unsigned int alloc_buddy(int size, buddy_t* tmp_buddy)
{
buddy_t* cur_buddy;
int new_size;
cur_buddy = tmp_buddy;
if(size>1){
new_size = cur_buddy->size/2;
if(tmp_buddy->left==NULL && tmp_buddy->right==NULL){
new_size = tmp_buddy->size/2;
printf("Ok\n");
tmp_buddy->left = create_buddy(new_size);
if(new_size/2>=size) alloc_buddy(size,cur_buddy->left);
else tmp_buddy->status == BUDDY_BUSY;
}
else if(tmp_buddy->left!=NULL && tmp_buddy->status==BUDDY_FREE){
alloc_buddy(size, tmp_buddy->left);
} else if(tmp_buddy->right!=NULL && tmp_buddy->status==BUDDY_FREE){
alloc_buddy(size, tmp_buddy->right);
}
else{
printf("Se sono nell'else allora devo proseguire nella navigazione\n");
alloc_buddy(size/2,tmp_buddy);
}
}
// else printf("Otherwise ok\n");
}
struct page* __pages_alloc (zone_t *zone ,gfp_t flage,uint32_t order)
{
page_t * pf = NULL;
if ((flage & _GFP_ZERO) && (flage & _GFP_HIGH))
panic("(flage & _GFP_ZERO) && (flage & _GFP_HIGH)\n");
pf = alloc_buddy (zone,order);
if(pf == NULL)
goto out;
if (flage & _GFP_ZERO) {
int i = PAGE_SIZE << order;
memset((void*)page2virt(pf),0,i);
}
out:
return pf;
}
