u-boot.git/arch/arc, branch v2020.04

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: rework setting of ARC CPU specific compiler options

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

It's a very rare if at all existing occasion when ARC CPU template
is used as is w/o any changes - in the end it's a beauty and competitive
advantage of ARC cores to be tailored for a particular use-case - and
so it doesn't make a lot of sense to offer template-based "-mcpu" selection.
Given for each and every platform we end-up adding quite a few more flags
it's logical to move "-mcpu" selection to platform's definition as well
which we exactly do here.

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

ARC: nsim_hs38: Add support of Virtio NET & BLK

2020-02-12T17:40:24+00:00

Given now nsim_hs38 configuration is usable on QEMU and in QEMU
we have Virtio working perfectly fine the next logical step
is to add support of supported & known to work net & bkl to this
config.

Signed-off-by: Alexey Brodkin

ARC: nSIM: switch from ARC UART to DW UART

2020-02-12T17:40:24+00:00

Since v2019.06 DesingWare nSIM supports DesignWare UART simulation
and so we may switch from pretty unusual ARC UART to much more standard
DesignWare UART (which in case of U-Boot is just an ordinary 16650 UART).

This among other things makes built dinaries compatible with our other
platforms to name a few: FPGA-based HAPS boards, QEMU and even ZeBU.

Signed-off-by: Alexey Brodkin

common: Move reset_cpu() to the CPU header

2020-01-17T19:02:31+00:00

Move this function out of common.h and into a relevant header file.

Signed-off-by: Simon Glass

common: Move enable/disable_interrupts out of common.h

2019-12-02T23:25:01+00:00

Move these two functions into the irq_funcs.h header file. Also move
interrupt_handler_t as this is used by the irq_install_handler() function.

Signed-off-by: Simon Glass 
Reviewed-by: Tom Rini