> -----Original Message-----
> From: Kinney, Michael D [mailto:michael.d.kin...@intel.com]
> Sent: Wednesday, June 3, 2020 6:00 AM
> To: devel@edk2.groups.io; Schaefer, Daniel (DualStudy)
> <daniel.schae...@hpe.com>; Kinney, Michael D
> <michael.d.kin...@intel.com>
> Cc: Leif Lindholm <l...@nuviainc.com>; Chen, Gilbert
> <gilbert.c...@hpe.com>; Chang, Abner (HPS SW/FW Technologist)
> <abner.ch...@hpe.com>
> Subject: RE: [edk2-devel] [PATCH v4 1/1] ProcessorPkg/Library: Add
> RiscVEdk2SbiLib
>
> Hi Daniel,
>
> I see some inconsistence in the names used in these patches.
>
> For example, there should not be a need to use "Edk2" in the
> name of a library. This library is in an edk2 repo.
We currently have two libraries regards to RISC-V SBI spec. One is the wrapper
to build OpenSBI lib, which is RiscVOpenSbiLib.
Another one is SBI firmware code base extension in which the ABIs are provided
by system firmware other than the standard ABIs defined in SBI spec. To name it
with EDK2 makes sense because that is RISC-V EDK2 firmware code base SBI
extension.
>
> I see "RiscV" and "Risk-V" used in file paths. I recommend
> you pick one and use it consistently. In the MdePkg, I see
> RiscV64, and macros using RISCV, RISCV32, RISCV64, and RISCV128.
> which seems consistent and does not use a '-'. Perhaps use
> "RiscV" for content that works for 32, 64, and 128 bit and
> RiscV32, RiscV64, and RiskV128 for content is specific to the
> bit width?
For the folders under Silicon and platform, I prefer to use "RISC-V" which is
the official name of this processor. All other files can use RiscV which
conform the naming rule. RISCV32, RISCV64, and RISCV128 are used for the
architectures.
>
> Thanks,
>
> Mike
>
> > -----Original Message-----
> > From: devel@edk2.groups.io <devel@edk2.groups.io> On
> > Behalf Of Daniel Schaefer
> > Sent: Tuesday, June 2, 2020 9:52 AM
> > To: devel@edk2.groups.io
> > Cc: Leif Lindholm <l...@nuviainc.com>; Gilbert Chen
> > <gilbert.c...@hpe.com>; Abner Chang
> > <abner.ch...@hpe.com>; Kinney, Michael D
> > <michael.d.kin...@intel.com>
> > Subject: [edk2-devel] [PATCH v4 1/1]
> > ProcessorPkg/Library: Add RiscVEdk2SbiLib
> >
> > Library provides interfaces to invoke SBI ecalls.
> >
> > Signed-off-by: Daniel Schaefer <daniel.schae...@hpe.com>
> >
> > Cc: Leif Lindholm <l...@nuviainc.com>
> > Cc: Gilbert Chen <gilbert.c...@hpe.com>
> > Cc: Abner Chang <abner.ch...@hpe.com>
> > Cc: Michael D. Kinney <michael.d.kin...@intel.com>
> > ---
> > Silicon/RISC-
> > V/ProcessorPkg/Library/RiscVEdk2SbiLib/RiscVEdk2SbiLib.i
> > nf | 28 +
> > Silicon/RISC-
> > V/ProcessorPkg/Include/Library/RiscVEdk2SbiLib.h
> > | 563 ++++++++++++
> > Silicon/RISC-
> > V/ProcessorPkg/Library/RiscVEdk2SbiLib/RiscVEdk2SbiLib.c
> > | 897 ++++++++++++++++++++
> > 3 files changed, 1488 insertions(+)
> >
> > diff --git a/Silicon/RISC-
> > V/ProcessorPkg/Library/RiscVEdk2SbiLib/RiscVEdk2SbiLib.i
> > nf b/Silicon/RISC-
> > V/ProcessorPkg/Library/RiscVEdk2SbiLib/RiscVEdk2SbiLib.i
> > nf
> > new file mode 100644
> > index 000000000000..665dcbf40e01
> > --- /dev/null
> > +++ b/Silicon/RISC-
> > V/ProcessorPkg/Library/RiscVEdk2SbiLib/RiscVEdk2SbiLib.i
> > nf
> > @@ -0,0 +1,28 @@
> > +## @file
> >
> >
> > +# RISC-V Library to call SBI ecalls
> >
> >
> > +#
> >
> >
> > +# Copyright (c) 2020, Hewlett Packard Enterprise
> > Development LP. All rights reserved.<BR>
> >
> >
> > +#
> >
> >
> > +# SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> >
> > +#
> >
> >
> > +##
> >
> >
> > +
> >
> >
> > +[Defines]
> >
> >
> > + INF_VERSION = 0x0001001b
> >
> >
> > + BASE_NAME = RiscVEdk2SbiLib
> >
> >
> > + FILE_GUID = 0DF1BBBD-F7E5-4E8A-BCF1-9D63D2DD9FDD
> >
> >
> > + MODULE_TYPE = BASE
> >
> >
> > + VERSION_STRING = 1.0
> >
> >
> > + LIBRARY_CLASS = RiscVEdk2SbiLib
> >
> >
> > +
> >
> >
> > +[Sources]
> >
> >
> > + RiscVEdk2SbiLib.c
> >
> >
> > +
> >
> >
> > +[Packages]
> >
> >
> > + MdePkg/MdePkg.dec
> >
> >
> > + Silicon/RISC-V/ProcessorPkg/RiscVProcessorPkg.dec
> >
> >
> > + Platform/RISC-V/PlatformPkg/RiscVPlatformPkg.dec
> >
> >
> > +
> >
> >
> > +[LibraryClasses]
> >
> >
> > + BaseLib
> >
> >
> > + RiscVOpensbiLib
> >
> >
> > diff --git a/Silicon/RISC-
> > V/ProcessorPkg/Include/Library/RiscVEdk2SbiLib.h
> > b/Silicon/RISC-
> > V/ProcessorPkg/Include/Library/RiscVEdk2SbiLib.h
> > new file mode 100644
> > index 000000000000..c1ae3176147f
> > --- /dev/null
> > +++ b/Silicon/RISC-
> > V/ProcessorPkg/Include/Library/RiscVEdk2SbiLib.h
> > @@ -0,0 +1,563 @@
> > +/** @file
> >
> >
> > + Library to call the RISC-V SBI ecalls
> >
> >
> > +
> >
> >
> > + Copyright (c) 2020, Hewlett Packard Development LP.
