From nobody Sun Feb 8 12:38:51 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) client-ip=66.175.222.108; envelope-from=bounce+27952+95730+1787277+3901457@groups.io; helo=mail02.groups.io; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+95730+1787277+3901457@groups.io ARC-Seal: i=1; a=rsa-sha256; t=1667136542; cv=none; d=zohomail.com; s=zohoarc; b=Y89D4vpUUmXBk0wU2slntXNRFxvOFDhRbijGtxvaoa+DHlzQ+RXLxP1lbj7RfeiLZELh5ZkpCWbB8/XpaNqH4McaT3wkSvBMzjycy49RSIhldlaES7IWsS+ZVzqgwxN/6kyvM4EUPvwg8dVD5HFkPe+ymUkWhrVX3ltTPCp4RyU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1667136542; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=xINH9sIfBEbvGLBy/sTFhNsetTKndUUJAjt6ql7Y/SE=; b=UPncfo7SBqB88JVuN1wAoHT3qEZD/JXEIKBVS/4PYjquiL5B/TdmPjrrm2a1CUMaZCs+SyWWCMyB5EFzqvWKjquxaI1N1bUKLFCOS5ubEPI6m+CkK+pYE94/FMEFunNmU44ONfFjB9EO4INPr7ykQxOpuRakd0dDKdV0+7vDrg8= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+95730+1787277+3901457@groups.io Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by mx.zohomail.com with SMTPS id 1667136542502714.331940968686; Sun, 30 Oct 2022 06:29:02 -0700 (PDT) Return-Path: X-Received: by 127.0.0.2 with SMTP id z2I3YY1788612xUDJDRAr30s; Sun, 30 Oct 2022 06:29:02 -0700 X-Received: from mail-pj1-f44.google.com (mail-pj1-f44.google.com [209.85.216.44]) by mx.groups.io with SMTP id smtpd.web09.8111.1667136541534586800 for ; Sun, 30 Oct 2022 06:29:01 -0700 X-Received: by mail-pj1-f44.google.com with SMTP id o7so5153621pjj.1 for ; Sun, 30 Oct 2022 06:29:01 -0700 (PDT) X-Gm-Message-State: Gw8Q0Y5rol9baLvs1WIfx9i4x1787277AA= X-Google-Smtp-Source: AMsMyM5mvofBBL1hx2IjtLcMHDZVzZ5xUh7DML8UVn2gloUh7lQLsxqE1xVd6vgQKSJuxop7TL9gGw== X-Received: by 2002:a17:902:cf03:b0:17e:c7a:678e with SMTP id i3-20020a170902cf0300b0017e0c7a678emr9081577plg.10.1667136540812; Sun, 30 Oct 2022 06:29:00 -0700 (PDT) X-Received: from localhost.localdomain ([49.206.12.236]) by smtp.gmail.com with ESMTPSA id r10-20020aa79eca000000b0056b6a22d6c9sm2612330pfq.212.2022.10.30.06.28.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Oct 2022 06:29:00 -0700 (PDT) From: "Sunil V L" To: devel@edk2.groups.io Cc: Michael D Kinney , Liming Gao , Zhiguang Liu , Abner Chang Subject: [edk2-devel] [edk2-staging/RiscV64QemuVirt PATCH V5 04/30] MdePkg: Add BaseRiscVSbiLib Library for RISC-V Date: Sun, 30 Oct 2022 18:58:16 +0530 Message-Id: <20221030132842.54077-5-sunilvl@ventanamicro.com> In-Reply-To: <20221030132842.54077-1-sunilvl@ventanamicro.com> References: <20221030132842.54077-1-sunilvl@ventanamicro.com> MIME-Version: 1.0 Precedence: Bulk List-Unsubscribe: List-Subscribe: List-Help: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,sunilvl@ventanamicro.com Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1667136542; bh=GVsHlDmfvMOvIOnFEo27VyA1UH1+xde7j/ZyFzGrZR0=; h=Cc:Date:From:Reply-To:Subject:To; b=GlMGXfPG4GEt0MIMRfVdW2Uc7zXy65h3WOwhFomZKRvkBhMuIdNfpN7tabO80KYoViR cF4D+nji1ojv12A7/6QSL4ZpfBpqatXoXMiM9GWdrFgsxpSV2svK3/BAkMQZsiD6GqQfm li0I1tpRarA4DFnuHezdJ8+dwUIm7IUp2V0= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1667136544034100017 Content-Type: