diff options
Diffstat (limited to 'include/lib/aarch64/arch_helpers.h')
| -rw-r--r-- | include/lib/aarch64/arch_helpers.h | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/include/lib/aarch64/arch_helpers.h b/include/lib/aarch64/arch_helpers.h index d90061f2..61f9830d 100644 --- a/include/lib/aarch64/arch_helpers.h +++ b/include/lib/aarch64/arch_helpers.h @@ -4,11 +4,12 @@ * SPDX-License-Identifier: BSD-3-Clause */ -#ifndef __ARCH_HELPERS_H__ -#define __ARCH_HELPERS_H__ +#ifndef ARCH_HELPERS_H +#define ARCH_HELPERS_H #include <arch.h> /* for additional register definitions */ #include <cdefs.h> /* For __dead2 */ +#include <stdbool.h> #include <stdint.h> #include <string.h> @@ -363,12 +364,22 @@ static inline unsigned int get_current_el(void) } /* - * Check if an EL is implemented from AA64PFR0 register fields. 'el' argument - * must be one of 1, 2 or 3. + * Check if an EL is implemented from AA64PFR0 register fields. */ -#define EL_IMPLEMENTED(el) \ - ((read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL##el##_SHIFT) \ - & ID_AA64PFR0_ELX_MASK) +static inline uint64_t el_implemented(unsigned int el) +{ + if (el > 3U) { + return EL_IMPL_NONE; + } else { + unsigned int shift = ID_AA64PFR0_EL1_SHIFT * el; + + return (read_id_aa64pfr0_el1() >> shift) & ID_AA64PFR0_ELX_MASK; + } +} + +#if !ERROR_DEPRECATED +#define EL_IMPLEMENTED(_el) el_implemented(_el) +#endif /* Previously defined accesor functions with incomplete register names */ @@ -389,4 +400,4 @@ static inline unsigned int get_current_el(void) #define read_cpacr() read_cpacr_el1() #define write_cpacr(_v) write_cpacr_el1(_v) -#endif /* __ARCH_HELPERS_H__ */ +#endif /* ARCH_HELPERS_H */ |