> > All rights reserved.<BR>
> >
> >
> > +
> >
> >
> > + SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> >
> > +
> >
> >
> > + @par Glossary:
> >
> >
> > + - Hart - Hardware Thread, similar to a CPU core
> >
> >
> > +**/
> >
> >
> > +
> >
> >
> > +#ifndef RISCV_SBI_LIB_H_
> >
> >
> > +#define RISCV_SBI_LIB_H_
> >
> >
> > +
> >
> >
> > +#include <Uefi.h>
> >
> >
> > +#include <IndustryStandard/RiscVOpensbi.h>
> >
> >
> > +#include <sbi/sbi_scratch.h>
> >
> >
> > +#include <sbi/sbi_platform.h>
> >
> >
> > +
> >
> >
> > +//
> >
> >
> > +// EDK2 OpenSBI Firmware extension.
> >
> >
> > +//
> >
> >
> > +#define SBI_EDK2_FW_EXT
> > (SBI_EXT_FIRMWARE_CODE_BASE_START | SBI_OPENSBI_IMPID)
> >
> >
> > +//
> >
> >
> > +// EDK2 OpenSBI Firmware extension functions.
> >
> >
> > +//
> >
> >
> > +#define SBI_EXT_FW_MSCRATCH_FUNC 0
> >
> >
> > +#define SBI_EXT_FW_MSCRATCH_HARTID_FUNC 1
> >
> >
> > +
> >
> >
> > +//
> >
> >
> > +// EDK2 OpenSBI firmware extension return status.
> >
> >
> > +//
> >
> >
> > +typedef struct {
> >
> >
> > + UINTN Error; ///< SBI status code
> >
> >
> > + UINTN Value; ///< Value returned
> >
> >
> > +} SbiRet;
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the implemented SBI specification version
> >
> >
> > +
> >
> >
> > + The minor number of the SBI specification is encoded
> > in the low 24 bits,
> >
> >
> > + with the major number encoded in the next 7 bits.
> > Bit 32 must be 0 and is
> >
> >
> > + reserved for future expansion.
> >
> >
> > +
> >
> >
> > + @param[out] SpecVersion The Version of the
> > SBI specification.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetSpecVersion (
> >
> >
> > + OUT UINTN *SpecVersion
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the SBI implementation ID
> >
> >
> > +
> >
> >
> > + This ID is used to idenetify a specific SBI
> > implementation in order to work
> >
> >
> > + around any quirks it might have.
> >
> >
> > +
> >
> >
> > + @param[out] ImplId The ID of the SBI
> > implementation.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetImplId (
> >
> >
> > + OUT UINTN *ImplId
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the SBI implementation version
> >
> >
> > +
> >
> >
> > + The version of this SBI implementation.
> >
> >
> > + The encoding of this number is determined by the
> > specific SBI implementation.
> >
> >
> > +
> >
> >
> > + @param[out] ImplVersion The version of the
> > SBI implementation.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetImplVersion (
> >
> >
> > + OUT UINTN *ImplVersion
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Probe whether an SBI extension is available
> >
> >
> > +
> >
> >
> > + ProbeResult is set to 0 if the extension is not
> > available or to an extension
> >
> >
> > + specified value if it is available.
> >
> >
> > +
> >
> >
> > + @param[in] ExtensionId The extension ID.
> >
> >
> > + @param[out] ProbeResult The return value of
> > the probe.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiProbeExtension (
> >
> >
> > + IN INTN ExtensionId,
> >
> >
> > + OUT INTN *ProbeResult
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the CPU's vendor ID
> >
> >
> > +
> >
> >
> > + Reads the mvendorid CSR.
> >
> >
> > +
> >
> >
> > + @param[out] MachineVendorId The CPU's vendor ID.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMachineVendorId (
> >
> >
> > + OUT UINTN *MachineVendorId
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the CPU's architecture ID
> >
> >
> > +
> >
> >
> > + Reads the marchid CSR.
> >
> >
> > +
> >
> >
> > + @param[out] MachineArchId The CPU's
> > architecture ID.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMachineArchId (
> >
> >
> > + OUT UINTN *MachineArchId
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the CPU's implementation ID
> >
> >
> > +
> >
> >
> > + Reads the mimpid CSR.
> >
> >
> > +
> >
> >
> > + @param[out] MachineImplId The CPU's
> > implementation ID.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMachineImplId (
> >
> >
> > + OUT UINTN *MachineImplId
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Politely ask the SBI to start a given hart.
> >
> >
> > +
> >
> >
> > + This call may return before the hart has actually
> > started executing, if the
> >
> >
> > + SBI implementation can guarantee that the hart is
> > actually going to start.
> >
> >
> > +
> >
> >
> > + Before the hart jumps to StartAddr, the hart MUST
> > configure PMP if present
> >
> >
> > + and switch to S-mode.
> >
> >
> > +
> >
> >
> > + @param[in] HartId The id of the hart
> > to start.
> >
> >
> > + @param[in] StartAddr The physical
> > address, where the hart starts
> >
> >
> > + executing from.
> >
> >
> > + @param[in] Priv An XLEN-bit value,
> > which will be in register
> >
> >
> > + a1 when the hart
> > starts.
> >
> >
> > + @retval EFI_SUCCESS Hart was stopped and
> > will start executing from StartAddr.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr is not
> > valid, possibly due to following reasons:
> >
> >
> > + - It is not a valid
> > physical address.
> >
> >
> > + - The address is
> > prohibited by PMP to run in
> >
> >
> > + supervisor mode.
> >
> >
> > + @retval EFI_INVALID_PARAMETER HartId is not a
> > valid hart id
> >
> >
> > + @retval EFI_ALREADY_STARTED The hart is already
> > running.
> >
> >
> > + @retval other The start request
> > failed for unknown reasons.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiHartStart (
> >
> >
> > + IN UINTN HartId,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Priv
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Return execution of the calling hart to SBI.
> >
> >
> > +
> >
> >
> > + MUST be called in S-Mode with user interrupts
> > disabled.
