mirror of
https://github.com/reactos/reactos.git
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112 lines
2.3 KiB
C
112 lines
2.3 KiB
C
/*
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* COPYRIGHT: See COPYING.ARM in the top level directory
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* PROJECT: ReactOS UEFI Boot Library
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* FILE: boot/environ/lib/io/blkcache.c
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* PURPOSE: Boot Library Block Cache Management Routines
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* PROGRAMMER: Alex Ionescu (alex.ionescu@reactos.org)
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*/
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/* INCLUDES ******************************************************************/
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#include "bl.h"
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/* DATA VARIABLES ************************************************************/
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ULONG BcpBlockAllocatorHandle;
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ULONG BcpHashTableId;
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/* FUNCTIONS *****************************************************************/
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NTSTATUS
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BcpDestroy (
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VOID
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)
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{
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//BcpPurgeCacheEntries();
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//return BlpMmDeleteBlockAllocator(BcpBlockAllocatorHandle);
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EfiPrintf(L"Destructor for block cache not yet implemented\r\n");
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return STATUS_NOT_IMPLEMENTED;
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}
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BOOLEAN
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BcpCompareKey (
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_In_ PBL_HASH_ENTRY Entry1,
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_In_ PBL_HASH_ENTRY Entry2
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)
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{
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PULONG Value1, Value2;
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Value1 = Entry1->Value;
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Value2 = Entry2->Value;
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return Entry1->Size == Entry2->Size && Entry1->Flags == Entry2->Flags && *Value1 == *Value2 && Value1[1] == Value2[1] && Value1[2] == Value2[2];
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}
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ULONG
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BcpHashFunction (
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_In_ PBL_HASH_ENTRY Entry,
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_In_ ULONG TableSize
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)
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{
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ULONG i, j, ValueHash;
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PUCHAR ValueBuffer;
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j = 0;
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ValueHash = 0;
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i = 0;
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ValueBuffer = Entry->Value;
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do
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{
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ValueHash += ValueBuffer[i++];
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} while (i < 8);
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do
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{
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ValueHash += ValueBuffer[j++ + 8];
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} while (j < 4);
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return ValueHash % TableSize;
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}
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NTSTATUS
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BcInitialize (
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VOID
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)
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{
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NTSTATUS Status;
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Status = BlHtCreate(50, BcpHashFunction, BcpCompareKey, &BcpHashTableId);
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if (!NT_SUCCESS(Status))
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{
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goto Quickie;
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}
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BcpBlockAllocatorHandle = BlpMmCreateBlockAllocator();
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if (BcpBlockAllocatorHandle == -1)
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{
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Status = STATUS_UNSUCCESSFUL;
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goto Quickie;
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}
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Status = BlpIoRegisterDestroyRoutine(BcpDestroy);
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if (Status >= 0)
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{
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return Status;
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}
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Quickie:
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EfiPrintf(L"Failure path not yet implemented\r\n");
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#if 0
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if (BcpHashTableId != -1)
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{
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BlHtDestroy(BcpHashTableId);
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}
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if (BcpBlockAllocatorHandle != -1)
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{
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BlpMmDeleteBlockAllocator(BcpBlockAllocatorHandle);
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}
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#endif
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return Status;
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}
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