u-boot.git/arch/arc, branch v2016.03

arc: cache - utilize IO coherency (AKA IOC) engine

2016-02-20T08:20:05+00:00

With release of ARC HS38 v2.1 new IO coherency engine could be built-in
ARC core. This hardware module ensures coherency between DMA-ed data
from peripherals and L2 cache.

With L2 and IOC enabled there's no overhead for L2 cache manual
maintenance which results in significantly improved IO bandwidth.

Signed-off-by: Alexey Brodkin

arc: cache - accommodate different L1 cache line lengths

2016-02-20T08:19:53+00:00

ARC core could be configured with different L1 and L2 (AKA SLC) cache
line lengths. At least these values are possible and were really used:
32, 64 or 128 bytes.

Current implementation requires cache line to be selected upon U-Boot
configuration and then it will only work on matching hardware. Indeed
this is quite efficient because cache line length gets hardcoded during
code compilation. But OTOH it makes binary less portable.

With this commit we allow U-Boot to determine real L1 cache line length
early in runtime and use this value later on. This extends portability
of U-Boot binary a lot.

Signed-off-by: Alexey Brodkin

Fix board init code to respect the C runtime environment

2016-01-14T02:05:17+00:00

board_init_f_mem() alters the C runtime environment's
stack it is actually already using. This is not a valid
behaviour within a C runtime environment.

Split board_init_f_mem into C functions which do not alter
their own stack and always behave properly with respect to
their C runtime environment.

Signed-off-by: Albert ARIBAUD 
Acked-by: Thomas Chou

axs103: add support of generic OHCI USB 1.1 controller

2015-12-21T20:29:04+00:00

This commit adds support of USB 1.1 storage media on AXS103 board.
For some yet unknown reason USB 2.0 doesn't work on AXS103 board issuing
messages like this:
------------------------>8-------------------
AXS# usb start
starting USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... EHCI timed out on TD - token=0x80008c80
unable to get device descriptor (error=-1)
1 USB Device(s) found
------------------------>8-------------------

As a work-around we're falling back to USB 1.1.
Indeed it is much slower but at least USB storage devices are usable on
AXS103.

Signed-off-by: Alexey Brodkin 
Cc: Marek Vasut 
Cc: Simon Glass

axs10x: add support of generic EHCI USB 2.0 controller

2015-12-08T14:29:56+00:00

This commit adds support of USB 2.0 storage media on AXS10x boards.

Signed-off-by: Alexey Brodkin 
Cc: Marek Vasut 
Cc: Simon Glass

board: axs10x switch serial port and Ethernet to driver model

2015-11-17T21:39:22+00:00

With this change Synopsys DesignWare SDP board is switched to driver
model for both serial port (serial_dw) and Ethernet (Designware GMAC).

This simplifies include/configs/axs101.h and allows for reuse of Linux's
Device Tree description.

For simplicity Linux's .dts files are not blindly copied but only very
few extracts of them are really used (those that are supported in U-Boot
at the moment).

Signed-off-by: Alexey Brodkin 
Reviewed-by: Simon Glass 
Cc: Masahiro Yamada

arc: add empty asm/processor.h to satisfy compilation of USB code

2015-11-17T21:39:22+00:00

common/usb.c unconditionally includes 
And now to allow USB support on ARC boards we have to have that header.

Signed-off-by: Alexey Brodkin

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

2015-11-17T21:38:35+00:00

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 
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 
    Reviewed-by: Simon Glass 
------------------------>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 
Reviewed-by: Simon Glass 
Cc: Stephen Warren

Various Makefiles: Add SPDX-License-Identifier tags

2015-11-10T14:19:52+00:00

After consulting with some of the SPDX team, the conclusion is that
Makefiles are worth adding SPDX-License-Identifier tags too, and most of
ours have one.  This adds tags to ones that lack them and converts a few
that had full (or in one case, very partial) license blobs into the
equivalent tag.

Cc: Kate Stewart 
Signed-off-by: Tom Rini

arc: Use the generic bitops headers

2015-11-05T15:52:29+00:00

The generic bitops headers are required when calling logarithmic
functions, such as ilog2().

Signed-off-by: Fabio Estevam