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MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6426 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jji4
2008-11-07 07:44:21 +00:00
parent c5ed97f628
commit 8d85dc3126
4 changed files with 417 additions and 589 deletions
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470
MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcRtc.c
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@@ -14,88 +14,87 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include "PcRtc.h"
/**
Compare the Hour, Minute and Second of the From time and the To time.
Only compare H/M/S in EFI_TIME and ignore other fields here.
@param From the first time
@param To the second time
@return >0 The H/M/S of the From time is later than those of To time
@return ==0 The H/M/S of the From time is same as those of To time
@return <0 The H/M/S of the From time is earlier than those of To time
**/
INTN
CompareHMS (
IN EFI_TIME *From,
IN EFI_TIME *To
);
/**
To check if second date is later than first date within 24 hours.
@param From the first date
@param To the second date
@retval TRUE From is previous to To within 24 hours.
@retval FALSE From is later, or it is previous to To more than 24 hours.
**/
BOOLEAN
IsWithinOneDay (
IN EFI_TIME *From,
IN EFI_TIME *To
);
/**
Read RTC content through its registers.
@param Address Address offset of RTC. It is recommended to use macros such as
RTC_ADDRESS_SECONDS.
@return The data of UINT8 type read from RTC.
**/
UINT8
RtcRead (
IN UINT8 Address
)
/*++
Routine Description:
GC_TODO: Add function description
Arguments:
Address - GC_TODO: add argument description
Returns:
GC_TODO: add return values
--*/
{
IoWrite8 (PCAT_RTC_ADDRESS_REGISTER, (UINT8) (Address | (UINT8) (IoRead8 (PCAT_RTC_ADDRESS_REGISTER) & 0x80)));
return IoRead8 (PCAT_RTC_DATA_REGISTER);
}
/**
Write RTC through its registers.
@param Address Address offset of RTC. It is recommended to use macros such as
RTC_ADDRESS_SECONDS.
@param Data The content you want to write into RTC.
**/
VOID
RtcWrite (
IN UINT8 Address,
IN UINT8 Data
)
/*++
Routine Description:
GC_TODO: Add function description
Arguments:
Address - GC_TODO: add argument description
Data - GC_TODO: add argument description
Returns:
GC_TODO: add return values
--*/
{
IoWrite8 (PCAT_RTC_ADDRESS_REGISTER, (UINT8) (Address | (UINT8) (IoRead8 (PCAT_RTC_ADDRESS_REGISTER) & 0x80)));
IoWrite8 (PCAT_RTC_DATA_REGISTER, Data);
}
/**
Initialize RTC.
@param Global For global use inside this module.
@retval EFI_DEVICE_ERROR Initialization failed due to device error.
@retval EFI_SUCCESS Initialization successful.
**/
EFI_STATUS
PcRtcInit (
IN PC_RTC_MODULE_GLOBALS *Global
)
/*++
Routine Description:
GC_TODO: Add function description
Arguments:
Global - GC_TODO: add argument description
Returns:
EFI_DEVICE_ERROR - GC_TODO: Add description for return value
EFI_SUCCESS - GC_TODO: Add description for return value
--*/
{
EFI_STATUS Status;
RTC_REGISTER_A RegisterA;
@@ -112,7 +111,7 @@ Returns:
//BugBug: the EfiAtRuntime should be encapsulated in EfiAcquireLock or
// provide a new instance for EfiAcquireLock, say, RtEfiAcquireLock
if (!EfiAtRuntime ()) {
EfiAcquireLock (&Global->RtcLock);
EfiAcquireLock (&Global->RtcLock);
}
//
// Initialize RTC Register
@@ -147,7 +146,7 @@ Returns:
//BugBug: the EfiAtRuntime should be encapsulated in EfiAcquireLock or
// provide a new instance for EfiAcquireLock, say, RtEfiAcquireLock
if (!EfiAtRuntime ()) {
EfiReleaseLock (&Global->RtcLock);
EfiReleaseLock (&Global->RtcLock);
}
return EFI_DEVICE_ERROR;
}
@@ -180,7 +179,7 @@ Returns:
// provide a new instance for EfiAcquireLock, say, RtEfiAcquireLock
//
if (!EfiAtRuntime ()) {
EfiReleaseLock (&Global->RtcLock);
EfiReleaseLock (&Global->RtcLock);
}
//
@@ -225,26 +224,26 @@ Returns:
return EFI_SUCCESS;
}
/**
Returns the current time and date information, and the time-keeping capabilities
of the hardware platform.