> >
> >
> > + This call is not expected to return, unless a failure
> > occurs.
> >
> >
> > +
> >
> >
> > + @retval EFI_SUCCESS Never occurs. When
> > successful, the call does not return.
> >
> >
> > + @retval other Failed to stop hard
> > for an unknown reason.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiHartStop (
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the current status of a hart.
> >
> >
> > +
> >
> >
> > + Since harts can transition between states at any
> > time, the status retrieved
> >
> >
> > + by this function may already be out of date, once it
> > returns.
> >
> >
> > +
> >
> >
> > + Possible values for HartStatus are:
> >
> >
> > + 0: STARTED
> >
> >
> > + 1: STOPPED
> >
> >
> > + 2: START_REQUEST_PENDING
> >
> >
> > + 3: STOP_REQUEST_PENDING
> >
> >
> > +
> >
> >
> > + @param[out] HartStatus The pointer in which
> > the hart's status is
> >
> >
> > + stored.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > + @retval EFI_INVALID_PARAMETER A parameter is
> > invalid.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiHartGetStatus (
> >
> >
> > + IN UINTN HartId,
> >
> >
> > + OUT UINTN *HartStatus
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +///
> >
> >
> > +/// Timer extension
> >
> >
> > +///
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Clear pending timer interrupt bit and set timer for
> > next event after Time.
> >
> >
> > +
> >
> >
> > + To clear the timer without scheduling a timer event,
> > set Time to a
> >
> >
> > + practically infinite value or mask the timer
> > interrupt by clearing sie.STIE.
> >
> >
> > +
> >
> >
> > + @param[in] Time The time offset to
> > the next scheduled timer interrupt.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiSetTimer (
> >
> >
> > + IN UINT64 Time
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +///
> >
> >
> > +/// IPI extension
> >
> >
> > +///
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Send IPI to all harts specified in the mask.
> >
> >
> > +
> >
> >
> > + The interrupts are registered as supervisor software
> > interrupts at the
> >
> >
> > + receiving hart.
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiSendIpi (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +///
> >
> >
> > +/// Remote fence extension
> >
> >
> > +///
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs remote harts to execute a FENCE.I
> > instruction.
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteFenceI (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.VMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.VMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteSfenceVma (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.VMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.VMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + Covers only the given ASID.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteSfenceVmaAsid (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size,
> >
> >
> > + IN UINTN Asid
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.GVMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.GVMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + Covers only the given VMID.
> >
> >
> > + This function call is only valid for harts
> > implementing the hypervisor extension.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_UNSUPPORTED SBI does not
> > implement this function or one
> >
> >
> > + of the target harts
> > does not support the
> >
> >
> > + hypervisor
> > extension.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteHfenceGvmaVmid (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size,
> >
> >
> > + IN UINTN Vmid
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.GVMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.GVMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + This function call is only valid for harts
> > implementing the hypervisor extension.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_UNSUPPORTED SBI does not
> > implement this function or one
> >
> >
> > + of the target harts
> > does not support the
> >
> >
> > + hypervisor
> > extension.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteHfenceGvma (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.VVMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.GVMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + Covers only the given ASID.
> >
> >
> > + This function call is only valid for harts
> > implementing the hypervisor extension.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_UNSUPPORTED SBI does not
> > implement this function or one
> >
> >
> > + of the target harts
> > does not support the
> >
> >
> > + hypervisor
> > extension.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteHfenceVvmaAsid (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size,
> >
> >
> > + IN UINTN Asid
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.VVMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.GVMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + This function call is only valid for harts
> > implementing the hypervisor extension.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_UNSUPPORTED SBI does not
> > implement this function or one
> >
> >
> > + of the target harts
> > does not support the
> >
> >
> > + hypervisor
> > extension.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteHfenceVvma (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +///
> >
> >
> > +/// Vendor Specific extension space: Extension Ids
> > 0x09000000 through 0x09FFFFFF
> >
> >
> > +///
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Call a function in a vendor defined SBI extension
> >
> >
> > +
> >
> >
> > + ASSERT() if the ExtensionId is not in the designated
> > SBI Vendor Extension
> >
> >
> > + Space.
> >
> >
> > +
> >
> >
> > + @param[in] ExtensionId The SBI vendor
> > extension ID.
> >
> >
> > + @param[in] FunctionId The function ID to
> > call in this extension.
> >
> >
> > + @param[in] NumArgs How many arguments
> > are passed.
> >
> >
> > + @param[in] ... Actual Arguments to
> > the function.
> >
> >
> > + @retval EFI_SUCCESS if the SBI function was called
> > and it was successful
> >
> >
> > + @retval EFI_INVALID_PARAMETER if NumArgs exceeds 6
> >
> >
> > + @retval others if the called SBI function returns an
> > error
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiVendorCall (
> >
> >
> > + IN UINTN ExtensionId,
> >
> >
> > + IN UINTN FunctionId,
> >
> >
> > + IN UINTN NumArgs,
> >
> >
> > + ...
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +///
> >
> >
> > +/// Firmware SBI Extension
> >
> >
> > +///
> >
> >
> > +/// This SBI Extension is defined and used by EDK2 only
> > in order to be able to
> >
> >
> > +/// run PI and DXE phase in S-Mode.
> >
> >
> > +///
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get scratch space of the current hart.
> >
> >
> > +
> >
> >
> > + Please consider using the wrapper
> > SbiGetFirmwareContext if you only need to
> >
> >
> > + access the firmware context.
> >
> >
> > +
> >
> >
> > + @param[out] ScratchSpace The scratch space
> > pointer.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMscratch (
> >
> >
> > + OUT SBI_SCRATCH **ScratchSpace
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get scratch space of the given hart id.
> >
> >
> > +
> >
> >
> > + @param[in] HartId The hart id.
> >
> >
> > + @param[out] ScratchSpace The scratch space
> > pointer.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMscratchHartid (
> >
> >
> > + IN UINTN HartId,
> >
> >
> > + OUT SBI_SCRATCH **ScratchSpace
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get firmware context of the calling hart.
> >
> >
> > +
> >
> >
> > + @param[out] FirmwareContext The firmware context
> > pointer.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetFirmwareContext (
> >
> >
> > + OUT EFI_RISCV_OPENSBI_FIRMWARE_CONTEXT
> > **FirmwareContext
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Set firmware context of the calling hart.
