From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f169.google.com (mail-pg1-f169.google.com [209.85.215.169]) by mx.groups.io with SMTP id smtpd.web11.4510.1665396770414942235 for ; Mon, 10 Oct 2022 03:12:50 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@ventanamicro.com header.s=google header.b=bZdJufbc; spf=pass (domain: ventanamicro.com, ip: 209.85.215.169, mailfrom: sunilvl@ventanamicro.com) Received: by mail-pg1-f169.google.com with SMTP id f193so9992225pgc.0 for ; Mon, 10 Oct 2022 03:12:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=eVGC+gpoKH0Z+QptuNZzlYFzPwB53yINKHidgk2vhLI=; b=bZdJufbcNVnYlyV2gajkSH4u3hyL2yxqqZv/mGf2EFtKdv9Fzbd6dzdg/XU2ZLu9Nw 0AENO6qIT06+TweGxzYe7drHYP7lYBsebuYJEm8CoZNGrvvDVspB99IpadjODlTuxz8Z jSv64YVkcwTfyoCPXw4jhPXeycNFnm57mpFvYOE0CW+2IDUVkAXwRsXFJd9rXcXUKgak lafVZIz6q9q0XqrkIg/jqr1jDhpBOInjVPOQM/87AjSSthVmuqZCaEbhEtu3/TgSZUcP SS16WrusKJ79Gh6HqybIrYbBkIvmPLHs3o/avPngfyx6zpqbO9HaZFSxX//TxaLt3/FM n1uA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=eVGC+gpoKH0Z+QptuNZzlYFzPwB53yINKHidgk2vhLI=; b=0MGuX0yJW34RM0Sk/hkKGf7a9YPPXmNyJvPfRFaiM76HeDzplBg2Blf+05bI1jiR// pwi4CZ+AmExKXrc482eMtOd17D+slaqgnHoc7+2IogyNDlq1g/BMJHaxNYnFqFzyYAc9 shH3PfkdpOfkavfg1OJfDUFkIubW/W/qBcGBG5pXFlOqmnCDzpT783X9FllIQbfoDVr5 WI1PUGBihW/LMSSksWYKxtayQCGsETAte434eWjzOAVe8z9yRRXsMlW2VC9vslOnOb2p qFFkbGIDeTgm5vSTfhZ+OuvpA5AZe/J1Lp5kZU/tfwtHp+YRUZMl1RpHybNajHLb00nt CPZA== X-Gm-Message-State: ACrzQf32XUWDdL/Si0Y5Wx3eIfNXljBLqLtDzQPyQ3Hr8RRxlsn2Ymrl XA2V3eSMAdiKikoV5wDXPdadyt1L40OgCA== X-Google-Smtp-Source: AMsMyM6WoPLcw9Vk08tt7hg2cpXJd0EDRCQ0SLkFMM45bhxvpnncW2+Gb60ko98XSlQ9UHlSOlfD2w== X-Received: by 2002:a05:6a00:1707:b0:563:235:769b with SMTP id h7-20020a056a00170700b005630235769bmr10657114pfc.19.1665396769751; Mon, 10 Oct 2022 03:12:49 -0700 (PDT) Return-Path: Received: from localhost.localdomain ([49.206.13.138]) by smtp.gmail.com with ESMTPSA id h17-20020a170902f55100b001788ccecbf5sm6302138plf.31.2022.10.10.03.12.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Oct 2022 03:12:49 -0700 (PDT) From: "Sunil V L" To: devel@edk2.groups.io Cc: Eric Dong , Ray Ni , Rahul Kumar , Daniel Schaefer Subject: [edk2-staging/RiscV64QemuVirt PATCH 14/29] UefiCpuPkg/CpuTimerLib: Add support for RISC-V Date: Mon, 10 Oct 2022 15:41:47 +0530 Message-Id: <20221010101202.1146624-15-sunilvl@ventanamicro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221010101202.1146624-1-sunilvl@ventanamicro.com> References: <20221010101202.1146624-1-sunilvl@ventanamicro.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4076 This is mostly copied from edk2-platforms/Silicon/RISC-V/ProcessorPkg/Library/RiscVTimerLib Cc: Eric Dong Cc: Ray Ni Cc: Rahul Kumar Cc: Daniel Schaefer Signed-off-by: Sunil V L --- .../Library/CpuTimerLib/BaseCpuTimerLib.inf | 3 + .../Library/CpuTimerLib/RiscV64/CpuTimerLib.c | 199 ++++++++++++++++++ 2 files changed, 202 insertions(+) create mode 100644 UefiCpuPkg/Library/CpuTimerLib/RiscV64/CpuTimerLib.c diff --git a/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf b/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf index a22457b44940..554ce9fe9db8 100644 --- a/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf +++ b/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf @@ -22,6 +22,9 @@ [Sources.IA32, Sources.X64] Ia32_X64/CpuTimerLib.c Ia32_X64/BaseCpuTimerLib.c +[Sources.RISCV64] + RiscV64/CpuTimerLib.c + [Packages] MdePkg/MdePkg.dec UefiCpuPkg/UefiCpuPkg.dec diff --git a/UefiCpuPkg/Library/CpuTimerLib/RiscV64/CpuTimerLib.c b/UefiCpuPkg/Library/CpuTimerLib/RiscV64/CpuTimerLib.c new file mode 100644 index 000000000000..9c8efc0f3530 --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/RiscV64/CpuTimerLib.c @@ -0,0 +1,199 @@ +/** @file + RISC-V instance of Timer Library. + + Copyright (c) 2016 - 2022, Hewlett Packard Enterprise Development LP. All rights reserved.