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#include "Pic.h"
bool SingletonPic::isEntityAfter = false;
ICW1::ICW1(const uint8 icw)
{
word = byteHigh | (icw & 0x0f);
};
ICW1::ICW1()
{
word = wordDefault;
};
bool ICW1::isExpectIcw4()
{
return word & IC4;
};
const uint8 ICW1::toByteMasterPic() const
{
return word;
}
const uint8 ICW1::toByteSlavePic() const
{
return word;
}
const uint8 ICW1::getNumber() const
{
return 1;
};
ICW2::ICW2()
{
lvtAddr = mngIdt.getIrqInterruptStart();
};
ICW2::ICW2(const uint8 icw)
{
if(icw >= 0xff - Pic::numberIrq) lvtAddr = MngIdt::firstSystemIntNumber;
else lvtAddr = icw;
};
const uint8 ICW2::getNumber() const
{
return 2;
};
const uint8 ICW2::toByteMasterPic() const
{
if(lvtAddr >= 0xff - Pic::numberIrq) return MngIdt::firstSystemIntNumber;
else return lvtAddr;
};
const uint8 ICW2::toByteSlavePic() const
{
if(lvtAddr >= 0xff - 8) return MngIdt::firstSystemIntNumber + 8;
else return lvtAddr + 8;
};
ICW3::ICW3()
{
irqConnPrimaryPic = irqTwoLine;
irqConnSecondaryPic = irqTwoLineBinary;
};
ICW3::ICW3(const uint8 icwMaster)
{
uint8 oneAmount = 0;
uint8 icwMasterCpy = icwMaster;
while(icwMasterCpy)
{
oneAmount += icwMasterCpy & 0x01;
icwMasterCpy >>= 1;
}
if(oneAmount > 1)
{
*this = ICW3();
}
else
{
irqConnPrimaryPic = icwMaster;
uint8 icwMasterBinary = 0;
icwMasterCpy = icwMaster;
while(icwMasterCpy)
{
icwMasterBinary++;
icwMasterCpy >>= 1;
}
irqConnSecondaryPic = icwMasterBinary;
}
};
const uint8 ICW3::toByteMasterPic() const
{
return irqConnPrimaryPic;
};
const uint8 ICW3::toByteSlavePic() const
{
return irqConnSecondaryPic;
};
const uint8 ICW3::getNumber() const
{
return 3;
};
ICW4::ICW4()
{
word = defaultWord;
};
ICW4::ICW4(uint8 icw)
{
word = icw & 0x1f;
};
const uint8 ICW4::toByteMasterPic() const
{
return word;
};
const uint8 ICW4::toByteSlavePic() const
{
return word;
};
const uint8 ICW4::getNumber() const
{
return 4;
};
bool Pic::isIcwsCorrect(const ICW *icws[numberWords])
{
for(uint8 idx = 0; idx < numberWords; idx++)
{
const ICW *currIcw = icws[idx];
if(currIcw->getNumber() != idx + 1)
{
return false;
}
}
return true;
};
void Pic::disableIrq(uint8 irqNumber)
{
bool isMasterPic = irqNumber < 8;
uint8 irqBits = 0x1 << (isMasterPic ? irqNumber : irqNumber - 8);
uint8 imr = PortOps::inb(isMasterPic ? PICM_DATA : PICS_DATA);
uint8 port = isMasterPic ? PICM_DATA : PICS_DATA;
PortOps::outb(port, imr | irqBits);
};
bool Pic::enableIrq(uint8 irqNumber)
{
bool isMasterPic = irqNumber < 8;
uint8 irqBits = ~(0x1 << (isMasterPic ? irqNumber : irqNumber - 8));
uint8 imr = PortOps::inb(isMasterPic ? PICM_DATA : PICS_DATA);
if(!mngIdt.isInterruptSet(mngIdt.getIrqInterruptStart() + irqNumber))
{
// ISR not set in IDT
return true;
}
uint8 port = isMasterPic ? PICM_DATA : PICS_DATA;
PortOps::outb(port, imr & irqBits);
return false;
};
void Pic::disable()
{
// Stop recive interrupts
PortOps::outb(PICM_DATA, 0xff);
PortOps::outb(PICS_DATA, 0xff);
};
Pic::Pic(const ICW *icws[numberWords])
{
if(!isIcwsCorrect(icws))
{
*this = Pic();
return;
}
// Set ICW1 to command registers
PortOps::outb(PICM_CTRL, icws[NULL]->toByteMasterPic());
PortOps::outb(PICS_CTRL, icws[NULL]->toByteSlavePic());
for(uint8 idx = 1; idx < numberWords; idx++)
{
const ICW *currIcw = icws[idx];
if((icws[0]->toByteMasterPic() & IC4) or idx < 3)
{
PortOps::outb(PICM_DATA, currIcw->toByteMasterPic());
PortOps::outb(PICS_DATA, currIcw->toByteSlavePic());
}
}
// Clear data registers
PortOps::outb(PICM_DATA, 0x0);
PortOps::outb(PICS_DATA, 0x0);
// Set properties
icw1 = ICW1(*(ICW1 *)icws[0]);
icw2 = ICW2(*(ICW2 *)icws[1]);
icw2 = ICW2(*(ICW2 *)icws[2]);
icw2 = ICW2(*(ICW2 *)icws[3]);
// Disable interrupt recieve
Pic::disable();
};
Pic::Pic()
{
ICW1 icw1;
ICW2 icw2;
ICW3 icw3;
ICW4 icw4;
const ICW *icws[numberWords] = {&icw1, &icw2, &icw3, &icw4};
*this = Pic(icws);
};
uint8 Pic::getIsrMaster()
{
PortOps::outb(PICM_CTRL, readIsr);
return PortOps::inb(PICM_CTRL);
};
uint8 Pic::getIsrSlave()
{
PortOps::outb(PICS_CTRL, readIsr);
return PortOps::inb(PICS_CTRL);
};
void Pic::sendEoi()
{
// Recognize is the interrupt running and on which PIC is it
// Further, check AEOI bit in ICW4
// Send EOI if AEOI bit not set
uint16 isrFull = (uint16)getIsrSlave() << Pic::numberIrq | (uint16)getIsrMaster();
bool intOnMaster = (isrFull & 0x00ff) > 0;
bool intOnSlave = (isrFull & 0xff00) > 0;
// Interrupt not executed - EOI not send
if(intOnMaster == 0 and intOnSlave == 0) return;
// Interrupt expected only on master PIC
else if(intOnMaster and !intOnSlave)
{
PortOps::outb(PICM_CTRL, eoiCommand);
}
// Interrupt expected only on slave PIC
else if(!intOnMaster and intOnSlave)
{
PortOps::outb(PICS_CTRL, eoiCommand);
}
};
SingletonPic::SingletonPic() : Pic()
{
if(isEntityAfter == false)
{
isEntityFirst = true;
isEntityAfter = true;
}
else
{
isEntityFirst = false;
}
};
SingletonPic::SingletonPic(const ICW *icws[numberWords]) : Pic(icws)
{
if(isEntityAfter == false)
{
isEntityFirst = true;
isEntityAfter = true;
}
else
{
isEntityFirst = false;
}
};
Pic *SingletonPic::getInstance()
{
if(isEntityFirst) return (Pic *)this;
return nullptr;
};
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