> >
> >
> > +
> >
> >
> > + @param[in] FirmwareContext The firmware context
> > pointer.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiSetFirmwareContext (
> >
> >
> > + IN EFI_RISCV_OPENSBI_FIRMWARE_CONTEXT
> > *FirmwareContext
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > +#endif
> >
> >
> > diff --git a/Silicon/RISC-
> > V/ProcessorPkg/Library/RiscVEdk2SbiLib/RiscVEdk2SbiLib.c
> > b/Silicon/RISC-
> > V/ProcessorPkg/Library/RiscVEdk2SbiLib/RiscVEdk2SbiLib.c
> > new file mode 100644
> > index 000000000000..0df505d2675b
> > --- /dev/null
> > +++ b/Silicon/RISC-
> > V/ProcessorPkg/Library/RiscVEdk2SbiLib/RiscVEdk2SbiLib.c
> > @@ -0,0 +1,897 @@
> > +/** @file
> >
> >
> > + Instance of the SBI ecall library.
> >
> >
> > +
> >
> >
> > + It allows calling an SBI function via an ecall from
> > S-Mode.
> >
> >
> > +
> >
> >
> > + The legacy extensions are not included because they
> > are not necessary.
> >
> >
> > + They would be:
> >
> >
> > + - SbiLegacySetTimer -> Use SbiSetTimer
> >
> >
> > + - SbiLegacyConsolePutChar -> No replacement -
> > Use regular UEFI functions
> >
> >
> > + - SbiLegacyConsoleGetChar -> No replacement -
> > Use regular UEFI functions
> >
> >
> > + - SbiLegacyClearIpi -> Write 0 to SSIP
> >
> >
> > + - SbiLegacySendIpi -> Use SbiSendIpi
> >
> >
> > + - SbiLegacyRemoteFenceI -> Use SbiRemoteFenceI
> >
> >
> > + - SbiLegacyRemoteSfenceVma -> Use
> > SbiRemoteSfenceVma
> >
> >
> > + - SbiLegacyRemoteSfenceVmaAsid -> Use
> > SbiRemoteSfenceVmaAsid
> >
> >
> > + - SbiLegacyShutdown -> Wait for new System
> > Reset extension
> >
> >
> > +
> >
> >
> > + Copyright (c) 2020, Hewlett Packard Development LP.
> > All rights reserved.<BR>
> >
> >
> > + SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> >
> > +
> >
> >
> > + @par Revision Reference:
> >
> >
> > + - OpenSBI Version 0.6
> >
> >
> > +**/
> >
> >
> > +
> >
> >
> > +#include <IndustryStandard/RiscVOpensbi.h>
> >
> >
> > +#include <Library/BaseMemoryLib.h>
> >
> >
> > +#include <Library/DebugLib.h>
> >
> >
> > +#include <Library/RiscVEdk2SbiLib.h>
> >
> >
> > +#include <sbi/riscv_asm.h>
> >
> >
> > +#include <sbi/sbi_hart.h>
> >
> >
> > +#include <sbi/sbi_types.h>
> >
> >
> > +#include <sbi/sbi_init.h>
> >
> >
> > +
> >
> >
> > +
> >
> >
> > +//
> >
> >
> > +// Maximum arguments for SBI ecall
> >
> >
> > +// It's possible to pass more but no SBI call uses more
> > as of SBI 0.2.
> >
> >
> > +// The additional arguments would have to be passed on
> > the stack instead of as
> >
> >
> > +// registers, like it's done now.
> >
> >
> > +//
> >
> >
> > +#define SBI_CALL_MAX_ARGS 6
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Call SBI call using ecall instruction.
> >
> >
> > +
> >
> >
> > + Asserts when NumArgs exceeds SBI_CALL_MAX_ARGS.
> >
> >
> > +
> >
> >
> > + @param[in] ExtId SBI extension ID.
> >
> >
> > + @param[in] FuncId SBI function ID.
> >
> >
> > + @param[in] NumArgs Number of arguments to pass to
> > the ecall.
> >
> >
> > + @param[in] ... Argument list for the ecall.
> >
> >
> > +
> >
> >
> > + @retval Returns SbiRet structure with value and
> > error code.
> >
> >
> > +
> >
> >
> > +**/
> >
> >
> > +STATIC
> >
> >
> > +SbiRet
> >
> >
> > +EFIAPI
> >
> >
> > +SbiCall(
> >
> >
> > + IN UINTN ExtId,
> >
> >
> > + IN UINTN FuncId,
> >
> >
> > + IN UINTN NumArgs,
> >
> >
> > + ...
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + UINTN I;
> >
> >
> > + SbiRet Ret;
> >
> >
> > + UINTN Args[SBI_CALL_MAX_ARGS];
> >
> >
> > + VA_LIST ArgList;
> >
> >
> > + VA_START (ArgList, NumArgs);
> >
> >
> > +
> >
> >
> > + ASSERT (NumArgs <= SBI_CALL_MAX_ARGS);
> >
> >
> > +
> >
> >
> > + for (I = 0; I < SBI_CALL_MAX_ARGS; I++) {
> >
> >
> > + if (I < NumArgs) {
> >
> >
> > + Args[I] = VA_ARG (ArgList, UINTN);
> >
> >
> > + } else {
> >
> >
> > + // Default to 0 for all arguments that are not
> > given
> >
> >
> > + Args[I] = 0;
> >
> >
> > + }
> >
> >
> > + }
> >
> >
> > +
> >
> >
> > + VA_END(ArgList);
> >
> >
> > +
> >
> >
> > + register UINTN a0 asm ("a0") = Args[0];
> >
> >
> > + register UINTN a1 asm ("a1") = Args[1];
> >
> >
> > + register UINTN a2 asm ("a2") = Args[2];
> >
> >
> > + register UINTN a3 asm ("a3") = Args[3];
> >
> >
> > + register UINTN a4 asm ("a4") = Args[4];
> >
> >
> > + register UINTN a5 asm ("a5") = Args[5];
> >
> >
> > + register UINTN a6 asm ("a6") = (UINTN)(FuncId);
> >
> >
> > + register UINTN a7 asm ("a7") = (UINTN)(ExtId);
> >
> >
> > + asm volatile ("ecall" \
> >
> >
> > + : "+r" (a0), "+r" (a1) \
> >
> >
> > + : "r" (a2), "r" (a3), "r" (a4), "r" (a5), "r"
> > (a6), "r" (a7) \
> >
> >
> > + : "memory"); \
> >
> >
> > + Ret.Error = a0;
> >
> >
> > + Ret.Value = a1;
> >
> >
> > + return Ret;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Translate SBI error code to EFI status.
