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arm64: Implement pmem API support

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Add a clean-to-point-of-persistence cache maintenance helper, and wire
up the basic architectural support for the pmem driver based on it.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
[catalin.marinas@arm.com: move arch_*_pmem() functions to arch/arm64/mm/flush.c]
[catalin.marinas@arm.com: change dmb(sy) to dmb(osh)]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Robin Murphy
2017-07-25 11:55:42 +01:00
committed by Catalin Marinas
parent e1bc5d1b8e
commit d50e071fda
7 changed files with 61 additions and 1 deletions
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6
arch/arm64/include/asm/assembler.h
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@@ -352,6 +352,12 @@ alternative_if_not ARM64_WORKAROUND_CLEAN_CACHE
dc \op, \kaddr
alternative_else
dc civac, \kaddr
alternative_endif
.elseif (\op == cvap)
alternative_if ARM64_HAS_DCPOP
sys 3, c7, c12, 1, \kaddr // dc cvap
alternative_else
dc cvac, \kaddr
alternative_endif
.else
dc \op, \kaddr