@param Time A pointer to storage to receive a snapshot of the current time.
@param Capabilities An optional pointer to a buffer to receive the real time clock
device's capabilities.
@param Global For global use inside this module.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER Time is NULL.
@retval EFI_DEVICE_ERROR The time could not be retrieved due to hardware error.
**/
EFI_STATUS
PcRtcGetTime (
OUT EFI_TIME *Time,
IN EFI_TIME_CAPABILITIES *Capabilities,
IN PC_RTC_MODULE_GLOBALS *Global
OUT EFI_TIME *Time,
OUT EFI_TIME_CAPABILITIES *Capabilities, OPTIONAL
IN PC_RTC_MODULE_GLOBALS *Global
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// GC_TODO: Time - add argument and description to function comment
// GC_TODO: Capabilities - add argument and description to function comment
// GC_TODO: Global - add argument and description to function comment
// GC_TODO: EFI_INVALID_PARAMETER - add return value to function comment
// GC_TODO: EFI_DEVICE_ERROR - add return value to function comment
// GC_TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
RTC_REGISTER_B RegisterB;
@@ -263,7 +262,7 @@ Routine Description:
//BugBug: the EfiAtRuntime should be encapsulated in EfiAcquireLock or
// provide a new instance for EfiAcquireLock, say, RtEfiAcquireLock
if (!EfiAtRuntime ()) {
EfiAcquireLock (&Global->RtcLock);
EfiAcquireLock (&Global->RtcLock);
}
//
// Wait for up to 0.1 seconds for the RTC to be updated
@@ -273,7 +272,7 @@ Routine Description:
//BugBug: the EfiAtRuntime should be encapsulated in EfiReleaseLock or
// provide a new instance for EfiReleaseLock, say, RtEfiReleaseLock
if (!EfiAtRuntime ()) {
EfiReleaseLock (&Global->RtcLock);
EfiReleaseLock (&Global->RtcLock);
}
return Status;
}
@@ -304,7 +303,7 @@ Routine Description:
//BugBug: the EfiAtRuntime should be encapsulated in EfiReleaseLock or
// provide a new instance for EfiReleaseLock, say, RtEfiReleaseLock
if (!EfiAtRuntime ()) {
EfiReleaseLock (&Global->RtcLock);
EfiReleaseLock (&Global->RtcLock);
}
//
// Get the variable that containts the TimeZone and Daylight fields
@@ -325,7 +324,7 @@ Routine Description:
//
// Fill in Capabilities if it was passed in
//
if (Capabilities) {
if (Capabilities != NULL) {
Capabilities->Resolution = 1;
//
// 1 hertz
@@ -340,22 +339,22 @@ Routine Description:
return EFI_SUCCESS;
}
/**
Sets the current local time and date information.
@param Time A pointer to the current time.
@param Global For global use inside this module.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER A time field is out of range.
@retval EFI_DEVICE_ERROR The time could not be set due due to hardware error.
**/
EFI_STATUS
PcRtcSetTime (
IN EFI_TIME *Time,
IN PC_RTC_MODULE_GLOBALS *Global
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// GC_TODO: Time - add argument and description to function comment
// GC_TODO: Global - add argument and description to function comment
// GC_TODO: EFI_INVALID_PARAMETER - add return value to function comment
{
EFI_STATUS Status;
EFI_TIME RtcTime;
@@ -382,7 +381,7 @@ Routine Description:
//BugBug: the EfiAtRuntime should be encapsulated in EfiAcquireLock or
// provide a new instance for EfiAcquireLock, say, RtEfiAcquireLock
if (!EfiAtRuntime ()) {
EfiAcquireLock (&Global->RtcLock);
EfiAcquireLock (&Global->RtcLock);
}
//
// Wait for up to 0.1 seconds for the RTC to be updated
@@ -429,7 +428,7 @@ Routine Description:
//BugBug: the EfiAtRuntime should be encapsulated in EfiReleaseLock or
// provide a new instance for EfiReleaseLock, say, RtEfiReleaseLock
if (!EfiAtRuntime ()) {
EfiReleaseLock (&Global->RtcLock);
EfiReleaseLock (&Global->RtcLock);
}
//
// Set the variable that containts the TimeZone and Daylight fields
@@ -451,31 +450,29 @@ Routine Description:
return EFI_SUCCESS;
}
/**
Returns the current wakeup alarm clock setting.
@param Enabled Indicates if the alarm is currently enabled or disabled.
