| 9bef24d0 | 03-Aug-2016 |
Alexey Brodkin <abrodkin@synopsys.com> |
arc: No need in sections defined in sources with newer tools
Starting from arc-2016.03 GNU tools linker properly works with
symbols defined in linker script and so external declarations
are no longe
arc: No need in sections defined in sources with newer tools
Starting from arc-2016.03 GNU tools linker properly works with
symbols defined in linker script and so external declarations
are no longer required, dump them.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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| 699c4e59 | 04-Aug-2016 |
Alexey Brodkin <abrodkin@synopsys.com> |
arc: Update exception & interrupt handling for ARCv2
Initially IVT for ARCv2 was simply copypasted from ARCompact
with some selected fixes so basic stuff works.
Now we update it with more ARCv2 spe
arc: Update exception & interrupt handling for ARCv2
Initially IVT for ARCv2 was simply copypasted from ARCompact
with some selected fixes so basic stuff works.
Now we update it with more ARCv2 specific vectors like
* Software Interrupt
* Division by zero
* Data cache consistency error
* Misaligned access
Also normal interrupts are now implemented properly and extened to
all possible 240 items.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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| a4a43fcf | 08-Jun-2016 |
Alexey Brodkin <abrodkin@synopsys.com> |
arc/cache: Flush & invalidate all caches right before enabling IOC
According to ARC HS databook it is required to flush and disable
caches prior programming IOC registers. Otherwise ongoing coherent
arc/cache: Flush & invalidate all caches right before enabling IOC
According to ARC HS databook it is required to flush and disable
caches prior programming IOC registers. Otherwise ongoing coherent
memory operations may not observe the coherency protocols as
expected.
But since in ARC HS v2.1 there's no way to disable SLC (AKA L2 cache)
we're doing our best flushing and invalidating it.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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| db6ce231 | 14-Dec-2015 |
Alexey Brodkin <Alexey.Brodkin@synopsys.com> |
arc: cache - utilize IO coherency (AKA IOC) engine
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 p
arc: cache - utilize IO coherency (AKA IOC) engine
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 <abrodkin@synopsys.com>
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| ef639e6f | 18-May-2015 |
Alexey Brodkin <Alexey.Brodkin@synopsys.com> |
arc: significant cache rework
[1] Align cache management functions to those in Linux kernel. I.e.:
a) Use the same functions for all cache ops (D$ Inv/Flush)
b) Split cache ops in 3 sub-func
arc: significant cache rework
[1] Align cache management functions to those in Linux kernel. I.e.:
a) Use the same functions for all cache ops (D$ Inv/Flush)
b) Split cache ops in 3 sub-functions: "before", "lineloop" and
"after". That way we may re-use "before" and "after" functions for
region and full cache ops.
[2] Implement full-functional L2 (SLC) management. Before SLC was
simply disabled early on boot. It's also possible to enable or disable
L2 cache from config utility.
[3] Disable/enable corresponding caches early on boot. So if U-Boot is
configured to use caches they will be used at all times (this is useful
in partucular for speed-up of relocation).
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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| a811492e | 10-Apr-2015 |
Alexey Brodkin <abrodkin@synopsys.com> |
arc: fix separate compilation of start.o
While testing "arc: make sure _start is in the beginning of .text
section" I haven't done proper clean-up of built binaries and so missed
another tiny bit th
arc: fix separate compilation of start.o
While testing "arc: make sure _start is in the beginning of .text
section" I haven't done proper clean-up of built binaries and so missed
another tiny bit that lead to the following error:
--->8---
LD u-boot
arc-linux-ld.bfd: cannot find arch/arc/lib/start.o
Makefile:1107: recipe for target 'u-boot' failed
make: *** [u-boot] Error 1
--->8---
Fix is trivial: put "start.o" in "extra-y".
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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| 6eb15e50 | 30-Mar-2015 |
Alexey Brodkin <abrodkin@synopsys.com> |
arc: add support for SLC (System Level Cache, AKA L2-cache)
ARCv2 cores may have built-in SLC (System Level Cache, AKA L2-cache).
This change adds functions required for controlling SLC:
* slc_enab
arc: add support for SLC (System Level Cache, AKA L2-cache)
ARCv2 cores may have built-in SLC (System Level Cache, AKA L2-cache).
This change adds functions required for controlling SLC:
* slc_enable/disable
* slc_flush/invalidate
For now we just disable SLC to escape DMA coherency issues until either:
* SLC flush/invalidate is supported in DMA APIin U-Boot
* hardware DMA coherency is implemented (that might be board specific
so probably we'll need to have a separate Kconfig option for
controlling SLC explicitly)
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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| 3fb80163 | 24-Feb-2015 |
Alexey Brodkin <abrodkin@synopsys.com> |
arc: clean-up init procedure
Intention behind this work was elimination of as much assembly-written
code as it is possible.
In case of ARC we already have relocation fix-up implemented in C so why
arc: clean-up init procedure
Intention behind this work was elimination of as much assembly-written
code as it is possible.
In case of ARC we already have relocation fix-up implemented in C so why
don't we use C for U-Boot copying, .bss zeroing etc.
It turned out x86 uses pretty similar approach so we re-used parts of
code in "board_f.c" initially implemented for x86.
Now assembly usage during init is limited to stack- and frame-pointer
setup before and after relocation.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Simon Glass <sjg@chromium.org>
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| 8ee28251 | 24-Feb-2015 |
Alexey Brodkin <abrodkin@synopsys.com> |
arc: move low-level interrupt and exception handlers in a separate file
This separation makes maintenance of code easier because those low-level
interrupt- or exception handling routines are pretty
arc: move low-level interrupt and exception handlers in a separate file
This separation makes maintenance of code easier because those low-level
interrupt- or exception handling routines are pretty static and usually
require not much care while start-up code is a subject of modifications
and enhancements.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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