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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>
This commit is contained in:
Mark Brown 2022-05-03 18:02:22 +01:00 committed by Catalin Marinas
parent b2d229d4dd
commit e6a6b34f97
1 changed files with 6 additions and 0 deletions
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6
arch/arm64/include/asm/sysreg.h
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@ -1345,4 +1345,10 @@
#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 */