Vlv2TbltDevicePkg/Library/PlatformCmosLib/PlatformCmosLib.c

   1 /*++
   2
   3 Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
   4
   5   This program and the accompanying materials are licensed and made available under
   6   the terms and conditions of the BSD License that accompanies this distribution.
   7   The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php.
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13
  14
  15 Module Name:
  16
  17   CmosTable.h
  18
  19 Abstract:
  20
  21 --*/
  22
  23 #include <Base.h>
  24 #include <Library/IoLib.h>
  25 #include <Library/PlatformCmosLib.h>
  26 #include "CmosMap.h"
  27 #include <PchAccess.h>
  28 #include "PlatformBaseAddresses.h"
  29
  30 #define DEFAULT_VALUE          0
  31 #define  DEFAULT_ATTRIBUTES     0
  32 #define  EXCLUDE_FROM_CHECKSUM   CMOS_ATTRIBUTE_EXCLUDE_FROM_CHECKSUM
  33
  34 #define CMOS_DEBUG_PRINT_LEVEL_DEFAULT_VALUE      0x46   // EFI_D_WARN|EFI_D_INFO|EFI_D_LOAD
  35 #define CMOS_DEBUG_PRINT_LEVEL_3_DEFAULT_VALUE    0x80   // EFI_D_ERROR
  36
  37 //
  38 // Add the CMOS entry below
  39 //
  40 CMOS_ENTRY mCmosTable[] = {
  41 { CPU_HT_POLICY, CPU_HT_POLICY_ENABLED, EXCLUDE_FROM_CHECKSUM },
  42 { TPM_POLICY, TPM_POLICY_ENABLED, DEFAULT_ATTRIBUTES },
  43 { CMOS_LCDPANELTYPE_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  44 { CMOS_LCDPANELSCALING_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  45 { CMOS_IGDBOOTTYPE_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  46 { CMOS_BACKLIGHT_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  47 { CMOS_LFP_PANEL_COLOR_DEPTH_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  48 { CMOS_EDP_ACTIVE_LFP_CONFIG_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  49 { CMOS_PRIMARY_DISPLAY_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  50 { CMOS_IGD_DISPLAY_PIPE_B_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  51 { CMOS_SDVOPANELTYPE_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  52 { CMOS_PLATFORM_RESET_OS, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  53 { CMOS_CPU_BSP_SELECT, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  54 { CMOS_CPU_RATIO_OFFSET, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  55 { CMOS_ICH_PORT80_OFFSET, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  56 { CMOS_MAXRATIO_CONFIG_REG, DEFAULT_VALUE, DEFAULT_ATTRIBUTES },
  57 { RTC_ADDRESS_CENTURY, RTC_ADDRESS_CENTURY_DEFAULT, CMOS_ATTRIBUTE_EXCLUDE_FROM_CHECKSUM },
  58 { CMOS_POST_CODE_BREAK_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  59 { CMOS_POST_CODE_BREAK_1_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  60 { CMOS_POST_CODE_BREAK_2_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  61 { CMOS_POST_CODE_BREAK_3_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  62 { CMOS_DEBUG_PRINT_LEVEL_REG, CMOS_DEBUG_PRINT_LEVEL_DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  63 { CMOS_DEBUG_PRINT_LEVEL_1_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  64 { CMOS_DEBUG_PRINT_LEVEL_2_REG, DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  65 { CMOS_DEBUG_PRINT_LEVEL_3_REG, CMOS_DEBUG_PRINT_LEVEL_3_DEFAULT_VALUE, EXCLUDE_FROM_CHECKSUM },
  66 };
  67
  68 /**
  69   Funtion to return platform CMOS entry.
  70
  71   @param [out]  CmosEntry  Platform CMOS entry.
  72
  73   @param [out]  CmosEntryCount Number of platform CMOS entry.
  74
  75   @return Status.
  76 **/
  77 RETURN_STATUS
  78 EFIAPI
  79 GetPlatformCmosEntry (
  80   OUT CMOS_ENTRY  **CmosEntry,
  81   OUT UINTN       *CmosEntryCount
  82   )
  83 {
  84   *CmosEntry = mCmosTable;
  85   *CmosEntryCount = sizeof(mCmosTable)/sizeof(mCmosTable[0]);
  86   return RETURN_SUCCESS;
  87 }
  88
  89 /**
  90   Function to check if Battery lost or CMOS cleared.
  91
  92   @reval TRUE  Battery is always present.
  93   @reval FALSE CMOS is cleared.
  94 **/
  95 BOOLEAN
  96 EFIAPI
  97 CheckCmosBatteryStatus (
  98   VOID
  99   )
 100 {
 101   //
 102   // Check if the CMOS battery is present
 103   // Checks RTC_PWR_STS bit in the GEN_PMCON_1 register
 104   //
 105
 106   if ((MmioRead8 (PMC_BASE_ADDRESS + R_PCH_PMC_GEN_PMCON_1) & B_PCH_PMC_GEN_PMCON_RTC_PWR_STS) == 0) {
 107     return TRUE;
 108   } else {
 109     return FALSE;
 110   }
 111 }