text/plain; charset="utf-8" REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3D4076 This library is required to make SBI ecalls from the S-mode EDK2. This is mostly copied from edk2-platforms/Silicon/RISC-V/ProcessorPkg/Library/RiscVEdk2SbiLib Cc: Michael D Kinney Cc: Liming Gao Cc: Zhiguang Liu Signed-off-by: Sunil V L Acked-by: Abner Chang --- MdePkg/MdePkg.dec | 4 + MdePkg/MdePkg.dsc | 3 + MdePkg/Library/BaseRiscVSbiLib/BaseRiscVSbiLib.inf | 25 +++ MdePkg/Include/Library/BaseRiscVSbiLib.h | 127 +++++++++++ MdePkg/Library/BaseRiscVSbiLib/BaseRiscVSbiLib.c | 227 +++++++++++++++++= +++ 5 files changed, 386 insertions(+) diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec index dda1d5e15b9f..df681b2b99a5 100644 --- a/MdePkg/MdePkg.dec +++ b/MdePkg/MdePkg.dec @@ -311,6 +311,10 @@ [LibraryClasses.IA32, LibraryClasses.X64] ## @libraryclass Provides function to support TDX processing. TdxLib|Include/Library/TdxLib.h =20 +[LibraryClasses.RISCV64] + ## @libraryclass Provides function to make ecalls to SBI + BaseRiscVSbiLib|Include/Library/BaseRiscVSbiLib.h + [Guids] # # GUID defined in UEFI2.1/UEFI2.0/EFI1.1 diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc index 493a13ec9197..c7961a9b03f1 100644 --- a/MdePkg/MdePkg.dsc +++ b/MdePkg/MdePkg.dsc @@ -189,4 +189,7 @@ [Components.ARM, Components.AARCH64] MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsicArmVirt.inf MdePkg/Library/BaseStackCheckLib/BaseStackCheckLib.inf =20 +[Components.RISCV64] + MdePkg/Library/BaseRiscVSbiLib/BaseRiscVSbiLib.inf + [BuildOptions] diff --git a/MdePkg/Library/BaseRiscVSbiLib/BaseRiscVSbiLib.inf b/MdePkg/Li= brary/BaseRiscVSbiLib/BaseRiscVSbiLib.inf new file mode 100644 index 000000000000..d03132bf01c1 --- /dev/null +++ b/MdePkg/Library/BaseRiscVSbiLib/BaseRiscVSbiLib.inf @@ -0,0 +1,25 @@ +## @file +# RISC-V Library to call SBI ecalls +# +# Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All righ= ts reserved.
+# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION =3D 0x0001001b + BASE_NAME =3D BaseRiscVSbiLib + FILE_GUID =3D D742CF3D-E600-4009-8FB5-318073008508 + MODULE_TYPE =3D BASE + VERSION_STRING =3D 1.0 + LIBRARY_CLASS =3D RiscVSbiLib + +[Sources] + BaseRiscVSbiLib.c + +[Packages] + MdePkg/MdePkg.dec + +[LibraryClasses] + BaseLib diff --git a/MdePkg/Include/Library/BaseRiscVSbiLib.h b/MdePkg/Include/Libr= ary/BaseRiscVSbiLib.h new file mode 100644 index 000000000000..e9886187526a --- /dev/null +++ b/MdePkg/Include/Library/BaseRiscVSbiLib.h @@ -0,0 +1,127 @@ +/** @file + Library to call the RISC-V SBI ecalls + + Copyright (c) 2021-2022, Hewlett Packard Development LP. All rights rese= rved.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + + @par Glossary: + - Hart - Hardware Thread, similar to a CPU core + + Currently, EDK2 needs to call SBI only to set the time and to do system = reset. + +**/ + +#ifndef RISCV_SBI_LIB_H_ +#define RISCV_SBI_LIB_H_ + +#include + +/* SBI Extension IDs */ +#define SBI_EXT_TIME 0x54494D45 +#define SBI_EXT_SRST 0x53525354 + +/* SBI function IDs for TIME extension*/ +#define SBI_EXT_TIME_SET_TIMER 0x0 + +/* SBI