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

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

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

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 <trini@konsulko.com>

show more ...

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

Alexey:
1. Significantly rework cache-related functionality.
In particular that fixes coherency problems in some corner-cases,
allows us to enable and dis

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

Alexey:
1. Significantly rework cache-related functionality.
In particular that fixes coherency problems in some corner-cases,
allows us to enable and disable caches in run-time and still
have properly running system, finally support execution from
real flash (before we used to run from DDR from the very beginning).

2. Remove string routines implemented in assembly.
That allows us to build and run U-Boot on wide range of ARC cores
with different configurations. I.e. whatever tuning is used on GCC's
command-line we'll get code for desired flavor of ARC.
Otherwise for each and every corner-case we would need to add ifdefs
in assembly code to accommodate missing instructions etc.

3. Get use of GCC's garbage collector which helps to slim-down resulting image
quite a bit.

4. Also now we may disable U-Boot self-relocation for ARC if needed either
by platform or for debugging purposes.

show more ...

arc: Fine-tune implementation of memory barriers

We improve on 2 things:
1. Only ARC HS family has "dmb" instructions so do compile-time
check for automatically defined macro __ARCHS__.
Pre

arc: Fine-tune implementation of memory barriers

We improve on 2 things:
1. Only ARC HS family has "dmb" instructions so do compile-time
check for automatically defined macro __ARCHS__.
Previous check for ARCv2 ISA was not good enough because ARC EM
family is v2 ISA as well but still "dmb" instaruction is not
supported in EM family.

2. Still if there's no dedicated instruction for memory barrier
let's at least insert compile-time barrier to make sure
compiler deosn't reorder critical memory operations.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

show more ...

arc: Use asm-generic/io.h

Convert the arc architecture to make use of the new asm-generic/io.h to
provide address mapping functions. As the generic implementations are
suitable for arc this is prima

arc: Use asm-generic/io.h

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

Feedback from architecture maintainers is welcome.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Alexey Brodkin <alexey.brodkin@synopsys.com>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>

show more ...

Merge branch 'master' of git://git.denx.de/u-boot-arc

arc: Update data accessors with use of memory barriers

Memory barriers are proven to be a requirement for both compiler and
real hardware to properly serialize access to critical data.

For example

arc: Update data accessors with use of memory barriers

Memory barriers are proven to be a requirement for both compiler and
real hardware to properly serialize access to critical data.

For example if CPU or data bus it uses may do reordering of data
accesses absence of memory barriers might easily lead to very subtle and
hard to debug data corruptions.

This implementation was heavily borrowed from up to date Linux kernel.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

show more ...

Merge branch 'master' of git://git.denx.de/u-boot-arc

arc: Add virt_to_phys() stub

Commit cf7c93cdd755 "usb: ehci: Implement V2P mapping"
introduced usage of virt_to_phys() in ehci-hcd.

Since there was no implementation of virt_to_phys() for ARC
compi

arc: Add virt_to_phys() stub

Commit cf7c93cdd755 "usb: ehci: Implement V2P mapping"
introduced usage of virt_to_phys() in ehci-hcd.

Since there was no implementation of virt_to_phys() for ARC
compilation of the ehci-generic driver failed.

This change adds virt_to_phys() stub for ARC so now
USB driver for AXS101 board could be built again.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Acked-by: Marek Vasut <marex@denx.de>

show more ...

arc: add stubs for map_physmem() and unmap_physmem()

Up until now there was no need in those stubs.

But since following commit compilation of U-Boot on ARC is broken:
------------------------>8----

arc: add stubs for map_physmem() and unmap_physmem()

Up until now there was no need in those stubs.

But since following commit compilation of U-Boot on ARC is broken:
------------------------>8----------------------
commit 7861204c9af7fec1ea9b41541c272516235a6c93
Author: Stephen Warren <swarren@wwwdotorg.org>
Date: Sat Oct 3 13:56:46 2015 -0600

itest: make memory access work under sandbox

itest accesses memory, and hence must map/unmap it. Without doing so, it
accesses invalid addresses and crashes.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
------------------------>8----------------------

That's because CMD_ITEST is enabled by default in common/Kconfig and now
map_physmem()/unmap_physmem() is used there.

So this patch adds missing stubs for ARC.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>

show more ...

Merge branch 'master' of git://git.denx.de/u-boot-arm

arc: add architecture header files

These are header files used by ARC700 architecture.

Also note that "arch-arc700/hardware.h" is only required for compilation of
"designware_i2c" driver which refe

arc: add architecture header files

These are header files used by ARC700 architecture.

Also note that "arch-arc700/hardware.h" is only required for compilation of
"designware_i2c" driver which refers to "asm/arch/hardware.h".
It would be good to fix mentioned driver sometime soon but it will cause
changes in ARM board configs that use "designware_i2c".

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Francois Bedard <fbedard@synopsys.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Heiko Schocher <hs@denx.de>

show more ...