4d30352445
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>
130 lines
2.4 KiB
C
130 lines
2.4 KiB
C
/** @file
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SMC helper functions.
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Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/ArmSmcLib.h>
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#include <Library/BaseMemoryLib.h>
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/** Triggers an SMC call with 3 arguments.
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@param Function The SMC function.
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@param Arg1 Argument/result.
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@param Arg2 Argument/result.
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@param Arg3 Argument/result.
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@return The SMC error code.
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**/
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UINTN
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ArmCallSmc3 (
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IN UINTN Function,
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IN OUT UINTN *Arg1 OPTIONAL,
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IN OUT UINTN *Arg2 OPTIONAL,
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IN OUT UINTN *Arg3 OPTIONAL
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)
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{
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ARM_SMC_ARGS Args;
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UINTN ErrorCode;
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ZeroMem (&Args, sizeof (ARM_SMC_ARGS));
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Args.Arg0 = Function;
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if (Arg1 != NULL) {
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Args.Arg1 = *Arg1;
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}
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if (Arg2 != NULL) {
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Args.Arg2 = *Arg2;
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}
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if (Arg3 != NULL) {
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Args.Arg3 = *Arg3;
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}
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ArmCallSmc (&Args);
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ErrorCode = Args.Arg0;
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if (Arg1 != NULL) {
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*Arg1 = Args.Arg1;
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}
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if (Arg2 != NULL) {
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*Arg2 = Args.Arg2;
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}
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if (Arg3 != NULL) {
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*Arg3 = Args.Arg3;
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}
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return ErrorCode;
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}
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/** Trigger an SMC call with 2 arguments.
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@param Function The SMC function.
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@param Arg1 Argument/result.
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@param Arg2 Argument/result.
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@param Arg3 Result.
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@return The SMC error code.
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**/
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UINTN
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ArmCallSmc2 (
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IN UINTN Function,
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IN OUT UINTN *Arg1 OPTIONAL,
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IN OUT UINTN *Arg2 OPTIONAL,
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OUT UINTN *Arg3 OPTIONAL
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)
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{
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return ArmCallSmc3 (Function, Arg1, Arg2, Arg3);
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}
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/** Trigger an SMC call with 1 argument.
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@param Function The SMC function.
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@param Arg1 Argument/result.
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@param Arg2 Result.
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@param Arg3 Result.
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@return The SMC error code.
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**/
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UINTN
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ArmCallSmc1 (
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IN UINTN Function,
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IN OUT UINTN *Arg1 OPTIONAL,
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OUT UINTN *Arg2 OPTIONAL,
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OUT UINTN *Arg3 OPTIONAL
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)
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{
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return ArmCallSmc3 (Function, Arg1, Arg2, Arg3);
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}
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/** Trigger an SMC call with 0 arguments.
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@param Function The SMC function.
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@param Arg1 Result.
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@param Arg2 Result.
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@param Arg3 Result.
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@return The SMC error code.
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**/
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UINTN
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ArmCallSmc0 (
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IN UINTN Function,
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OUT UINTN *Arg1 OPTIONAL,
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OUT UINTN *Arg2 OPTIONAL,
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OUT UINTN *Arg3 OPTIONAL
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)
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{
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return ArmCallSmc3 (Function, Arg1, Arg2, Arg3);
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}
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