ReactOS  0.4.15-dev-3302-ga37d9a4
cmos.c File Reference
#include <hal.h>
#include <debug.h>
Include dependency graph for cmos.c:

Go to the source code of this file.

Macros

#define NDEBUG
 
#define NVRAM_START   0x3FE2
 
#define NVRAM_SIZE   0x1C
 
#define NVRAM_UNUSED_REG   0x14
 
#define NVRAM_UNUSED_BIT   0x80
 

Functions

static UCHAR BCD_INT (_In_ UCHAR Bcd)
 
static UCHAR NTAPI HalpReadNvram (_In_ UCHAR Register)
 
 _Requires_lock_held_ (HalpSystemHardwareLock)
 
UCHAR NTAPI HalpReadCmos (_In_ UCHAR Reg)
 
VOID NTAPI HalpWriteCmos (_In_ UCHAR Reg, _In_ UCHAR Value)
 
ULONG NTAPI HalpGetCmosData (_In_ ULONG BusNumber, _In_ ULONG SlotNumber, _Out_writes_bytes_(Length) PVOID Buffer, _In_ ULONG Length)
 
ULONG NTAPI HalpSetCmosData (_In_ ULONG BusNumber, _In_ ULONG SlotNumber, _In_reads_bytes_(Length) PVOID Buffer, _In_ ULONG Length)
 
VOID NTAPI HalpInitializeCmos (VOID)
 
ARC_STATUS NTAPI HalGetEnvironmentVariable (_In_ PCH Name, _In_ USHORT ValueLength, _Out_writes_z_(ValueLength) PCH Value)
 
ARC_STATUS NTAPI HalSetEnvironmentVariable (_In_ PCH Name, _In_ PCH Value)
 
BOOLEAN NTAPI HalQueryRealTimeClock (_Out_ PTIME_FIELDS Time)
 
BOOLEAN NTAPI HalSetRealTimeClock (_In_ PTIME_FIELDS Time)
 

Variables

static ULONG_PTR MappedNvram
 

Macro Definition Documentation

◆ NDEBUG

#define NDEBUG

Definition at line 12 of file cmos.c.

◆ NVRAM_SIZE

#define NVRAM_SIZE   0x1C

Definition at line 28 of file cmos.c.

◆ NVRAM_START

#define NVRAM_START   0x3FE2

Definition at line 27 of file cmos.c.

◆ NVRAM_UNUSED_BIT

#define NVRAM_UNUSED_BIT   0x80

Definition at line 30 of file cmos.c.

◆ NVRAM_UNUSED_REG

#define NVRAM_UNUSED_REG   0x14

Definition at line 29 of file cmos.c.

Function Documentation

◆ _Requires_lock_held_()

_Requires_lock_held_ ( HalpSystemHardwareLock  )

Definition at line 53 of file cmos.c.

59 {
63 }
#define GDC1_IO_o_MODE_FLIPFLOP1
Definition: video.h:238
unsigned char * PUCHAR
Definition: retypes.h:3
PPC_QUAL void __outbyte(unsigned long const Port, const unsigned char Data)
Definition: intrin_ppc.h:605
#define GDC1_NVRAM_PROTECT
Definition: video.h:251
#define GDC1_NVRAM_UNPROTECT
Definition: video.h:252
_Must_inspect_result_ _In_ WDFKEY _In_ PCUNICODE_STRING _Out_opt_ PUSHORT _Inout_opt_ PUNICODE_STRING Value
Definition: wdfregistry.h:406
static ULONG_PTR MappedNvram
Definition: cmos.c:32
NTKERNELAPI VOID NTAPI WRITE_REGISTER_UCHAR(IN PUCHAR Register, IN UCHAR Value)

◆ BCD_INT()

static UCHAR BCD_INT ( _In_ UCHAR  Bcd)
static

Definition at line 39 of file cmos.c.

41 {
42  return ((Bcd & 0xF0) >> 4) * 10 + (Bcd & 0x0F);
43 }

Referenced by HalQueryRealTimeClock().

◆ HalGetEnvironmentVariable()

ARC_STATUS NTAPI HalGetEnvironmentVariable ( _In_ PCH  Name,
_In_ USHORT  ValueLength,
_Out_writes_z_(ValueLength) PCH  Value 
)

Definition at line 183 of file cmos.c.

