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arm64: sysreg: Emit RESx/UNKN values for Mapping/Fields definitions

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The sysreg file is using the Mapping or Fields qualifiers to indicate
that a given encoding is only a mapping to a particular register (or
an instance of a more generic register definition).

As a result, we don't output any definition, and instead expect
the canonical definitions to be used.

This works rather well for individual fields, but creates problems
for macros that refer to more generic classes of bits such as RESx.

Relax the above rule by emitting the RESx and UNKN values for Mapping
and Fields qualifiers as well.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://patch.msgid.link/20260730071022.296811-2-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
This commit is contained in:
Marc Zyngier 2026-07-30 08:09:54 +01:00 committed by Oliver Upton
parent a13c140cc2
commit 6ae7fab7d9
1 changed files with 4 additions and 4 deletions
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8
arch/arm64/tools/gen-sysreg.awk
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@ -228,7 +228,7 @@ $1 == "EndSysreg" && block_current() == "Sysreg" {
}
# Currently this is effectivey a comment, in future we may want to emit
# defines for the fields.
# defines for the fields. We do emit RESx and UNKN values in any case.
($1 == "Fields" || $1 == "Mapping") && block_current() == "Sysreg" {
expect_fields(2)
@ -239,9 +239,9 @@ $1 == "EndSysreg" && block_current() == "Sysreg" {
print ""
next_bit = -1
res0 = null
res1 = null
unkn = null
res0 = $2 "_RES0"
res1 = $2 "_RES1"
unkn = $2 "_UNKN"
next
}