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Implemented a proper libk

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Tom-on
2024-10-09 16:45:37 +02:00
parent 9ff817b935
commit 95d32f025a
45 changed files with 1713 additions and 1524 deletions
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include/interrupt/rtc.h
+6 -135
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@@ -1,13 +1,8 @@
#ifndef INTERRUPT_RTC_H
#define INTERRUPT_RTC_H
#include <interrupt/pic.h>
#include <interrupt/idt.h>
#include <screen/text.h>
#include <screen/gfxmode.h>
#include <terminal/terminal.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#define CMOS_ADDRESS 0x70
#define CMOS_DATA 0x71
@@ -21,134 +16,10 @@ typedef struct {
uint16_t year;
} __attribute__ ((packed)) datetime_t;
static datetime_t* datetime = (datetime_t*)DATETIME_LOC;
bool cmosUpdateProgress() {
outb(CMOS_ADDRESS, 0x8a); // Read status reg A, disable NMI
return inb(CMOS_DATA) & 0x80;
}
uint8_t getRtcRegister(uint8_t reg) {
outb(CMOS_ADDRESS, reg | 0x80); // Disable NMI when sending
return inb(CMOS_DATA);
}
void enableRtc() {
uint8_t regB = getRtcRegister(0x0b);
outb(CMOS_ADDRESS, 0x8b);
outb(CMOS_DATA, regB | 0x40); // Set bit 6 - periodic int at 1024Hz
getRtcRegister(0x0c); // Clear pending interrupts
}
void disableRtc() {
__asm__ volatile ("cli");
uint8_t regB = getRtcRegister(0x0b);
outb(CMOS_ADDRESS, 0x8b);
outb(CMOS_DATA, regB & 0xbf); // Clear bit 6
__asm__ volatile ("sti");
}
__attribute__ ((interrupt)) void rtcHandler(intFrame_t* iframe) {
datetime_t newDatetime, oldDatetime;
static uint16_t rtcTicks = 0;
__asm__ volatile ("cli");
rtcTicks++;
if (rtcTicks % 1024 == 0) { // 1 Second has passed
while (cmosUpdateProgress()); // Wait
newDatetime.second = getRtcRegister(0);
newDatetime.minute = getRtcRegister(2);
newDatetime.hour = getRtcRegister(4);
newDatetime.day = getRtcRegister(7);
newDatetime.month = getRtcRegister(8);
newDatetime.year = getRtcRegister(9);
do {
oldDatetime = newDatetime;
while (cmosUpdateProgress()); // Wait
newDatetime.second = getRtcRegister(0);
newDatetime.minute = getRtcRegister(2);
newDatetime.hour = getRtcRegister(4);
newDatetime.day = getRtcRegister(7);
newDatetime.month = getRtcRegister(8);
newDatetime.year = getRtcRegister(9);
} while (
newDatetime.second != oldDatetime.second ||
newDatetime.minute != oldDatetime.minute ||
newDatetime.hour != oldDatetime.hour ||
newDatetime.day != oldDatetime.day ||
newDatetime.month != oldDatetime.month ||
newDatetime.year != oldDatetime.year
);
uint8_t regB = getRtcRegister(0x0b);
if (!(regB & 0x04)) {
newDatetime.second = (newDatetime.second & 0x0f) + ((newDatetime.second >> 4) * 10);
newDatetime.minute = (newDatetime.minute & 0x0f) + ((newDatetime.minute >> 4) * 10);
newDatetime.hour = ((newDatetime.hour & 0x0F) + (((newDatetime.hour & 0x70) / 16) * 10)) | (newDatetime.hour & 0x80); // 12/24 Hour format bs
newDatetime.day = (newDatetime.day & 0x0f) + ((newDatetime.day >> 4) * 10);
newDatetime.month = (newDatetime.month & 0x0f) + ((newDatetime.month >> 4) * 10);
newDatetime.year = (newDatetime.year & 0x0f) + ((newDatetime.year >> 4) * 10);
}
// Convert 12 to 14 hour format
if (!(regB & 0x02) && (newDatetime.hour & 0x80)) {
newDatetime.hour = ((newDatetime.hour & 0x7f) + 12) % 24;
}
newDatetime.year += 2000; // Add current century
//*datetime = newDatetime;
datetime->second = newDatetime.second;
datetime->minute = newDatetime.minute;
datetime->hour = newDatetime.hour;
datetime->day = newDatetime.day;
datetime->month = newDatetime.month;
datetime->year = newDatetime.year;
if (true) { // TODO: Probably get rid of this idk
char buf[20] = { 0 }; // "12/12 2012 12:12:12" - Max string 20 chars with null byte
strcat(buf, itoa(datetime->day, 10));
strcat(buf, "/");
strcat(buf, itoa(datetime->month, 10));
strcat(buf, " ");
strcat(buf, itoa(datetime->year, 10));
strcat(buf, " ");
if (datetime->hour < 10) strcat(buf, "0");
strcat(buf, itoa(datetime->hour, 10));
strcat(buf, ":");
if (datetime->minute < 10) strcat(buf, "0");
strcat(buf, itoa(datetime->minute, 10));
strcat(buf, ":");
if (datetime->second < 10) strcat(buf, "0");
strcat(buf, itoa(datetime->second, 10));
// The clock is a little offset down (about 0.4 of a character) It does look nice though!
uint8_t len = strlen(buf);
uint32_t x = gfxMode->xRes - len - 1;
char* str = &buf[0];
for (uint8_t i = 0; i != len; i++, x++) {
drawChar(str[i], x, 0, terminal->fg, terminal->bg);
}
}
}
getRtcRegister(0x0c);
sendPicEOI(8);
__asm__ volatile ("sti");
}
void setupRtc() { // IRQ 8 - Real Time Clock
idtSetGate(0x28, rtcHandler, INT_GATE_FLAGS);
unsetIrqMask(8);
enableRtc();
}
bool cmosUpdateProgress();
uint8_t getRtcRegister(uint8_t reg);
void enableRtc();
void disableRtc();
void setupRtc();
#endif