mirror of
https://github.com/Tom-on64/kern.git
synced 2026-11-04 18:43:11 +00:00
374 lines
12 KiB
C
374 lines
12 KiB
C
#include <interrupt/idt.h>
|
|
#include <interrupt/exceptions.h>
|
|
#include <interrupt/syscalls.h>
|
|
#include <interrupt/pic.h>
|
|
#include <interrupt/pit.h>
|
|
#include <interrupt/rtc.h>
|
|
#include <keyboard/keyboard.h>
|
|
|
|
#include <memory/physical.h>
|
|
#include <memory/virtual.h>
|
|
#include <memory/addresses.h>
|
|
#include <memory/malloc.h>
|
|
#include <disk/filesys.h>
|
|
#include <disk/disk.h>
|
|
#include <screen/text.h>
|
|
#include <screen/graphics.h>
|
|
#include <sound/pcspk.h>
|
|
#include <sound/notes.h>
|
|
#include <ports/io.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <color.h>
|
|
|
|
#define PROMPT "#> "
|
|
|
|
// Function declarations
|
|
void printFiletable(char* ft);
|
|
void printPhysicalMemmap();
|
|
|
|
__attribute__ ((section("entry")))
|
|
void main() {
|
|
// Retrieve global variables
|
|
currentPd = (pageDirectory_t*)*(uint32_t*)CURRENT_PAGE_DIR_ADDR; // Don't ask
|
|
memoryMap = (uint32_t*)MEMMAP_AREA;
|
|
maxBlocks = *(uint32_t*)PHYS_MEM_MAX_BLOCKS;
|
|
usedBlocks = *(uint32_t*)PHYS_MEM_USED_BLOCKS;
|
|
|
|
// Interrupt setup
|
|
setupIdt();
|
|
setupExceptions();
|
|
idtSetGate(0x80, syscallHandler, USR_INT_GAME_FLAGS); // Setup Syscall handler in IDT for int 0x80
|
|
disableIrqs();
|
|
remapPic();
|
|
unsetIrqMask(2); // Enable PIC 2 line
|
|
__asm__ volatile ("sti");
|
|
|
|
setupTimer();
|
|
setupRtc();
|
|
setupKeyboard();
|
|
|
|
// Screen setup
|
|
loadFont("term16n.fnt");
|
|
terminal->fg = FG_COLOR;
|
|
terminal->bg = BG_COLOR;
|
|
clear();
|
|
print("kern.\n\n");
|
|
|
|
// Run Interactive Shell Program
|
|
// TODO: Make it in another file
|
|
while (1) {
|
|
print(PROMPT);
|
|
char input[256];
|
|
read(input);
|
|
|
|
if (input[0] == '\n') continue;
|
|
|
|
char* args;
|
|
if ((args = strchr(input, ' ')) == NULL) {
|
|
args = strchr(input, '\n');
|
|
}
|
|
|
|
*args++ = '\0'; // Separate command from args
|
|
|
|
if (strcmp(input, "clear") == 0) {
|
|
clear();
|
|
} else if (strcmp(input, "echo") == 0) {
|
|
char* str = args;
|
|
char* printStr = args;
|
|
|
|
while (*args != '\0') {
|
|
if (*args == '\\') {
|
|
args++;
|
|
if (*args == 'n') *str++ = '\n';
|
|
else if (*args == 'b') *str++ = '\b';
|
|
else if (*args == 'e') *str++ = '\x1b';
|
|
else if (*args == '\\') *str++ = '\\';
|
|
else {
|
|
*str++ = '\\';
|
|
*str++ = *args;
|
|
}
|
|
args++;
|
|
} else {
|
|
*str++ = *args++;
|
|
}
|
|
}
|
|
*str = '\0';
|
|
print(printStr);
|
|
} else if (strcmp(input, "exit") == 0) {
|
|
break;
|
|
} else if (strcmp(input, "gfx") == 0) {
|
|
clear();
|
|
|
|
// Draw some stuff :)
|
|
for (size_t i = 0; i < 120; i++) {
|
|
for (size_t j = 0; j < 120; j++) {
|
|
drawPixel(200 + i, 200 + j, GREEN);
|
|
}
|
|
}
|
|
|
|
fillRect(200, 200, 320, 320, GREEN);
|
|
|
|
drawLine(200, 200, 320, 320, RED);
|
|
drawLine(320, 200, 200, 320, RED);
|
|
|
|
drawLine(800, 300, 900, 400, BLUE);
|
|
drawLine(900, 400, 1000, 300, BLUE);
|
|
drawLine(1000, 300, 900, 200, BLUE);
|
|
drawLine(900, 200, 800, 300, BLUE);
|
|
|
|
drawLine(400, 350, 420, 100, rgb(0xee, 0x9f, 0x00));
|
|
|
|
drawTriangle(200, 400, 400, 600, 200, 600, MAGENTA);
|
|
fillTriangle(750, 400, 800, 450, 700, 450, CYAN);
|
|
drawTriangle(960, 400, 1000, 500, 990, 580, YELLOW);
|
|
|
|
drawRect(100, 650, 800, 900, rgb(0xe0, 0x0a, 0x3a));
|
|
|
|
drawCircle(1500, 600, 300, WHITE);