@param Pending Indicates if the alarm signal is pending and requires acknowledgement.
@param Time The current alarm setting.
@param Global For global use inside this module.
@retval EFI_SUCCESS The alarm settings were returned.
@retval EFI_INVALID_PARAMETER Enabled is NULL.
@retval EFI_INVALID_PARAMETER Pending is NULL.
@retval EFI_INVALID_PARAMETER Time is NULL.
@retval EFI_DEVICE_ERROR The wakeup time could not be retrieved due to a hardware error.
@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.
**/
EFI_STATUS
PcRtcGetWakeupTime (
OUT BOOLEAN *Enabled,
OUT BOOLEAN *Pending,
OUT EFI_TIME *Time,
IN PC_RTC_MODULE_GLOBALS *Global
IN PC_RTC_MODULE_GLOBALS *Global
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// GC_TODO: Enabled - add argument and description to function comment
// GC_TODO: Pending - add argument and description to function comment
// GC_TODO: Time - add argument and description to function comment
// GC_TODO: Global - add argument and description to function comment
// GC_TODO: EFI_INVALID_PARAMETER - add return value to function comment
// GC_TODO: EFI_DEVICE_ERROR - add return value to function comment
// GC_TODO: EFI_DEVICE_ERROR - add return value to function comment
// GC_TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
RTC_REGISTER_B RegisterB;
@@ -495,7 +492,7 @@ Returns:
//BugBug: the EfiAtRuntime should be encapsulated in EfiAcquireLock or
// provide a new instance for EfiAcquireLock, say, RtEfiAcquireLock
if (!EfiAtRuntime ()) {
EfiAcquireLock (&Global->RtcLock);
EfiAcquireLock (&Global->RtcLock);
}
//
// Wait for up to 0.1 seconds for the RTC to be updated
@@ -547,7 +544,7 @@ Returns:
//BugBug: the EfiAtRuntime should be encapsulated in EfiReleaseLock or
// provide a new instance for EfiReleaseLock, say, RtEfiReleaseLock
if (!EfiAtRuntime ()) {
EfiReleaseLock (&Global->RtcLock);
EfiReleaseLock (&Global->RtcLock);
}
//
// Make sure all field values are in correct range
@@ -565,30 +562,27 @@ Returns:
return EFI_SUCCESS;
}
/**
Sets the system wakeup alarm clock time.
@param Enabled Enable or disable the wakeup alarm.
@param Time If Enable is TRUE, the time to set the wakeup alarm for.
If Enable is FALSE, then this parameter is optional, and may be NULL.
@param Global For global use inside this module.
@retval EFI_SUCCESS If Enable is TRUE, then the wakeup alarm was enabled.
If Enable is FALSE, then the wakeup alarm was disabled.
@retval EFI_INVALID_PARAMETER A time field is out of range.
@retval EFI_DEVICE_ERROR The wakeup time could not be set due to a hardware error.
@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.
**/
EFI_STATUS
PcRtcSetWakeupTime (
IN BOOLEAN Enable,
OUT EFI_TIME *Time,
IN EFI_TIME *Time, OPTIONAL
IN PC_RTC_MODULE_GLOBALS *Global
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// GC_TODO: Enable - add argument and description to function comment
// GC_TODO: Time - add argument and description to function comment
// GC_TODO: Global - add argument and description to function comment
// GC_TODO: EFI_INVALID_PARAMETER - add return value to function comment
// GC_TODO: EFI_INVALID_PARAMETER - add return value to function comment
// GC_TODO: EFI_UNSUPPORTED - add return value to function comment
// GC_TODO: EFI_DEVICE_ERROR - add return value to function comment
// GC_TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
EFI_TIME RtcTime;
@@ -627,7 +621,7 @@ Returns:
//BugBug: the EfiAtRuntime should be encapsulated in EfiAcquireLock or
// provide a new instance for EfiAcquireLock, say, RtEfiAcquireLock
if (!EfiAtRuntime ()) {
EfiAcquireLock (&Global->RtcLock);
EfiAcquireLock (&Global->RtcLock);
}
//
// Wait for up to 0.1 seconds for the RTC to be updated
@@ -676,35 +670,26 @@ Returns:
//BugBug: the EfiAtRuntime should be encapsulated in EfiReleaseLock or
// provide a new instance for EfiReleaseLock, say, RtEfiReleaseLock
if (!EfiAtRuntime ()) {
EfiReleaseLock (&Global->RtcLock);
EfiReleaseLock (&Global->RtcLock);
}
return EFI_SUCCESS;
}
/**
See if centry register of RTC is valid.
