+++ /dev/null
-/*
- * PROJECT: ReactOS HAL
- * LICENSE: GPL - See COPYING in the top level directory
- * FILE: hal/halx86/generic/cmos.c
- * PURPOSE: CMOS Access Routines (Real Time Clock and LastKnownGood)
- * PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
- * Eric Kohl
- */
-
-/* INCLUDES ******************************************************************/
-
-#include <hal.h>
-#define NDEBUG
-#include <debug.h>
-
-#if defined(ALLOC_PRAGMA) && !defined(_MINIHAL_)
-#pragma alloc_text(INIT, HalpInitializeCmos)
-#endif
-
-/* GLOBALS *******************************************************************/
-
-UCHAR HalpCmosCenturyOffset;
-
-/* PRIVATE FUNCTIONS *********************************************************/
-
-UCHAR
-NTAPI
-HalpReadCmos(IN UCHAR Reg)
-{
- /* Select the register */
- WRITE_PORT_UCHAR(CMOS_CONTROL_PORT, Reg);
-
- /* Query the value */
- return READ_PORT_UCHAR(CMOS_DATA_PORT);
-}
-
-VOID
-NTAPI
-HalpWriteCmos(IN UCHAR Reg,
- IN UCHAR Value)
-{
- /* Select the register */
- WRITE_PORT_UCHAR(CMOS_CONTROL_PORT, Reg);
-
- /* Write the value */
- WRITE_PORT_UCHAR(CMOS_DATA_PORT, Value);
-}
-
-ULONG
-NTAPI
-HalpGetCmosData(IN ULONG BusNumber,
- IN ULONG SlotNumber,
- IN PVOID Buffer,
- IN ULONG Length)
-{
- PUCHAR Ptr = (PUCHAR)Buffer;
- ULONG Address = SlotNumber;
- ULONG Len = Length;
-
- /* Do nothing if we don't have a length */
- if (!Length) return 0;
-
- /* Acquire CMOS Lock */
- HalpAcquireCmosSpinLock();
-
- /* Check if this is simple CMOS */
- if (BusNumber == 0)
- {
- /* Loop the buffer up to 0xFF */
- while ((Len > 0) && (Address < 0x100))
- {
- /* Read the data */
- *Ptr = HalpReadCmos((UCHAR)Address);
-
- /* Update position and length */
- Ptr++;
- Address++;
- Len--;
- }
- }
- else if (BusNumber == 1)
- {
- /* Loop the buffer up to 0xFFFF */
- while ((Len > 0) && (Address < 0x10000))
- {
- /* Write the data */
- *Ptr = HalpReadCmos((UCHAR)Address);
-
- /* Update position and length */
- Ptr++;
- Address++;
- Len--;
- }
- }
-
- /* Release CMOS Lock */
- HalpReleaseCmosSpinLock();
-
- /* Return length read */
- return Length - Len;
-}
-
-ULONG
-NTAPI
-HalpSetCmosData(IN ULONG BusNumber,
- IN ULONG SlotNumber,
- IN PVOID Buffer,
- IN ULONG Length)
-{
- PUCHAR Ptr = (PUCHAR)Buffer;
- ULONG Address = SlotNumber;
- ULONG Len = Length;
-
- /* Do nothing if we don't have a length */
- if (!Length) return 0;
-
- /* Acquire CMOS Lock */
- HalpAcquireCmosSpinLock();
-
- /* Check if this is simple CMOS */
- if (BusNumber == 0)
- {
- /* Loop the buffer up to 0xFF */
- while ((Len > 0) && (Address < 0x100))
- {
- /* Write the data */
- HalpWriteCmos((UCHAR)Address, *Ptr);
-
- /* Update position and length */
- Ptr++;
- Address++;
- Len--;
- }
- }
- else if (BusNumber == 1)
- {
- /* Loop the buffer up to 0xFFFF */
- while ((Len > 0) && (Address < 0x10000))
- {
- /* Write the data */
- HalpWriteCmos((UCHAR)Address, *Ptr);
-
- /* Update position and length */
- Ptr++;
- Address++;
- Len--;
- }
- }
-
- /* Release CMOS Lock */
- HalpReleaseCmosSpinLock();
-
- /* Return length read */
- return Length - Len;
-}
-
-INIT_SECTION
-VOID
-NTAPI
-HalpInitializeCmos(VOID)
-{
- /* Set default century offset byte */
- HalpCmosCenturyOffset = 50;
-
- /* No support for EISA or MCA */
