Support RISC-V cache related functions. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Abner Chang <abner.ch...@hpe.com> --- .../BaseSynchronizationLib.inf | 6 + .../RiscV64/Synchronization.c | 189 +++++++++++++++++++++ .../RiscV64/SynchronizationAsm.s | 84 +++++++++ 3 files changed, 279 insertions(+) create mode 100644 MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.c create mode 100644 MdePkg/Library/BaseSynchronizationLib/RiscV64/SynchronizationAsm.s
diff --git a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf index 446bc19..d49001b 100755 --- a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf +++ b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf @@ -3,6 +3,7 @@ # # Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR> # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> +# Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR> # # SPDX-License-Identifier: BSD-2-Clause-Patent # @@ -78,6 +79,11 @@ AArch64/Synchronization.S | GCC AArch64/Synchronization.asm | MSFT +[Sources.RISCV64] + Synchronization.c + RiscV64/Synchronization.c | GCC + RiscV64/SynchronizationAsm.s + [Packages] MdePkg/MdePkg.dec diff --git a/MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.c b/MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.c new file mode 100644 index 0000000..e85e2f5 --- /dev/null +++ b/MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.c @@ -0,0 +1,189 @@ +/** @file + Implementation of synchronization functions on RISC-V + + Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR> + + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +**/ + +#include <Library/DebugLib.h> + +UINT32 +SyncCompareExchange32 ( + IN volatile UINT32 *Value, + IN UINT32 CompareValue, + IN UINT32 ExchangeValue +); + +UINT64 +SyncCompareExchange64 ( + IN volatile UINT64 *Value, + IN UINT64 CompareValue, + IN UINT64 ExchangeValue +); + +UINT32 +SyncSyncIncrement32 ( + IN volatile UINT32 *Value + ); + +UINT32 +SyncSyncDecrement32 ( + IN volatile UINT32 *Value + ); + +/** + Performs an atomic compare exchange operation on a 16-bit + unsigned integer. + + Performs an atomic compare exchange operation on the 16-bit + unsigned integer specified by Value. If Value is equal to + CompareValue, then Value is set to ExchangeValue and + CompareValue is returned. If Value is not equal to + CompareValue, then Value is returned. The compare exchange + operation must be performed using MP safe mechanisms. + + @param Value A pointer to the 16-bit value for the + compare exchange operation. + @param CompareValue 16-bit value used in compare operation. + @param ExchangeValue 16-bit value used in exchange operation. + + @return The original *Value before exchange. + +**/ +UINT16 +EFIAPI +InternalSyncCompareExchange16 ( + IN volatile UINT16 *Value, + IN UINT16 CompareValue, + IN UINT16 ExchangeValue + ) +{ + DEBUG((DEBUG_ERROR, "%a:RISC-V does not support 16-bit AMO operation\n", __FUNCTION__)); + ASSERT (FALSE); + return 0; +} + +/** + Performs an atomic compare exchange operation on a 32-bit + unsigned integer. + + Performs an atomic compare exchange operation on the 32-bit + unsigned integer specified by Value. If Value is equal to + CompareValue, then Value is set to ExchangeValue and + CompareValue is returned. If Value is not equal to + CompareValue, then Value is returned. The compare exchange + operation must be performed using MP safe mechanisms. + + @param Value A pointer to the 32-bit value for the + compare exchange operation. + @param CompareValue 32-bit value used in compare operation. + @param ExchangeValue 32-bit value used in exchange operation. + + @return The original *Value before exchange. + +**/ +UINT32 +EFIAPI +InternalSyncCompareExchange32 ( + IN volatile UINT32 *Value, + IN UINT32 CompareValue, + IN UINT32 ExchangeValue + ) +{ + + if (((UINTN)Value % sizeof (UINT32)) != 0) { + DEBUG((DEBUG_ERROR, "%a:Value pointer must aligned at natural address.\n", __FUNCTION__)); + ASSERT (FALSE); + } + return SyncCompareExchange32(Value, CompareValue, ExchangeValue); +} + +/** + Performs an atomic compare exchange operation on a 64-bit unsigned integer. + + Performs an atomic compare exchange operation on the 64-bit unsigned integer specified + by Value. If Value is equal to CompareValue, then Value is set to ExchangeValue and + CompareValue is returned. If Value is not equal to CompareValue, then Value is returned. + The compare exchange operation must be performed using MP safe mechanisms. + + @param Value A pointer to the 64-bit value for the compare exchange + operation. + @param CompareValue 64-bit value used in compare operation. + @param ExchangeValue 64-bit value used in exchange operation. + + @return The original *Value before exchange. + +**/ +UINT64 +EFIAPI +InternalSyncCompareExchange64 ( + IN volatile UINT64 *Value, + IN UINT64 CompareValue, + IN UINT64 ExchangeValue + ) +{ + if (((UINTN)Value % sizeof (UINT64)) != 0) { + DEBUG((DEBUG_ERROR, "%a:Value pointer must aligned at natural address.