90 lines
4.2 KiB
C
90 lines
4.2 KiB
C
/** @file
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Provide OEM to switch the CSM16 function.
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;******************************************************************************
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;* Copyright (c) 2018, Insyde Software Corp. All Rights Reserved.
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;*
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;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
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;* transmit, broadcast, present, recite, release, license or otherwise exploit
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;* any part of this publication in any form, by any means, without the prior
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;* written permission of Insyde Software Corporation.
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;*
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;******************************************************************************
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*/
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#include <PiPei.h>
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#include <Library/CmosLib.h>
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#include <Library/HobLib.h>
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#include <Library/DxeOemSvcKernelLib.h>
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/**
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Provide OEM to switch the CSM16 function. Current functions of CSM16 as following:
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Bit Function Disable bit (set to 0) Enable bit (set to 1)
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--------------------------------------------------------------------------------------------------------------
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0, Prepare LegacyTable(BDA/EDBA/SMBIOS data/ 0: Disable 1: Enable
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ACPI table) Before UEFI Boot
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1, POST_TIME_DISABLE_KEYBOARD 0: Enable KeyboardReset 1: Disable KeyboardReset
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2, POST_TIME_DISABLE_KEYBOARD_BEEP 0: Enable KeyboardBeep 1: Disable KeyboardBeep
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3, LEGACY_AUTO_BOOT_RETRY 0: Disable AutoBootRetry 1: Enable AutoBootRetry
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4, ODD_IMAGE_DETECT 0: Detect ODD image before INT19 1: Detect ODD image after INT19
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5, SET_VGAMODE_BEFORE_INT19 0: Disable 1: Set Vga mode before INT19
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6, ENABLE_A20_BEFORE_INT19 0: Disable 1: Enable A20 before INT19
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7, A20_GATE_SUPPORT 0: supported on keyboard controller 1: supported with bit 1 of I/O port 92h
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8, MONITORKEY_SUPPORT_IN_OPROM 0: Disable MonitorKey during dispatch OPROM 1: Enable MonitorKey during dispatch OPROM
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9 PAUSE_KEY_SUPPORT 0: Enable Pause Key 1: Disable Pause Key
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10, SMBIOS_DATA_LOCATE 0: Locate at E segment 1: Locate at F segment
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11 ~ 13 For PMM high memory size
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if the value is 0-> 4 MB (default)
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if the value is 1-> 2 to the (4 + 1) = 32 MB
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if the value is 2-> 2 to the (4 + 2) = 64 MB
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if the value is 3-> 2 to the (4 + 3) = 128 MB
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if the value is 4-> 2 to the (4 + 4) = 256 MB
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if the value is 5-> 2 to the (4 + 5) = 512 MB
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if the value is 6-> 2 to the (4 + 6) = 1024 MB
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if the value is 7-> 2 to the (4 + 7) = 2048 MB
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14 ~ 15 RESERVED
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--------------------------------------------------------------------------------------------------------------
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@param *CSM16OemSwitchPtr Point to the CSM16OemSwitch of H2O_TABLE in LegacyBios.
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@retval EFI_MEDIA_CHANGED Set the CSM16 OEM switch success.
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@retval Others Base on OEM design.
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**/
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EFI_STATUS
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OemSvcCsm16ReferSwitch (
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IN OUT UINT16 *CSM16OemSwitchPtr
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)
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{
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EFI_BOOT_MODE BootMode;
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CSM16_OEM_CONFIG LocalConfig;
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LocalConfig.CONFIG = (*CSM16OemSwitchPtr);
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BootMode = BOOT_WITH_FULL_CONFIGURATION;
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BootMode = GetBootModeHob ();
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switch (BootMode) {
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case BOOT_WITH_MINIMAL_CONFIGURATION:
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case BOOT_ASSUMING_NO_CONFIGURATION_CHANGES:
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LocalConfig.Config.SET_VGAMODE_BEFORE_INT19 = 0;
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break;
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case BOOT_ON_FLASH_UPDATE:
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case BOOT_IN_RECOVERY_MODE:
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LocalConfig.Config.DisableKeyboardReset = 1;
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break;
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case BOOT_WITH_FULL_CONFIGURATION:
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case BOOT_WITH_FULL_CONFIGURATION_PLUS_DIAGNOSTICS:
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case BOOT_WITH_DEFAULT_SETTINGS:
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default:
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LocalConfig.Config.SET_VGAMODE_BEFORE_INT19 = 1;
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break;
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}
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(*CSM16OemSwitchPtr) = LocalConfig.CONFIG;
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return EFI_SUCCESS;
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}
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