module memory;

import arch;
import io;

const int pagesize = 4096;
var int ptr;

// Let the heap grow upwards..

public function void init()
{
    ptr = 0x60080000;
}

public function byte* alloc(int size)
{
    var int ptr2;
    ptr2 = ptr;

    io.print2("alloc size ", size);
    io.print2("alloc address ", ptr);

    // Increment new free point:
    ptr = ptr + size;
    return ptr2;
}

function bool is_marked(int page)
{
    return true;
}

function void set_mark(int page, bool mark)
{

}

function byte* allocate_physical()
{
    var int i;
    for (i = 0; i < 100; i += 1)
    {
        if (not is_marked(i))
        {
            return i * pagesize;
        }
    }

    return 0;
}

function byte* allocate_virtual(byte* address)
{
    var byte* address2;
    address2 = allocate_physical();
    return address2;
}

// Util function:
public function void memcpy(byte* dst, byte* src, int size)
{
    var int i;
    io.print2("memcpy to ", cast<int>(dst));
    io.print2("memcpy from ", cast<int>(src));
    io.print2("memcpy size ", size);
    for (i = 0; i < size; i += 1)
    {
        *(dst + i) = *(src + i);
    }
}