runtimelib.c

来自「EFI BIOS是Intel提出的下一代的BIOS标准。这里上传的Edk源代码是」· C语言 代码 · 共 1,318 行 · 第 1/3 页

  SAL_RETURN_REGS ReturnReg;

  ReturnReg = EfiCallEsalService (&Guid, IsVirtual, 0, 0, 0, 0, 0, 0, 0);

  return (BOOLEAN) (ReturnReg.r9 == 1);
}

BOOLEAN
EfiAtRuntime (
  VOID
  )
/*++

Routine Description:
  Return TRUE if ExitBootService () has been called

Arguments:
  NONE

Returns: 
  TRUE - If ExitBootService () has been called

--*/
{
  EFI_GUID Guid = EFI_EXTENDED_SAL_VIRTUAL_SERVICES_PROTOCOL_GUID;
  SAL_RETURN_REGS ReturnReg;

  ReturnReg = EfiCallEsalService (&Guid, IsEfiRuntime, 0, 0, 0, 0, 0, 0, 0);

  return (BOOLEAN) (ReturnReg.r9 == 1);
}

EFI_STATUS
EfiReportStatusCode (
  IN EFI_STATUS_CODE_TYPE     CodeType,
  IN EFI_STATUS_CODE_VALUE    Value,
  IN UINT32                   Instance,
  IN EFI_GUID                 * CallerId,
  IN EFI_STATUS_CODE_DATA     * Data OPTIONAL
  )
/*++

Routine Description:

  Status Code reporter

Arguments:

  CodeType    - Type of Status Code.
  
  Value       - Value to output for Status Code.
  
  Instance    - Instance Number of this status code.
  
  CallerId    - ID of the caller of this status code.
  
  Data        - Optional data associated with this status code.

Returns:

  Status code

--*/
{
  EFI_GUID Guid = EFI_EXTENDED_SAL_STATUS_CODE_SERVICES_PROTOCOL_GUID;
  SAL_RETURN_REGS ReturnReg;


  ReturnReg = EfiCallEsalService (
                &Guid,
                StatusCode,
                (UINT64) CodeType,
                (UINT64) Value,
                (UINT64) Instance,
                (UINT64) CallerId,
                (UINT64) Data,
                0,
                0
                );

  return (EFI_STATUS) ReturnReg.Status;
}
//
//  Sal Reset Driver Class
//
VOID
EfiResetSystem (
  IN EFI_RESET_TYPE     ResetType,
  IN EFI_STATUS         ResetStatus,
  IN UINTN              DataSize,
  IN CHAR16             *ResetData
  )
/*++

Routine Description:

  Resets the entire platform.

Arguments:

  ResetType   - The type of reset to perform.
  ResetStatus - The status code for the reset.
  DataSize    - The size, in bytes, of ResetData.
  ResetData   - A data buffer that includes a Null-terminated Unicode string, optionally
                followed by additional binary data.

Returns:

  None

--*/
{
  EFI_GUID Guid = EFI_EXTENDED_SAL_RESET_SERVICES_PROTOCOL_GUID;

  EfiCallEsalService (
    &Guid,
    ResetSystem,
    (UINT64) ResetType,
    (UINT64) ResetStatus,
    (UINT64) DataSize,
    (UINT64) ResetData,
    0,
    0,
    0
    );
}
//
//  Sal MTC Driver Class
//
EFI_STATUS
EfiGetNextHighMonotonicCount (
  OUT UINT32      *HighCount
  )
/*++

Routine Description:

  Returns the next high 32 bits of the platform’s monotonic counter.

Arguments:

  HighCount - Pointer to returned value.

