mirror of https://github.com/acidanthera/audk.git
11b5093ce4
According to "SMC Calling Convention" specification, section 7.4, return value of Arm Architecture Calls is stored at first argument of SMC aguments (ARM_SMC_ARGS). This value can be negative values indicating error or positive values (including zero) indicating success. Positive value would contain information of respective Function ID (Section 7.3.4 and 7.4.4). For that reason, "SMCCC_VERSION" and "SMCCC_ARCH_FEATURES" Function ID calls read return value from "SmcCallStatus" variable (Args.Arg0 - first argument of SMC call). But "SMCCC_ARCH_SOC_ID" Function ID call is reading return value from "SmcParam" variable (Args.Arg1 - second argument of SMC call) so it leads to unexpected results of "Jep106Code" and "SocRevision". This patch is to correct it. Signed-off-by: Nhi Pham <nhi@os.amperecomputing.com> Reviewed-by: Rebecca Cran <rebecca@quicinc.com> Reviewed-by: Sami Mujawar <sami.mujawar@arm.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Leif Lindholm <quic_llindhol@quicinc.com> |
||
|---|---|---|
| .. | ||
| Drivers | ||
| Filesystem/SemihostFs | ||
| Include | ||
| Library | ||
| Universal/Smbios | ||
| ArmPkg.ci.yaml | ||
| ArmPkg.dec | ||
| ArmPkg.dsc | ||