diff options
| author | Rebecca Cran <rebecca@nuviainc.com> | 2021-12-13 11:30:55 -0700 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-12-14 11:30:26 +0000 |
| commit | 4d303524451d87d411c972736015138a8a4f03f6 (patch) | |
| tree | a266cd1f4a9ba9361734d9c7be3a604464e0896c /ArmPkg/Library/ArmSmcLib | |
| parent | 7a6e6ae9332614d386446d2a73e34b74fe66446f (diff) | |
| download | edk2-4d303524451d87d411c972736015138a8a4f03f6.tar.gz | |
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>
Diffstat (limited to 'ArmPkg/Library/ArmSmcLib')
| -rw-r--r-- | ArmPkg/Library/ArmSmcLib/ArmSmc.c | 129 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmSmcLib/ArmSmcLib.inf | 3 |
2 files changed, 132 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmSmcLib/ArmSmc.c b/ArmPkg/Library/ArmSmcLib/ArmSmc.c new file mode 100644 index 0000000000..254507e219 --- /dev/null +++ b/ArmPkg/Library/ArmSmcLib/ArmSmc.c @@ -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);
+}
diff --git a/ArmPkg/Library/ArmSmcLib/ArmSmcLib.inf b/ArmPkg/Library/ArmSmcLib/ArmSmcLib.inf index 4f4b09f452..a89f9203fb 100644 --- a/ArmPkg/Library/ArmSmcLib/ArmSmcLib.inf +++ b/ArmPkg/Library/ArmSmcLib/ArmSmcLib.inf @@ -20,6 +20,9 @@ [Sources.AARCH64]
AArch64/ArmSmc.S
+[Sources]
+ ArmSmc.c
+
[Packages]
MdePkg/MdePkg.dec
ArmPkg/ArmPkg.dec
|