Commit e6a6b34f authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas
Browse files

arm64/sysreg: Introduce helpers for access to sysreg fields 



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: default avatarMark Rutland <mark.rutland@arm.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220503170233.507788-2-broonie@kernel.org


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent b2d229d4

arch/arm64/include/asm/sysreg.h

+6 −0
Original line number Diff line number Diff line
@@ -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 */