\n", __FUNCTION__)); + ASSERT (FALSE); + } + return SyncCompareExchange64 (Value, CompareValue, ExchangeValue); +} + +/** + Performs an atomic increment of an 32-bit unsigned integer. + + Performs an atomic increment of the 32-bit unsigned integer specified by + Value and returns the incremented value. The increment operation must be + performed using MP safe mechanisms. The state of the return value is not + guaranteed to be MP safe. + + @param Value A pointer to the 32-bit value to increment. + + @return The incremented value. + +**/ +UINT32 +EFIAPI +InternalSyncIncrement ( + IN volatile UINT32 *Value + ) +{ + if (((UINTN)Value % sizeof (UINT32)) != 0) { + DEBUG((DEBUG_ERROR, "%a:Value pointer must aligned at natural address.\n", __FUNCTION__)); + ASSERT (FALSE); + } + return SyncSyncIncrement32 (Value); +} + +/** + Performs an atomic decrement of an 32-bit unsigned integer. + + Performs an atomic decrement of the 32-bit unsigned integer specified by + Value and returns the decrement value. The decrement operation must be + performed using MP safe mechanisms. The state of the return value is not + guaranteed to be MP safe. + + @param Value A pointer to the 32-bit value to decrement. + + @return The decrement value. + +**/ +UINT32 +EFIAPI +InternalSyncDecrement ( + IN volatile UINT32 *Value + ) +{ + if (((UINTN)Value % sizeof (UINT32)) != 0) { + DEBUG((DEBUG_ERROR, "%a:Value pointer must aligned at natural address.\n", __FUNCTION__)); + ASSERT (FALSE); + } + return SyncSyncDecrement32 (Value); +} diff --git a/MdePkg/Library/BaseSynchronizationLib/RiscV64/SynchronizationAsm.s b/MdePkg/Library/BaseSynchronizationLib/RiscV64/SynchronizationAsm.s new file mode 100644 index 0000000..3e838b0 --- /dev/null +++ b/MdePkg/Library/BaseSynchronizationLib/RiscV64/SynchronizationAsm.s @@ -0,0 +1,84 @@ +//------------------------------------------------------------------------------ +// +// RISC-V synchronization functions. +// +// Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR> +// +// This program and the accompanying materials +// are licensed and made available under the terms and conditions of the BSD License +// which accompanies this distribution. The full text of the license may be found at +// http://opensource.org/licenses/bsd-license.php. +// +// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +// +//------------------------------------------------------------------------------ +#include <Base.h> + +.data + +.text +.align 3 + +.global ASM_PFX(SyncCompareExchange32) +.global ASM_PFX(SyncCompareExchange64) +.global ASM_PFX(SyncSyncIncrement32) +.global ASM_PFX(SyncSyncDecrement32) + +// +// ompare and xchange a 32-bit value. +// +// @param a0 : Pointer to 32-bit value. +// @param a1 : Compare value. +// @param a2 : Exchange value. +// +ASM_PFX (SyncCompareExchange32): + lr.w a3, (a0) // Load the value from a0 and make + // the reservation of address. + bne a3, a1, exit + sc.w a3, a2, (a0) // Write the value back to the address. + mv a3, a1 +exit: + mv a0, a3 + ret + +.global ASM_PFX(SyncCompareExchange64) + +// +// Compare and xchange a 64-bit value. +// +// @param a0 : Pointer to 64-bit value. +// @param a1 : Compare value. +// @param a2 : Exchange value. +// +ASM_PFX (SyncCompareExchange64): + lr.d a3, (a0) // Load the value from a0 and make + // the reservation of address. + bne a3, a1, exit + sc.d a3, a2, (a0) // Write the value back to the address. + mv a3, a1 +exit2: + mv a0, a3 + ret + +// +// Performs an atomic increment of an 32-bit unsigned integer. +// +// @param a0 : Pointer to 32-bit value. +// +ASM_PFX (SyncSyncIncrement32): + li a1, 1 + amoadd.w a2, a1, (a0) + mv a0, a2 + ret + +// +// Performs an atomic decrement of an 32-bit unsigned integer. +// +// @param a0 : Pointer to 32-bit value. +// +ASM_PFX (SyncSyncDecrement32): + li a1, -1 + amoadd.w a2, a1, (a0) + mv a0, a2 + ret -- 2.7.4 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. 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