Fork of alistair23 Linux kernel for reMarkable from https://github.com/alistair23/linux
6d4d367d0e
The MIPS GIC contains a block of registers used to map local interrupts to a particular CPU interrupt pin. Since these registers are found at a consecutive range of addresses we access them using an index, via the (read|write)_gic_v[lo]_map accessor functions. We currently use values from enum mips_gic_local_interrupt as those indices. Unfortunately whilst enum mips_gic_local_interrupt provides the correct offsets for bits in the pending & mask registers, the ordering of the map registers is subtly different... Compared with the ordering of pending & mask bits, the map registers move the FDC from the end of the list to index 3 after the timer interrupt. As a result the performance counter & software interrupts are therefore at indices 4-6 rather than indices 3-5. Notably this causes problems with performance counter interrupts being incorrectly mapped on some systems, and presumably will also cause problems for FDC interrupts. Introduce a function to map from enum mips_gic_local_interrupt to the index of the corresponding map register, and use it to ensure we access the map registers for the correct interrupts. Signed-off-by: Paul Burton <paul.burton@mips.com> Fixes: |
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LICENSES | ||
arch | ||
block | ||
certs | ||
crypto | ||
drivers | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.clang-format | ||
.cocciconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.mailmap | ||
COPYING | ||
CREDITS | ||
Kbuild | ||
Kconfig | ||
MAINTAINERS | ||
Makefile | ||
README |
README
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.