u-boot.git/arch/arc/include, branch v2020.07

common: Drop linux/bitops.h from common header

2020-05-19T01:19:23+00:00

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass

ARC: HSDK-4xD: add CSM configuration support

2020-04-27T08:20:27+00:00

Add support for CSM enable/disable and CSM relocation via
hsdk_init command. We allow to relocate CSM to the beginning of
any aperture even if HW support finer granularity.

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

ARC: ARCv2: handle DSP presence in HW

2020-04-27T08:20:25+00:00

In case of DSP extension presence in HW some instructions
(related to integer multiply, multiply-accumulate, and divide
operation) executes on this DSP execution unit. So their
execution will depend on dsp configuration register (DSP_CTRL)
As we want these instructions to execute the same way regardless
of DSP presence we need to set DSP_CTRL properly.

NOTE:
we do the same adjustments in Linux kernel, see in kernel tree:
commit 4827d0cf744e ("ARC: handle DSP presence in HW")

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

ARC: CACHE: add support for SL$ disable

2020-04-16T20:36:36+00:00

Since version 3.0 ARC HS supports SL$ (L2 system level cache)
disable. So add support for SL$ disable/enable to code.

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

ARC: IO: add MB for __raw_* memory accessors

2020-03-31T15:31:53+00:00

We add memory barriers for __raw_readX / __raw_writeX accessors same
way as it is done for readX and writeX accessors as lots of U-boot
driver uses __raw_readX / __raw_writeX instead of proper accessor
with barrier.

It will save us from lot's of debugging in the future and it is OK
as U-Boot is not that performance oriented as real run-time
software like OS or user bare-metal app so we may afford being not
super fast as we only being executed once.

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

ARC: IO: add compiler barriers to IO accessors

2020-03-31T15:31:53+00:00

We must use compiler barriers in C-version read/write IO accessors
before and after operation (read or write) so it won't be reordered
by compiler.

Fixes commit 07906b3dad15 ("ARC: Switch to generic accessors")

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

ARC: IO: add volatile to accessors

2020-03-31T15:25:16+00:00

We must use 'volatile' in C-version read/write IO accessors
implementation to avoid merging several reads (writes) into
one read (write), or optimizing them out by compiler.

Fixes commit 07906b3dad15 ("ARC: Switch to generic accessors")

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

dma-mapping: add for all architectures

2020-02-20T07:09:54+00:00

To avoid "asm/dma-mapping.h: No such file or directory" error,
we need something.

Signed-off-by: Masahiro Yamada

ARC: Switch to generic accessors

2020-02-12T18:11:13+00:00

First of all U-Boot is not that performance oriented as real run-time
software like OS or user bare-metal app so we may afford being not super
fast as we only being executed once. That in return allows us to be more
universal and support wider variety of devices.

And looking forward that will significantly reduce maintenance and simplify
support of newer architectures.

And while at it we add quad-word accessors like readq(), writeq() etc.

Signed-off-by: Alexey Brodkin

ARC: cache: define CONFIG_SYS_CACHELINE_SIZE as ARCH_DMA_MINALIGN

2019-01-25T05:41:09+00:00

Even though we don't use CONFIG_SYS_CACHELINE_SIZE in ARC-specific code
it is used a lot in different drivers for alignment purposes.

So we define it and make much more drivers at least compilable for ARC.

Signed-off-by: Alexey Brodkin