From 435b712f2542f62c8325844125ea750bc36c3288 Mon Sep 17 00:00:00 2001
From: Imbus <>
Date: Tue, 9 Sep 2025 12:10:05 +0200
Subject: [PATCH] Freelist testing in start

---
 kern/start.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/kern/start.c b/kern/start.c
index c892765..7d0e855 100644
--- a/kern/start.c
+++ b/kern/start.c
@@ -2,6 +2,7 @@
 #include <banner.h>
 #include <buddy.h>
 #include <config.h>
+#include <freelist.h>
 #include <memory.h>
 #include <panic.h>
 #include <proc.h>
@@ -11,6 +12,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <uart.h>
+#include <util.h>
 
 /**
  * Allocate one stack per CPU (hart).
@@ -39,7 +41,7 @@ void start() {
     // cpu (struct Cpu).
     write_tp(id);
 
-    if (id == 0) {
+    if (unlikely(id == 0)) {
         /* Here we will do a bunch of initialization steps */
         memory_sweep(heap_start, heap_end);
         buddy_init(heap_start, heap_end);
@@ -60,6 +62,23 @@ void start() {
         else
             PANIC("Some cores seem to have been enumerated incorrectly!\n");
 
+        {
+            FreeList fl;
+            void    *mem = buddy_alloc(4096);
+            fl_init(&fl, (uintptr_t)mem, 4096, sizeof(int));
+
+            uint32_t *hello = fl_alloc(&fl);
+
+            *hello = UINT32_MAX;
+
+            int a = fl_available(&fl);
+            assert_msg(fl_check(&fl) > 0, "FreeList checking failed, might be corrupt.");
+            kprintf("Available: %d\n", a);
+            kprintf("Size: %d\n", fl.size);
+
+            buddy_free(mem);
+        }
+
         kprintf("To exit qemu, press CTRL+a followed by x\n");
         spin_unlock(&sl);
     }