//----------------------------------------------------------------------------// // GNU GPL OS/K // // // // Desc: RTC Time related functions // // // // // // Copyright © 2018-2019 The OS/K Team // // // // This file is part of OS/K. // // // // OS/K is free software: you can redistribute it and/or modify // // it under the terms of the GNU General Public License as published by // // the Free Software Foundation, either version 3 of the License, or // // any later version. // // // // OS/K is distributed in the hope that it will be useful, // // but WITHOUT ANY WARRANTY//without even the implied warranty of // // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // // GNU General Public License for more details. // // // // You should have received a copy of the GNU General Public License // // along with OS/K. If not, see . // //----------------------------------------------------------------------------// #include #include #include #define COUNTDONE 1 #define PIT_FREQUENCY 100 // Hz = 10ms static TimerFilo_t timerFilo[20]; //20 concurrent sleep max static ulong Ticks = 0; // // ISR handler for the Programmable Interval Timer // static void HandlePIT(ISRFrame_t *regs) { for (uchar i = 0; i < 20; i++) { // debug //DebugLog("Hello world of PIT ticks !\n"); // if (timerFilo[i].countDown > 0) { timerFilo[i].countDown--; if (timerFilo[i].countDown == 0) i; //XXX SendMessage a message to timerFifo[i].sema that COUNTDONE; } KeSendEOItoPIC(0x28); } } static TimerFilo_t* KeFindTimerBlock(void) { for(uchar i = 0; i < 20; i++) { if (timerFilo[i].countDown == 0) return &timerFilo[i]; } return NULL; } void KeSleep(uint delay) { struct TimerFilo_t *timerBlock; if ((timerBlock = (TimerFilo_t*)KeFindTimerBlock()) == NULL) return; timerBlock->countDown = delay; // wait for a message on timerFifo[i].sema } void KeEnablePIT(void) { ulong flags = KePauseIRQs(); char readIrqs; uint divisor = 1193180 / PIT_FREQUENCY; KeRegisterISR(HandlePIT, 0x20); IoWriteByteOnPort(0x43, 0x36); // 0x34 = 00110100 for rate gen IoWriteByteOnPort(0x40, (char)(divisor & 0xFF )); // low byte of freq IoWriteByteOnPort(0x40, (char)((divisor >> 8)& 0xFF)); // high byte of freq // Setting up the IRQs KeUnmaskIRQ(0); DebugLog("\tPIT activated with rate generator mode 10ms\n"); KeRestoreIRQs(flags); KeEnableNMI(); }