@retval EFI_SUCCESS Century register is valid.
@retval EFI_DEVICE_ERROR Century register is NOT valid.
**/
EFI_STATUS
RtcTestCenturyRegister (
VOID
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// GC_TODO: EFI_SUCCESS - add return value to function comment
// GC_TODO: EFI_DEVICE_ERROR - add return value to function comment
{
UINT8 Century;
UINT8 Temp;
Century = RtcRead (RTC_ADDRESS_CENTURY);
//
// RtcWrite (RTC_ADDRESS_CENTURY, 0x00);
//
Temp = (UINT8) (RtcRead (RTC_ADDRESS_CENTURY) & 0x7f);
RtcWrite (RTC_ADDRESS_CENTURY, Century);
if (Temp == 0x19 || Temp == 0x20) {
@@ -721,10 +706,9 @@ Returns:
If valid, the function converts it to an 8-bit value and returns it.
Otherwise, return 0xff.
@param Value The 8-bit BCD value to check and convert
@param Value The 8-bit BCD value to check and convert
@return The 8-bit value converted.
0xff if Value is invalid.
@return The 8-bit value converted. Or 0xff if Value is invalid.
**/
UINT8
@@ -753,6 +737,9 @@ CheckAndConvertBcd8ToDecimal8 (
@param RegisterB Value of Register B of RTC, indicating data mode
and hour format.
@retval EFI_INVALID_PARAMETER Parameters passed in are invalid.
@retval EFI_SUCCESS Convert RTC time to EFI time successfully.
**/
EFI_STATUS
ConvertRtcTimeToEfiTime (
@@ -761,12 +748,12 @@ ConvertRtcTimeToEfiTime (
IN RTC_REGISTER_B RegisterB
)
{
BOOLEAN PM;
BOOLEAN IsPM;
if ((Time->Hour) & 0x80) {
PM = TRUE;
IsPM = TRUE;
} else {
PM = FALSE;
IsPM = FALSE;
}
Time->Hour = (UINT8) (Time->Hour & 0x7f);
@@ -793,11 +780,11 @@ ConvertRtcTimeToEfiTime (
// If time is in 12 hour format, convert it to 24 hour format
//
if (RegisterB.Bits.MIL == 0) {
if (PM && Time->Hour < 12) {
if (IsPM && Time->Hour < 12) {
Time->Hour = (UINT8) (Time->Hour + 12);
}
if (!PM && Time->Hour == 12) {
if (!IsPM && Time->Hour == 12) {
Time->Hour = 0;
}
}
@@ -809,23 +796,18 @@ ConvertRtcTimeToEfiTime (
return EFI_SUCCESS;
}
/**
Wait for a period for the RTC to be ready.
@param Timeout Tell how long it should take to wait.
@retval EFI_DEVICE_ERROR RTC device error.
@retval EFI_SUCCESS RTC is updated and ready.
**/
EFI_STATUS
RtcWaitToUpdate (
UINTN Timeout
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// GC_TODO: Timeout - add argument and description to function comment
// GC_TODO: EFI_DEVICE_ERROR - add return value to function comment
// GC_TODO: EFI_DEVICE_ERROR - add return value to function comment
// GC_TODO: EFI_SUCCESS - add return value to function comment
{
RTC_REGISTER_A RegisterA;
RTC_REGISTER_D RegisterD;
@@ -857,21 +839,19 @@ Returns:
return EFI_SUCCESS;
}
/**
See if all fields of a variable of EFI_TIME type is correct.
@param Time The time to be checked.
@retval EFI_INVALID_PARAMETER Some fields of Time are not correct.
@retval EFI_SUCCESS Time is a valid EFI_TIME variable.
**/
EFI_STATUS
RtcTimeFieldsValid (
IN EFI_TIME *Time
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// GC_TODO: Time - add argument and description to function comment
// GC_TODO: EFI_INVALID_PARAMETER - add return value to function comment
// GC_TODO: EFI_SUCCESS - add return value to function comment
{
if (Time->Year < 1998 ||
Time->Year > 2099 ||
@@ -891,25 +871,18 @@ Routine Description:
return EFI_SUCCESS;
}
/**
See if field Day of an EFI_TIME is correct.
@param Time Its Day field is to be checked.
@retval TRUE Day field of Time is correct.
@retval FALSE Day field of Time is NOT correct.
