vmm.h

// Charmander - a new virtual memory manager by NDRAEY (c) 2023
// for SayoriOS
//
// Created by ndraey on 05.11.23.
//
 
#pragma once
 
#include <common.h>
#include "lib/string.h"
 
// #define kfree_debug(ptr) do { qemu_note("FREE BLOCK (%x) at %s:%d", ptr, __FILE__, __LINE__); kfree(ptr); } while(0);
 
struct heap_entry {
    size_t address;
    size_t length;
};
 
typedef struct heap {
    size_t allocated_count;
    size_t capacity; // Entries
    size_t start;
    size_t used_memory;
    struct heap_entry* memory;
} heap_t;
 
extern heap_t system_heap;
 
void vmm_init();
void *alloc_no_map(size_t size, size_t align);
void free_no_map(void* ptr);
bool vmm_is_page_used_by_entries(size_t address);
void* kmalloc_common(size_t size, size_t align)  __attribute__((__malloc__)) __attribute__((__alloc_size__(1)));
 
SAYORI_INLINE void* kmalloc(size_t size) {
//  return kmalloc_common(size, sizeof(size_t));  // Alignment, blyad
    return kmalloc_common(size, 0);
}
 
void* krealloc(void* ptr, size_t memory_size);
void kfree(void* ptr);
void* clone_kernel_page_directory(size_t virts_out[1024]);
 
void vmm_debug_switch(bool enable);
 
SAYORI_INLINE void* kcalloc(size_t size, size_t amount) {
    void* x = kmalloc(size * amount);
 
    memset(x, 0, size * amount);
 
    return x;
}