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

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

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 <abrodkin@synopsys.com>

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

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 <abrodkin@synopsys.com>

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 <abrodkin@synopsys.com>

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

Signed-off-by: Simon Glass <sjg@chromium.org>

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

Signed-off-by: Simon Glass <sjg@chromium.org>

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 <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

These functions do not use driver model but are fairly widely used in
U-Boot. But it is not clear that they will use driver model anytime soon,
so we don't want to label them as 'legacy'.

Move them to a new irq_func.h header file. Avoid the name 'irq.h' since it
is widely used in U-Boot already.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

These functions belong in cpu_func.h. Another option would be cache.h
but that code uses driver model and we have not moved these cache
functions to use driver model. Since they are CPU-related it seems
reasonable to put them here.

Move them over.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

At present this function sits in its own file but it does not really
justify it. There are similar string functions in vsprintf.h, so move it
there. Also add the missing function comment.

Use the vsprintf.h include file explicitly where needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

Somehow EMSDP & IoT DK boards were skipped on ARC boads conversion
to DM MMC. So doing it now.

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

The commit
642b80d2 ("net: designware: drop compatible altr, socfpga-stmmac")
breaks designware ethernet for all ARC boards. It removes
"altr, socfpga-stmmac" compatible from "drivers/net/designware.c"
without changing compatible in the boards which use it.

Fix that by adding "snps,arc-dwmac-3.70a" compatible string to
"drivers/net/designware.c" and using it in ARC boards device tree.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>

As reported by Kever here [1] we were unable to compile 64-bit division
code due to missing definition of __udivdi3().

Import its implementation and __udivmoddi4() as its direct dependency
from today's libgcc [2].

[1] https://patchwork.ozlabs.org/patch/1146845/
[2] https://github.com/gcc-mirror/gcc/commit/5d8723600bc0eed41226b5a6785bc02a053b45d5



Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Kever Yang <kever.yang@rock-chips.com>

While converting CONFIG_SYS_[DI]CACHE_OFF to Kconfig, there are instances
where these configuration items are conditional on SPL. This commit adds SPL
variants of these configuration items, uses CONFIG_IS_ENABLED(), and updates
the configurations as required.

Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Trevor Woerner <trevor@toganlabs.com>
[trini: Make the default depend on the setting for full U-Boot, update
more zynq hardware]
Signed-off-by: Tom Rini <trini@konsulko.com>

CONFIG_SYS_[DI]CACHE_OFF had been partially converted to Kconfig
parameters; only for the ARC architecture. This patch turns these two
parameters into Kconfig items everywhere else they are found.

All of the include/configs/* and defconfig changes in this patch are
for arm machines only. The Kconfig changes for arc, nds32, riscv,
and xtensa have been included since these symbols are found in code
under arch/{arc,nds32,riscv,xtensa}, however, no currently-defined
include/configs/* or defconfigs for these architectures exist which
include these symbols.

These results have been confirmed with tools/moveconfig.py.

Acked-by: Alexey Brodkin <abrodkin@snopsys.com>
Signed-off-by: Trevor Woerner <trevor@toganlabs.com>
[trini: Re-migrate for a few more boards]
Signed-off-by: Tom Rini <trini@konsulko.com>

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

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

There is no reason not to use the Linux "jedec,spi-nor" binding in U-Boot
dts files. This compatible has been added in sf_probe, let use it.

This patch switches to jedec,spi-nor when spi-flash is used in the DTS
and DTSI files, and removed spi-flash when jedec,spi-nor is already
present.

The x86 dts are switched in a separate commit since it depends on a change
in fdtdec.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Evgeniy Paltsev <paltsev@synopsys.com>
Reviewed-by: Rick Chen <rick@andestech.com>
Reviewed-by: Patrick Delaunay <Patrick.delaunay@st.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>

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 <abrodkin@synopsys.com>

"i" gets incremented before we're entering loop body
and effectively we iterate from 1 to 8 instead of 0 to 7.