> >
> >
> > +
> >
> >
> > + @param[in] SbiError SBI error code
> >
> >
> > + @retval EFI_STATUS
> >
> >
> > +**/
> >
> >
> > +
> >
> >
> > +STATIC
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +TranslateError(
> >
> >
> > + IN UINTN SbiError
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + switch (SbiError) {
> >
> >
> > + case SBI_SUCCESS:
> >
> >
> > + return EFI_SUCCESS;
> >
> >
> > + case SBI_ERR_FAILED:
> >
> >
> > + return EFI_DEVICE_ERROR;
> >
> >
> > + break;
> >
> >
> > + case SBI_ERR_NOT_SUPPORTED:
> >
> >
> > + return EFI_UNSUPPORTED;
> >
> >
> > + break;
> >
> >
> > + case SBI_ERR_INVALID_PARAM:
> >
> >
> > + return EFI_INVALID_PARAMETER;
> >
> >
> > + break;
> >
> >
> > + case SBI_ERR_DENIED:
> >
> >
> > + return EFI_ACCESS_DENIED;
> >
> >
> > + break;
> >
> >
> > + case SBI_ERR_INVALID_ADDRESS:
> >
> >
> > + return EFI_LOAD_ERROR;
> >
> >
> > + break;
> >
> >
> > + case SBI_ERR_ALREADY_AVAILABLE:
> >
> >
> > + return EFI_ALREADY_STARTED;
> >
> >
> > + break;
> >
> >
> > + default:
> >
> >
> > + //
> >
> >
> > + // Reaches here only if SBI has defined a new
> > error type
> >
> >
> > + //
> >
> >
> > + ASSERT (FALSE);
> >
> >
> > + return EFI_UNSUPPORTED;
> >
> >
> > + break;
> >
> >
> > + }
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +//
> >
> >
> > +// OpenSBI library interface function for the base
> > extension
> >
> >
> > +//
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the implemented SBI specification version
> >
> >
> > +
> >
> >
> > + The minor number of the SBI specification is encoded
> > in the low 24 bits,
> >
> >
> > + with the major number encoded in the next 7 bits.
> > Bit 32 must be 0 and is
> >
> >
> > + reserved for future expansion.
> >
> >
> > +
> >
> >
> > + @param[out] SpecVersion The Version of the
> > SBI specification.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetSpecVersion (
> >
> >
> > + OUT UINTN *SpecVersion
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EXT_BASE,
> > SBI_EXT_BASE_GET_SPEC_VERSION, 0);
> >
> >
> > +
> >
> >
> > + if (!Ret.Error) {
> >
> >
> > + *SpecVersion = (UINTN)Ret.Value;
> >
> >
> > + }
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the SBI implementation ID
> >
> >
> > +
> >
> >
> > + This ID is used to idenetify a specific SBI
> > implementation in order to work
> >
> >
> > + around any quirks it might have.
> >
> >
> > +
> >
> >
> > + @param[out] ImplId The ID of the SBI
> > implementation.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetImplId (
> >
> >
> > + OUT UINTN *ImplId
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EXT_BASE,
> > SBI_EXT_BASE_GET_IMP_ID, 0);
> >
> >
> > + *ImplId = (UINTN)Ret.Value;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the SBI implementation version
> >
> >
> > +
> >
> >
> > + The version of this SBI implementation.
> >
> >
> > + The encoding of this number is determined by the
> > specific SBI implementation.
> >
> >
> > +
> >
> >
> > + @param[out] ImplVersion The version of the
> > SBI implementation.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetImplVersion (
> >
> >
> > + OUT UINTN *ImplVersion
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EXT_BASE,
> > SBI_EXT_BASE_GET_IMP_VERSION, 0);
> >
> >
> > + *ImplVersion = (UINTN)Ret.Value;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Probe whether an SBI extension is available
> >
> >
> > +
> >
> >
> > + ProbeResult is set to 0 if the extension is not
> > available or to an extension
> >
> >
> > + specified value if it is available.
> >
> >
> > +
> >
> >
> > + @param[in] ExtensionId The extension ID.
> >
> >
> > + @param[out] ProbeResult The return value of
> > the probe.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiProbeExtension (
> >
> >
> > + IN INTN ExtensionId,
> >
> >
> > + OUT INTN *ProbeResult
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EXT_BASE,
> > SBI_EXT_BASE_PROBE_EXT, 0);
> >
> >
> > + *ProbeResult = (UINTN)Ret.Value;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the CPU's vendor ID
> >
> >
> > +
> >
> >
> > + Reads the mvendorid CSR.
> >
> >
> > +
> >
> >
> > + @param[out] MachineVendorId The CPU's vendor ID.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMachineVendorId (
> >
> >
> > + OUT UINTN *MachineVendorId
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EXT_BASE,
> > SBI_EXT_BASE_GET_MVENDORID, 0);
> >
> >
> > + *MachineVendorId = (UINTN)Ret.Value;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the CPU's architecture ID
> >
> >
> > +
> >
> >
> > + Reads the marchid CSR.
> >
> >
> > +
> >
> >
> > + @param[out] MachineArchId The CPU's
> > architecture ID.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMachineArchId (
> >
> >
> > + OUT UINTN *MachineArchId
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EXT_BASE,
> > SBI_EXT_BASE_GET_MARCHID, 0);
> >
> >
> > + *MachineArchId = (UINTN)Ret.Value;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the CPU's architecture ID
> >
> >
> > +
> >
> >
> > + Reads the marchid CSR.
> >
> >
> > +
> >
> >
> > + @param[out] MachineImplId The CPU's
> > implementation ID.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMachineImplId (
> >
> >
> > + OUT UINTN *MachineImplId
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EXT_BASE,
> > SBI_EXT_BASE_GET_MIMPID, 0);
> >
> >
> > + *MachineImplId = (UINTN)Ret.Value;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +//
> >
> >
> > +// SBI interface function for the hart state management
> > extension
> >
> >
> > +//
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Politely ask the SBI to start a given hart.
