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ArmPkg: Add SMC helper functions 

Add functions ArmCallSmc0/1/2/3 to do SMC calls with 0, 1, 2 or 3
arguments.
The functions return up to 3 values.

Signed-off-by: Rebecca Cran <rebecca@nuviainc.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
This commit is contained in:
Rebecca Cran 2021-12-13 11:30:55 -07:00 committed by mergify[bot]
parent 7a6e6ae933
commit 4d30352445
4 changed files with 290 additions and 0 deletions
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73
ArmPkg/Include/Library/ArmSmcLib.h
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@ -1,5 +1,6 @@
/** @file
*
* Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
* Copyright (c) 2012-2014, ARM Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
@ -37,4 +38,76 @@ ArmCallSmc (
IN OUT ARM_SMC_ARGS *Args
);
/** Trigger an SMC call with 3 arguments.
@param Function The SMC function.
@param Arg1 Argument/result.
@param Arg2 Argument/result.
@param Arg3 Argument/result.
@return The SMC error code.
**/
UINTN
ArmCallSmc3 (
IN UINTN Function,
IN OUT UINTN *Arg1 OPTIONAL,
IN OUT UINTN *Arg2 OPTIONAL,
IN OUT UINTN *Arg3 OPTIONAL
);
/** Trigger an SMC call with 2 arguments.
@param Function The SMC function.
@param Arg1 Argument/result.
@param Arg2 Argument/result.
@param Arg3 Result.
@return The SMC error code.
**/
UINTN
ArmCallSmc2 (
IN UINTN Function,
IN OUT UINTN *Arg1 OPTIONAL,
IN OUT UINTN *Arg2 OPTIONAL,
OUT UINTN *Arg3 OPTIONAL
);
/** Trigger an SMC call with 1 argument.
@param Function The SMC function.
@param Arg1 Argument/result.
@param Arg2 Result.
@param Arg3 Result.
@return The SMC error code.
**/
UINTN
ArmCallSmc1 (
IN UINTN Function,
IN OUT UINTN *Arg1 OPTIONAL,
OUT UINTN *Arg2 OPTIONAL,
OUT UINTN *Arg3 OPTIONAL
);
/** Trigger an SMC call with 0 arguments.
@param Function The SMC function.
@param Arg1 Result.
@param Arg2 Result.
@param Arg3 Result.
@return The SMC error code.
**/
UINTN
ArmCallSmc0 (
IN UINTN Function,
OUT UINTN *Arg1 OPTIONAL,
OUT UINTN *Arg2 OPTIONAL,
OUT UINTN *Arg3 OPTIONAL
);
#endif // ARM_SMC_LIB_H_

129
ArmPkg/Library/ArmSmcLib/ArmSmc.c Normal file
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@ -0,0 +1,129 @@
/** @file
SMC helper functions.
Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/ArmSmcLib.h>
#include <Library/BaseMemoryLib.h>
/** Triggers an SMC call with 3 arguments.
@param Function The SMC function.
@param Arg1 Argument/result.
@param Arg2 Argument/result.
@param Arg3 Argument/result.
@return The SMC error code.
**/
UINTN
ArmCallSmc3 (
IN UINTN Function,
IN OUT UINTN *Arg1 OPTIONAL,
IN OUT UINTN *Arg2 OPTIONAL,
IN OUT UINTN *Arg3 OPTIONAL
)
{
ARM_SMC_ARGS Args;
UINTN ErrorCode;
ZeroMem (&Args, sizeof (ARM_SMC_ARGS));
Args.Arg0 = Function;
if (Arg1 != NULL) {
Args.Arg1 = *Arg1;
}
if (Arg2 != NULL) {
Args.Arg2 = *Arg2;
}
if (Arg3 != NULL) {
Args.Arg3 = *Arg3;
}
ArmCallSmc (&Args);
ErrorCode = Args.Arg0;
if (Arg1 != NULL) {
*Arg1 = Args.Arg1;
}
if (Arg2 != NULL) {
*Arg2 = Args.Arg2;
}
if (Arg3 != NULL) {
*Arg3 = Args.Arg3;
}
return ErrorCode;
}
/** Trigger an SMC call with 2 arguments.
@param Function The SMC function.
@param Arg1 Argument/result.
@param Arg2 Argument/result.
@param Arg3 Result.
@return The SMC error code.
**/
UINTN
ArmCallSmc2 (
IN UINTN Function,
IN OUT UINTN *Arg1 OPTIONAL,
IN OUT UINTN *Arg2 OPTIONAL,
OUT UINTN *Arg3 OPTIONAL
)
{
return ArmCallSmc3 (Function, Arg1, Arg2, Arg3);
}
/** Trigger an SMC call with 1 argument.
@param Function The SMC function.
@param Arg1 Argument/result.
@param Arg2 Result.
@param Arg3 Result.
@return The SMC error code.
**/
UINTN
ArmCallSmc1 (
IN UINTN Function,
IN OUT UINTN *Arg1 OPTIONAL,
OUT UINTN *Arg2 OPTIONAL,
OUT UINTN *Arg3 OPTIONAL
)
{
return ArmCallSmc3 (Function, Arg1, Arg2, Arg3);
}
/** Trigger an SMC call with 0 arguments.
@param Function The SMC function.
@param Arg1 Result.
@param Arg2 Result.
@param Arg3 Result.
@return The SMC error code.
**/
UINTN
ArmCallSmc0 (
IN UINTN Function,
OUT UINTN *Arg1 OPTIONAL,
OUT UINTN *Arg2 OPTIONAL,
OUT UINTN *Arg3 OPTIONAL
)
{
return ArmCallSmc3 (Function, Arg1, Arg2, Arg3);
}

