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ArmPkg/Library/ArmLib: add ArmWriteSctlr

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This currently isn't needed by anything in the edk2 tree but
it's useful for externally maintained platforms which have
to set this register e.g. to disable alignment aborts.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael Zimmermann <sigmaepsilon92@gmail.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
This commit is contained in:
Michael Zimmermann
2018-01-13 07:52:45 +01:00
committed by Ard Biesheuvel
parent 29af38b0f8
commit 1e1d16971d
4 changed files with 22 additions and 0 deletions
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4
ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S
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@@ -153,6 +153,10 @@ ASM_FUNC(ArmReadSctlr)
mrc p15, 0, r0, c1, c0, 0 @ Read SCTLR into R0 (Read control register configuration data)
bx lr
ASM_FUNC(ArmWriteSctlr)
mcr p15, 0, r0, c1, c0, 0
bx lr
ASM_FUNC(ArmReadCpuActlr)
mrc p15, 0, r0, c1, c0, 1
bx lr