shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-09 04:10:18 +09:00
Code Issues Packages Projects Releases Wiki Activity

arm64: mm: use ubfm for dcache_line_size

Browse Source 
Use 'ubfm' for the bitfield move instruction; thus, single
instruction can be used instead of two instructions, when
getting the minimum D-cache line size from CTR_EL0 register.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit bd5f6dc304)
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Jingoo Han
2014-01-20 05:00:21 +00:00
committed by Mark Brown
parent 5c1bcd9ba5
commit a0d25707b7
1 changed files with 1 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm64/mm/proc-macros.S
View File

@@ -38,8 +38,7 @@
*/
.macro dcache_line_size, reg, tmp
mrs \tmp, ctr_el0 // read CTR
lsr \tmp, \tmp, #16
and \tmp, \tmp, #0xf // cache line size encoding
ubfm \tmp, \tmp, #16, #19 // cache line size encoding
mov \reg, #4 // bytes per word
lsl \reg, \reg, \tmp // actual cache line size
.endm