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ArmPkg/ArmMonitorLib: Definition for ArmMonitorLib library class 

The ArmMonitorLib provides an abstract interface to issue
an HyperVisor Call (HVC) or System Monitor Call (SMC) depending
on the default conduit.
The PcdMonitorConduitHvc PCD allows to select the default conduit.

The new library relies on the ArmHvcLib and ArmSmcLib libraries.
A Null instance of these libraries can be used for the unused conduit.

Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
This commit is contained in:
Pierre Gondois 2022-10-28 17:32:42 +02:00 committed by mergify[bot]
parent dcf8c79056
commit 9a50990cdb
2 changed files with 47 additions and 0 deletions
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5
ArmPkg/ArmPkg.dec
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@ -71,6 +71,11 @@
#
ArmSvcLib|Include/Library/ArmSvcLib.h
## @libraryclass Provides a Monitor Call interface that will use the
# default conduit (HVC or SMC).
#
ArmMonitorLib|Include/Library/ArmMonitorLib.h
## @libraryclass Provides a default exception handler.
#
DefaultExceptionHandlerLib|Include/Library/DefaultExceptionHandlerLib.h

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ArmPkg/Include/Library/ArmMonitorLib.h Normal file
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@ -0,0 +1,42 @@
/** @file
Copyright (c) 2022, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef ARM_MONITOR_LIB_H_
#define ARM_MONITOR_LIB_H_
/** The size of the SMC arguments is different between AArch64 and AArch32.
The native size is used for the arguments.
It will be casted to either HVC or SMC args.
*/
typedef struct {
UINTN Arg0;
UINTN Arg1;
UINTN Arg2;
UINTN Arg3;
UINTN Arg4;
UINTN Arg5;
UINTN Arg6;
UINTN Arg7;
} ARM_MONITOR_ARGS;
/** Monitor call.
An HyperVisor Call (HVC) or System Monitor Call (SMC) will be issued
depending on the default conduit. PcdMonitorConduitHvc determines the type
of the call: if true, do an HVC.
@param [in,out] Args Arguments for the HVC/SMC.
**/
VOID
EFIAPI
ArmMonitorCall (
IN OUT ARM_MONITOR_ARGS *Args
);
#endif // ARM_MONITOR_LIB_H_