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include +#include +#include +#include + +/** + Stalls the CPU for at least the given number of ticks. + + Stalls the CPU for at least the given number of ticks. It's invoked by + MicroSecondDelay() and NanoSecondDelay(). + + @param Delay A period of time to delay in ticks. + +**/ +VOID +InternalRiscVTimerDelay ( + IN UINT32 Delay + ) +{ + UINT32 Ticks; + UINT32 Times; + + Times = Delay >> (RISCV_TIMER_COMPARE_BITS - 2); + Delay &= ((1 << (RISCV_TIMER_COMPARE_BITS - 2)) - 1); + do { + // + // The target timer count is calculated here + // + Ticks = RiscVReadTimer () + Delay; + Delay = 1 << (RISCV_TIMER_COMPARE_BITS - 2); + while (((Ticks - RiscVReadTimer ()) & (1 << (RISCV_TIMER_COMPARE_BITS - 1))) == 0) { + CpuPause (); + } + } while (Times-- > 0); +} + +/** + Stalls the CPU for at least the given number of microseconds. + + Stalls the CPU for the number of microseconds specified by MicroSeconds. + + @param MicroSeconds The minimum number of microseconds to delay. + + @return MicroSeconds + +**/ +UINTN +EFIAPI +MicroSecondDelay ( + IN UINTN MicroSeconds + ) +{ + InternalRiscVTimerDelay ( + (UINT32)DivU64x32 ( + MultU64x32 ( + MicroSeconds, + PcdGet64 (PcdCpuCoreCrystalClockFrequency) + ), + 1000000u + ) + ); + return MicroSeconds; +} + +/** + Stalls the CPU for at least the given number of nanoseconds. + + Stalls the CPU for the number of nanoseconds specified by NanoSeconds. + + @param NanoSeconds The minimum number of nanoseconds to delay. + + @return NanoSeconds + +**/ +UINTN +EFIAPI +NanoSecondDelay ( + IN UINTN NanoSeconds + ) +{ + InternalRiscVTimerDelay ( + (UINT32)DivU64x32 ( + MultU64x32 ( + NanoSeconds, + PcdGet64 (PcdCpuCoreCrystalClockFrequency) + ), + 1000000000u + ) + ); + return NanoSeconds; +} + +/** + Retrieves the current value of a 64-bit free running performance counter. + + Retrieves the current value of a 64-bit free running performance counter. The + counter can either count up by 1 or count down by 1. If the physical + performance counter counts by a larger increment, then the counter values + must be translated. The properties of the counter can be retrieved from + GetPerformanceCounterProperties(). + + @return The current value of the free running performance counter. + +**/ +UINT64 +EFIAPI +GetPerformanceCounter ( + VOID + ) +{ + return (UINT64)RiscVReadTimer (); +} + +/**return + Retrieves the 64-bit frequency in Hz and the range of performance counter + values. + + If StartValue is not NULL, then the value that the performance counter starts + with immediately after is it rolls over is returned in StartValue. If + EndValue is not NULL, then the value that the performance counter end with + immediately before it rolls over is returned in EndValue. The 64-bit + frequency of the performance counter in Hz is always returned. If StartValue + is less than EndValue, then the performance counter counts up. If StartValue + is greater than EndValue, then the performance counter counts down. For + example, a 64-bit free running counter that counts up would have a StartValue + of 0 and an EndValue of 0xFFFFFFFFFFFFFFFF. A 24-bit free running counter + that counts down would have a StartValue of 0xFFFFFF and an EndValue of 0. + + @param StartValue The value the performance counter starts with when it + rolls over. + @param EndValue The value that the performance counter ends with before + it rolls over. + + @return The frequency in Hz. + +**/ +UINT64 +EFIAPI +GetPerformanceCounterProperties ( + OUT UINT64 *StartValue, OPTIONAL + OUT UINT64 *EndValue OPTIONAL + ) +{ + if (StartValue != NULL) { + *StartValue = 0; + } + + if (EndValue != NULL) { + *EndValue = 32 - 1; + } + + return PcdGet64 (PcdCpuCoreCrystalClockFrequency); +} + +/** + Converts elapsed ticks of performance counter to time in nanoseconds. + + This function converts the elapsed ticks of running performance counter to + time value in unit of nanoseconds. + + @param Ticks The number of elapsed ticks of running performance counter. + + @return The elapsed time in nanoseconds. + +**/ +UINT64 +EFIAPI +GetTimeInNanoSecond ( + IN UINT64 Ticks + ) +{ + UINT64 NanoSeconds; + UINT32 Remainder; + + // + // Ticks + // Time = --------- x 1,000,000,000 + // Frequency + // + NanoSeconds = MultU64x32 (DivU64x32Remainder (Ticks, PcdGet64 (PcdCpuCoreCrystalClockFrequency), &Remainder), 1000000000u); + + // + // Frequency < 0x100000000, so Remainder < 0x100000000, then (Remainder * 1,000,000,000) + // will not overflow 64-bit. + // + NanoSeconds += DivU64x32 (MultU64x32 ((UINT64)Remainder, 1000000000u), PcdGet64 (PcdCpuCoreCrystalClockFrequency)); + + return NanoSeconds; +} -- 2.25.1