> >
> >
> > +
> >
> >
> > + This call may return before the hart has actually
> > started executing, if the
> >
> >
> > + SBI implementation can guarantee that the hart is
> > actually going to start.
> >
> >
> > +
> >
> >
> > + Before the hart jumps to StartAddr, the hart MUST
> > configure PMP if present
> >
> >
> > + and switch to S-mode.
> >
> >
> > +
> >
> >
> > + @param[in] HartId The id of the hart
> > to start.
> >
> >
> > + @param[in] StartAddr The physical
> > address, where the hart starts
> >
> >
> > + executing from.
> >
> >
> > + @param[in] Priv An XLEN-bit value,
> > which will be in register
> >
> >
> > + a1 when the hart
> > starts.
> >
> >
> > + @retval EFI_SUCCESS Hart was stopped and
> > will start executing from StartAddr.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr is not
> > valid, possibly due to following reasons:
> >
> >
> > + - It is not a
> > valid physical address.
> >
> >
> > + - The address is
> > prohibited by PMP to run in
> >
> >
> > + supervisor mode.
> >
> >
> > + @retval EFI_INVALID_PARAMETER HartId is not a
> > valid hart id
> >
> >
> > + @retval EFI_ALREADY_STARTED The hart is already
> > running.
> >
> >
> > + @retval other The start request
> > failed for unknown reasons.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiHartStart (
> >
> >
> > + IN UINTN HartId,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Priv
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EXT_HSM,
> >
> >
> > + SBI_EXT_HSM_HART_START,
> >
> >
> > + 3,
> >
> >
> > + HartId,
> >
> >
> > + StartAddr,
> >
> >
> > + Priv
> >
> >
> > + );
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Return execution of the calling hart to SBI.
> >
> >
> > +
> >
> >
> > + MUST be called in S-Mode with user interrupts
> > disabled.
> >
> >
> > + This call is not expected to return, unless a failure
> > occurs.
> >
> >
> > +
> >
> >
> > + @retval EFI_SUCCESS Never occurs. When
> > successful, the call does not return.
> >
> >
> > + @retval other Failed to stop hard
> > for an unknown reason.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiHartStop (
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EXT_HSM,
> > SBI_EXT_HSM_HART_STOP, 0);
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get the current status of a hart.
> >
> >
> > +
> >
> >
> > + Since harts can transition between states at any
> > time, the status retrieved
> >
> >
> > + by this function may already be out of date, once it
> > returns.
> >
> >
> > +
> >
> >
> > + Possible values for HartStatus are:
> >
> >
> > + 0: STARTED
> >
> >
> > + 1: STOPPED
> >
> >
> > + 2: START_REQUEST_PENDING
> >
> >
> > + 3: STOP_REQUEST_PENDING
> >
> >
> > +
> >
> >
> > + @param[out] HartStatus The pointer in which
> > the hart's status is
> >
> >
> > + stored.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > + @retval EFI_INVALID_PARAMETER A parameter is
> > invalid.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiHartGetStatus (
> >
> >
> > + IN UINTN HartId,
> >
> >
> > + OUT UINTN *HartStatus
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EXT_HSM,
> > SBI_EXT_HSM_HART_GET_STATUS, 1, HartId);
> >
> >
> > +
> >
> >
> > + if (!Ret.Error) {
> >
> >
> > + *HartStatus = (UINTN)Ret.Value;
> >
> >
> > + }
> >
> >
> > +
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Clear pending timer interrupt bit and set timer for
> > next event after Time.
> >
> >
> > +
> >
> >
> > + To clear the timer without scheduling a timer event,
> > set Time to a
> >
> >
> > + practically infinite value or mask the timer
> > interrupt by clearing sie.STIE.
> >
> >
> > +
> >
> >
> > + @param[in] Time The time offset to
> > the next scheduled timer interrupt.
> >
> >
> > +**/
> >
> >
> > +VOID
> >
> >
> > +EFIAPI
> >
> >
> > +SbiSetTimer (
> >
> >
> > + IN UINT64 Time
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiCall (SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, 1,
> > Time);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiSendIpi (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EXT_IPI,
> >
> >
> > + SBI_EXT_IPI_SEND_IPI,
> >
> >
> > + 2,
> >
> >
> > + (UINTN)HartMask,
> >
> >
> > + HartMaskBase
> >
> >
> > + );
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs remote harts to execute a FENCE.I
> > instruction.
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteFenceI (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EXT_RFENCE,
> >
> >
> > + SBI_EXT_RFENCE_REMOTE_FENCE_I,
> >
> >
> > + 2,
> >
> >
> > + (UINTN)HartMask,
> >
> >
> > + HartMaskBase
> >
> >
> > + );
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.VMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.VMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteSfenceVma (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EXT_RFENCE,
> >
> >
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> >
> >
> > + 4,
> >
> >
> > + (UINTN)HartMask,
> >
> >
> > + HartMaskBase,
> >
> >
> > + StartAddr,
> >
> >
> > + Size
> >
> >
> > + );
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.VMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.VMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + Covers only the given ASID.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteSfenceVmaAsid (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size,
> >
> >
> > + IN UINTN Asid
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EXT_RFENCE,
> >
> >
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> >
> >
> > + 5,
> >
> >
> > + (UINTN)HartMask,
> >
> >
> > + HartMaskBase,
> >
> >
> > + StartAddr,
> >
> >
> > + Size,
> >
> >
> > + Asid
> >
> >
> > + );
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.GVMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.GVMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + Covers only the given VMID.
