arm64: Allow the definition of UNKNOWN system register fields

Browse source

The CCSIDR_EL1 register contains an UNKNOWN field (which replaces
fields that were actually defined in previous revisions of the
architecture).

Define an 'Unkn' field type modeled after the Res0/Res1 types
to allow such description. This allows the generation of

  #define CCSIDR_EL1_UNKN     (UL(0) | GENMASK_ULL(31, 28))

which may have its use one day. Hopefully the architecture doesn't
add too many of those in the future.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230112023852.42012-2-akihiko.odaki@daynix.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

...

This commit is contained in:

Marc Zyngier 2023-01-12 11:38:46 +09:00 • committed by Oliver Upton

parent b7bfaa761d

commit e2c0b51f1c

2 changed files with 21 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

20

arch/arm64/tools/gen-sysreg.awk

View file

2

arch/arm64/tools/sysreg

View file