diff options
Diffstat (limited to 'EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Variable.c')
| -rw-r--r-- | EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Variable.c | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Variable.c b/EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Variable.c deleted file mode 100644 index 0c1b76a4bb..0000000000 --- a/EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Variable.c +++ /dev/null @@ -1,306 +0,0 @@ -/** @file
- Variable services implemented from system memory
-
- There is just a single runtime memory buffer that contans all the data.
-
- Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
- Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
-
- This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-
-**/
-
-
-UINT64 mMaximumVariableStorageSize;
-UINT64 mRemainingVariableStorageSize;
-UINT64 mMaximumVariableSize;
-
-typedef struct {
- EFI_GUID VendorGuid;
- UINT32 Attribute;
- UINTN DataSize;
-} VARIABLE_ARRAY_ENTRY;
-// CHAR16 VariableName[]
-// UINT8 Data[]
-
-VARIABLE_ARRAY_ENTRY *mVariableArray = NULL;
-VARIABLE_ARRAY_ENTRY *mVariableArrayNextFree = NULL;
-VARIABLE_ARRAY_ENTRY *mVariableArrayEnd = NULL;
-
-
-VARIABLE_ARRAY_ENTRY *
-AddEntry (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- IN UINT32 Attributes,
- IN UINTN DataSize,
- IN VOID *Data
- )
-{
- UINTN Size;
- UINTN SizeOfString;
- VARIABLE_ARRAY_ENTRY *Entry;
- EFI_TPL CurrentTpl;
-
-
- SizeOfString = StrSize (VariableName);
- Size = SizeOfString + sizeof (VARIABLE_ARRAY_ENTRY) + DataSize;
- if ((VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArrayNextFree) + Size) > mVariableArrayEnd) {
- // ran out of space
- return NULL;
- }
-
- if (!EfiAtRuntime ()) {
- // Enter critical section
- CurrentTpl = gBS->RaiseTPL (EFI_TPL_HIGH_LEVEL);
- }
-
- Entry = mVariableArrayNextFree;
- CopyGuid (&Entry->VendorGuid, VendorGuid);
- Entry->Attribute = Attributes;
- Entry->DataSize = DataSize;
- StrCpy ((CHAR16 *)++mVariableArrayNextFree, VariableName);
- mVariableArrayNextFree = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArrayNextFree) + SizeOfString);
- CopyMem (mVariableArrayNextFree, Data, DataSize);
- mVariableArrayNextFree = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArrayNextFree) + DataSize);
-
- if (!EfiAtRuntime ()) {
- // Exit Critical section
- gBS->RestoreTPL (CurrentTpl);
- }
-
- return Entry;
-}
-
-VOID
-DeleteEntry (
- IN VARIABLE_ARRAY_ENTRY *Entry
- )
-{
- UINTN Size;
- UINT8 *Data;
- EFI_TPL CurrentTpl;
-
- Size = StrSize ((CHAR16 *)(Entry + 1)) + sizeof (VARIABLE_ARRAY_ENTRY) + Entry->DataSize;
- Data = ((UINT8 *)Entry) + Size;
-
- CopyMem (Entry, Data, (UINTN)mVariableArrayNextFree - (UINTN)Data);
-
- if (!EfiAtRuntime ()) {
- // Enter critical section
- CurrentTpl = gBS->RaiseTPL (EFI_TPL_HIGH_LEVEL);
- }
-
- mVariableArrayNextFree = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArrayNextFree) - Size);
-
- if (!EfiAtRuntime ()) {
- // Exit Critical section
- gBS->RestoreTPL (CurrentTpl);
- }
-}
-
-
-VARIABLE_ARRAY_ENTRY *
-GetVariableArrayEntry (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- OUT VOID **Data OPTIONAL
- )
-{
- VARIABLE_ARRAY_ENTRY *Entry;
- UINTN Size;
-
- if (*VariableName == L'\0') {
- // by definition first entry is null-terminated string
- if (mVariableArray == mVariableArrayNextFree) {
- return NULL;
- }
- return mVariableArray;
- }
-
- for (Entry = mVariableArray; Entry < mVariableArrayEnd;) {
- if (CompareGuid (VendorGuid, &Entry->VendorGuid)) {
- if (StrCmp (VariableName, (CHAR16 *)(Entry + 1))) {
- Size = StrSize ((CHAR16 *)(Entry + 1));
- if (Data != NULL) {
- *Data = (VOID *)(((UINT8 *)Entry) + (Size + sizeof (VARIABLE_ARRAY_ENTRY)));
- }
- return Entry;
- }
- }
-
- Size = StrSize ((CHAR16 *)(Entry + 1)) + sizeof (VARIABLE_ARRAY_ENTRY) + Entry->DataSize;
- Entry = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)Entry) + Size);
- }
-
- return NULL;
-}
-
-
-EFI_STATUS
-LibGetVariable (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- OUT UINT32 *Attributes OPTIONAL,
- IN OUT UINTN *DataSize,
- OUT VOID *Data
- )
-{
- VARIABLE_ARRAY_ENTRY *Entry;
- VOID *InternalData;
-
- if (EfiAtRuntime () && (Attributes != NULL)) {
- if ((*Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0) {
- return EFI_NOT_FOUND;
- }
- }
-
- Entry = GetVariableArrayEntry (VariableName, VendorGuid, &InternalData);
- if (Entry == NULL) {
- return EFI_NOT_FOUND;
- }
-
- if (*DataSize < Entry->DataSize) {
- *DataSize = Entry->DataSize;
- return EFI_BUFFER_TOO_SMALL;
- }
-
- *DataSize = Entry->DataSize;
- if (Attributes != NULL) {
- *Attributes = Entry->Attribute;
- }
-
- CopyMem (Data, InternalData, *DataSize);
- return EFI_SUCCESS;
-}
-
-
-EFI_STATUS
-LibGetNextVariableName (
- IN OUT UINTN *VariableNameSize,
- IN OUT CHAR16 *VariableName,
- IN OUT EFI_GUID *VendorGuid
- )
-{
- VARIABLE_ARRAY_ENTRY *Entry;
- VOID *InternalData;
- UINTN StringSize;
- BOOLEAN Done;
-
- for (Done = FALSE; !Done; ) {
- Entry = GetVariableArrayEntry (VariableName, VendorGuid, &InternalData);
- if (Entry == NULL) {
- return EFI_NOT_FOUND;
- }
-
- // If we are at runtime skip variables that do not have the Runitme attribute set.