**/
BOOLEAN
DayValid (
IN EFI_TIME *Time
)
/*++
Routine Description:
GC_TODO: Add function description
Arguments:
Time - GC_TODO: add argument description
Returns:
GC_TODO: add return values
--*/
{
INTN DayOfMonth[12];
@@ -936,25 +909,18 @@ Returns:
return TRUE;
}
/**
Check if it is a leapyear.
@param Time The time to be checked.
@retval TRUE It is a leapyear.
@retval FALSE It is NOT a leapyear.
**/
BOOLEAN
IsLeapYear (
IN EFI_TIME *Time
)
/*++
Routine Description:
GC_TODO: Add function description
Arguments:
Time - GC_TODO: add argument description
Returns:
GC_TODO: add return values
--*/
{
if (Time->Year % 4 == 0) {
if (Time->Year % 100 == 0) {
@@ -971,34 +937,35 @@ Returns:
}
}
/**
Converts time from EFI_TIME format defined by UEFI spec to RTC's.
This function converts time from EFI_TIME format defined by UEFI spec to RTC's.
If data mode of RTC is BCD, then converts EFI_TIME to it.
If RTC is in 12-hour format, then converts EFI_TIME to it.
@param Time On input, the time data read from UEFI to convert
On output, the time converted to RTC format
@param RegisterB Value of Register B of RTC, indicating data mode
@param Century It is set according to EFI_TIME Time.
**/
VOID
ConvertEfiTimeToRtcTime (
IN EFI_TIME *Time,
IN RTC_REGISTER_B RegisterB,
IN UINT8 *Century
IN OUT EFI_TIME *Time,
IN RTC_REGISTER_B RegisterB,
OUT UINT8 *Century
)
/*++
Routine Description:
Arguments:
Returns:
--*/
// GC_TODO: Time - add argument and description to function comment
// GC_TODO: RegisterB - add argument and description to function comment
// GC_TODO: Century - add argument and description to function comment
{
BOOLEAN PM;
BOOLEAN IsPM;
PM = TRUE;
IsPM = TRUE;
//
// Adjust hour field if RTC in in 12 hour mode
// Adjust hour field if RTC is in 12 hour mode
//
if (RegisterB.Bits.MIL == 0) {
if (Time->Hour < 12) {
PM = FALSE;
IsPM = FALSE;
}
if (Time->Hour >= 13) {
@@ -1025,35 +992,28 @@ Returns:
//
// If we are in 12 hour mode and PM is set, then set bit 7 of the Hour field.
//
if (RegisterB.Bits.MIL == 0 && PM) {
if (RegisterB.Bits.MIL == 0 && IsPM) {
Time->Hour = (UINT8) (Time->Hour | 0x80);
}
}
/**
Compare the Hour, Minute and Second of the From time and the To time.
Only compare H/M/S in EFI_TIME and ignore other fields here.
@param From the first time
@param To the second time
@return >0 The H/M/S of the From time is later than those of To time
@return ==0 The H/M/S of the From time is same as those of To time
@return <0 The H/M/S of the From time is earlier than those of To time
**/
INTN
CompareHMS (
IN EFI_TIME *From,
IN EFI_TIME *To
)
/*++
Routine Description:
Compare the Hour, Minute and Second of the 'From' time and the 'To' time.
Only compare H/M/S in EFI_TIME and ignore other fields here.
Arguments:
From - the first time
To - the second time
Returns:
>0 : The H/M/S of the 'From' time is later than those of 'To' time
==0 : The H/M/S of the 'From' time is same as those of 'To' time
<0 : The H/M/S of the 'From' time is earlier than those of 'To' time
--*/
{
if ((From->Hour > To->Hour) ||
((From->Hour == To->Hour) && (From->Minute > To->Minute)) ||
@@ -1066,28 +1026,20 @@ Returns:
}
}
/**
To check if second date is later than first date within 24 hours.
@param From the first date
@param To the second date
@retval TRUE From is previous to To within 24 hours.
@retval FALSE From is later, or it is previous to To more than 24 hours.
**/
BOOLEAN
IsWithinOneDay (
IN EFI_TIME *From,
IN EFI_TIME *To
)
/*++
Routine Description:
Judge whether two days are adjacent.
Arguments:
From - the first day
To - the second day
Returns:
TRUE - The interval of two days are within one day.
FALSE - The interval of two days exceed ony day or parameter error.
--*/
{
UINT8 DayOfMonth[12];
BOOLEAN Adjacent;