mirror of https://github.com/acidanthera/audk.git
353 lines
8.1 KiB
C
353 lines
8.1 KiB
C
/*++
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Copyright (c) 2004 - 2008, Intel Corporation
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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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Module Name:
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RealTimeClock.c
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Abstract:
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UNIX Emulation Architectural Protocol Driver as defined in Tiano
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--*/
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#include "PiDxe.h"
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#include "UnixDxe.h"
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#include <Protocol/RealTimeClock.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiLib.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/UnixLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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BOOLEAN
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DayValid (
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IN EFI_TIME *Time
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);
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BOOLEAN
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IsLeapYear (
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IN EFI_TIME *Time
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);
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EFI_STATUS
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RtcTimeFieldsValid (
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IN EFI_TIME *Time
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);
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EFI_STATUS
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EFIAPI
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InitializeRealTimeClock (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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);
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EFI_STATUS
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EFIAPI
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UnixGetTime (
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OUT EFI_TIME * Time,
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OUT EFI_TIME_CAPABILITIES * Capabilities OPTIONAL
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)
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/*++
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Routine Description:
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Service routine for RealTimeClockInstance->GetTime
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Arguments:
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Time - A pointer to storage that will receive a snapshot of the current time.
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Capabilities - A pointer to storage that will receive the capabilities of the real time clock
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in the platform. This includes the real time clock's resolution and accuracy.
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All reported device capabilities are rounded up. This is an OPTIONAL argument.
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Returns:
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EFI_SUCEESS - The underlying GetSystemTime call occurred and returned
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Note that in the NT32 emulation, the GetSystemTime call has no return value
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thus you will always receive a EFI_SUCCESS on this.
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--*/
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// TODO: EFI_INVALID_PARAMETER - add return value to function comment
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{
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//
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// Check parameter for null pointer
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//
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if (Time == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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gUnix->GetLocalTime (Time);
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if (Capabilities != NULL) {
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Capabilities->Resolution = 1;
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Capabilities->Accuracy = 50000000;
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Capabilities->SetsToZero = FALSE;
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}
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return EFI_SUCCESS;
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}
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EFI_STATUS
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EFIAPI
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UnixSetTime (
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IN EFI_TIME *Time
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)
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/*++
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Routine Description:
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Service routine for RealTimeClockInstance->SetTime
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Arguments:
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Time - A pointer to storage containing the time and date information to
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program into the real time clock.
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Returns:
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EFI_SUCEESS - The operation completed successfully.
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EFI_INVALID_PARAMETER - One of the fields in Time is out of range.
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EFI_DEVICE_ERROR - The operation could not be complete due to a device error.
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--*/
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// TODO: EFI_SUCCESS - add return value to function comment
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{
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EFI_STATUS Status;
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if (Time == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Make sure that the time fields are valid
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//
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Status = RtcTimeFieldsValid (Time);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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return EFI_UNSUPPORTED;
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}
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EFI_STATUS
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EFIAPI
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UnixGetWakeupTime (
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OUT BOOLEAN *Enabled,
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OUT BOOLEAN *Pending,
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OUT EFI_TIME *Time
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)
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/*++
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Routine Description:
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Service routine for RealTimeClockInstance->GetWakeupTime
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Arguments:
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This - Indicates the protocol instance structure.
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Enabled - Indicates if the alarm is currently enabled or disabled.
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Pending - Indicates if the alarm signal is pending and requires
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acknowledgement.
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Time - The current alarm setting.
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Returns:
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EFI_SUCEESS - The operation completed successfully.
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EFI_DEVICE_ERROR - The operation could not be complete due to a device error.
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EFI_UNSUPPORTED - The operation is not supported on this platform.
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--*/
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{
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return EFI_UNSUPPORTED;
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}
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EFI_STATUS
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EFIAPI
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UnixSetWakeupTime (
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IN BOOLEAN Enable,
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OUT EFI_TIME *Time
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)
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/*++
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Routine Description:
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Service routine for RealTimeClockInstance->SetWakeupTime
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Arguments:
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Enabled - Enable or disable the wakeup alarm.
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Time - If enable is TRUE, the time to set the wakup alarm for.
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If enable is FALSE, then this parameter is optional, and
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may be NULL.
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Returns:
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EFI_SUCEESS - The operation completed successfully.
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EFI_DEVICE_ERROR - The operation could not be complete due to a device error.
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EFI_INVALID_PARAMETER - A field in Time is out of range.
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EFI_UNSUPPORTED - The operation is not supported on this platform.
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--*/
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{
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return EFI_UNSUPPORTED;
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}
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EFI_STATUS
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EFIAPI
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InitializeRealTimeClock (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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/*++
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Routine Description:
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Install Real Time Clock Protocol
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Arguments:
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ImageHandle - Image Handle
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SystemTable - Pointer to system table
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Returns:
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EFI_SUCEESS - Real Time Clock Services are installed into the Runtime Services Table
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--*/
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{
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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SystemTable->RuntimeServices->GetTime = UnixGetTime;
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SystemTable->RuntimeServices->SetTime = UnixSetTime;
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SystemTable->RuntimeServices->GetWakeupTime = UnixGetWakeupTime;
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SystemTable->RuntimeServices->SetWakeupTime = UnixSetWakeupTime;
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Handle = NULL;
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Status = gBS->InstallMultipleProtocolInterfaces (
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&Handle,
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&gEfiRealTimeClockArchProtocolGuid,
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NULL,
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NULL
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);
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return Status;
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}
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EFI_STATUS
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RtcTimeFieldsValid (
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IN EFI_TIME *Time
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)
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/*++
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Routine Description:
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Arguments:
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Returns:
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--*/
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// TODO: Time - add argument and description to function comment
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// TODO: EFI_INVALID_PARAMETER - add return value to function comment
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// TODO: EFI_SUCCESS - add return value to function comment
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{
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if (Time->Year < 1998 ||
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Time->Year > 2099 ||
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Time->Month < 1 ||
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Time->Month > 12 ||
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(!DayValid (Time)) ||
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Time->Hour > 23 ||
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Time->Minute > 59 ||
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Time->Second > 59 ||
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Time->Nanosecond > 999999999 ||
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(!(Time->TimeZone == EFI_UNSPECIFIED_TIMEZONE || (Time->TimeZone >= -1440 && Time->TimeZone <= 1440))) ||
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(Time->Daylight & (~(EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT)))
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) {
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return EFI_INVALID_PARAMETER;
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}
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return EFI_SUCCESS;
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}
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BOOLEAN
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DayValid (
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IN EFI_TIME *Time
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)
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/*++
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Routine Description:
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TODO: Add function description
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Arguments:
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Time - TODO: add argument description
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Returns:
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TODO: add return values
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--*/
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{
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STATIC const INTN DayOfMonth[12] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
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if (Time->Day < 1 ||
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Time->Day > DayOfMonth[Time->Month - 1] ||
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(Time->Month == 2 && (!IsLeapYear (Time) && Time->Day > 28))
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) {
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return FALSE;
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}
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return TRUE;
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}
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BOOLEAN
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IsLeapYear (
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IN EFI_TIME *Time
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)
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/*++
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Routine Description:
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TODO: Add function description
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Arguments:
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Time - TODO: add argument description
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Returns:
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TODO: add return values
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--*/
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{
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if (Time->Year % 4 == 0) {
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if (Time->Year % 100 == 0) {
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if (Time->Year % 400 == 0) {
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return TRUE;
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} else {
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return FALSE;
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}
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} else {
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return TRUE;
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}
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} else {
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return FALSE;
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}
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}
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