asm-generic: partially sync io.h with linux kernel ...

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

Revert "globalvar: make globalvar functions more consistent" ...

This reverts commit 1b4a05c.

PPC: request a consistent memory layout ...

Using the memory test command will crash barebox, because it tests the
area where the stack is located for the PPC architecture.

On PPC the stack is below the barebox binary. Below the stack the malloc
area is located. Until this change some routines used the macros
from 'memory_layout.h', some other calculated their values by their
own - which resulted into an unrequested and unprotected stack area.

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

globalvar: make globalvar functions more consistent ...

Similar to the device parameter functions also make the globalvar
functions more consistent. This also adds support for readonly
globalvars and changes several existing globalvars which should
really be readonly to readonly.

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

arch: refresh defconfigs ...

The defconfig files are long untouched and a
make xy_defconfig; make savedefconfig usually generates quite
a different looking file. Refresh them to make it easier to generate
patches against the configs using
make xy_defconfig; make menuconfig; make savedefconfig

This has been done with the following script.

for a in arch/*; do
	arch=$(basename $a)
	for c in $a/configs/*; do
		config=$(basename $c)

	export ARCH=$arch
	make $config && make savedefconfig && mv defconfig $c
	done
done

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

Merge branch 'for-next/defenv'

defaultenv: add defaultenv-1 in boards via defaultenv_append_directory() ...

Currently it's hardcoded for each board which defaultenv version is
used. This is unfortunate since some people like the other defaultenv
version better and may want to select it.

This patch removes the board specific environment path
CONFIG_DEFAULT_ENVIRONMENT_PATH and instead adds it via:

	if (IS_ENABLED(CONFIG_DEFAULT_ENVIRONMENT_GENERIC))
		defaultenv_append_directory(defaultenv_<board>);

This way we can make sure that the defaultenv-1 board specific bits are
only compiled in when defaultenv-1 is actually in use.

The next step is to make the defaultenv version selection a user visible
choice.

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

defaultenv-2: remove unused *-menu-add-entry calls ...

The *-menu-add-entry functions no longer exist in defaultenv-2, so
remove the calls to these functions.

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

include: Move bulk of boot.h to bootm.h ...

The majority of the stuff currently in include/boot.h is about bootm
code implemented common/bootm.c. To be more consistent move it to a
new file include/bootm.h.

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

ppc: fix USPRG0 define ...

The #define USPRG0 aliases SPRN_USPRG, but it should refer to
SPRN_USPRG0. There is no register SPRN_USPRG on PowerPC.

Signed-off-by: Jason Tang <tang@jtang.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/bootm'

PPC/MPC5200: enable a useful command by default ...

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

PPC/MPC5XXX/reginfo: fix a bunch of compiler warnings ...

This change fixes a bunch of compiler warnings of this type:

arch/ppc/mach-mpc5xxx/reginfo.c: In function 'reginfo':
arch/ppc/mach-mpc5xxx/reginfo.c:14:3: warning: format '%X' expects argument of type 'unsigned int', but argument 2 has type 'ulong' [-Wformat=]
   (*(volatile ulong*)MPC5XXX_ADDECR & 0x00010000) ? 1 : 0);
   ^

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

PPC: clean compiler warning ...

This change fixes the following compiler warning:

arch/ppc/mach-mpc5xxx/cpu.c: In function 'restart_register_feature':
arch/ppc/mach-mpc5xxx/cpu.c:81:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

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

PPC: fix size optimisation ...

Since patch e92abad36307d the linker discards sections which seems not
used to make the image smaller.
But this change will discard the whole init and exception code from start.S
which renders the final image useless.

From 'barebox.map' without this patch:

Discarded input sections
 .text          0x0000000000000000     0x358c arch/ppc/mach-mpc5xxx/start.o
 .data          0x0000000000000000        0x0 arch/ppc/mach-mpc5xxx/start.o
 .bss           0x0000000000000000        0x0 arch/ppc/mach-mpc5xxx/start.o
 .got2          0x0000000000000000       0x24 arch/ppc/mach-mpc5xxx/start.o
[...]

So, define the entry point to mark the init and exception used.

From 'barebox.map' with this patch applied:

Discarded input sections
 .data          0x0000000000000000        0x0 arch/ppc/mach-mpc5xxx/start.o
 .bss           0x0000000000000000        0x0 arch/ppc/mach-mpc5xxx/start.o
[...]

Note: tested on MPC5200 at run time, for MPC85XX compile time only

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

bootm: Move bootm options to common/Kconfig ...

bootm has a C API, so the bootm options have to depend on the
option providing the bootm code (CONFIG_BOOTM), not on the
option providing the command (CONFIG_CMD_BOOTM). Fixing the
dependencies makes it possible to fully use bootm from C without
enabling the bootm command support.
This also removes the CMD_ prefix from the options which means
we have to update the defconfigs aswell.

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

Merge branch 'for-next/misc'

Merge branch 'for-next/include-pdata'

whole tree: remove trailing whitespaces ...

Signed-off-by: Du Huanpeng <u74147@gmail.com>
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 ns16550 serial platform_data to include/platform_data ...

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

include: Move fec eth platform_data to include/platform_data ...

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

PPC: atomic: remove non existing header include ...

linux/config.h does not exist. Remove its inclusion.

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

PPC: discard unused functions ...

Use --gc-sections to discard unused functions. This makes the image
smaller.

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

bootm: Push dryrun to handlers ...

We can make the dryrun option more useful by calling into the handlers.
With this we can detect more cases that can go wrong during boot.

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>

Merge branch 'for-next/restart'

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>

gpio: Drop asm-generic/gpio.h ...

Since we no longer have custom gpio function prototypes we can
drop the prototypes from asm-generic/gpio.h can add them to
include/gpio.h instead. While at it add static inline dummy wrappers
for !CONFIG_GENERIC_GPIO so that code using gpios can compile without
gpio support.

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

Merge branch 'for-next/spd'