Vlv2TbltDevicePkg/Library/PlatformCmosLib/PlatformCmosLib.c

   1 /*++
   2
   3 Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
   4
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7
   8
   9
  10 Module Name:
  11
  12   CmosTable.h
  13
  14 Abstract:
  15
  16 --*/
  17
  18 #include <Base.h>
  19 #include <Library/IoLib.h>
  20 #include <Library/PlatformCmosLib.h>
  21 #include "CmosMap.h"
  22 #include <PchAccess.h>
  23 #include "PlatformBaseAddresses.h"
  24
  25 #define DEFAULT_VALUE          0
  26 #define  DEFAULT_ATTRIBUTES     0
  27 #define  EXCLUDE_FROM_CHECKSUM   CMOS_ATTRIBUTE_EXCLUDE_FROM_CHECKSUM
  28
  29 #define CMOS_DEBUG_PRINT_LEVEL_DEFAULT_VALUE      0x46   // EFI_D_WARN|EFI_D_INFO|EFI_D_LOAD
  30 #define CMOS_DEBUG_PRINT_LEVEL_3_DEFAULT_VALUE    0x80   // EFI_D_ERROR
  31
  32 //
  33 // Add the CMOS entry below
  34 //
  35 CMOS_ENTRY mCmosTable[] = {
  36 { CPU_HT_POLICY, CPU_HT_POLICY_ENABLED, EXCLUDE_FROM_CHECKSUM },
  37 { TPM_POLICY, TPM_POLICY_ENABLED, DEFAULT_ATTRIBUTES },
  38 { CMOS_LCDPANELTYPE_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  39 { CMOS_LCDPANELSCALING_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  40 { CMOS_IGDBOOTTYPE_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  41 { CMOS_BACKLIGHT_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  42 { CMOS_LFP_PANEL_COLOR_DEPTH_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  43 { CMOS_EDP_ACTIVE_LFP_CONFIG_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  44 { CMOS_PRIMARY_DISPLAY_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  45 { CMOS_IGD_DISPLAY_PIPE_B_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  46 { CMOS_SDVOPANELTYPE_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  47 { CMOS_PLATFORM_RESET_OS, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  48 { CMOS_CPU_BSP_SELECT, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  49 { CMOS_CPU_RATIO_OFFSET, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  50 { CMOS_ICH_PORT80_OFFSET, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  51 { CMOS_MAXRATIO_CONFIG_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  52 { RTC_ADDRESS_CENTURY, RTC_ADDRESS_CENTURY_DEFAULT, CMOS_ATTRIBUTE_EXCLUDE_FROM_CHECKSUM },
  53 { CMOS_POST_CODE_BREAK_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  54 { CMOS_POST_CODE_BREAK_1_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  55 { CMOS_POST_CODE_BREAK_2_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  56 { CMOS_POST_CODE_BREAK_3_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  57 { CMOS_DEBUG_PRINT_LEVEL_REG, CMOS_DEBUG_PRINT_LEVEL_DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  58 { CMOS_DEBUG_PRINT_LEVEL_1_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  59 { CMOS_DEBUG_PRINT_LEVEL_2_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  60 { CMOS_DEBUG_PRINT_LEVEL_3_REG, CMOS_DEBUG_PRINT_LEVEL_3_DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  61 };
  62
  63 /**
  64   Funtion to return platform CMOS entry.
  65
  66   @param [out]  CmosEntry  Platform CMOS entry.
  67
  68   @param [out]  CmosEntryCount Number of platform CMOS entry.
  69
  70   @return Status.
  71 **/
  72 RETURN_STATUS
  73 EFIAPI
  74 GetPlatformCmosEntry (
  75   OUT CMOS_ENTRY  **CmosEntry,
  76   OUT UINTN       *CmosEntryCount
  77   )
  78 {
  79   *CmosEntry = mCmosTable;
  80   *CmosEntryCount = sizeof(mCmosTable)/sizeof(mCmosTable[0]);
  81   return RETURN_SUCCESS;
  82 }
  83
  84 /**
  85   Function to check if Battery lost or CMOS cleared.
  86
  87   @reval TRUE  Battery is always present.
  88   @reval FALSE CMOS is cleared.
  89 **/
  90 BOOLEAN
  91 EFIAPI
  92 CheckCmosBatteryStatus (
  93   VOID
  94   )
  95 {
  96   //
  97   // Check if the CMOS battery is present
  98   // Checks RTC_PWR_STS bit in the GEN_PMCON_1 register
  99   //
 100
 101   if ((MmioRead8 (PMC_BASE_ADDRESS + R_PCH_PMC_GEN_PMCON_1) & B_PCH_PMC_GEN_PMCON_RTC_PWR_STS) == 0) {
 102     return TRUE;
 103   } else {
 104     return FALSE;
 105   }
 106 }