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 <[email protected]> --- ArmPkg/Include/Library/ArmLib.h | 6 ++++++ ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S | 4 ++++ ArmPkg/Library/ArmLib/Arm/ArmLibSupport.asm | 3 +++ 3 files changed, 13 insertions(+) diff --git a/ArmPkg/Include/Library/ArmLib.h b/ArmPkg/Include/Library/ArmLib.h index 24e84c7a1965..ffda50e9d767 100644 --- a/ArmPkg/Include/Library/ArmLib.h +++ b/ArmPkg/Include/Library/ArmLib.h @@ -558,6 +558,12 @@ ArmReadSctlr ( VOID ); +VOID +EFIAPI +ArmWriteSctlr ( + IN UINT32 Value + ); + UINTN EFIAPI ArmReadHVBar ( diff --git a/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S b/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S index a0b5ed500298..149b57e059ee 100644 --- a/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S +++ b/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.S @@ -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 diff --git a/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.asm b/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.asm index 85b0feee20d4..219140c22b13 100644 --- a/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.asm +++ b/ArmPkg/Library/ArmLib/Arm/ArmLibSupport.asm @@ -155,6 +155,9 @@ mrc p15, 0, r0, c1, c0, 0 // Read SCTLR into R0 (Read control register configuration data) bx lr + RVCT_ASM_EXPORT ArmWriteSctlr + mcr p15, 0, r0, c1, c0, 0 + bx lr RVCT_ASM_EXPORT ArmReadCpuActlr mrc p15, 0, r0, c1, c0, 1 -- 2.15.1 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