Returns:

  Status code

--*/
{
  SAL_RETURN_REGS ReturnReg;

  EFI_GUID Guid = EFI_EXTENDED_SAL_MTC_SERVICES_PROTOCOL_GUID;

  ReturnReg = EfiCallEsalService (&Guid, GetNextHighMonotonicCount, (UINT64) HighCount, 0, 0, 0, 0, 0, 0);
  return (EFI_STATUS) ReturnReg.Status;
}
//
// Sal Variable Driver Class
//
EFI_STATUS
EfiGetVariable (
  IN CHAR16                       *VariableName,
  IN EFI_GUID                     * VendorGuid,
  OUT UINT32                      *Attributes OPTIONAL,
  IN OUT UINTN                    *DataSize,
  OUT VOID                        *Data
  )
/*++

Routine Description:

  Returns the value of a variable.

Arguments:

  VariableName  - A Null-terminated Unicode string that is the name of the
                  vendor’s variable.
  VendorGuid    - A unique identifier for the vendor.
  Attributes    - If not NULL, a pointer to the memory location to return the
                  attributes bitmask for the variable.
  DataSize      - On input, the size in bytes of the return Data buffer.
                  On output the size of data returned in Data.
  Data          - The buffer to return the contents of the variable.

Returns:

  Status code

--*/
{
  SAL_RETURN_REGS ReturnReg;
  EFI_GUID Guid = EFI_EXTENDED_SAL_VARIABLE_SERVICES_PROTOCOL_GUID;

  ReturnReg = EfiCallEsalService (
                &Guid,
                EsalGetVariable,
                (UINT64) VariableName,
                (UINT64) VendorGuid,
                (UINT64) Attributes,
                (UINT64) DataSize,
                (UINT64) Data,
                0,
                0
                );
  return (EFI_STATUS) ReturnReg.Status;
}

EFI_STATUS
EfiGetNextVariableName (
  IN OUT UINTN                    *VariableNameSize,
  IN OUT CHAR16                   *VariableName,
  IN OUT EFI_GUID                 *VendorGuid
  )
/*++

Routine Description:

  Enumerates the current variable names.

Arguments:

  VariableNameSize  - The size of the VariableName buffer.
  VariableName      - On input, supplies the last VariableName that was returned
                      by GetNextVariableName(). 
                      On output, returns the Nullterminated Unicode string of the
                      current variable.
  VendorGuid        - On input, supplies the last VendorGuid that was returned by
                      GetNextVariableName(). 
                      On output, returns the VendorGuid of the current variable.

Returns:

  Status code

--*/
{
  SAL_RETURN_REGS ReturnReg;
  EFI_GUID Guid = EFI_EXTENDED_SAL_VARIABLE_SERVICES_PROTOCOL_GUID;

  ReturnReg = EfiCallEsalService (
                &Guid,
                EsalGetNextVariableName,
                (UINT64) VariableNameSize,
                (UINT64) VariableName,
                (UINT64) VendorGuid,
                0,
                0,
                0,
                0
                );
  return (EFI_STATUS) ReturnReg.Status;
}

EFI_STATUS
EfiSetVariable (
  IN CHAR16                       *VariableName,
  IN EFI_GUID                     *VendorGuid,
  IN UINT32                       Attributes,
  IN UINTN                        DataSize,
  IN VOID                         *Data
  )
/*++

Routine Description:

  Sets the value of a variable.

Arguments:

  VariableName  - A Null-terminated Unicode string that is the name of the
                  vendor’s variable.
  VendorGuid    - A unique identifier for the vendor.
  Attributes    - Attributes bitmask to set for the variable.
  DataSize      - The size in bytes of the Data buffer.
  Data          - The contents for the variable.