This way we:
 a) Skip the first line of struct hs_versions
 b) Go over it and access memory beyond the structure

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

The bounce buffer is used by a few drivers (most of the MMC drivers)
to overcome limitations in their respective DMA implementation.

This moves the configuration to Kconfig and makes it user-selectable
(even though it will be a required feature to make those drivers
work): the expected usage is for drivers depending on this to 'select'
it unconditionally from their respective Kconfig (see follow-up
patches).

This commit includes a full migration using moveconfig.py to ensure
that each commit compiles.  To ensure bisectability we update
dependencies of various drivers to now select BOUNCE_BUFFER when needed.

[trini: Squash all patches to ensure bisectability]
Signed-off-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Otavio Salvador <otavio@ossystems.com.br> [dw_mmc portion]
Reviewed-by: Fabio Estevam <festevam@gmail.com> [mxsmmc portion]
Reviewed-by: Simon Glass <sjg@chromium.org> [tegra portion]

1. Try to guess a ARC core template that was used
   i.e. not just name a core family but something more
   menaingful like "ARC HS38", "ARC EM11D" etc.

   We do it checking availability of the key differentiation
   features like:
    - Caches (we actually only check for L1 I$ fpr simplicity)
    - XY-memory
    - DSP extensions etc.

2. Identify ARC subsystems

3. Print core clock frequency

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

Real marketing name of the board was recently updated so
to accommodate that change renaming the board and all
related to it.

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

By default GCC puts global non-initialized variables in COMMON section.
And we used to ignore existence of COMMON section in our linker
scripts though smart LD silently appended it right after .bss.

And the problem here is variables from COMMON section even though
require zeroing in run-time were not zeroed as they were placed
right after __bss_end symbol.

It was a pure luck we never faced serious problem due to this,
but now it is fixed.

Now as for some other architectures we'll just force GCC to put
those global variables in normal .bss section.

This solution is much nicer than adding COMMON section to each and
every linker script.

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

This allows board to override print_cpuinfo() because
they might know better which ARChitect template was used.
This way we may not only derive base architecture type and
version but more meaningful things like "ARC EM7D" instead of
simple "ARC EM", "ARC HS36" instead of "ARC HS".

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

The DesignWare ARC IoT Development Kit is a versatile platform
that includes the necessary hardware and software to accelerate
software development and debugging of sensor fusion,
voice recognition and face detection designs.

More information is avaialble here [1] and here [2].

The board is based on real silicon with
ARC EM9D-based Data Fusion IP Subsystem.

It sports a rich set of I/O including
 * DW USB OTG
 * DW MobileStorage (used for micro SD-card)
 * GPIO
 * multiple serial interface including DW APB UART
 * ADC, PWM and eFlash, SRAM and SPI Flash memory
 * Real-Time Clock (RTC)
 * Bluetooth module with worldwide regulatory compliance
   (FCC, IC, CE, ETSI, TELEC)
 * On-board 9-axis sensor (gyro, accelerometer and compass)

Extensible with Arduino, Pmod, mikroBUS connectors and a 2x18
extension header.

One of the most interesting features for developers is built-in
Digilent USB JTAG probe so only micro-USB cable is needed!

[1] https://www.synopsys.com/dw/ipdir.php?ds=arc_iot_development_kit
[2] https://www.synopsys.com/dw/doc.php/ds/cc/iot_dev_kit.pdf



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

Once we enable DISPLAY_CPUINFO for ARC we'll see
ARC core family and version printed on boot.

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

1. This way we sync with Linux kernel where we have model
   set for all ARC boards for quite some time, see [1]

2. Once we enable DISPLAY_BOARDINFO for ARC this info will
   be printed on boot givin some extra data-point about the board

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=618a9cd06dd471ac232f5b27325b24d26eba5571



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

Even though arc-linux- prefix is used in ARC prebuilt tools and
in Buildroot there're other options like Linux distro cross-tools
etc where prefix is different so let's not rely on this default.

