From: Chris Co <Christopher.Co@microsoft.com>
To: "edk2-devel@lists.01.org" <edk2-devel@lists.01.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Leif Lindholm <leif.lindholm@linaro.org>,
Michael D Kinney <michael.d.kinney@intel.com>
Subject: [PATCH edk2-platforms 15/27] Silicon/NXP: Add i.MX6 GPT Timer library
Date: Fri, 21 Sep 2018 08:26:07 +0000 [thread overview]
Message-ID: <20180921082542.35768-16-christopher.co@microsoft.com> (raw)
In-Reply-To: <20180921082542.35768-1-christopher.co@microsoft.com>
This adds support for GPT Timer on NXP i.MX6 SoCs.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Christopher Co <christopher.co@microsoft.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
---
Silicon/NXP/iMX6Pkg/Include/iMX6Timer.h | 24 ++
Silicon/NXP/iMX6Pkg/Library/TimerLib/TimerLib.c | 246 ++++++++++++++++++++
Silicon/NXP/iMX6Pkg/Library/TimerLib/TimerLib.inf | 45 ++++
3 files changed, 315 insertions(+)
diff --git a/Silicon/NXP/iMX6Pkg/Include/iMX6Timer.h b/Silicon/NXP/iMX6Pkg/Include/iMX6Timer.h
new file mode 100644
index 000000000000..fbac9d2a61c0
--- /dev/null
+++ b/Silicon/NXP/iMX6Pkg/Include/iMX6Timer.h
@@ -0,0 +1,24 @@
+/** @file
+*
+* Copyright (c) 2018 Microsoft Corporation. All rights reserved.
+*
+* 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.
+*
+**/
+
+#ifndef _IMX6_TIMER_H_
+#define _IMX6_TIMER_H_
+
+RETURN_STATUS
+EFIAPI
+TimerConstructor (
+ VOID
+ );
+
+#endif /* _IMX6_TIMER_H_ */
diff --git a/Silicon/NXP/iMX6Pkg/Library/TimerLib/TimerLib.c b/Silicon/NXP/iMX6Pkg/Library/TimerLib/TimerLib.c
new file mode 100644
index 000000000000..fa55cee242ef
--- /dev/null
+++ b/Silicon/NXP/iMX6Pkg/Library/TimerLib/TimerLib.c
@@ -0,0 +1,246 @@
+/** @file
+*
+* Copyright (c) 2018 Microsoft Corporation. All rights reserved.
+*
+* 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>
+#include <Uefi.h>
+
+#include <Library/ArmLib.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/PcdLib.h>
+#include <Library/TimerLib.h>
+
+#include <common_gpt.h>
+#include <iMX6.h>
+#include <iMX6Timer.h>
+
+RETURN_STATUS
+EFIAPI
+TimerConstructor (
+ VOID
+ )
+{
+ PCSP_GPT_REGS pGpt;
+ UINT32 FreqPreScale;
+
+ pGpt = (PCSP_GPT_REGS)CSP_BASE_REG_PA_GPT;
+
+ ASSERT (SOC_OSC_FREQUENCY_REF_HZ >= PcdGet32 (PcdArmArchTimerFreqInHz));
+
+ // Calculate the scale factor since we are using the 24Mhz oscillator
+ // as reference.
+ FreqPreScale = SOC_OSC_FREQUENCY_REF_HZ / PcdGet32 (PcdArmArchTimerFreqInHz);
+ ASSERT (FreqPreScale <= (1 << GPT_PR_PRESCALER_WID));
+
+ // Set the frequency scale
+ MmioWrite32 ((UINTN)&pGpt->PR, FreqPreScale - 1);
+
+#if defined(CPU_IMX6DQ) || defined (CPU_IMX6DQP)
+ // Set GPT configuration:
+ // - GPT Enabled
+ // - Use the 24Mhz oscillator source
+ MmioWrite32 ((UINTN)&pGpt->CR,
+ (GPT_CR_EN_ENABLE << GPT_CR_EN_LSH) |
+ (GPT_CR_CLKSRC_CLK24M << GPT_CR_CLKSRC_LSH));
+#elif defined(CPU_IMX6SDL) || defined(CPU_IMX6SX)
+ // Set GPT configuration:
+ // - GPT Enabled
+ // - Enable 24 Mhz Oscillator
+ // - Use the 24Mhz oscillator source
+ MmioWrite32 ((UINTN)&pGpt->CR,
+ (GPT_CR_EN_ENABLE << GPT_CR_EN_LSH) |
+ (GPT_CR_EN_24M_ENABLE << GPT_CR_EN_24M_LSH) |
+ (GPT_CR_CLKSRC_CLK24M << GPT_CR_CLKSRC_LSH));
+#else
+#error CPU Preprocessor Flag Not Defined
+#endif
+
+ return EFI_SUCCESS;
+}
+
+/**
+ 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 The value of MicroSeconds inputted.
