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UPSTREAM: arm64/sysreg: Introduce helpers for access to sysreg fields

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The macros we define for the bitfields within sysregs have very regular
names, especially once we switch to automatic generation of those macros.
Take advantage of this to define wrappers around FIELD_PREP() allowing
us to simplify setting values in fields either numerically

   SYS_FIELD_PREP(SCTLR_EL1, TCF0, 0x0)

or using the values of enumerations within the fields

   SYS_FIELD_PREP_ENUM(SCTLR_EL1, TCF0, ASYMM)

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220503170233.507788-2-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit e6a6b34f97)
Signed-off-by: Will Deacon <willdeacon@google.com>
Bug: 233587962
Bug: 233588291
Change-Id: I8bb340668e7b82fe91ce523bb39cdc2b52557b52
This commit is contained in:
Mark Brown
2022-05-03 18:02:22 +01:00
committed by Will Deacon
parent eb06a93511
commit 1bf4f91abe
1 changed files with 6 additions and 0 deletions
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6
arch/arm64/include/asm/sysreg.h
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@@ -1420,4 +1420,10 @@
#endif
#define SYS_FIELD_PREP(reg, field, val) \
FIELD_PREP(reg##_##field##_MASK, val)
#define SYS_FIELD_PREP_ENUM(reg, field, val) \
FIELD_PREP(reg##_##field##_MASK, reg##_##field##_##val)
#endif /* __ASM_SYSREG_H */