187 {
188  UCHAR Val;
189 
190  /* Only variable supported on x86 */
191  if (_stricmp(Name, "LastKnownGood"))
192  return ENOENT;
193 
194  if (!MappedNvram)
195  return ENOENT;
196 
198 
200 
202 
203  /* Check the flag */
204  if (Val)
205  strncpy(Value, "FALSE", ValueLength);
206  else
207  strncpy(Value, "TRUE", ValueLength);
208 
209  return ESUCCESS;
210 }
Definition: arc.h:32
char * strncpy(char *DstString, const char *SrcString, ACPI_SIZE Count)
Definition: utclib.c:427
#define _stricmp
Definition: cat.c:22
VOID NTAPI HalpReleaseCmosSpinLock(VOID)
Definition: spinlock.c:229
static UCHAR NTAPI HalpReadNvram(_In_ UCHAR Register)
Definition: cmos.c:47
_Must_inspect_result_ _In_ WDFKEY _In_ PCUNICODE_STRING _Out_opt_ PUSHORT _Inout_opt_ PUNICODE_STRING Value
Definition: wdfregistry.h:406
static ULONG_PTR MappedNvram
Definition: cmos.c:32
VOID NTAPI HalpAcquireCmosSpinLock(VOID)
Definition: spinlock.c:212
#define NVRAM_UNUSED_REG
Definition: cmos.c:29
unsigned char UCHAR
Definition: xmlstorage.h:181
Definition: arc.h:46
#define NVRAM_UNUSED_BIT
Definition: cmos.c:30
_Must_inspect_result_ _In_ WDFKEY _In_ PCUNICODE_STRING _In_ ULONG ValueLength
Definition: wdfregistry.h:271

◆ HalpGetCmosData()

ULONG NTAPI HalpGetCmosData ( _In_ ULONG  BusNumber,
_In_ ULONG  SlotNumber,
_Out_writes_bytes_(Length) PVOID  Buffer,
_In_ ULONG  Length 
)

Definition at line 142 of file cmos.c.

147 {
148  /* Not supported by hardware */
149  return 0;
150 }

◆ HalpInitializeCmos()

VOID NTAPI HalpInitializeCmos ( VOID  )

Definition at line 167 of file cmos.c.

168 {
170 
171  /* TODO: Detect TVRAM address */
172  if (TRUE)
174  else
177 }
#define TRUE
Definition: types.h:120
PVOID NTAPI HalpMapPhysicalMemory64(IN PHYSICAL_ADDRESS PhysicalAddress, IN PFN_COUNT PageCount)
Definition: memory.c:140
#define VRAM_HI_RESO_TEXT
Definition: video.h:32
#define NVRAM_START
Definition: cmos.c:27
static ULONG_PTR MappedNvram
Definition: cmos.c:32
#define BYTES_TO_PAGES(Size)
_Must_inspect_result_ typedef _In_ PHYSICAL_ADDRESS PhysicalAddress
Definition: iotypes.h:1098
#define VRAM_NORMAL_TEXT
Definition: video.h:17
#define ULONG_PTR
Definition: config.h:101
#define NVRAM_SIZE
Definition: cmos.c:28
LONGLONG QuadPart
Definition: typedefs.h:114

◆ HalpReadCmos()

◆ HalpReadNvram()

static UCHAR NTAPI HalpReadNvram ( _In_ UCHAR  Register)
static

Definition at line 47 of file cmos.c.

49 {
50  return READ_REGISTER_UCHAR((PUCHAR)(MappedNvram + Register));
51 }
unsigned char * PUCHAR
Definition: retypes.h:3
static ULONG_PTR MappedNvram
Definition: cmos.c:32
NTKERNELAPI UCHAR NTAPI READ_REGISTER_UCHAR(IN PUCHAR Register)

Referenced by HalGetEnvironmentVariable(), and HalSetEnvironmentVariable().

◆ HalpSetCmosData()

ULONG NTAPI HalpSetCmosData ( _In_ ULONG  BusNumber,
_In_ ULONG  SlotNumber,
_In_reads_bytes_(Length) PVOID  Buffer,
_In_ ULONG  Length 
)

Definition at line 154 of file cmos.c.

159 {
160  /* Not supported by hardware */
161  return 0;
162 }

◆ HalpWriteCmos()

VOID NTAPI HalpWriteCmos ( _In_ UCHAR  Reg,
_In_ UCHAR  Value 
)

Definition at line 132 of file cmos.c.

135 {
136  /* Not supported by hardware */
137  NOTHING;
138 }
#define NOTHING
Definition: env_spec_w32.h:461

Referenced by HalpInitializeClock(), HalpInitializeTsc(), HalpSetCmosData(), HalSetEnvironmentVariable(), HalSetRealTimeClock(), HalStartProfileInterrupt(), HalStopProfileInterrupt(), and RtcSetClockRate().

◆ HalQueryRealTimeClock()

BOOLEAN NTAPI HalQueryRealTimeClock ( _Out_ PTIME_FIELDS  Time)

Definition at line 255 of file cmos.c.