+
+**/
+UINTN
+EFIAPI
+MicroSecondDelay (
+ IN UINTN MicroSeconds
+ )
+{
+ UINT64 TimerTicks64;
+ UINT32 CurCounterRead;
+ UINT32 PrevCounterRead;
+ UINT64 CountOffset;
+
+ // Convert uSec delay to counter ticks:
+ TimerTicks64 = ((UINT64)MicroSeconds * PcdGet32 (
+ PcdArmArchTimerFreqInHz)) / 1000000U;
+ CurCounterRead = (UINT32)GetPerformanceCounter();
+ PrevCounterRead = CurCounterRead;
+ TimerTicks64 += (UINT64)CurCounterRead;
+ CountOffset = 0;
+
+ // GPT is a 32bit counter, thus we need to handle rollover cases.
+ while (((UINT64)CurCounterRead + CountOffset) < TimerTicks64) {
+ CurCounterRead = (UINT32)GetPerformanceCounter();
+ if (CurCounterRead < PrevCounterRead) {
+ CountOffset += 0x100000000;
+ }
+ PrevCounterRead = CurCounterRead;
+ }
+
+ 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 The value of NanoSeconds inputted.
+
+**/
+UINTN
+EFIAPI
+NanoSecondDelay (
+ IN UINTN NanoSeconds
+ )
+{
+ if (NanoSeconds < (0xffffffff - 999)) {
+ NanoSeconds += 999;
+ }
+ MicroSecondDelay (NanoSeconds / 1000);
+
+ return 0;
+}
+
+/**
+ 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
+ )
+{
+ PCSP_GPT_REGS pGpt;
+
+ pGpt = (PCSP_GPT_REGS)CSP_BASE_REG_PA_GPT;
+ return MmioRead32 ((UINTN)(&pGpt->CNT));
+}
+
+/**
+ 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 = 0x0;
+ }
+
+ if (EndValue != NULL) {
+ *EndValue = MAX_UINT64;
+ }
+
+ return PcdGet32 (PcdArmArchTimerFreqInHz);
+}
+
+/**
+ 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;
+ UINT32 TimerFreq;
+
+ TimerFreq = PcdGet32 (PcdArmArchTimerFreqInHz);
+
+ // Ticks
+ // Time = --------- x 1,000,000,000
+ // Frequency
+ NanoSeconds = MultU64x32 (
+ DivU64x32Remainder (
+ Ticks,
+ TimerFreq,
+ &Remainder),
+ 1000000000U
+ );
+
+ // Frequency < 0x100000000, so Remainder < 0x100000000,
+ // then (Remainder * 1,000,000,000) will not overflow 64-bit.
+ NanoSeconds += DivU64x32 (
+ MultU64x32 (
+ (UINT64) Remainder,
+ 1000000000U),
+ TimerFreq
+ );
+
+ return NanoSeconds;
+}
diff --git a/Silicon/NXP/iMX6Pkg/Library/TimerLib/TimerLib.inf b/Silicon/NXP/iMX6Pkg/Library/TimerLib/TimerLib.inf
new file mode 100644
index 000000000000..4716dee65a5d
--- /dev/null
+++ b/Silicon/NXP/iMX6Pkg/Library/TimerLib/TimerLib.inf
@@ -0,0 +1,45 @@
+## @file
+#
+# NULL instance of Timer Library as a template.
+#
+# A non-functional instance of the Timer Library that can be used as a template
+# for the implementation of a functional timer library instance. This library
+# instance can also be used to test build DXE, Runtime, DXE SAL, and DXE SMM
+# modules that require timer services as well as EBC modules that require
+# timer services.
+#
+# Copyright (c) 2018 Microsoft Corporation. All rights reserved.
+# Copyright (c) 2007 - 2008, Intel Corporation.
