Intel Extensible Firmware Interface - Manual (Page 719)

Protocols — Debugger Support
Version 1.10 12/01/02 16-5
EFI_DEBUG_SUPPORT_PROTOCOL.GetMaximumProcessorIndex()
Summary
Returns the maximum value that may be used for the ProcessorIndex parameter in
RegisterPeriodicCallback() and RegisterExceptionCallback() .
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_GET_MAXIMUM_PROCESSOR_INDEX) (
IN EFI_DEBUG_SUPPORT_PROTOCOL
*This,
OUT UINTN *MaxProcessorIndex
);
Parameters
This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
Type EFI_DEBUG_SUPPORT_PROTOCOL is defined in
Section 16.2.
MaxProcessorIndex Pointer to a caller-allocated UINTN in which the maximum
supported processor index is returned.
Description
The GetMaximumProcessorIndex() function returns the maximum processor index in the
output parameter MaxProcessorIndex . This value is the largest value that may be used in the
ProcessorIndex parameter for both RegisterPeriodicCallback() and
RegisterExceptionCallback() . All values between 0 and MaxProcessorIndex must
be supported by RegisterPeriodicCallback() and
RegisterExceptionCallback() .
It is the responsibility of the caller to insure all parameters are correct. There is no provision for
parameter checking by
GetMaximumProcessorIndex() . The implementation behavior
when an invalid parameter is passed is not defined by this specification.
Status Codes Returned
EFI_SUCCESS The function completed successfully.