140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/** @file
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Provide OEM to define the post key corresponding to the behavior of utility choosing (SCU or Boot Manager).
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;******************************************************************************
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;* Copyright (c) 2014 - 2020, Insyde Software Corporation. 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 <PostKey.h>
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#include <Library/PcdLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/DxeOemSvcKernelLib.h>
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//
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// These must reflect order in KEY_ELEMENT
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//
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#define F1_KEY_BIT 0x01
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#define F2_KEY_BIT 0x02
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#define DEL_KEY_BIT 0x04
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#define F10_KEY_BIT 0x08
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#define F12_KEY_BIT 0x10
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#define ESC_KEY_BIT 0x20
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#define UP_ARROW_KEY_BIT 0x40
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#define F3_KEY_BIT 0x80
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#define F9_KEY_BIT 0x100
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//
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// module variables
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//
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SCAN_TO_OPERATION *mPostKeyToOperation = NULL;
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UINTN mPostOperationCount = 0;
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//
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// helper function prototypes
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//
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VOID
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InitialPostkeyTable (
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VOID
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);
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/**
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Initialize module variable mPostKeyToOperation.
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@param None
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@retval None
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**/
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VOID
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InitialPostkeyTable (
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VOID
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)
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{
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UINTN Index;
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UINTN OldPostOperationCount;
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Index = 0;
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if (mPostKeyToOperation != NULL) {
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return;
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}
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//
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// Add the end of table.
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//
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OldPostOperationCount = mPostOperationCount;
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mPostOperationCount++;
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mPostKeyToOperation = ReallocatePool (
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OldPostOperationCount*sizeof(SCAN_TO_OPERATION),
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sizeof(SCAN_TO_OPERATION)*mPostOperationCount,
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mPostKeyToOperation
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);
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if (mPostKeyToOperation != NULL) {
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mPostKeyToOperation[Index].KeyBit = 0;
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mPostKeyToOperation[Index].ScanCode = SCAN_NULL;
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mPostKeyToOperation[Index].PostOperation = NO_OPERATION;
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Index++;
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}
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}
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/**
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This OemService provides OEM to define the post key corresponding to the behavior of utility choosing (SCU or Boot Manager).
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@param[in] KeyDetected A bit map of the monitored keys found.
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Bit N corresponds to KeyList[N] as provided by the
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GetUsbPlatformOptions () API of UsbLegacy protocol.
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@param[in] ScanCode The Scan Code.
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@param[out] *PostOperation Point to the operation flag which imply the behavior of utility choosing in post time. For example: choose the SCU or Boot Manager.
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@retval EFI_MEDIA_CHANGED Get post operation success.
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@retval EFI_SUCCESS Get post operation failed.
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@retval Others Base on OEM design.
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**/
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EFI_STATUS
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OemSvcInstallPostKeyTable (
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IN UINTN KeyDetected,
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IN UINT16 ScanCode,
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OUT UINTN *PostOperation
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)
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{
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UINTN Index;
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UINTN PostOperationCount;
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SCAN_TO_OPERATION *PostKeyToOperation;
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InitialPostkeyTable ();
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PostOperationCount = mPostOperationCount;
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PostKeyToOperation = mPostKeyToOperation;
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for (Index = 0; Index < PostOperationCount; Index++) {
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//
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// Search table
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//
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if ((KeyDetected & PostKeyToOperation[Index].KeyBit) == PostKeyToOperation[Index].KeyBit &&
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ScanCode == PostKeyToOperation[Index].ScanCode){
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*PostOperation = (UINTN)PostKeyToOperation[Index].PostOperation;
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if (PostKeyToOperation[Index].PostOperation == NO_OPERATION) {
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break;
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}
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return EFI_MEDIA_CHANGED;
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} else if (KeyDetected == 0xffff && ScanCode == PostKeyToOperation[Index].ScanCode) {
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//
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// Pure EFI enviorment, no monitor key driver
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//
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*PostOperation = (UINTN)PostKeyToOperation[Index].PostOperation;
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if (PostKeyToOperation[Index].PostOperation == NO_OPERATION) {
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break;
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}
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return EFI_MEDIA_CHANGED;
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}
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}
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return EFI_SUCCESS;
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}
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