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https://github.com/BoredDevNL/BoredOS.git
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4c21e732fc
BrewOS 1.31 > BrewOS 1.40 Brewkernel 2.3.0 Alpha > Brewkernel 2.3.1 Beta This update is a feature focused update. It features loads of quality of life and major UX improvements. New features: -Drag and drop for files and applications (shortcuts for apps can be made by dragging an app from the start menu into the desktop) -Customizable desktop (auto align, snap to grid -Recycle bin (rm in the CMD skips this)
106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "limine.h"
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#include "graphics.h"
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#include "idt.h"
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#include "ps2.h"
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#include "wm.h"
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#include "io.h"
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#include "memory_manager.h"
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#include "platform.h"
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// --- Limine Requests ---
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__attribute__((used, section(".requests")))
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static volatile LIMINE_BASE_REVISION(2);
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__attribute__((used, section(".requests")))
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static volatile struct limine_framebuffer_request framebuffer_request = {
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.id = LIMINE_FRAMEBUFFER_REQUEST,
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.revision = 1
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};
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__attribute__((used, section(".requests")))
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static volatile struct limine_memmap_request memmap_request = {
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.id = LIMINE_MEMMAP_REQUEST,
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.revision = 0
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};
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__attribute__((used, section(".requests_start")))
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static volatile struct limine_request *const requests_start_marker[] = {
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(struct limine_request *)&framebuffer_request,
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(struct limine_request *)&memmap_request,
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NULL
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};
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__attribute__((used, section(".requests_end")))
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static volatile struct limine_request *const requests_end_marker[] = {
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NULL
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};
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static void hcf(void) {
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asm("cli");
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for (;;) {
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asm("hlt");
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}
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}
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// Kernel Entry Point
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void kmain(void) {
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platform_init();
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// 1. Graphics Init
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if (framebuffer_request.response == NULL || framebuffer_request.response->framebuffer_count < 1) {
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hcf();
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}
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struct limine_framebuffer *fb = framebuffer_request.response->framebuffers[0];
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graphics_init(fb);
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// 2. Interrupts Init
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idt_init();
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// Register ISRs with correct CS
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idt_register_interrupts();
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// Load IDT and Enable Interrupts
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idt_load();
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// 2.5 Memory Manager Init - Calculate available RAM from Limine
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size_t total_usable_memory = 0;
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if (memmap_request.response != NULL) {
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for (uint64_t i = 0; i < memmap_request.response->entry_count; i++) {
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struct limine_memmap_entry *entry = memmap_request.response->entries[i];
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// Count usable memory regions
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if (entry->type == LIMINE_MEMMAP_USABLE) {
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total_usable_memory += entry->length;
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}
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}
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}
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// Initialize memory manager with available memory (cap at 2GB for practical reasons)
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size_t pool_size = total_usable_memory > (2 * 1024 * 1024 * 1024) ?
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(2 * 1024 * 1024 * 1024) : total_usable_memory;
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if (pool_size == 0) {
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pool_size = 512 * 1024 * 1024; // Fallback to 512MB if detection fails
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}
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memory_manager_init_with_size(pool_size);
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// 3. PS/2 Init (Mouse/Keyboard)
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asm("cli");
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ps2_init();
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asm("sti");
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// 4. Window Manager Init (Draws initial desktop)
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wm_init();
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// 5. Main loop - just wait for interrupts
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// Timer interrupt will drive the redraw system
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while (1) {
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wm_process_input();
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asm("hlt");
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}
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}
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