mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-26 16:47:40 +01:00
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
/** @file
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Key code ring
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Copyright (c) 2018, vit9696. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "AIKData.h"
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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VOID
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AIKDataReset (
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IN OUT AIK_DATA *Data
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)
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{
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Data->KeyBufferHead = Data->KeyBufferTail = Data->KeyBuffer;
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Data->KeyBufferSize = 0;
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}
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BOOLEAN
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AIKDataEmpty (
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IN AIK_DATA *Data
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)
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{
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return Data->KeyBufferSize == 0;
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}
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EFI_STATUS
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AIKDataReadEntry (
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IN OUT AIK_DATA *Data,
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OUT AMI_EFI_KEY_DATA *KeyData
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)
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{
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if (Data->KeyBufferSize == 0) {
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return EFI_NOT_READY;
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}
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CopyMem(KeyData, Data->KeyBufferTail, sizeof (*KeyData));
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Data->KeyBufferSize--;
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Data->KeyBufferTail++;
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if (Data->KeyBufferTail == &Data->KeyBuffer[AIK_DATA_BUFFER_SIZE]) {
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Data->KeyBufferTail = Data->KeyBuffer;
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}
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return EFI_SUCCESS;
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}
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VOID
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AIKDataWriteEntry (
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IN OUT AIK_DATA *Data,
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IN AMI_EFI_KEY_DATA *KeyData
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)
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{
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//
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// Eat the first entry if we have no room
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//
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if (Data->KeyBufferSize == AIK_DATA_BUFFER_SIZE) {
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Data->KeyBufferSize--;
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Data->KeyBufferTail++;
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if (Data->KeyBufferTail == &Data->KeyBuffer[AIK_DATA_BUFFER_SIZE]) {
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Data->KeyBufferTail = Data->KeyBuffer;
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}
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}
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Data->KeyBufferSize++;
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CopyMem(Data->KeyBufferHead, KeyData, sizeof (*KeyData));
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Data->KeyBufferHead++;
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if (Data->KeyBufferHead == &Data->KeyBuffer[AIK_DATA_BUFFER_SIZE]) {
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Data->KeyBufferHead = Data->KeyBuffer;
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}
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}
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