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Diffstat (limited to 'Silicon/Intel/LewisburgPkg/Library/PeiDxeSmmPchPmcLib/PchPmcLib.c')
| -rw-r--r-- | Silicon/Intel/LewisburgPkg/Library/PeiDxeSmmPchPmcLib/PchPmcLib.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/Silicon/Intel/LewisburgPkg/Library/PeiDxeSmmPchPmcLib/PchPmcLib.c b/Silicon/Intel/LewisburgPkg/Library/PeiDxeSmmPchPmcLib/PchPmcLib.c new file mode 100644 index 0000000000..9796cb0561 --- /dev/null +++ b/Silicon/Intel/LewisburgPkg/Library/PeiDxeSmmPchPmcLib/PchPmcLib.c @@ -0,0 +1,159 @@ +/** @file + +Copyright (c) 2018, Intel Corporation. All rights reserved.<BR> +This program and the accompanying materials are licensed and made available under +the terms and conditions of the BSD License that 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/UefiBaseType.h> +#include <Library/IoLib.h> +#include <Library/DebugLib.h> +#include <Library/BaseLib.h> +#include <Library/MmPciBaseLib.h> +#include <PchAccess.h> +#include <Library/PchCycleDecodingLib.h> +#include <Library/PchPmcLib.h> + +/** + Query PCH to determine the Pm Status + NOTE: + It's matter when did platform code use this library, since some status could be cleared by write one clear. + Therefore this funciton is not always return the same result in one boot. + It's suggested that platform code read this status in the beginning of post. + For the ColdBoot case, this function only returns one case of the cold boot. Some cold boot case might + depends on the power cycle scenario and should check with different condtion. + + @param[in] PmStatus - The Pch Pm Status to be probed + + @retval Return TRUE if Status querried is Valid or FALSE if otherwise +**/ +BOOLEAN +GetPchPmStatus ( + PCH_PM_STATUS PmStatus + ) +{ + UINTN PmcRegBase; + UINT32 PchPwrmBase; + UINT32 PmConA; + UINT32 PmConB; + UINT32 GblRst0; + + PmcRegBase = MmPciBase ( + DEFAULT_PCI_BUS_NUMBER_PCH, + PCI_DEVICE_NUMBER_PCH_PMC, + PCI_FUNCTION_NUMBER_PCH_PMC + ); + PchPwrmBaseGet (&PchPwrmBase); + + PmConA = MmioRead32 (PmcRegBase + R_PCH_PMC_GEN_PMCON_A); + PmConB = MmioRead32 (PmcRegBase + R_PCH_PMC_GEN_PMCON_B); + GblRst0 = MmioRead32 (PchPwrmBase + R_PCH_PWRM_124); + + switch(PmStatus){ + case PchWarmBoot: + + if (PmConA & B_PCH_PMC_GEN_PMCON_A_MEM_SR) { + return TRUE; + } + break; + + case PwrFlr: + if (PmConB & B_PCH_PMC_GEN_PMCON_B_PWR_FLR) { + return TRUE; + } + break; + + case PwrFlrSys: + if (GblRst0 & BIT12) { + return TRUE; + } + break; + + case PwrFlrPch: + if (GblRst0 & BIT11) { + return TRUE; + } + break; + + case PchColdBoot: + /// + /// Check following conditions for cold boot. + /// + if ((GblRst0 & BIT11) && // PCHPWR_FLR + (GblRst0 & BIT12) && // SYSPWR_FLR + (!(PmConA & B_PCH_PMC_GEN_PMCON_A_MEM_SR))) { + return TRUE; + } + break; + + default: + break; + } + + return FALSE; +} + +/** + Funtion to check if Battery lost or CMOS cleared. + + @reval TRUE Battery is always present. + @reval FALSE CMOS is cleared. +**/ +BOOLEAN +EFIAPI +PchIsRtcBatteryGood ( + VOID + ) +{ + UINTN Data; + UINTN PmcBaseAddress; + + // + // Check if the CMOS battery is present + // Checks RTC_PWR_STS bit in the GEN_PMCON_3 register + // + PmcBaseAddress = MmPciBase ( + DEFAULT_PCI_BUS_NUMBER_PCH, + PCI_DEVICE_NUMBER_PCH_PMC, + PCI_FUNCTION_NUMBER_PCH_PMC + ); + + Data = MmioRead32 (PmcBaseAddress + R_PCH_PMC_GEN_PMCON_B); + if ((Data & B_PCH_PMC_GEN_PMCON_B_RTC_PWR_STS) == 0) { + return TRUE; + } + return FALSE; +} + +/** + Funtion to check if DWR occurs + + @reval TRUE DWR occurs + @reval FALSE Normal boot flow +**/ +BOOLEAN +EFIAPI +PchIsDwrFlow ( + VOID + ) +{ + EFI_STATUS Status; + UINT32 PchPwrmBase; + + Status = PchPwrmBaseGet (&PchPwrmBase); + ASSERT (PchPwrmBase != 0); + + if ((PchPwrmBase != 0) && + (MmioRead32 (PchPwrmBase + R_PCH_PWRM_HPR_CAUSE0) & B_PCH_PWRM_HPR_CAUSE0_GBL_TO_HOST)) { + return TRUE; + } else { + return FALSE; + } +} |