3
ArmPkg/Library/ArmSmcLib/ArmSmcLib.inf
View File

@ -20,6 +20,9 @@
[Sources.AARCH64]
AArch64/ArmSmc.S
[Sources]
ArmSmc.c
[Packages]
MdePkg/MdePkg.dec
ArmPkg/ArmPkg.dec

85
ArmPkg/Library/ArmSmcLibNull/ArmSmcLibNull.c
View File

@ -1,4 +1,5 @@
//
// Copyright (c) 2021, NUVIA Inc. All rights reserved.
// Copyright (c) 2016, Linaro Limited. All rights reserved.
//
// SPDX-License-Identifier: BSD-2-Clause-Patent
@ -7,6 +8,7 @@
#include <Base.h>
#include <Library/ArmSmcLib.h>
#include <IndustryStandard/ArmStdSmc.h>
VOID
ArmCallSmc (
@ -14,3 +16,86 @@ ArmCallSmc (
)
{
}
/** Triggers an SMC call with 3 arguments.
@param Function The SMC function.
@param Arg1 Argument/result.
@param Arg2 Argument/result.
@param Arg3 Argument/result.
@return The SMC error code.
**/
UINTN
ArmCallSmc3 (
IN UINTN Function,
IN OUT UINTN *Arg1 OPTIONAL,
IN OUT UINTN *Arg2 OPTIONAL,
IN OUT UINTN *Arg3 OPTIONAL
)
{
return SMC_ARCH_CALL_NOT_SUPPORTED;
}
/** Trigger an SMC call with 2 arguments.
@param Function The SMC function.
@param Arg1 Argument/result.
@param Arg2 Argument/result.
@param Arg3 Result.
@return The SMC error code.
**/
UINTN
ArmCallSmc2 (
IN UINTN Function,
IN OUT UINTN *Arg1 OPTIONAL,
IN OUT UINTN *Arg2 OPTIONAL,
OUT UINTN *Arg3 OPTIONAL
)
{
return SMC_ARCH_CALL_NOT_SUPPORTED;
}
/** Trigger an SMC call with 1 argument.
@param Function The SMC function.
@param Arg1 Argument/result.
@param Arg2 Result.
@param Arg3 Result.
@return The SMC error code.
**/
UINTN
ArmCallSmc1 (
IN UINTN Function,
IN OUT UINTN *Arg1 OPTIONAL,
OUT UINTN *Arg2 OPTIONAL,
OUT UINTN *Arg3 OPTIONAL
)
{
return SMC_ARCH_CALL_NOT_SUPPORTED;
}
/** Trigger an SMC call with 0 arguments.
@param Function The SMC function.
@param Arg1 Result.
@param Arg2 Result.
@param Arg3 Result.
@return The SMC error code.
**/
UINTN
ArmCallSmc0 (
IN UINTN Function,
OUT UINTN *Arg1 OPTIONAL,
OUT UINTN *Arg2 OPTIONAL,
OUT UINTN *Arg3 OPTIONAL
)
{
return SMC_ARCH_CALL_NOT_SUPPORTED;
}