Small kernel heap for VMM internals, kmalloc/kfree

src/mem/heap/kheap.h

@@ -0,0 +1,26 @@
+#ifndef KHEAP_H
+#define KHEAP_H
+
+// We need some kind of simple kernel heap to make our linked list
+// for the VMM, as we need "malloc" and "free" for that data structure.
+// When the kernel heap is ready, we can alloc our VM object linked list
+// and then continue working on the VMM.
+
+// 16MB should be enough for some linked lists
+#define KHEAP_SIZE (16*1024*1024)
+
+#include <stdbool.h>
+#include <stddef.h>
+
+struct heap_block_t
+{
+    size_t size;
+    bool free;
+    struct heap_block_t* next;
+};
+
+void kheap_init();
+void* kmalloc(size_t size);
+void kfree(void* ptr);
+
+#endif