Returns:

  Status code

--*/
{
  SAL_RETURN_REGS ReturnReg;
  EFI_GUID Guid = EFI_EXTENDED_SAL_VARIABLE_SERVICES_PROTOCOL_GUID;

  ReturnReg = EfiCallEsalService (
                &Guid,
                EsalSetVariable,
                (UINT64) VariableName,
                (UINT64) VendorGuid,
                (UINT64) Attributes,
                (UINT64) DataSize,
                (UINT64) Data,
                0,
                0
                );
  return (EFI_STATUS) ReturnReg.Status;
}

#if (EFI_SPECIFICATION_VERSION >= 0x00020000)

EFI_STATUS
EfiQueryVariableInfo (
  IN UINT32           Attributes,
  OUT UINT64          *MaximumVariableStorageSize,
  OUT UINT64          *RemainingVariableStorageSize,
  OUT UINT64          *MaximumVariableSize
  )
/*++

Routine Description:

  This code returns information about the EFI variables.

Arguments:

  Attributes                      Attributes bitmask to specify the type of variables 
                                  on which to return information.
  MaximumVariableStorageSize      Pointer to the maximum size of the storage space available
                                  for the EFI variables associated with the attributes specified.
  RemainingVariableStorageSize    Pointer to the remaining size of the storage space available 
                                  for the EFI variables associated with the attributes specified.
  MaximumVariableSize             Pointer to the maximum size of the individual EFI variables
                                  associated with the attributes specified.

Returns:

  Status code

--*/
{
  SAL_RETURN_REGS ReturnReg;
  EFI_GUID Guid = EFI_EXTENDED_SAL_VARIABLE_SERVICES_PROTOCOL_GUID;

  ReturnReg = EfiCallEsalService (
                &Guid,
                EsalQueryVariableInfo,
                (UINT64) Attributes,
                (UINT64) MaximumVariableStorageSize,
                (UINT64) RemainingVariableStorageSize,
                (UINT64) MaximumVariableSize,
                0, 
                0,
                0
                );
  return (EFI_STATUS) ReturnReg.Status;
}

#endif

//
//  Sal RTC Driver Class.
//
EFI_STATUS
EfiGetTime (
  OUT EFI_TIME              *Time,
  OUT EFI_TIME_CAPABILITIES *Capabilities
  )
/*++

Routine Description:

  Returns the current time and date information, and the time-keeping 
  capabilities of the hardware platform.

Arguments:

  Time          - A pointer to storage to receive a snapshot of the current time.
  Capabilities  - An optional pointer to a buffer to receive the real time clock device’s
                  capabilities.

Returns:

  Status code

--*/
{
  SAL_RETURN_REGS ReturnReg;
  EFI_GUID Guid = EFI_EXTENDED_SAL_RTC_SERVICES_PROTOCOL_GUID;

  ReturnReg = EfiCallEsalService (&Guid, GetTime, (UINT64) Time, (UINT64) Capabilities, 0, 0, 0, 0, 0);
  return ReturnReg.Status;
}

EFI_STATUS
EfiSetTime (
  OUT EFI_TIME              *Time
  )
/*++

Routine Description:

  Sets the current local time and date information.

Arguments:

  Time  - A pointer to the current time.

Returns:

  Status code

--*/
{
  SAL_RETURN_REGS ReturnReg;

  EFI_GUID Guid = EFI_EXTENDED_SAL_RTC_SERVICES_PROTOCOL_GUID;

  ReturnReg = EfiCallEsalService (&Guid, SetTime, (UINT64) Time, 0, 0, 0, 0, 0, 0);
  return ReturnReg.Status;
}

EFI_STATUS
EfiGetWakeupTime (
  OUT BOOLEAN       *Enabled,
  OUT BOOLEAN       *Pending,
  OUT EFI_TIME      *Time
  )
/*++

Routine Description:

  Returns the current wakeup alarm clock setting.

Arguments:

  Enabled - Indicates if the alarm is currently enabled or disabled.
  Pending - Indicates if the alarm signal is pending and requires acknowledgement.
  Time    - The current alarm setting.

Returns:

  Status code

--*/
{
  SAL_RETURN_REGS ReturnReg;

  EFI_GUID Guid = EFI_EXTENDED_SAL_RTC_SERVICES_PROTOCOL_GUID;