[edk2-devel] [edk2-platforms][PATCH v1] KabylakeSiliconPkg/PchPmcLib: Add GetSleepTypeAfterWakeup()
Chaganty, Rangasai V
rangasai.v.chaganty at intel.com
Thu Aug 12 07:22:11 UTC 2021
Reviewed-by: Sai Chaganty <rangasai.v.chaganty at intel.com>
-----Original Message-----
From: Desimone, Nathaniel L <nathaniel.l.desimone at intel.com>
Sent: Wednesday, August 11, 2021 6:22 PM
To: devel at edk2.groups.io
Cc: Desimone, Nathaniel L <nathaniel.l.desimone at intel.com>; Michael Kubacki <michael.kubacki at microsoft.com>; Chiu, Chasel <chasel.chiu at intel.com>; Chaganty, Rangasai V <rangasai.v.chaganty at intel.com>; Benjamin Doron <benjamin.doron00 at gmail.com>
Subject: [edk2-platforms][PATCH v1] KabylakeSiliconPkg/PchPmcLib: Add GetSleepTypeAfterWakeup()
From: Michael Kubacki <michael.kubacki at microsoft.com>
Adds the capability to get the system sleep type after wakeup to PchPmcLib in KabylakeSiliconPkg.
This is needed by platforms to determine the Sx resume state.
Cc: Chasel Chiu <chasel.chiu at intel.com>
Cc: Sai Chaganty <rangasai.v.chaganty at intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone at intel.com>
Cc: Benjamin Doron <benjamin.doron00 at gmail.com>
Signed-off-by: Michael Kubacki <michael.kubacki at microsoft.com>
---
Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/PchPmcLib.c | 54 ++++++++++++++++++++
Silicon/Intel/KabylakeSiliconPkg/Pch/Include/Library/PchPmcLib.h | 15 ++++++
Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/PeiDxeSmmPchPmcLib.inf | 4 ++
3 files changed, 73 insertions(+)
diff --git a/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/PchPmcLib.c b/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/PchPmcLib.c
index 790af0a7a1..3c9c4c2a2d 100644
--- a/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/PchPmcLib.c
+++ b/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/Pc
+++ hPmcLib.c
@@ -128,3 +128,57 @@ PchIsRtcBatteryGood (
}
return FALSE;
}
+
+/**
+ Returns the sleep type after system wakeup.
+
+ @param[out] SleepType Sleep type to be returned.
+
+ @retval TRUE A wake event occurred without power failure.
+ @retval FALSE Power failure occurred or not a wakeup.
+
+**/
+BOOLEAN
+EFIAPI
+GetSleepTypeAfterWakeup (
+ OUT UINT32 *SleepType
+ )
+{
+ UINT16 Pm1Sts;
+ UINT32 Pm1Cnt;
+ UINTN PmcBaseAddress;
+
+ PmcBaseAddress = MmPciBase (
+ DEFAULT_PCI_BUS_NUMBER_PCH,
+ PCI_DEVICE_NUMBER_PCH_PMC,
+ PCI_FUNCTION_NUMBER_PCH_PMC
+ );
+
+ ///
+ /// Read the ACPI registers
+ ///
+ Pm1Sts = IoRead16 (PcdGet16 (PcdAcpiBaseAddress) +
+ R_PCH_ACPI_PM1_STS); Pm1Cnt = IoRead32 (PcdGet16
+ (PcdAcpiBaseAddress) + R_PCH_ACPI_PM1_CNT);
+
+ ///
+ /// Get sleep type if a wake event occurred and there is no power
+ failure and reset /// if ((Pm1Sts & B_PCH_ACPI_PM1_STS_WAK) != 0) {
+ if ((MmioRead16 (PmcBaseAddress + R_PCH_PMC_GEN_PMCON_B) & (B_PCH_PMC_GEN_PMCON_B_RTC_PWR_STS | B_PCH_PMC_GEN_PMCON_B_PWR_FLR)) == 0) {
+ *SleepType = Pm1Cnt & B_PCH_ACPI_PM1_CNT_SLP_TYP;
+
+ return TRUE;
+ } else {
+ ///
+ /// Clear Wake Status (WAK_STS) and Sleep Type (SLP_TYP)
+ ///
+ IoWrite16 (PcdGet16 (PcdAcpiBaseAddress) + R_PCH_ACPI_PM1_STS, B_PCH_ACPI_PM1_STS_WAK);
+ Pm1Cnt &= ~B_PCH_ACPI_PM1_CNT_SLP_TYP;
+ IoWrite32 (PcdGet16 (PcdAcpiBaseAddress) + R_PCH_ACPI_PM1_CNT,
+ Pm1Cnt);
+
+ return FALSE;
+ }
+ }
+
+ return FALSE;
+}
diff --git a/Silicon/Intel/KabylakeSiliconPkg/Pch/Include/Library/PchPmcLib.h b/Silicon/Intel/KabylakeSiliconPkg/Pch/Include/Library/PchPmcLib.h
index ec98e07100..f84606d31c 100644
--- a/Silicon/Intel/KabylakeSiliconPkg/Pch/Include/Library/PchPmcLib.h
+++ b/Silicon/Intel/KabylakeSiliconPkg/Pch/Include/Library/PchPmcLib.h
@@ -41,4 +41,19 @@ PchIsRtcBatteryGood (
VOID
);
+/**
+ Returns the sleep type after system wakeup.
+
+ @param[out] SleepType Sleep type to be returned.
+
+ @retval TRUE A wake event occurred without power failure.
+ @retval FALSE Power failure occurred or not a wakeup.
+
+**/
+BOOLEAN
+EFIAPI
+GetSleepTypeAfterWakeup (
+ OUT UINT32 *SleepType
+ );
+
#endif // _PCH_PMC_LIB_H_
diff --git a/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/PeiDxeSmmPchPmcLib.inf b/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/PeiDxeSmmPchPmcLib.inf
index 8b46a59b67..1e6103f4ca 100644
--- a/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/PeiDxeSmmPchPmcLib.inf
+++ b/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiDxeSmmPchPmcLib/Pe
+++ iDxeSmmPchPmcLib.inf
@@ -33,5 +33,9 @@ MdePkg/MdePkg.dec
KabylakeSiliconPkg/SiPkg.dec
+[Pcd]
+gSiPkgTokenSpaceGuid.PcdAcpiBaseAddress
+
+
[Sources]
PchPmcLib.c
--
2.29.2.windows.2
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