Adding support for BeagleBoard.
ArmPkg - Supoprt for ARM specific things that can change as the architecture changes. Plus semihosting JTAG drivers. EmbeddedPkg - Generic support for an embeddded platform. Including a light weight command line shell. BeagleBoardPkg - Platform specifics for BeagleBoard. SD Card works, but USB has issues. Looks like a bug in the open source USB stack (Our internal stack works fine). git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9518 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
AJFISH
306
EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Variable.c
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306
EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Variable.c
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/** @file
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Variable services implemented from system memory
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There is just a single runtime memory buffer that contans all the data.
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Copyright (c) 2007, Intel Corporation<BR>
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Portions copyright (c) 2008-2009, Apple Inc. All rights reserved.
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All rights reserved. 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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UINT64 mMaximumVariableStorageSize;
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UINT64 mRemainingVariableStorageSize;
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UINT64 mMaximumVariableSize;
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typedef struct {
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EFI_GUID VendorGuid;
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UINT32 Attribute;
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UINTN DataSize;
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} VARIABLE_ARRAY_ENTRY;
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// CHAR16 VariableName[]
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// UINT8 Data[]
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VARIABLE_ARRAY_ENTRY *mVariableArray = NULL;
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VARIABLE_ARRAY_ENTRY *mVariableArrayNextFree = NULL;
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VARIABLE_ARRAY_ENTRY *mVariableArrayEnd = NULL;
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VARIABLE_ARRAY_ENTRY *
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AddEntry (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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IN UINT32 Attributes,
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IN UINTN DataSize,
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IN VOID *Data
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)
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{
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UINTN Size;
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UINTN SizeOfString;
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VARIABLE_ARRAY_ENTRY *Entry;
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EFI_TPL CurrentTpl;
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SizeOfString = StrSize (VariableName);
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Size = SizeOfString + sizeof (VARIABLE_ARRAY_ENTRY) + DataSize;
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if ((VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArrayNextFree) + Size) > mVariableArrayEnd) {
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// ran out of space
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return NULL;
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}
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if (!EfiAtRuntime ()) {
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// Enter critical section
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CurrentTpl = gBS->RaiseTPL (EFI_TPL_HIGH_LEVEL);
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}
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Entry = mVariableArrayNextFree;
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CopyGuid (&Entry->VendorGuid, VendorGuid);
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Entry->Attribute = Attributes;
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Entry->DataSize = DataSize;
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StrCpy ((CHAR16 *)++mVariableArrayNextFree, VariableName);
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mVariableArrayNextFree = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArrayNextFree) + SizeOfString);
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CopyMem (mVariableArrayNextFree, Data, DataSize);
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mVariableArrayNextFree = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArrayNextFree) + DataSize);
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if (!EfiAtRuntime ()) {
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// Exit Critical section
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gBS->RestoreTPL (CurrentTpl);
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}
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return Entry;
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}
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VOID
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DeleteEntry (
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IN VARIABLE_ARRAY_ENTRY *Entry
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)
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{
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UINTN Size;
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UINT8 *Data;
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EFI_TPL CurrentTpl;
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Size = StrSize ((CHAR16 *)(Entry + 1)) + sizeof (VARIABLE_ARRAY_ENTRY) + Entry->DataSize;
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Data = ((UINT8 *)Entry) + Size;
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CopyMem (Entry, Data, (UINTN)mVariableArrayNextFree - (UINTN)Data);
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if (!EfiAtRuntime ()) {
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// Enter critical section
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CurrentTpl = gBS->RaiseTPL (EFI_TPL_HIGH_LEVEL);
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}
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mVariableArrayNextFree = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArrayNextFree) - Size);
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if (!EfiAtRuntime ()) {
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// Exit Critical section
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gBS->RestoreTPL (CurrentTpl);
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}
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}
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VARIABLE_ARRAY_ENTRY *
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GetVariableArrayEntry (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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OUT VOID **Data OPTIONAL
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)
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{
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VARIABLE_ARRAY_ENTRY *Entry;
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UINTN Size;
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if (*VariableName == L'\0') {
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// by definition first entry is null-terminated string
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if (mVariableArray == mVariableArrayNextFree) {
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return NULL;
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}
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return mVariableArray;
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}
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for (Entry = mVariableArray; Entry < mVariableArrayEnd;) {
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if (CompareGuid (VendorGuid, &Entry->VendorGuid)) {
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if (StrCmp (VariableName, (CHAR16 *)(Entry + 1))) {
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Size = StrSize ((CHAR16 *)(Entry + 1));
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if (Data != NULL) {
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*Data = (VOID *)(((UINT8 *)Entry) + (Size + sizeof (VARIABLE_ARRAY_ENTRY)));
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}
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return Entry;
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}
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}
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Size = StrSize ((CHAR16 *)(Entry + 1)) + sizeof (VARIABLE_ARRAY_ENTRY) + Entry->DataSize;
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Entry = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)Entry) + Size);
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}
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return NULL;
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}
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EFI_STATUS
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LibGetVariable (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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OUT UINT32 *Attributes OPTIONAL,
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IN OUT UINTN *DataSize,
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OUT VOID *Data
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)
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{
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VARIABLE_ARRAY_ENTRY *Entry;
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VOID *InternalData;
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if (EfiAtRuntime () && (Attributes != NULL)) {
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if ((*Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0) {
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return EFI_NOT_FOUND;
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}
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}
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Entry = GetVariableArrayEntry (VariableName, VendorGuid, &InternalData);
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if (Entry == NULL) {
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return EFI_NOT_FOUND;
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}
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if (*DataSize < Entry->DataSize) {
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*DataSize = Entry->DataSize;
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return EFI_BUFFER_TOO_SMALL;
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}
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*DataSize = Entry->DataSize;
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if (Attributes != NULL) {
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*Attributes = Entry->Attribute;
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}
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CopyMem (Data, InternalData, *DataSize);
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return EFI_SUCCESS;
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}
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EFI_STATUS
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LibGetNextVariableName (
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IN OUT UINTN *VariableNameSize,
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IN OUT CHAR16 *VariableName,
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IN OUT EFI_GUID *VendorGuid
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)
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{
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VARIABLE_ARRAY_ENTRY *Entry;
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VOID *InternalData;
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UINTN StringSize;
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BOOLEAN Done;
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for (Done = FALSE; !Done; ) {
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Entry = GetVariableArrayEntry (VariableName, VendorGuid, &InternalData);
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if (Entry == NULL) {
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return EFI_NOT_FOUND;
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}
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// If we are at runtime skip variables that do not have the Runitme attribute set.