- ASSERT(HalpBusType == MACHINE_TYPE_ISA);
-}
-
-/* PUBLIC FUNCTIONS **********************************************************/
-
-/*
- * @implemented
- */
-ARC_STATUS
-NTAPI
-HalGetEnvironmentVariable(IN PCH Name,
- IN USHORT ValueLength,
- IN PCH Value)
-{
- UCHAR Val;
-
- /* Only variable supported on x86 */
- if (_stricmp(Name, "LastKnownGood")) return ENOENT;
-
- /* Acquire CMOS Lock */
- HalpAcquireCmosSpinLock();
-
- /* Query the current value */
- Val = HalpReadCmos(RTC_REGISTER_B) & 0x01;
-
- /* Release CMOS lock */
- HalpReleaseCmosSpinLock();
-
- /* Check the flag */
- if (Val)
- {
- /* Return false */
- strncpy(Value, "FALSE", ValueLength);
- }
- else
- {
- /* Return true */
- strncpy(Value, "TRUE", ValueLength);
- }
-
- /* Return success */
- return ESUCCESS;
-}
-
-/*
- * @implemented
- */
-ARC_STATUS
-NTAPI
-HalSetEnvironmentVariable(IN PCH Name,
- IN PCH Value)
-{
- UCHAR Val;
-
- /* Only variable supported on x86 */
- if (_stricmp(Name, "LastKnownGood")) return ENOMEM;
-
- /* Check if this is true or false */
- if (!_stricmp(Value, "TRUE"))
- {
- /* It's true, acquire CMOS lock */
- HalpAcquireCmosSpinLock();
-
- /* Read the current value and add the flag */
- Val = HalpReadCmos(RTC_REGISTER_B) | 1;
- }
- else if (!_stricmp(Value, "FALSE"))
- {
- /* It's false, acquire CMOS lock */
- HalpAcquireCmosSpinLock();
-
- /* Read the current value and mask out the flag */
- Val = HalpReadCmos(RTC_REGISTER_B) & ~1;
- }
- else
- {
- /* Fail */
- return ENOMEM;
- }
-
- /* Write new value */
- HalpWriteCmos(RTC_REGISTER_B, Val);
-
- /* Release the lock and return success */
- HalpReleaseCmosSpinLock();
- return ESUCCESS;
-}
-
-/*
- * @implemented
- */
-BOOLEAN
-NTAPI
-HalQueryRealTimeClock(OUT PTIME_FIELDS Time)
-{
- /* Acquire CMOS Lock */
- HalpAcquireCmosSpinLock();
-
- /* Loop while update is in progress */
- while ((HalpReadCmos(RTC_REGISTER_A)) & RTC_REG_A_UIP);
-
- /* Set the time data */
- Time->Second = BCD_INT(HalpReadCmos(0));
- Time->Minute = BCD_INT(HalpReadCmos(2));
- Time->Hour = BCD_INT(HalpReadCmos(4));
- Time->Weekday = BCD_INT(HalpReadCmos(6));
- Time->Day = BCD_INT(HalpReadCmos(7));
- Time->Month = BCD_INT(HalpReadCmos(8));
- Time->Year = BCD_INT(HalpReadCmos(9));
- Time->Milliseconds = 0;
-
- /* FIXME: Check century byte */
-
- /* Compensate for the century field */
- Time->Year += (Time->Year > 80) ? 1900: 2000;
-
- /* Release CMOS lock */
- HalpReleaseCmosSpinLock();
-
- /* Always return TRUE */
- return TRUE;
-}
-
-/*
- * @implemented
- */
-BOOLEAN
-NTAPI
-HalSetRealTimeClock(IN PTIME_FIELDS Time)
-{
- /* Acquire CMOS Lock */
- HalpAcquireCmosSpinLock();
-
- /* Loop while update is in progress */
- while ((HalpReadCmos(RTC_REGISTER_A)) & RTC_REG_A_UIP);
-
- /* Write time fields to CMOS RTC */
- HalpWriteCmos(0, INT_BCD(Time->Second));
- HalpWriteCmos(2, INT_BCD(Time->Minute));
- HalpWriteCmos(4, INT_BCD(Time->Hour));
- HalpWriteCmos(6, INT_BCD(Time->Weekday));
- HalpWriteCmos(7, INT_BCD(Time->Day));
- HalpWriteCmos(8, INT_BCD(Time->Month));
- HalpWriteCmos(9, INT_BCD(Time->Year % 100));
-
- /* FIXME: Set the century byte */
-
- /* Release CMOS lock */
- HalpReleaseCmosSpinLock();
-
- /* Always return TRUE */
- return TRUE;
-}
projects / reactos.git / blobdiff