> >
> >
> > + This function call is only valid for harts
> > implementing the hypervisor extension.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_UNSUPPORTED SBI does not
> > implement this function or one
> >
> >
> > + of the target harts
> > does not support the
> >
> >
> > + hypervisor
> > extension.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteHFenceGvmaVmid (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size,
> >
> >
> > + IN UINTN Vmid
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EXT_RFENCE,
> >
> >
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> >
> >
> > + 5,
> >
> >
> > + (UINTN)HartMask,
> >
> >
> > + HartMaskBase,
> >
> >
> > + StartAddr,
> >
> >
> > + Size,
> >
> >
> > + Vmid
> >
> >
> > + );
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.GVMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.GVMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + This function call is only valid for harts
> > implementing the hypervisor extension.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_UNSUPPORTED SBI does not
> > implement this function or one
> >
> >
> > + of the target harts
> > does not support the
> >
> >
> > + hypervisor
> > extension.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteHFenceGvma (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EXT_RFENCE,
> >
> >
> > +
> > SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> >
> >
> > + 4,
> >
> >
> > + (UINTN)HartMask,
> >
> >
> > + HartMaskBase,
> >
> >
> > + StartAddr,
> >
> >
> > + Size
> >
> >
> > + );
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.VVMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.GVMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + Covers only the given ASID.
> >
> >
> > + This function call is only valid for harts
> > implementing the hypervisor extension.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_UNSUPPORTED SBI does not
> > implement this function or one
> >
> >
> > + of the target harts
> > does not support the
> >
> >
> > + hypervisor
> > extension.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteHFenceVvmaAsid (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size,
> >
> >
> > + IN UINTN Asid
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EXT_RFENCE,
> >
> >
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> >
> >
> > + 5,
> >
> >
> > + (UINTN)HartMask,
> >
> >
> > + HartMaskBase,
> >
> >
> > + StartAddr,
> >
> >
> > + Size,
> >
> >
> > + Asid
> >
> >
> > + );
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Instructs the remote harts to execute one or more
> > SFENCE.VVMA instructions.
> >
> >
> > +
> >
> >
> > + The SFENCE.GVMA covers the range of virtual addresses
> > between StartAaddr and Size.
> >
> >
> > + This function call is only valid for harts
> > implementing the hypervisor extension.
> >
> >
> > +
> >
> >
> > + The remote fence function acts as a full tlb flush if
> > * StartAddr and size
> >
> >
> > + are both 0 * size is equal to 2^XLEN-1
> >
> >
> > +
> >
> >
> > + @param[in] HartMask Scalar bit-vector
> > containing hart ids
> >
> >
> > + @param[in] HartMaskBase The starting hartid
> > from which the bit-vector
> >
> >
> > + must be computed. If
> > set to -1, HartMask is
> >
> >
> > + ignored and all
> > harts are considered.
> >
> >
> > + @param[in] StartAddr The first address of
> > the affected range.
> >
> >
> > + @param[in] Size How many addresses
> > are affected.
> >
> >
> > + @retval EFI_SUCCESS IPI was sent to all
> > the targeted harts.
> >
> >
> > + @retval EFI_LOAD_ERROR StartAddr or Size is
> > not valid.
> >
> >
> > + @retval EFI_UNSUPPORTED SBI does not
> > implement this function or one
> >
> >
> > + of the target harts
> > does not support the
> >
> >
> > + hypervisor
> > extension.
> >
> >
> > + @retval EFI_INVALID_PARAMETER Either
> > hart_mask_base or any of the hartid
> >
> >
> > + from hart_mask is
> > not valid i.e. either the
> >
> >
> > + hartid is not
> > enabled by the platform or is
> >
> >
> > + not available to the
> > supervisor.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiRemoteHFenceVvma (
> >
> >
> > + IN UINTN *HartMask,
> >
> >
> > + IN UINTN HartMaskBase,
> >
> >
> > + IN UINTN StartAddr,
> >
> >
> > + IN UINTN Size
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EXT_RFENCE,
> >
> >
> > +
> > SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> >
> >
> > + 4,
> >
> >
> > + (UINTN)HartMask,
> >
> >
> > + HartMaskBase,
> >
> >
> > + StartAddr,
> >
> >
> > + Size
> >
> >
> > + );
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +//
> >
> >
> > +// SBI interface function for the vendor extension
> >
> >
> > +//
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Call a function in a vendor defined SBI extension
> >
> >
> > +
> >
> >
> > + ASSERT() if the ExtensionId is not in the designated
> > SBI Vendor Extension
> >
> >
> > + Space or NumArgs exceeds SBI_CALL_MAX_ARGS.
> >
> >
> > +
> >
> >
> > + @param[in] ExtensionId The SBI vendor
> > extension ID.
> >
> >
> > + @param[in] FunctionId The function ID to
> > call in this extension.
> >
> >
> > + @param[in] NumArgs How many arguments
> > are passed.
> >
> >
> > + @param[in] ... Actual Arguments to
> > the function.
> >
> >
> > + @retval EFI_SUCCESS if the SBI function was called
> > and it was successful
> >
> >
> > + @retval others if the called SBI function returns an
> > error
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiVendorCall (
> >
> >
> > + IN UINTN ExtensionId,
> >
> >
> > + IN UINTN FunctionId,
> >
> >
> > + IN UINTN NumArgs,
> >
> >
> > + ...
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret;
> >
> >
> > + VA_LIST Args;
> >
> >
> > + VA_START (Args, NumArgs);
> >
> >
> > +
> >
> >
> > + ASSERT (ExtensionId >= SBI_EXT_VENDOR_START &&
> > ExtensionId <= SBI_EXT_VENDOR_END);
> >
> >
> > + ASSERT (NumArgs <= SBI_CALL_MAX_ARGS);
> >
> >
> > +
> >
> >
> > + switch (NumArgs) {
> >
> >
> > + case 0:
> >
> >
> > + Ret = SbiCall (ExtensionId, FunctionId,
> > NumArgs);
> >
> >
> > + break;
> >
> >
> > + case 1:
> >
> >
> > + Ret = SbiCall (ExtensionId, FunctionId,
> > NumArgs, VA_ARG (Args, UINTN));
> >
> >
> > + break;
> >
> >
> > + case 2:
> >
> >
> > + Ret = SbiCall (ExtensionId, FunctionId,
> > NumArgs, VA_ARG (Args, UINTN),
> >
> >
> > + VA_ARG (Args, UINTN));
> >
> >
> > + break;
> >
> >
> > + case 3:
> >
> >
> > + Ret = SbiCall (ExtensionId, FunctionId,
> > NumArgs, VA_ARG (Args, UINTN),
> >
> >
> > + VA_ARG (Args, UINTN), VA_ARG
> > (Args, UINTN));
> >
> >
> > + break;
> >
> >
> > + case 4:
> >
> >
> > + Ret = SbiCall (ExtensionId, FunctionId,
> > NumArgs, VA_ARG (Args, UINTN),
> >
> >
> > + VA_ARG (Args, UINTN), VA_ARG
> > (Args, UINTN),
> >
> >
> > + VA_ARG (Args, UINTN));
> >
> >
> > + break;
> >
> >
> > + case 5:
> >
> >
> > + Ret = SbiCall (ExtensionId, FunctionId,
> > NumArgs, VA_ARG (Args, UINTN),
> >
> >
> > + VA_ARG (Args, UINTN), VA_ARG
> > (Args, UINTN),
> >
> >
> > + VA_ARG (Args, UINTN), VA_ARG
> > (Args, UINTN));
> >
> >
> > + break;
> >
> >
> > + case 6:
> >
> >
> > + Ret = SbiCall (ExtensionId, FunctionId,
> > NumArgs, VA_ARG (Args, UINTN),
> >
> >
> > + VA_ARG (Args, UINTN), VA_ARG
> > (Args, UINTN),
> >
> >
> > + VA_ARG (Args, UINTN), VA_ARG
> > (Args, UINTN),
> >
> >
> > + VA_ARG (Args, UINTN));
> >
> >
> > + break;
> >
> >
> > + default:
> >
> >
> > + // Too many args. In theory SBI can handle more
> > arguments when they are
> >
> >
> > + // passed on the stack but no SBI extension
> > uses this, therefore it's
> >
> >
> > + // not yet implemented here.
