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Tanmay Shah
b31bcda55f
In lockstep mode, r5 core0 uses TCM of R5 core1. Following is lockstep
mode memory region as per hardware reference manual.
| *TCM* | *R5 View* | *Linux view* |
| R5_0 ATCM (128 KB) | 0x0000_0000 | 0xFFE0_0000 |
| R5_0 BTCM (128 KB) | 0x0002_0000 | 0xFFE2_0000 |
However, driver shouldn't model it as above because R5 core0 TCM and core1
TCM has different power-domains mapped to it.
Hence, TCM address space in lockstep mode should be modeled as 64KB
regions only where each region has its own power-domain as following:
| *TCM* | *R5 View* | *Linux view* |
| R5_0 ATCM0 (64 KB) | 0x0000_0000 | 0xFFE0_0000 |
| R5_0 BTCM0 (64 KB) | 0x0002_0000 | 0xFFE2_0000 |
| R5_0 ATCM1 (64 KB) | 0x0001_0000 | 0xFFE1_0000 |
| R5_0 BTCM1 (64 KB) | 0x0003_0000 | 0xFFE3_0000 |
This makes driver maintanance easy and makes design robust for future
platorms as well.
Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>
Link: https://lore.kernel.org/r/20240412183708.4036007-2-tanmay.shah@amd.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.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.