Also boards can set the autoboot state manually in case
they have its own idea how to interrupt the autoboot process.

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

commands: Introduce memcpy_parse_options() ...

Both memcpy and memcmp have identical options, so in order to share
code between them, introduce memcpy_parse_options() and change both
tools to use it.

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

Shell: Handle aborting loops better ...

It's easy to get stuck in an infinite loop in the hush shell:

while true; do sleep 1; done

The 'sleep' command will check for ctrl-c with the ctrlc() function. This
will abort the sleep command. Hush then checks for ctrl-c again in the
loop. The ctrl-c in the buffer has already been eaten by the sleep
command, so the loop will continue.

With this patch we remember the presence of a ctrl-c character in a
variable instead of checking for a new character each time. The
variable must be resetted explicitly by calling ctrlc_handled() which
will be called by the shell in the outer loop.

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

memory_display: move prototype to include/printk.h ...

It's where the kernel has the print_hex_dump prototypes aswell, it's a
better match for these.

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

environment: Do not use environment when overlapping with other partitions ...

Environment partitions are usually specified with their hardcoded offset
and size, either in the device tree or the board file. These partitions
potentially overlap with other partitions read from the partition table.
Overlapping partitions for sure have bad effects. Be more friendly to our
users and warn them when such a situation occurs and stop using that
partition for storing the environment.

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

include/common: Make use of ALIGN and ALIGN_DOWN ...

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

include/common.h: move IOMEM declaration for MIPS to arch/mips/include/asm/io.h ...

Signed-off-by: Peter Mamonov <pmamonov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: base: use root_node compatible as suggestion for a hostname ...

on some SoCs we can use generic PLL and RAM initialization. In this
cases we create board file only to provide a host name.
With this patch host name will be created from device tree compatible.
For example:
 compatible = "board_vendor,board", "chip_vendor,soc"
the host name will be:
 "board"

This function will not overwrite a host name which is already set by
board or machine code.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

linux/kernel.h: move ALIGN_DOWN() to include/linux/kernel.h ...

Linux commit ed067d4a859f ("linux/kernel.h: Add ALIGN_DOWN macro")
moved ALIGN_DOWN to include/linux/kernel.h.

Let's do likewise.

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

poweroff: Allow to register poweroff handlers ...

Allow to register handlers for poweroff. This allows to have multiple
poweroff implementations in a single binary. The implementation is close
to the restart handlers.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

libfile: move open_and_lseek() to libfile ...

libfile is a collection of helpers for handling files. open_and_lseek()
is a perfect match for this, so move it there.

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

include: move crc specific stuff to crc.h ...

We have a crc.h, so move our crc function prototypes there to further
cleanup common.h.

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

include: move shell prototypes to shell.h ...

We have a shell,h, so move shell specific prototypes there.

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

include/common.h: remove unused struct memarea_info ...

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

include: move run_command prototype to command.h ...

run_command fits much better into command.h, move it there.

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

ARM: Remove do_execute and thumb2_execute ...

In commit 104a6a7 support was added
for Thumb2.  It added do_execute() as a way to provide arch dependent
calling veneers for use in "go" and thumb2_execute() as the thumb2 to
arm veneer.

But thumb2_execute() isn't necessary as gcc generates a proper calling
sequence from a standard function pointer call.  Thumb2 barebox is
compiled with the AAPCS ABI which requires this.

It also had a bug and didn't pass the arguments properly, but code
execute via "go" rarely uses arguments so this wasn't very noticeable.

Since thumb2 was always the only user of do_execute(), go ahead and
delete that too.

Signed-off-by: Trent Piepho <tpiepho@kymetacorp.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clock: remove duplicate xdelay declarations ...

ndelay is declared in include/clock.h, udelay in include/common.h and
mdelay in include/common.h and include/clock.h. Move them all to
include/clock.h and remove duplicates.

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>