function IDs for SRST extension */ +#define SBI_EXT_SRST_RESET 0x0 + +#define SBI_SRST_RESET_TYPE_SHUTDOWN 0x0 +#define SBI_SRST_RESET_TYPE_COLD_REBOOT 0x1 +#define SBI_SRST_RESET_TYPE_WARM_REBOOT 0x2 +#define SBI_SRST_RESET_TYPE_LAST SBI_SRST_RESET_TYPE_WARM_REBOOT + +#define SBI_SRST_RESET_REASON_NONE 0x0 +#define SBI_SRST_RESET_REASON_SYSFAIL 0x1 + +/* SBI return error codes */ +#define SBI_SUCCESS 0 +#define SBI_ERR_FAILED -1 +#define SBI_ERR_NOT_SUPPORTED -2 +#define SBI_ERR_INVALID_PARAM -3 +#define SBI_ERR_DENIED -4 +#define SBI_ERR_INVALID_ADDRESS -5 +#define SBI_ERR_ALREADY_AVAILABLE -6 +#define SBI_ERR_ALREADY_STARTED -7 +#define SBI_ERR_ALREADY_STOPPED -8 + +#define SBI_LAST_ERR SBI_ERR_ALREADY_STOPPED + +typedef struct { + UINT64 BootHartId; + VOID *PeiServiceTable; // PEI Service table + UINT64 FlattenedDeviceTree; // Pointer to Flattened Device tree +} EFI_RISCV_FIRMWARE_CONTEXT; + +// +// EDK2 OpenSBI firmware extension return status. +// +typedef struct { + UINTN Error; ///< SBI status code + UINTN Value; ///< Value returned +} SBI_RET; + +VOID +EFIAPI +SbiSetTimer ( + IN UINT64 Time + ); + +EFI_STATUS +EFIAPI +SbiSystemReset ( + IN UINTN ResetType, + IN UINTN ResetReason + ); + +/** + Get firmware context of the calling hart. + + @param[out] FirmwareContext The firmware context pointer. +**/ +VOID +EFIAPI +GetFirmwareContext ( + OUT EFI_RISCV_FIRMWARE_CONTEXT **FirmwareContext + ); + +/** + Set firmware context of the calling hart. + + @param[in] FirmwareContext The firmware context pointer. +**/ +VOID +EFIAPI +SetFirmwareContext ( + IN EFI_RISCV_FIRMWARE_CONTEXT *FirmwareContext + ); + +/** + Get pointer to OpenSBI Firmware Context + + Get the pointer of firmware context. + + @param FirmwareContextPtr Pointer to retrieve pointer to the + Firmware Context. +**/ +VOID +EFIAPI +GetFirmwareContextPointer ( + IN OUT EFI_RISCV_FIRMWARE_CONTEXT **FirmwareContextPtr + ); + +/** + Set pointer to OpenSBI Firmware Context + + Set the pointer of firmware context. + + @param FirmwareContextPtr Pointer to Firmware Context. +**/ +VOID +EFIAPI +SetFirmwareContextPointer ( + IN EFI_RISCV_FIRMWARE_CONTEXT *FirmwareContextPtr + ); + +#endif diff --git a/MdePkg/Library/BaseRiscVSbiLib/BaseRiscVSbiLib.c b/MdePkg/Libr= ary/BaseRiscVSbiLib/BaseRiscVSbiLib.c new file mode 100644 index 000000000000..5db95a008069 --- /dev/null +++ b/MdePkg/Library/BaseRiscVSbiLib/BaseRiscVSbiLib.c @@ -0,0 +1,227 @@ +/** @file + Instance of the SBI ecall library. + + It allows calling an SBI function via an ecall from S-Mode. + + Copyright (c) 2021-2022, Hewlett Packard Development LP. All rights rese= rved.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include +#include +#include + +// +// 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 o= f 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 SBI_RET structure with value and error code. + +**/ +STATIC +SBI_RET +EFIAPI +SbiCall ( + IN UINTN ExtId, + IN UINTN FuncId, + IN UINTN NumArgs, + ... + ) +{ + UINTN I; + SBI_RET Ret; + UINTN Args[SBI_CALL_MAX_ARGS]; + VA_LIST ArgList; + + VA_START (ArgList, NumArgs); + + ASSERT (NumArgs <=3D SBI_CALL_MAX_ARGS); + + for (I =3D 0; I < SBI_CALL_MAX_ARGS; I++) { + if (I < NumArgs) { + Args[I] =3D VA_ARG (ArgList, UINTN); + } else { + // Default to 0 for all arguments that are not given + Args[I] =3D 0; + } + } + + VA_END (ArgList); + + register UINTN a0 asm ("a0") =3D Args[0]; + register UINTN a1 asm ("a1") =3D Args[1]; + register UINTN a2 asm ("a2") =3D Args[2]; + register UINTN a3 asm ("a3") =3D Args[3]; + register UINTN a4 asm ("a4") =3D Args[4]; + register UINTN a5 asm ("a5") =3D Args[5]; + register UINTN a6 asm ("a6") =3D (UINTN)(FuncId); + register UINTN a7 asm ("a7") =3D (UINTN)(ExtId); + + asm volatile ("ecall" \ + : "+r" (a0), "+r" (a1) \ + : "r" (a2), "r" (a3), "r" (a4), "r" (a5), "r" (a6), "r" (a7) \ + : "memory"); \ + Ret.Error =3D a0; + Ret.Value =3D 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; + } +} + +/** + Clear pending timer interrupt bit and set timer for next event after Tim= e. + + To clear the timer without scheduling a timer event, set Time to a + practically infinite value or mask the timer interrupt by clearing sie.S= TIE. + + @param[in] Time The time offset to the next scheduled t= imer interrupt. +**/ +VOID +EFIAPI +SbiSetTimer ( + IN UINT64 Time + ) +{ + SbiCall (SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, 1, Time); +} + +EFI_STATUS +EFIAPI +SbiSystemReset ( + IN UINTN ResetType, + IN UINTN ResetReason + ) +{ + SBI_RET Ret; + + Ret =3D SbiCall ( + SBI_EXT_SRST, + SBI_EXT_SRST_RESET, + 2, + ResetType, + ResetReason + ); + + return TranslateError (Ret.Error); +} + +/** + Get firmware context of the calling hart. + + @param[out] FirmwareContext The firmware context pointer. + @retval EFI_SUCCESS The operation succeeds. +**/ +VOID +EFIAPI +GetFirmwareContext ( + OUT EFI_RISCV_FIRMWARE_CONTEXT **FirmwareContext + ) +{ + *FirmwareContext =3D (EFI_RISCV_FIRMWARE_CONTEXT *)RiscVGetSupervisorScr= atch (); +} + +/** + Set firmware context of the calling hart. + + @param[in] FirmwareContext The firmware context pointer. +**/ +VOID +EFIAPI +SetFirmwareContext ( + IN EFI_RISCV_FIRMWARE_CONTEXT *FirmwareContext + ) +{ + RiscVSetSupervisorScratch ((UINT64)FirmwareContext); +} + +/** + Get pointer to OpenSBI Firmware Context + + Get the pointer of firmware context through OpenSBI FW Extension SBI. + + @param FirmwareContextPtr Pointer to retrieve pointer to the + Firmware Context. +**/ +VOID +EFIAPI +GetFirmwareContextPointer ( + IN OUT EFI_RISCV_FIRMWARE_CONTEXT **FirmwareContextPtr + ) +{ + GetFirmwareContext (FirmwareContextPtr); +} + +/** + Set the pointer to OpenSBI Firmware Context + + Set the pointer of firmware context through OpenSBI FW Extension SBI. + + @param FirmwareContextPtr Pointer to Firmware Context. +**/ +VOID +EFIAPI +SetFirmwareContextPointer ( + IN EFI_RISCV_FIRMWARE_CONTEXT *FirmwareContextPtr + ) +{ + SetFirmwareContext (FirmwareContextPtr); +} --=20 2.38.0 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#95730): https://edk2.groups.io/g/devel/message/95730 Mute This Topic: https://groups.io/mt/94664296/1787277 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-