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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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9
ArmPkg/Library/ArmLib/AArch64/ArmLibSupport.S
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@@ -187,4 +187,13 @@ ASM_FUNC(ArmReadSctlr)
3:mrs x0, sctlr_el3
4:ret
ASM_FUNC(ArmWriteSctlr)
EL1_OR_EL2_OR_EL3(x1)
1:msr sctlr_el1, x0
ret
2:msr sctlr_el2, x0
ret
3:msr sctlr_el3, x0
4:ret
ASM_FUNCTION_REMOVE_IF_UNREFERENCED