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

All architectures have the same definition for s8/16/32/64
and u8/16/32/64.

Factor out the duplicated code into <asm-generic/int-ll64.h>.

BTW, Linux unified the kernel space definition into int-ll64.h
a few years ago as you see in Linux commit 0c79a8e29b5f
("asm/types.h: Remove include/asm-generic/int-l64.h").

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

CPU (and hence cpu timers) on HSDK board runs at 500MHz after
preloader so fix wrong CPU frequency value in hsdk.dts

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>

Even if ARC core might handle unaligned access to data this
hardware feature by default is disabled.

But GCC starting from 8.1.0 unconditionally uses it for ARC HS cores.
Which leads to quite strange and fatal run-time failures like the one
below if HW is not configured properly:
| hsdk# sf probe
| Misaligned data access exception @ 0xbff794d4
| ECR:    0x000d0000
| RET:    0xbff794d4
| BLINK:  0xbff79644
| STAT32: 0x00000800
| GP: 0x1003e000   r25: 0xbfd58f08
| BTA: 0xbff794a4  SP: 0xbfd58cd4  FP: 0xbfd58ef0
| LPS: 0xbff90240 LPE: 0xbff90244 LPC: 0x00000000
| r00: 0x00000000 r01: 0x00000003 r02: 0x000026bf
| r03: 0x00000000 r04: 0x00000100 r05: 0x00000000
| r06: 0x00000001 r07: 0x00000000 r08: 0x1dcd6500
| r09: 0x00000000 r10: 0x00200000 r11: 0x00000000
| r12: 0x1b3d4440 r13: 0xbff9eca4 r14: 0xbfd59d68
| r15: 0xbfd60cd0 r16: 0x00000000 r17: 0x00000000
| r18: 0xbff9ed14 r19: 0xbfd59c78 r20: 0xbfd58d40
| r21: 0xbfd58d44 r22: 0x00000000 r23: 0x00000000
| r24: 0xbfd59ba8
| Resetting CPU ...

Now we're checking for __ARC_UNALIGNED__ define emitted by the
compiler if it's going to use unaligned access and then we
force-enable it in hardware too.

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

AXS10x boards have n25q512 spi flash IC, so add corresponding
nodes to device tree and enaple corresponding options in
defconfig.

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

CREG GPIO is a driver for weird soc-specific output ports, which are
controlled by some fields in memory mapped register.

Example:

31                 9        7        5           0   < bit number
|                  |        |        |           |
[     not used     | gpio-1 | gpio-0 | <-shift-> ]   < 32 bit register
                       ^        ^
                       |        |
                write 0x2 == set output to "1" (activate)
                write 0x3 == set output to "0" (deactivate)

As of tooday we only support fixed (hardcoded) bit per gpio line,
activate / deactivatei and shift values. Fix that by read them from
device tree to be able to use this driver for other boards.

Remove "hsdk" prefix from compatible string as this driver can be
used with different boards like HSDK, AXS101, AXS103, etc.

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

Another round of sorting Kconfig entries aplhabetically.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>

Follow Linux commit 10b62a2f785a (".gitignore: move *.dtb and *.dtb.S
patterns to the top-level .gitignore").

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

Synopsys DesignWare ARC EM Development Kit (ARC EMDK) is
an FPGA-based development platform from Synopsys aimed to speed-up
development of software for ARC EM cores and entire subsystems based on
ARC EM like Data Fusion, Secure and Sensor & Control subsystems.

U-Boot is supposed to be used as a primary bootloader on EMDK allowing
users to easily load and start their application from micro-SD card.

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

As it is stated in LD manual [1] the second entry in OUTPUT_FORMAT
corresponds to "-EB" command-line option which for us is "elf32-bigarc".

[1] https://sourceware.org/binutils/docs/ld/Format-Commands.html#Format-Commands



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

This will allow for board-specific implementation of reset.
Default version will just stop execution with help of BRK instruction.

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