|
|
fillCircle(950, 750, 75, rgb(0xa2, 0xd6, 0xf9));
|
|
|
|
getc(); // Wait until we get a 'q'
|
|
clear();
|
|
} else if (strcmp(input, "help") == 0) {
|
|
print("Available Commands:\n");
|
|
print(" clear | Clears the screen\n");
|
|
print(" echo | Prints a message to stdout\n");
|
|
print(" exit | Exits shell\n");
|
|
print(" gfx | Does a graphics test\n");
|
|
print(" help | Prints this message\n");
|
|
print(" ls | Lists all available files\n");
|
|
print(" memmap | Prints the memory map and info\n");
|
|
print(" reboot | Reboots the system\n");
|
|
print(" sleep | Sleeps for input number of seconds\n");
|
|
print(" soundtest | Plays a tune :)\n");
|
|
print(" test | Performs tests\n");
|
|
} else if (strcmp(input, "ls") == 0) {
|
|
printFiletable(filetable);
|
|
} else if (strcmp(input, "memmap") == 0) {
|
|
printPhysicalMemmap();
|
|
} else if (strcmp(input, "reboot") == 0) {
|
|
outb(0x64, 0xFE);
|
|
} else if (strcmp(input, "sleep") == 0) {
|
|
if (*args == '\0') continue;
|
|
|
|
uint32_t ms = atoi(args) * 1000; // Convert seconds to miliseconds
|
|
if (ms == 0) continue;
|
|
|
|
sleep(ms);
|
|
} else if (strcmp(input, "soundtest") == 0) {
|
|
print("Playing...\n");
|
|
enableSpeaker();
|
|
|
|
/*
|
|
* Megalovania - Toby Fox
|
|
* |-D-D-d--A---Ab--G--F--D-F-G-| (Goofy ahh notation)
|
|
* (The timing may be off)
|
|
*/
|
|
for (uint8_t i = 0; i < 4; i++) {
|
|
note_t first[4] = { D4, C4, H3, Hb3 };
|
|
playNote(first[i], 120);
|
|
playNote(first[i], 120);
|
|
playNote(D5, 240);
|
|
playNote(A4, 360);
|
|
playNote(Ab4, 240);
|
|
playNote(G4, 240);
|
|
playNote(F4, 240);
|
|
playNote(D4, 120);
|
|
playNote(F4, 120);
|
|
playNote(G4, 120);
|
|
}
|
|
rest(120);
|
|
|
|
disableSpeaker();
|
|
} else if (strcmp(input, "test") == 0) {
|
|
print("Running Tests...\n");
|
|
uint8_t buf[512];
|
|
|
|
print("Read Test .......... ");
|
|
diskRead(0, 1, (char*)buf);
|
|
if (buf[510] == 0x55 && buf[511] == 0xaa) {
|
|
print("[ DONE ]\n");
|
|
} else {
|
|
print("[ FAIL ]\n");
|
|
}
|
|
print("Write Test ......... ");
|
|
buf[510] = 0x55; buf[511] = 0xaa;
|
|
diskWrite(0, 1, (char*)buf);
|
|
diskRead(0, 1, (char*)buf); // Idk how else to test if the right data was written (also could break the bootloader if it fails)
|
|
if (buf[510] == 0x55 && buf[511] == 0xaa) {
|
|
print("[ DONE ]\n");
|
|
} else {
|
|
print("[ FAIL ]\n");
|
|
}
|
|
print("Malloc Test ........ ");
|
|
void* buffer = malloc(100);
|
|
free(buffer);
|
|
print("[ DONE ]\n");
|
|
|
|
print("\nTests Finished!\n");
|
|
} else {
|
|
fileEntry_t* file = findFile(input);
|
|
|
|
if (file == NULL) {
|
|
print("Command not found: ");
|
|
print(input);
|
|
putc('\n');
|
|
continue;
|
|
}
|
|
|
|
uint32_t neededPages = (file->length * 512) / PAGE_SIZE;
|
|
if ((file->length * 512) % PAGE_SIZE > 0) { neededPages++; }
|
|
|
|
char* entryPoint = (char*)0x400000; // Right after first 4MB
|
|
for (uint32_t i = 0; i < neededPages; i++) {
|
|
ptEntry_t page = 0;
|
|
uint32_t physicalAddress = (uint32_t)allocPage(&page);
|
|
|
|
if (mapPage((void*)physicalAddress, (void*)(entryPoint + i * PAGE_SIZE)) != 0) {
|
|
print("\n\x1b[1MNot enough memory to allocate!\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
readFile(input, entryPoint);
|
|
|
|
if (strcmp(file->filetype, "bin") == 0) {
|
|
// Reset malloc
|
|
mallocListHead = NULL;
|
|
mallocVirtualAddr = (uint32_t)entryPoint + neededPages * PAGE_SIZE;
|
|
mallocPhysicalAddr = 0;
|
|
mallocPages = 0;
