#include "Kernel.h"

Kernel::Kernel(const List<PhysicalPage> &free_pages, const List<PhysicalPage> &busy_pages)
: free_pages(free_pages), busy_pages(busy_pages) {
}


void Kernel::page_fault(PageTable page_table, const int idx) {
    PhysicalPage *page;
    if (!this->free_pages.is_empty()) {
        page = free_pages.last();
        free_pages.remove(page);
        busy_pages.insert_tail(page);
    } else {
        page = nullptr; // TODO: page replacement algorithm
    }
    if (page) {
        page_table[idx].PPN = page->PPN;
        page_table[idx].P = true;
        page_table[idx].R = false;
        page_table[idx].M = false;
    }
}

void Kernel::stat_update() {
    for (int i = 0; i < 10; ++i) {
        // TODO: update busy page stats
    }
}