Implementation of simplistic physical memory manager

src/kernel/kstructures/bitmap.h

@@ -0,0 +1,40 @@
+#pragma once 
+#include <stddef.h>
+#include <stdint.h>
+
+
+inline void bitmap_set( uint32_t* map , int index )
+{
+    map[index/32] |= (1 << (index % 32));
+}
+
+inline void bitmap_unset(uint32_t* map , int index)
+{
+    map[index/32] &= ~(1 << (index % 32));
+}
+
+inline int bitmap_first_unset( uint32_t* map , int size)
+{
+    uint32_t rem_bits = size % 32;
+    for(uint32_t i = 0; i < size/32; i++)
+    {
+        if(map[i] != 0xFFFFFFFF){
+            for(int j = 0; j < 32; j++){
+                if(!(map[i] & (1<< j))){
+                    return (i*32) + j;
+                }
+            }
+        }
+    }
+
+    if(rem_bits){
+        for(uint32_t j = 0; j < rem_bits; j++){
+            if(!(map[size/32] & (1 << j ))){
+                return size + j; // Original author divided size by 32 and then multiplied it by 32 which is a net zero calculation ?!?
+            }
+        }
+    }
+
+    return -1;
+    
+}