u-boot.git/arch/arc, branch v2018.05

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

2018-05-07T13:34:12+00:00

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

ARC: Remove unused DECLARE_GLOBAL_DATA_PTR from init_helpers.c

2018-04-17T17:52:17+00:00

"Global data" structure "gd" is not used in init_helpers.c
thus DECLARE_GLOBAL_DATA_PTR might be safely removed.

Signed-off-by: Eugeniy Paltsev 
Signed-off-by: Alexey Brodkin

ARC: HSDK: Enable SPI flash support

2018-04-02T09:27:56+00:00

HSDK board has sst26wf016 SPI flash IC which we want to support.

Add SPI controller, CS-gpio and SPI flash nodes to hsdk device tree.
Enable corresponding options in hsdk defconfig.

For SPI write functionality to work we need [1] which
adds support of sst26xxx ICs.

[1] https://patchwork.ozlabs.org/project/uboot/list/?series=35796

Signed-off-by: Eugeniy Paltsev 
Signed-off-by: Alexey Brodkin

ARC: HSDK: Add platform-specific commands

2018-04-02T09:27:56+00:00

This patch add support of hsdk platform-specific commands:

hsdk_clock set - set clock from axi_freq, cpu_freq and tun_freq
environment variables/command line arguments

hsdk_clock get - save clock frequencies to axi_freq, cpu_freq
and tun_freq environment variables

hsdk_clock print - show CPU, AXI, DDR and TUNNEL current
clock frequencies.

hsdk_clock print_all - show all currently used clock frequencies.

hsdk_init - setup board HW in one of pre-defined configuration
(hsdk_hs34 / hsdk_hs36 / hsdk_hs36_ccm / hsdk_hs38 /
hsdk_hs38_ccm / hsdk_hs38x2 / hsdk_hs38x3 / hsdk_hs38x4)

hsdk_go - run baremetal application on hsdk configured
by hsdk_init command.

This patch changes default behaviour of 'bootm' command:
now we are able to set number of CPUs to be kicked by setting
'core_mask' environment variable before 'bootm' command run.

Signed-off-by: Eugeniy Paltsev 
Signed-off-by: Alexey Brodkin

ARC: AXS10x: DTS: Remove unused interrupt properties

2018-04-02T09:26:13+00:00

Some device tree nodes (like ethernet, ohci, ehci) in axs10x_mb.dtsi
were copied from linux device tree, so they have interrupts properties.
As we don't use interrupts in uboot we don't have interrupt controller
node in AXS10x device tree. In result we get warnings when we compile
such device tree.

So remove unused interrupts properties to get rid of this warnings.

Signed-off-by: Eugeniy Paltsev 
Signed-off-by: Alexey Brodkin

ARC: bootm: Refactor GO and PREP subcommands implementation

2018-03-23T12:57:51+00:00

Refactor GO and PREP subcommands implementation for a simpler
override in the boards platform code.

Signed-off-by: Eugeniy Paltsev 
Signed-off-by: Alexey Brodkin

ARC: Cache: Refactor arc_ioc_setup()

2018-03-21T14:06:55+00:00

Move all checks before cache flush and IOC setup.

Signed-off-by: Eugeniy Paltsev 
Signed-off-by: Alexey Brodkin

ARC: Cache: Add missing cache cleanup before cache disable

2018-03-21T14:06:55+00:00

Add missing cache cleanup before cache disable:
 * Flush and invalidate L1 D$ before disabling. Flush and invalidate
   SLC before L1 D$ disabling (as it will be bypassed for data)
   Otherwise we can lose some data when we disable L1 D$ if this data
   isn't flushed to next level cache. Or we can get wrong data if L1 D$
   has some entries after enable which we modified when the L1 D$ was
   disabled.
 * Invalidate L1 I$ before disabling. Otherwise we can execute wrong
   instructions after L1 I$ enable if we modified any code when
   L1 I$ was disabled.

Signed-off-by: Eugeniy Paltsev 
Signed-off-by: Alexey Brodkin

ARC: Cache: Add more HW configuration checks

2018-03-21T14:06:55+00:00

Add additional cache configuration checks and note about
supported configurations.

It is unlikely to face some configuration in real life but
it's better to be prepared and refuse to work on those.

Signed-off-by: Eugeniy Paltsev 
Signed-off-by: Alexey Brodkin

ARC: Implement a function to sync and cleanup caches

2018-03-21T14:06:54+00:00

Implement specialized function to clenup caches (and therefore
sync instruction and data caches) which can be used for cleanup before linux
launch or to sync caches during U-Boot self-relocation.

Signed-off-by: Eugeniy Paltsev 
Signed-off-by: Alexey Brodkin