> >
> >
> > + return EFI_INVALID_PARAMETER;
> >
> >
> > + }
> >
> >
> > +
> >
> >
> > + VA_END(Args);
> >
> >
> > + return TranslateError (Ret.Error);
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +//
> >
> >
> > +// SBI Firmware extension
> >
> >
> > +//
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get scratch space of the current hart.
> >
> >
> > +
> >
> >
> > + Please consider using the wrapper
> > SbiGetFirmwareContext if you only need to
> >
> >
> > + access the firmware context.
> >
> >
> > +
> >
> >
> > + @param[out] ScratchSpace The scratch space
> > pointer.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMscratch (
> >
> >
> > + OUT SBI_SCRATCH **ScratchSpace
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EDK2_FW_EXT,
> > SBI_EXT_FW_MSCRATCH_FUNC, 0);
> >
> >
> > +
> >
> >
> > + if (!Ret.Error) {
> >
> >
> > + *ScratchSpace = (SBI_SCRATCH *)Ret.Value;
> >
> >
> > + }
> >
> >
> > +
> >
> >
> > + return EFI_SUCCESS;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get scratch space of the given hart id.
> >
> >
> > +
> >
> >
> > + @param[in] HartId The hart id.
> >
> >
> > + @param[out] ScratchSpace The scratch space
> > pointer.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetMscratchHartid (
> >
> >
> > + IN UINTN HartId,
> >
> >
> > + OUT SBI_SCRATCH **ScratchSpace
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SbiRet Ret = SbiCall (
> >
> >
> > + SBI_EDK2_FW_EXT,
> >
> >
> > + SBI_EXT_FW_MSCRATCH_HARTID_FUNC,
> >
> >
> > + 1,
> >
> >
> > + HartId
> >
> >
> > + );
> >
> >
> > +
> >
> >
> > + if (!Ret.Error) {
> >
> >
> > + *ScratchSpace = (SBI_SCRATCH *)Ret.Value;
> >
> >
> > + }
> >
> >
> > +
> >
> >
> > + return EFI_SUCCESS;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Get firmware context of the calling hart.
> >
> >
> > +
> >
> >
> > + @param[out] FirmwareContext The firmware context
> > pointer.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiGetFirmwareContext (
> >
> >
> > + OUT EFI_RISCV_OPENSBI_FIRMWARE_CONTEXT
> > **FirmwareContext
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SBI_SCRATCH *ScratchSpace;
> >
> >
> > + SBI_PLATFORM *SbiPlatform;
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EDK2_FW_EXT,
> > SBI_EXT_FW_MSCRATCH_FUNC, 0);
> >
> >
> > +
> >
> >
> > + if (!Ret.Error) {
> >
> >
> > + ScratchSpace = (SBI_SCRATCH *)Ret.Value;
> >
> >
> > + SbiPlatform = (SBI_PLATFORM
> > *)sbi_platform_ptr(ScratchSpace);
> >
> >
> > + *FirmwareContext =
> > (EFI_RISCV_OPENSBI_FIRMWARE_CONTEXT *)SbiPlatform-
> > >firmware_context;
> >
> >
> > + }
> >
> >
> > +
> >
> >
> > + return EFI_SUCCESS;
> >
> >
> > +}
> >
> >
> > +
> >
> >
> > +/**
> >
> >
> > + Set firmware context of the calling hart.
> >
> >
> > +
> >
> >
> > + @param[in] FirmwareContext The firmware context
> > pointer.
> >
> >
> > + @retval EFI_SUCCESS The operation
> > succeeds.
> >
> >
> > +**/
> >
> >
> > +EFI_STATUS
> >
> >
> > +EFIAPI
> >
> >
> > +SbiSetFirmwareContext (
> >
> >
> > + IN EFI_RISCV_OPENSBI_FIRMWARE_CONTEXT
> > *FirmwareContext
> >
> >
> > + )
> >
> >
> > +{
> >
> >
> > + SBI_SCRATCH *ScratchSpace;
> >
> >
> > + SBI_PLATFORM *SbiPlatform;
> >
> >
> > + SbiRet Ret = SbiCall (SBI_EDK2_FW_EXT,
> > SBI_EXT_FW_MSCRATCH_FUNC, 0);
> >
> >
> > +
> >
> >
> > + if (!Ret.Error) {
> >
> >
> > + ScratchSpace = (SBI_SCRATCH *)Ret.Value;
> >
> >
> > + SbiPlatform = (SBI_PLATFORM *)sbi_platform_ptr
> > (ScratchSpace);
> >
> >
> > + SbiPlatform->firmware_context =
> > (UINTN)FirmwareContext;
> >
> >
> > + }
> >
> >
> > +
> >
> >
> > + return EFI_SUCCESS;
> >
> >
> > +}
> >
> >
> > --
> > 2.26.1
> >
> >
> >
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