ReactOS  0.4.15-dev-1070-ge1a01de
hardware.h File Reference
#include "../../reactos/registry.h"
Include dependency graph for hardware.h:

Go to the source code of this file.

Macros

#define CONFIG_CMD(bus, dev_fn, where)   (0x80000000 | (((ULONG)(bus)) << 16) | (((dev_fn) & 0x1F) << 11) | (((dev_fn) & 0xE0) << 3) | ((where) & ~3))
 

Functions

VOID StallExecutionProcessor (ULONG Microseconds)
 
VOID HalpCalibrateStallExecution (VOID)
 
ULONGLONG RDTSC (VOID)
 

Macro Definition Documentation

◆ CONFIG_CMD

#define CONFIG_CMD (   bus,
  dev_fn,
  where 
)    (0x80000000 | (((ULONG)(bus)) << 16) | (((dev_fn) & 0x1F) << 11) | (((dev_fn) & 0xE0) << 3) | ((where) & ~3))

Definition at line 27 of file hardware.h.

Function Documentation

◆ HalpCalibrateStallExecution()

VOID HalpCalibrateStallExecution ( VOID  )

Definition at line 105 of file pchw.c.

106 {
107  ULONG i;
108  ULONG calib_bit;
109  ULONG CurCount;
110 
111  /* Initialise timer interrupt with MILLISECOND ms interval */
112  WRITE_PORT_UCHAR((PUCHAR)0x43, 0x34); /* binary, mode 2, LSB/MSB, ch 0 */
113  WRITE_PORT_UCHAR((PUCHAR)0x40, LATCH & 0xff); /* LSB */
114  WRITE_PORT_UCHAR((PUCHAR)0x40, LATCH >> 8); /* MSB */
115 
116  /* Stage 1: Coarse calibration */
117 
118  delay_count = 1;
119 
120  do
121  {
122  /* Next delay count to try */
123  delay_count <<= 1;
124 
126 
127  /* Do the delay */
129 
130  CurCount = Read8254Timer();
131  }
132  while (CurCount > LATCH / 2);
133 
134  /* Get bottom value for delay */
135  delay_count >>= 1;
136 
137  /* Stage 2: Fine calibration */
138 
139  /* Which bit are we going to test */
140  calib_bit = delay_count;
141 
142  for (i = 0; i < PRECISION; i++)
143  {
144  /* Next bit to calibrate */
145  calib_bit >>= 1;
146 
147  /* If we have done all bits, stop */
148  if (!calib_bit) break;
149 
150  /* Set the bit in delay_count */
151  delay_count |= calib_bit;
152 
154 
155  /* Do the delay */
157 
158  CurCount = Read8254Timer();
159  /* If a tick has passed, turn the calibrated bit back off */
160  if (CurCount <= LATCH / 2)
161  delay_count &= ~calib_bit;
162  }
163 
164  /* We're finished: Do the finishing touches */
165 
166  /* Calculate delay_count for 1ms */
167  delay_count /= (MILLISEC / 2);
168 }
unsigned char * PUCHAR
Definition: retypes.h:3
static ULONG Read8254Timer(VOID)
Definition: pchw.c:68
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
static VOID WaitFor8254Wraparound(VOID)
Definition: pchw.c:81
#define LATCH
Definition: pchw.c:37
#define WRITE_PORT_UCHAR(p, d)
Definition: pc98vid.h:20
#define PRECISION
Definition: pchw.c:28
#define MILLISEC
Definition: pchw.c:27
static unsigned int delay_count
Definition: pchw.c:39
unsigned int ULONG
Definition: retypes.h:1
static VOID __StallExecutionProcessor(ULONG Loops)
Definition: pchw.c:54

◆ RDTSC()

ULONGLONG RDTSC ( VOID  )

◆ StallExecutionProcessor()

VOID StallExecutionProcessor ( ULONG  Microseconds)