- Done = (EfiAtRuntime () && ((Entry->Attribute & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) ? FALSE : TRUE;
- }
-
- StringSize = StrSize ((CHAR16 *)(Entry + 1));
- Entry = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)Entry) + (StringSize + sizeof (VARIABLE_ARRAY_ENTRY) + Entry->DataSize));
- if (Entry >= mVariableArrayEnd) {
- return EFI_NOT_FOUND;
- }
-
- if (*VariableNameSize < StringSize) {
- *VariableNameSize = StringSize;
- return EFI_BUFFER_TOO_SMALL;
- }
-
- *VariableNameSize = StringSize;
- CopyMem (VariableName, (CHAR16 *)(Entry + 1), StringSize);
- CopyMem (VendorGuid, &Entry->VendorGuid, sizeof (EFI_GUID));
- return EFI_SUCCESS;
-}
-
-
-
-EFI_STATUS
-LibSetVariable (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- IN UINT32 Attributes,
- IN UINTN DataSize,
- IN VOID *Data
- )
-{
- VARIABLE_ARRAY_ENTRY *Entry;
- VOID *InternalData;
-
- if (EfiAtRuntime () && ((Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) {
- return EFI_NOT_FOUND;
- }
-
- Entry = GetVariableArrayEntry (VariableName, VendorGuid, &InternalData);
- if (Entry == NULL) {
- if (DataSize == 0) {
- return EFI_NOT_FOUND;
- }
- Entry = AddEntry (VariableName, VendorGuid, Attributes, DataSize, Data);
- return (Entry == NULL) ? EFI_OUT_OF_RESOURCES : EFI_SUCCESS;
-
- } else if (DataSize == 0) {
- // DataSize is zero so delete
- DeleteEntry (Entry);
- } else if (DataSize == Entry->DataSize) {
- // No change is size so just update the store
- Entry->Attribute |= Attributes;
- CopyMem (InternalData, Data, DataSize);
- } else {
- // Grow the entry by deleting and adding back. Don't lose previous Attributes
- Attributes |= Entry->Attribute;
- DeleteEntry (Entry);
- Entry = AddEntry (VariableName, VendorGuid, Attributes, DataSize, Data);
- return (Entry == NULL) ? EFI_OUT_OF_RESOURCES : EFI_SUCCESS;
- }
-}
-
-
-EFI_STATUS
-LibQueryVariableInfo (
- IN UINT32 Attributes,
- OUT UINT64 *MaximumVariableStorageSize,
- OUT UINT64 *RemainingVariableStorageSize,
- OUT UINT64 *MaximumVariableSize
- )
-{
- *MaximumVariableStorageSize = mMaximumVariableStorageSize;
- *RemainingVariableStorageSize = mRemainingVariableStorageSize;
- *MaximumVariableStorageSize = mRemainingVariableStorageSize;
- return EFI_SUCCESS;
-}
-
-
-VOID
-LibVariableVirtualAddressChangeEvent (VOID)
-{
- EfiConvertPointer (0, (VOID **)&mVariableArray);
- EfiConvertPointer (0, (VOID **)&mVariableArrayNextFree);
- EfiConvertPointer (0, (VOID **)&mVariableArrayEnd);
-}
-
-
-VOID
-LibVariableInitialize (VOID)
-{
- UINTN Size;
-
- Size = PcdGet32 (PcdEmbeddedMemVariableStoreSize);
- mVariableArray = mVariableArrayNextFree = (VARIABLE_ARRAY_ENTRY *)AllocateRuntimePool (Size);
- ASSERT (mVariableArray != NULL);
-
- mVariableArrayEnd = (VARIABLE_ARRAY_ENTRY *)(((UINT8 *)mVariableArray) + Size);
-
- mMaximumVariableStorageSize = Size - sizeof (VARIABLE_ARRAY_ENTRY);
- mRemainingVariableStorageSize = mMaximumVariableStorageSize;
- mMaximumVariableSize = mMaximumVariableStorageSize;
-}
-
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