257 {
258  UCHAR Temp;
259 
261 
262  HalpRtcWriteCommand(RTC_CMD_TIME_READ);
263  HalpRtcWriteCommand(RTC_CMD_REGISTER_SHIFT);
265 
266  /* Set the time data */
267  Time->Second = BCD_INT(HalpRtcReadByte());
268  Time->Minute = BCD_INT(HalpRtcReadByte());
269  Time->Hour = BCD_INT(HalpRtcReadByte());
270  Time->Day = BCD_INT(HalpRtcReadByte());
271  Temp = HalpRtcReadByte();
272  Time->Weekday = Temp & 0x0F;
273  Time->Month = Temp >> 4;
274  Time->Year = BCD_INT(HalpRtcReadByte());
275  Time->Milliseconds = 0;
276 
277  Time->Year += (Time->Year >= 80) ? 1900 : 2000;
278 
279  HalpRtcWriteCommand(RTC_CMD_REGISTER_HOLD);
280 
282 
283  return TRUE;
284 }
#define TRUE
Definition: types.h:120
static UCHAR BCD_INT(_In_ UCHAR Bcd)
Definition: cmos.c:39
VOID NTAPI HalpReleaseCmosSpinLock(VOID)
Definition: spinlock.c:229
VOID NTAPI HalpAcquireCmosSpinLock(VOID)
Definition: spinlock.c:212
#define RTC_CMD_REGISTER_HOLD
Definition: rtc.h:16
unsigned char UCHAR
Definition: xmlstorage.h:181
#define RTC_CMD_TIME_READ
Definition: rtc.h:19
#define RTC_CMD_REGISTER_SHIFT
Definition: rtc.h:17
VOID NTAPI KeStallExecutionProcessor(IN ULONG MicroSeconds)
Definition: ntoskrnl.c:96
static PLARGE_INTEGER Time
Definition: time.c:105

◆ HalSetEnvironmentVariable()

ARC_STATUS NTAPI HalSetEnvironmentVariable ( _In_ PCH  Name,
_In_ PCH  Value 
)

Definition at line 214 of file cmos.c.

217 {
218  UCHAR Val;
219 
220  /* Only variable supported on x86 */
221  if (_stricmp(Name, "LastKnownGood"))
222  return ENOMEM;
223 
224  if (!MappedNvram)
225  return ENOMEM;
226 
227  /* Check if this is true or false */
228  if (!_stricmp(Value, "TRUE"))
229  {
231 
233  }
234  else if (!_stricmp(Value, "FALSE"))
235  {
237 
239  }
240  else
241  {
242  /* Fail */
243  return ENOMEM;
244  }
245 
246  HalpWriteNvram(NVRAM_UNUSED_REG, Val);
247 
249 
250  return ESUCCESS;
251 }
Definition: arc.h:32
#define _stricmp
Definition: cat.c:22
Definition: arc.h:48
VOID NTAPI HalpReleaseCmosSpinLock(VOID)
Definition: spinlock.c:229
static UCHAR NTAPI HalpReadNvram(_In_ UCHAR Register)
Definition: cmos.c:47
_Must_inspect_result_ _In_ WDFKEY _In_ PCUNICODE_STRING _Out_opt_ PUSHORT _Inout_opt_ PUNICODE_STRING Value
Definition: wdfregistry.h:406
static ULONG_PTR MappedNvram
Definition: cmos.c:32
VOID NTAPI HalpAcquireCmosSpinLock(VOID)
Definition: spinlock.c:212
#define NVRAM_UNUSED_REG
Definition: cmos.c:29
unsigned char UCHAR
Definition: xmlstorage.h:181
#define NVRAM_UNUSED_BIT
Definition: cmos.c:30

◆ HalSetRealTimeClock()

BOOLEAN NTAPI HalSetRealTimeClock ( _In_ PTIME_FIELDS  Time)

Definition at line 288 of file cmos.c.

290 {
291  UCHAR i, j;
292  UCHAR SysTime[6];
293 
295 
296  HalpRtcWriteCommand(RTC_CMD_REGISTER_SHIFT);
297 
298  SysTime[0] = INT_BCD(Time->Second);
299  SysTime[1] = INT_BCD(Time->Minute);
300  SysTime[2] = INT_BCD(Time->Hour);
301  SysTime[3] = INT_BCD(Time->Day);
302  SysTime[4] = (Time->Month << 4) | (Time->Weekday & 0x0F);
303  SysTime[5] = INT_BCD(Time->Year % 100);
304 
305  /* Write time fields to RTC */
306  for (i = 0; i < 6; i++)
307  {
308  for (j = 0; j < 8; j++)
309  HalpRtcWriteBit(SysTime[i] >> j);
310  }
311 
312  HalpRtcWriteCommand(RTC_CMD_TIME_SET_COUNTER_HOLD);
313  HalpRtcWriteCommand(RTC_CMD_REGISTER_HOLD);
314 
316 
317  return TRUE;
318 }
#define TRUE
Definition: types.h:120
VOID NTAPI HalpReleaseCmosSpinLock(VOID)
Definition: spinlock.c:229
#define RTC_CMD_TIME_SET_COUNTER_HOLD
Definition: rtc.h:18
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint GLint GLint j
Definition: glfuncs.h:250
VOID NTAPI HalpAcquireCmosSpinLock(VOID)
Definition: spinlock.c:212
#define RTC_CMD_REGISTER_HOLD
Definition: rtc.h:16
unsigned char UCHAR
Definition: xmlstorage.h:181
#define RTC_CMD_REGISTER_SHIFT
Definition: rtc.h:17
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
#define INT_BCD(int)
Definition: halp.h:59
static PLARGE_INTEGER Time
Definition: time.c:105

Variable Documentation

◆ MappedNvram