Geert Uytterhoeven 8d17004ebc ARM: shmobile: r8a7779: Reserve boot area when SMP is enabled
CPU core bringup on R-Car H1 uses the ARM Reset Vector Address Register
(AVECR) to specify the base address and size of the boot area of the
System CPU.  With this enabled, when the System CPU accesses a physical
address in the range from zero up to the configured size, the top
address bits are replaced by those specified in the AVECR register.
Hence any device residing in this low part of physical address space
cannot be accessed,

Prevent conflicts by reserving this memory region using
request_mem_region().

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/924961188abdf2adb52167edb7ed848a6efcca39.1693409184.git.geert+renesas@glider.be
2023-09-27 11:00:27 +02:00
2022-09-28 09:02:20 +02:00
2023-09-10 16:28:41 -07:00

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 Restructured Text 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.
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