|
|
|
|
((void(*)(void))entryPoint)(); // Call program
|
|
|
|
for (uint32_t i = 0, virtualAddr = mallocVirtualAddr; i < mallocPages; i++, virtualAddr += PAGE_SIZE) {
|
|
ptEntry_t* page = getPage(virtualAddr);
|
|
|
|
if (PAGE_PHYS_ADDRESS(page) && TEST_ATTR(page, PTE_PRESENT)) {
|
|
freePage(page);
|
|
unmapPage((void*)virtualAddr);
|
|
flushTlbEntry(virtualAddr);
|
|
}
|
|
}
|
|
|
|
mallocListHead = NULL;
|
|
mallocVirtualAddr = 0;
|
|
mallocPhysicalAddr = 0;
|
|
mallocPages = 0;
|
|
} else if (strcmp(file->filetype, "tab") == 0) {
|
|
printFiletable(entryPoint);
|
|
} else if (strcmp(file->filetype, "fnt") == 0) {
|
|
print("Loading ");
|
|
print(file->filename);
|
|
print("...\n");
|
|
memcpy(entryPoint, (char*)FONT_LOC, file->length * 512);
|
|
print("Font loaded\n");
|
|
} else {
|
|
for (size_t i = 0; i < file->length * 512; i++) {
|
|
if (entryPoint[i] != '\0') {
|
|
putc(entryPoint[i]);
|
|
}
|
|
}
|
|
putc('\n');
|
|
}
|
|
|
|
for (uint32_t i = 0, virtualAddr = (uint32_t)entryPoint; i < neededPages; i++, virtualAddr += PAGE_SIZE) {
|
|
ptEntry_t* page = getPage(virtualAddr);
|
|
if (PAGE_PHYS_ADDRESS(page) && TEST_ATTR(page, PTE_PRESENT)) { // Check if the page is used
|
|
freePage(page);
|
|
unmapPage((void*)virtualAddr);
|
|
flushTlbEntry(virtualAddr); // Invalidate unused page
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
outw(0x604, 0x2000); // QEMU - Quit emulator
|
|
while (1); // Just hang
|
|
}
|
|
|
|
void printFiletable(char* ft) {
|
|
while (*ft != '\0') {
|
|
char filename[15] = { 0 };
|
|
uint8_t offset = 0;
|
|
for (uint8_t i = 0; i < 14; i++) {
|
|
if (i == 9) {
|
|
filename[offset++] = '.';
|
|
continue;
|
|
}
|
|
if (*ft != '\0') { filename[offset++] = *ft; }
|
|
ft++;
|
|
}
|
|
ft++; // RESERVED
|
|
|
|
uint8_t sector = *ft++;
|
|
uint8_t size = *ft++;
|
|
|
|
if (sector < 10) putc('0');
|
|
if (sector == 0) putc('0');
|
|
else print(itoa(sector, 10));
|
|
print(": ");
|
|
print(filename);
|
|
|
|
for (uint8_t i = 14 - strlen(filename); i > 0; i--) {
|
|
putc(' ');
|
|
}
|
|
|
|
print(" | ");
|
|
if (size >> 1) {
|
|
print(itoa(size >> 1, 10));
|
|
if (size & 0x01) { print(".5"); }
|
|
print("kB\n");
|
|
} else {
|
|
print(itoa(size*512, 10));
|
|
print("B\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
void printPhysicalMemmap() {
|
|
uint32_t entryCount = *(uint32_t*)SMAP_ENTRY_COUNT;
|
|
smapEntry_t* smapEntry = (smapEntry_t*)SMAP_ENTRIES;
|
|
|
|
for (uint32_t i = 0; i < entryCount; i++) {
|
|
print("Region ");
|
|
print(itoa(i, 10));
|
|
print(" - base: 0x");
|
|
print(itoa(smapEntry->baseAddress, 16));
|
|
print(" length: 0x");
|
|
print(itoa(smapEntry->length, 16));
|
|
print(" type: ");
|
|
print(itoa(smapEntry->type, 10));
|
|
|
|
switch (smapEntry->type) {
|
|
case 1: print(" (Available)"); break;
|
|
case 2: print(" (Reserved)"); break;
|
|
case 3: print(" (ACPI Reclaim)"); break;
|
|
case 4: print(" (ACPI NVS)"); break;
|
|
default: print(" (Reserved)"); break;
|
|
}
|
|
|
|
putc('\n');
|
|
smapEntry++;
|
|
}
|
|
|
|
smapEntry--; // We incremented it after the last entry
|
|
|
|
print("\nTotal memory: 0x");
|
|
print(itoa(smapEntry->baseAddress + smapEntry->length - 1, 16));
|
|
print(" Bytes\n");
|
|
|
|
print("Total 4kB Blocks: ");
|
|
print(itoa(maxBlocks, 10));
|
|
print("\nUsed or reserved blocks: ");
|
|
print(itoa(usedBlocks, 10));
|
|
print("\nFree blocks: ");
|
|
print(itoa(maxBlocks - usedBlocks, 10));
|
|
print("\n\n");
|
|
}
|
|
|