diff options
Diffstat (limited to 'include/lib/aarch64/arch_helpers.h')
| -rw-r--r-- | include/lib/aarch64/arch_helpers.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/lib/aarch64/arch_helpers.h b/include/lib/aarch64/arch_helpers.h index 56d248c2..32290e26 100644 --- a/include/lib/aarch64/arch_helpers.h +++ b/include/lib/aarch64/arch_helpers.h @@ -328,6 +328,14 @@ DEFINE_RENAME_SYSREG_WRITE_FUNC(icc_eoir1_el1, ICC_EOIR1_EL1) #define IS_IN_EL1() IS_IN_EL(1) #define IS_IN_EL3() IS_IN_EL(3) +/* + * Check if an EL is implemented from AA64PFR0 register fields. 'el' argument + * must be one of 1, 2 or 3. + */ +#define EL_IMPLEMENTED(el) \ + ((read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL##el##_SHIFT) \ + & ID_AA64PFR0_ELX_MASK) + /* Previously defined accesor functions with incomplete register names */ #define read_current_el() read_CurrentEl() |