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7360e75216
Add missing cache information to the Allwinner A64 SoC dtsi, to allow
the userspace, which includes lscpu(1) that uses the virtual files provided
by the kernel under the /sys/devices/system/cpu directory, to display the
proper A64 cache information.
While there, use a more self-descriptive label for the L2 cache node, which
also makes it more consistent with other SoC dtsi files.
The cache parameters for the A64 dtsi were obtained and partially derived
by hand from the cache size and layout specifications found in the following
datasheets and technical reference manuals:
- Allwinner A64 datasheet, version 1.1
- ARM Cortex-A53 revision r0p3 TRM, version E
For future reference, here's a brief summary of the documentation:
- All caches employ the 64-byte cache line length
- Each Cortex-A53 core has 32 KB of L1 2-way, set-associative instruction
cache and 32 KB of L1 4-way, set-associative data cache
- The entire SoC has 512 KB of unified L2 16-way, set-associative cache
Signed-off-by: Dragan Simic <dsimic@manjaro.org>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Link: https://lore.kernel.org/r/6a772756c2c677dbdaaab4a2c71a358d8e4b27e9.1714304058.git.dsimic@manjaro.org
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.