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author | Mark Rutland <mark.rutland@arm.com> | 2014-07-16 15:32:43 (GMT) |
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committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-07-18 14:24:08 (GMT) |
commit | 89c4a306e7631bcb71cc537c8a029172af6047fe (patch) | |
tree | 57fff43760ad3abdfc1a4eca49b6a3b8b932bfa0 /firmware | |
parent | 18ab7db6b749ac27aac08d572afbbd2f4d937934 (diff) | |
download | linux-89c4a306e7631bcb71cc537c8a029172af6047fe.tar.xz |
arm64: add MIDR_EL1 field accessors
The MIDR_EL1 register is composed of a number of bitfields, and uses of
the fields has so far involved open-coding of the shifts and masks
required.
This patch adds shifts and masks for each of the MIDR_EL1 subfields, and
also provides accessors built atop of these. Existing uses within
cputype.h are updated to use these accessors.
The read_cpuid_part_number macro is modified to return the extracted
bitfield rather than returning the value in-place with all other fields
(including revision) masked out, to better match the other accessors.
As the value is only used in comparison with the *_CPU_PART_* macros
which are similarly updated, and these values are never exposed to
userspace, this change should not affect any functionality.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'firmware')
0 files changed, 0 insertions, 0 deletions