+#
+# 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.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x0001001A
+ BASE_NAME = iMX6TimerLib
+ FILE_GUID = 2956C1A6-6FF8-4763-9FD8-D45892E025E3
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = TimerLib
+
+[Sources.common]
+ TimerLib.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ MdePkg/MdePkg.dec
+ Silicon/NXP/iMX6Pkg/iMX6Pkg.dec
+
+[LibraryClasses]
+ DebugLib
+ IoLib
+
+[Pcd]
+ gArmTokenSpaceGuid.PcdArmArchTimerFreqInHz
--
2.16.2.gvfs.1.33.gf5370f1
next prev parent reply other threads:[~2018-09-21 8:26 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-21 8:25 [PATCH edk2-platforms 00/27] Import Hummingboard Edge platform for Windows IoT Core Chris Co
2018-09-21 8:25 ` [PATCH edk2-platforms 01/27] Platform/Microsoft: Add OpteeClientPkg dec Chris Co
2018-10-31 20:43 ` Leif Lindholm
2018-11-01 10:55 ` Sumit Garg
2018-11-02 0:41 ` Chris Co
2018-11-02 5:24 ` Sumit Garg
2018-11-02 23:55 ` Chris Co
2018-11-05 10:07 ` Sumit Garg
2018-11-06 1:53 ` Chris Co
2018-11-06 11:09 ` Sumit Garg
2018-09-21 8:25 ` [PATCH edk2-platforms 02/27] Platform/Microsoft: Add SdMmc Dxe Driver Chris Co
2018-09-21 8:25 ` [PATCH edk2-platforms 04/27] Silicon/NXP: Add iMXPlatformPkg dec Chris Co
2018-09-21 8:25 ` [PATCH edk2-platforms 03/27] Platform/Microsoft: Add MsPkg Chris Co
2018-10-31 21:00 ` Leif Lindholm
2018-09-21 8:25 ` [PATCH edk2-platforms 05/27] Silicon/NXP: Add UART library support for i.MX platforms Chris Co
2018-11-01 8:59 ` Leif Lindholm
2018-11-02 1:46 ` Chris Co
2018-09-21 8:25 ` [PATCH edk2-platforms 06/27] Silicon/NXP: Add I2C " Chris Co
2018-11-01 17:53 ` Leif Lindholm
2018-09-21 8:25 ` [PATCH edk2-platforms 07/27] Silicon/NXP: Add i.MX display library support Chris Co
2018-11-01 18:05 ` Leif Lindholm
2018-11-29 0:55 ` Chris Co
2018-09-21 8:25 ` [PATCH edk2-platforms 08/27] Silicon/NXP: Add Virtual RTC support for i.MX platform Chris Co
2018-12-15 13:26 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 10/27] Silicon/NXP: Add iMX6Pkg dec Chris Co
2018-11-01 18:25 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 09/27] Silicon/NXP: Add headers for SoC-specific i.MX packages to use Chris Co
2018-11-01 18:20 ` Leif Lindholm
2018-12-01 0:22 ` Chris Co
2018-12-03 9:42 ` Leif Lindholm
2018-12-04 1:44 ` Chris Co
2018-12-04 9:33 ` Ard Biesheuvel
2018-12-04 12:22 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 11/27] Silicon/NXP: Add i.MX6 SoC header files Chris Co
2018-12-13 17:11 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 12/27] Silicon/NXP: Add i.MX6 I/O MUX library Chris Co
2018-11-08 18:00 ` Leif Lindholm
2018-12-04 1:41 ` Chris Co
2018-09-21 8:26 ` [PATCH edk2-platforms 13/27] Silicon/NXP: Add support for iMX SDHC Chris Co
2018-12-05 10:31 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 14/27] Silicon/NXP: Add i.MX6 GPT and EPIT timer headers Chris Co
2018-11-08 18:14 ` Leif Lindholm
2018-12-04 2:06 ` Chris Co
2018-12-04 12:58 ` Leif Lindholm
2018-09-21 8:26 ` Chris Co [this message]
2018-12-13 17:26 ` [PATCH edk2-platforms 15/27] Silicon/NXP: Add i.MX6 GPT Timer library Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 16/27] Silicon/NXP: Add i.MX6 Timer DXE driver Chris Co
2018-12-13 17:33 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 17/27] Silicon/NXP: Add i.MX6 USB Phy Library Chris Co
2018-12-14 17:10 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 18/27] Silicon/NXP: Add i.MX6 Clock Library Chris Co
2018-12-14 18:12 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 19/27] Silicon/NXP: Add i.MX6 ACPI tables Chris Co
2018-12-14 19:53 ` Leif Lindholm
2018-12-17 11:14 ` Ard Biesheuvel
2019-01-08 21:43 ` Chris Co
2019-01-29 14:09 ` Ard Biesheuvel
2018-09-21 8:26 ` [PATCH edk2-platforms 20/27] Silicon/NXP: Add i.MX6 Board init library Chris Co
2018-12-14 20:12 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 21/27] Silicon/NXP: Add i.MX6 PCIe DXE driver Chris Co
2018-12-14 21:59 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 23/27] Silicon/NXP: Add i.MX6 Smbios Driver Chris Co
2018-12-14 23:07 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 22/27] Silicon/NXP: Add i.MX6 GOP driver Chris Co
2018-12-14 22:37 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 24/27] Silicon/NXP: Add i.MX6 common dsc and fdf files Chris Co
2018-12-14 23:36 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 25/27] Platform/Solidrun: Add Hummingboard Peripheral Initialization Chris Co
2018-12-15 12:12 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 26/27] Platform/SolidRun: Add i.MX 6Quad Hummingboard Edge ACPI tables Chris Co
2018-12-15 12:19 ` Leif Lindholm
2018-09-21 8:26 ` [PATCH edk2-platforms 27/27] Platform/Solidrun: Add i.MX 6Quad Hummingboard Edge dsc and fdf files Chris Co
2018-12-15 12:28 ` Leif Lindholm
2018-12-15 13:32 ` [PATCH edk2-platforms 00/27] Import Hummingboard Edge platform for Windows IoT Core Leif Lindholm
2018-12-19 18:28 ` Chris Co
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-list from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180921082542.35768-16-christopher.co@microsoft.com \
--to=devel@edk2.groups.io \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox