ReactOS 0.4.15-dev-7659-ga55345b
pic.h File Reference
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Macros

#define PIC_MASTER_CMD   0x20
 
#define PIC_MASTER_DATA   0x21
 
#define PIC_SLAVE_CMD   0xA0
 
#define PIC_SLAVE_DATA   0xA1
 
#define PIC_ICW1   0x10
 
#define PIC_ICW1_ICW4   (1 << 0)
 
#define PIC_ICW1_SINGLE   (1 << 1)
 
#define PIC_ICW4_8086   (1 << 0)
 
#define PIC_ICW4_AEOI   (1 << 1)
 
#define PIC_OCW2_NUM_MASK   0x07
 
#define PIC_OCW2_EOI   (1 << 5)
 
#define PIC_OCW2_SL   (1 << 6)
 
#define PIC_OCW3   (1 << 3)
 
#define PIC_OCW3_READ_ISR   0x0B
 

Functions

VOID PicInterruptRequest (BYTE Number)
 
BYTE PicGetInterrupt (VOID)
 
VOID PicInitialize (VOID)
 

Macro Definition Documentation

◆ PIC_ICW1

#define PIC_ICW1   0x10

Definition at line 20 of file pic.h.

◆ PIC_ICW1_ICW4

#define PIC_ICW1_ICW4   (1 << 0)

Definition at line 21 of file pic.h.

◆ PIC_ICW1_SINGLE

#define PIC_ICW1_SINGLE   (1 << 1)

Definition at line 22 of file pic.h.

◆ PIC_ICW4_8086

#define PIC_ICW4_8086   (1 << 0)

Definition at line 23 of file pic.h.

◆ PIC_ICW4_AEOI

#define PIC_ICW4_AEOI   (1 << 1)

Definition at line 24 of file pic.h.

◆ PIC_MASTER_CMD

#define PIC_MASTER_CMD   0x20

Definition at line 15 of file pic.h.

◆ PIC_MASTER_DATA

#define PIC_MASTER_DATA   0x21

Definition at line 16 of file pic.h.

◆ PIC_OCW2_EOI

#define PIC_OCW2_EOI   (1 << 5)

Definition at line 27 of file pic.h.

◆ PIC_OCW2_NUM_MASK

#define PIC_OCW2_NUM_MASK   0x07

Definition at line 26 of file pic.h.

◆ PIC_OCW2_SL

#define PIC_OCW2_SL   (1 << 6)

Definition at line 28 of file pic.h.

◆ PIC_OCW3

#define PIC_OCW3   (1 << 3)

Definition at line 30 of file pic.h.

◆ PIC_OCW3_READ_ISR

#define PIC_OCW3_READ_ISR   0x0B

Definition at line 31 of file pic.h.

◆ PIC_SLAVE_CMD

#define PIC_SLAVE_CMD   0xA0

Definition at line 17 of file pic.h.

◆ PIC_SLAVE_DATA

#define PIC_SLAVE_DATA   0xA1

Definition at line 18 of file pic.h.

Function Documentation

◆ PicGetInterrupt()

BYTE PicGetInterrupt ( VOID  )

Definition at line 244 of file pic.c.

245{
246 UINT i;
247
248 /* Search the master PIC interrupts by priority */
249 for (i = 0; i < 8; i++)
250 {
251 if (MasterPic.IntRequestRegister & (1 << i))
252 {
253 /* Clear the IRR flag */
254 MasterPic.IntRequestRegister &= ~(1 << i);
255
256 /* Set the ISR flag, unless AEOI is enabled */
258
259 /* Return the interrupt number */
260 return MasterPic.IntOffset + i;
261 }
262 }
263
264 /* Search the slave PIC interrupts by priority */
265 for (i = 0; i < 8; i++)
266 {
267 if (SlavePic.IntRequestRegister & (1 << i))
268 {
269 /* Clear the IRR flag */
270 SlavePic.IntRequestRegister &= ~(1 << i);
271
272 if ((i == 1) && SlavePic.CascadeRegisterSet)
273 {
274 /* This interrupt is routed to the master PIC */
276 }
277 else
278 {
279 /* Set the ISR flag, unless AEOI is enabled */
281
282 /* Return the interrupt number */
283 return SlavePic.IntOffset + i;
284 }
285 }
286 }
287
288 /* Spurious interrupt */
289 if (MasterPic.InServiceRegister & (1 << 2))
290 return SlavePic.IntOffset + 7;
291 else
292 return MasterPic.IntOffset + 7;
293}
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
unsigned int UINT
Definition: ndis.h:50
BYTE CascadeRegister
Definition: pic.c:32
BOOLEAN CascadeRegisterSet
Definition: pic.c:33
BYTE IntOffset
Definition: pic.c:30
BYTE IntRequestRegister
Definition: pic.c:28
BOOLEAN AutoEoi
Definition: pic.c:34
BYTE InServiceRegister
Definition: pic.c:29
static PIC MasterPic
Definition: pic.c:39
static PIC SlavePic
Definition: pic.c:39

Referenced by EmulatorIntAcknowledge().

◆ PicInitialize()

VOID PicInitialize ( VOID  )

Definition at line 295 of file pic.c.

296{
297 /* Register the I/O Ports */
302}
static BYTE WINAPI PicReadCommand(USHORT Port)
Definition: pic.c:43
static BYTE WINAPI PicReadData(USHORT Port)
Definition: pic.c:120
static VOID WINAPI PicWriteCommand(USHORT Port, BYTE Data)
Definition: pic.c:66
static VOID WINAPI PicWriteData(USHORT Port, BYTE Data)
Definition: pic.c:129
#define PIC_SLAVE_DATA
Definition: pic.h:18
#define PIC_MASTER_CMD
Definition: pic.h:15
#define PIC_SLAVE_CMD
Definition: pic.h:17
#define PIC_MASTER_DATA
Definition: pic.h:16
VOID RegisterIoPort(USHORT Port, EMULATOR_INB_PROC InHandler, EMULATOR_OUTB_PROC OutHandler)
Definition: io.c:320

Referenced by EmulatorInitialize().

◆ PicInterruptRequest()

VOID PicInterruptRequest ( BYTE  Number)

Definition at line 192 of file pic.c.

193{
194 BYTE i;
195
196 if (/* Number >= 0 && */ Number < 8)
197 {
198 /* Check if any of the higher-priority interrupts are busy */
199 for (i = 0; i <= Number; i++)
200 {
201 if (MasterPic.InServiceRegister & (1 << Number)) return;
202 }
203
204 /* Check if the interrupt is masked */
205 if (MasterPic.MaskRegister & (1 << Number)) return;
206
207 /* Set the appropriate bit in the IRR and interrupt the CPU */
210 }
211 else if (Number >= 8 && Number < 16)
212 {
213 Number -= 8;
214
215 /*
216 * The slave PIC is connected to IRQ 2, always! If the master PIC
217 * was misconfigured, don't do anything.
218 */
219 if (!(MasterPic.CascadeRegister & (1 << 2))
221 {
222 return;
223 }
224
225 /* Check if any of the higher-priority interrupts are busy */
226 if (MasterPic.InServiceRegister != 0) return;
227 for (i = 0; i <= Number; i++)
228 {
229 if (SlavePic.InServiceRegister & (1 << Number)) return;
230 }
231
232 /* Check if the interrupt is masked */
233 if (SlavePic.MaskRegister & (1 << Number)) return;
234
235 /* Set the IRQ 2 bit in the master ISR */
237
238 /* Set the appropriate bit in the IRR and interrupt the CPU */
241 }
242}
VOID EmulatorInterruptSignal(VOID)
Definition: emulator.c:120
_In_opt_ PENTER_STATE_SYSTEM_HANDLER _In_opt_ PVOID _In_ LONG _In_opt_ LONG volatile * Number
Definition: ntpoapi.h:207
BYTE MaskRegister
Definition: pic.c:27
unsigned char BYTE
Definition: xxhash.c:193

Referenced by call_ica_hw_interrupt(), EmulatorFpu(), GeneratePS2Irq(), PitChan0Out(), RtcPeriodicTick(), and RtcTimeUpdate().