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Done = (EfiAtRuntime () && ((Entry->Attribute & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) ? FALSE : TRUE;
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}
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StringSize = StrSize ((CHAR16 *)(Entry + 1));
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Entry = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)Entry) + (StringSize + sizeof (VARIABLE_ARRAY_ENTRY) + Entry->DataSize));
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if (Entry >= mVariableArrayEnd) {
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return EFI_NOT_FOUND;
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}
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if (*VariableNameSize < StringSize) {
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*VariableNameSize = StringSize;
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return EFI_BUFFER_TOO_SMALL;
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}
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*VariableNameSize = StringSize;
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CopyMem (VariableName, (CHAR16 *)(Entry + 1), StringSize);
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CopyMem (VendorGuid, &Entry->VendorGuid, sizeof (EFI_GUID));
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return EFI_SUCCESS;
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}
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EFI_STATUS
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LibSetVariable (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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IN UINT32 Attributes,
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IN UINTN DataSize,
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IN VOID *Data
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)
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{
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VARIABLE_ARRAY_ENTRY *Entry;
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VOID *InternalData;
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if (EfiAtRuntime () && ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) {
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return EFI_NOT_FOUND;
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}
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Entry = GetVariableArrayEntry (VariableName, VendorGuid, &InternalData);
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if (Entry == NULL) {
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if (DataSize == 0) {
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return EFI_NOT_FOUND;
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}
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Entry = AddEntry (VariableName, VendorGuid, Attributes, DataSize, Data);
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return (Entry == NULL) ? EFI_OUT_OF_RESOURCES : EFI_SUCCESS;
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} else if (DataSize == 0) {
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// DataSize is zero so delete
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DeleteEntry (Entry);
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} else if (DataSize == Entry->DataSize) {
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// No change is size so just update the store
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Entry->Attribute |= Attributes;
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CopyMem (InternalData, Data, DataSize);
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} else {
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// Grow the entry by deleting and adding back. Don't lose previous Attributes
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Attributes |= Entry->Attribute;
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DeleteEntry (Entry);
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Entry = AddEntry (VariableName, VendorGuid, Attributes, DataSize, Data);
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return (Entry == NULL) ? EFI_OUT_OF_RESOURCES : EFI_SUCCESS;
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}
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}
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EFI_STATUS
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LibQueryVariableInfo (
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IN UINT32 Attributes,
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OUT UINT64 *MaximumVariableStorageSize,
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OUT UINT64 *RemainingVariableStorageSize,
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OUT UINT64 *MaximumVariableSize
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)
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{
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*MaximumVariableStorageSize = mMaximumVariableStorageSize;
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*RemainingVariableStorageSize = mRemainingVariableStorageSize;
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*MaximumVariableStorageSize = mRemainingVariableStorageSize;
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return EFI_SUCCESS;
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}
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VOID
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LibVariableVirtualAddressChangeEvent (VOID)
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{
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EfiConvertPointer (0, (VOID **)&mVariableArray);
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EfiConvertPointer (0, (VOID **)&mVariableArrayNextFree);
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EfiConvertPointer (0, (VOID **)&mVariableArrayEnd);
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}
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VOID
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LibVariableInitialize (VOID)
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{
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UINTN Size;
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Size = PcdGet32 (PcdEmbeddedMemVariableStoreSize);
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mVariableArray = mVariableArrayNextFree = (VARIABLE_ARRAY_ENTRY *)AllocateRuntimePool (Size);
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ASSERT (mVariableArray != NULL);
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mVariableArrayEnd = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArray) + Size);
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mMaximumVariableStorageSize = Size - sizeof (VARIABLE_ARRAY_ENTRY);
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mRemainingVariableStorageSize = mMaximumVariableStorageSize;
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mMaximumVariableSize = mMaximumVariableStorageSize;
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}
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