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EFI System Table
Version 1.10 12/01/02 4-11
4.5 EFI Runtime Services Table
The EFI Runtime Services Table contains a table header and pointers to all of the runtime services.
The definition for this table is shown in the following code fragments. Except for the table header,
all elements in the EFI Runtime Services Tables are prototypes of function pointers to functions as
defined in Chapters 6. Unlike the EFI Boot Services Table, this table, and the function pointers it
contains are valid after the operating system has taken control of the platform with a call to
ExitBootServices()
. If a call to SetVirtualAddressMap() is made by the OS, then
the function pointers in this table are fixed up to point to the new virtually mapped entry points.
EFI_RUNTIME_SERVICES
Summary
Contains a table header and pointers to all of the runtime services.
Related Definitions
#define EFI_RUNTIME_SERVICES_SIGNATURE 0x56524553544e5552
#define EFI_RUNTIME_SERVICES_REVISION ((1<<16) | (10))
typedef struct {
EFI_TABLE_HEADER Hdr;
//
// Time Services
//
EFI_GET_TIME GetTime;
EFI_SET_TIME SetTime;
EFI_GET_WAKEUP_TIME GetWakeupTime;
EFI_SET_WAKEUP_TIME SetWakeupTime;
//
// Virtual Memory Services
//
EFI_SET_VIRTUAL_ADDRESS_MAP SetVirtualAddressMap;
EFI_CONVERT_POINTER ConvertPointer;
//
// Variable Services
//
EFI_GET_VARIABLE GetVariable;
EFI_GET_NEXT_VARIABLE_NAME GetNextVariableName;
EFI_SET_VARIABLE SetVariable;