BIOS 基础培训

1、WHAT IS BIOSBIOS - SWSystem IdentificationBIOS versionSystem IDService tagAsset tagEPPIDBIOS updateDOS flashWindows flashLinux flashSetup programMemory infoProcessor infoHDD infoSystem infoSetup itemsSetup items defaultBoot orderSecurityAdministrator passwordHDD passwordSystem passwordSplash screenB

2、IOS logoEnergy star logoLogo replacementDiagnostic SMBIOSPSABIOS test interfaceDiag logPAIDDell SMBIOSQuickSet supportKeyboard backlightEBLBCDDisplay switchWifi/RadioError messageFactoryMdiag toolsOEM toolsACPIBIOS - HWChipset featureCPU bring upNorthbridge bring upSouthbridge bring upPlatform featu

3、reAC & Battery supportAC detectIPCCBattery health meterBattery authenticationBattery T-BOMBattery chargeLED supportPower LEDBattery LEDLED behaviorPeripheral devices controlUSB PowershareODD bootFFS supportZPODD supportPort disablementBoot disablementKeyboard Mouse MMBMultimedia key v.s. Functio

4、n keyTouchpad behaviorMedia buttonPower managementWakeup eventSystem power mgtLID switch behaviorThermal managementPassive thermal mgtActive thermal mgtBIOS HARDWARE BIOS POST in HW point of viewBIOS to HW devices communication method CMOS PCI BIOS EC PCIEDevice power management conceptCPUNorthbridg

5、eSouthbridgeECRAM 1RAM 2GPUHDDHDDODDLANWLANWWANBluetoothExpress CardKeyboardTouchpadFanThermalAC/DCLEDUSB connectorsPanelCRTHDMIDPCard ReaderAudioMEBIOS/ME ROMCPUNorthbridgeGFXSouthbridgeMEECME firmware init feature bring up CPU early init microcode update, cache as RAM enableBIOS to EC channel esta

6、blishment Chipset early init Resource designationLPC BusSODIMM 1SODIMM 2If S5/S4, RAM module init (MRC code)If S3 resume, do MCH data restore from SPI ROMCPUNorthbridgeSouthbridgeRAM 1RAM 2GPUHDDHDDODDLANWLANWWANBluetoothExpress CardUSB connectorsPanelCRTHDMIDPCard ReaderAudioME USB 3.0 legacy EC to

7、 BIOS event under legacy OSGPIO 0 15GPIO 16 31GPIO 32 47GPIO 48 63GPIO 64 75GPIO_USE_SELGP_IO_SELGP_LVLGPO_BLINKXXXGPI_NMI_ENXXXXGPI_INVXXXXGPIO_ROUTXXXXPCHECBIOS SMI handlerLPC BUSSMICPU1.EC puts the requested command in the BIOS-EC channel through LPC BUS2.EC manipulates a pulse to trigger the SMI

8、 event3.CPU goes to SMM mode, and calls the BIOS SMI handler4.BIOS SMI handler retrieves the command from the BIOS-EC channel from LPC BUS(Brightness control, LID control, CPU thermal, ODD eject)IO space 0IO space 1AddressDataISA protocolLegacy PCICompatible PCIEBIOS - ECCMOSIO Space256 BytesLow 256

9、 Bytes128 Bytes x 2Real memoryDRAMFFFFFFFFhDRAM boundary00000000hPCIE memory spaceF8000000h(Base address)PCHInterpreterBase addressPCIE deviceRegistersspaceBIOSEC9119106C6866626460IO SpaceLPC BUSPCH9119106C6866626460IO SpaceData0Data1Data2EC memory spaceEC handlerBIOSInterpreter EC to BIOS event und

10、er ACPI OS dGPU wakeup in Optimus system USB wakeup PCIE wakeup RTC wakeupECBIOS SCI handlerLPC BUSSCIACPI OS1.EC puts the requested command in the BIOS-EC channel through LPC BUS2.EC manipulates a pulse to trigger the SCI event3.Windows acknowledges the event, and calls the BIOS ACPI code handler4.

11、BIOS ACPI code interprets the command, and calls the corresponding function entryPCHPCHPCIE devicesUSB deviceswakeup controlACPI OS drivers EC1.BIOS ACPI follows the protocol to setup the wakeup capability of devices2.Windows detects and setup the wakeup control of the devices through BIOS ACPIRTCAC

12、PI ECAdapterBatteryKeyboardOS drivers AC and DC status is periodically updated by EC Sleep mode switch Wifi function enable/disable Display swtich ODD ejectVolume up/down/muteBrightness up/down LID event notifyQuickSetCMOSDMIECAdapterBatterySMI QS and BIOS follows the protocol to communicate with ea

13、ch other One QS can be installed on different platform because of the above feature QS sends the command to BIOS. BIOS retrieves the request, and implement the corresponding task. Then, return the result to QS Wifi configuration Bluetooth configuration Touchpad enable/disable QS also updates the sys

14、tem status which are triggered by BIOS/EC Display device change Brightness change Volume change Keyboard backlightSPI ROMBIOS SERVICE PanelAdapterBatterychargerFanThermalSensorDevice detectODDHDDKeyboardTouchpadFANSpeakerLCDCameraAudioMinicardPower buttonSmart cardetc.DockkeyboardDevice detectODDHDDKeyboardTouchpadFANSpeakerLCDCameraAudioMinicardPower buttonSmart cardetc.CPUMemoryDevice testODDHD