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.
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?
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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