ptos: pm: Print usable memory in pretty units

Signed-off-by: Chloe M <chloe@yiffware.org>

service/ptos/mm/pm.c

@@ -11,6 +11,7 @@
 #include <ke/bpal.h>
 #include <ex/trace.h>
 #include <string.h>
+#include <units.h>
 
 #define DTRACE(Fmt, ...) \
     TRACE("[ PM ]: " Fmt, ##__VA_ARGS__)
@@ -66,6 +67,30 @@ typedef struct {
 /* Standard usable memory list */
 static MM_PFD_LIST AvlList;
 
+/* Memory statistics */
+static USIZE UsableMemory;
+
+/*
+ * Used to convert bytes into human readable units
+ */
+static inline VOID
+PmZoneSize(const CHAR *TypeName, USIZE Length)
+{
+    if (TypeName == NULL) {
+        return;
+    }
+
+    if (Length >= UNIT_GIB) {
+        DTRACE("%s : %d GiB\n", TypeName, Length / UNIT_GIB);
+    } else if (Length >= UNIT_MIB) {
+        DTRACE("%s : %d MiB\n", TypeName, Length / UNIT_MIB);
+    } else if (Length >= UNIT_KIB) {
+        DTRACE("%s : %d KiB\n", TypeName, Length / UNIT_KIB);
+    } else {
+        DTRACE("%s : %d bytes\n", TypeName, Length);
+    }
+}
+
 /*
  * Appends a page frame descriptor to a page frame descriptor
  * list.
@@ -179,9 +204,12 @@ PmProbe(VOID)
         }
 
         ++ZoneCount;
+        UsableMemory += Entry.Length;
     }
 
+    /* Log some statistics */
     DTRACE("%d pfds, %d zones\n", PfdCount, ZoneCount);
+    PmZoneSize("usable", UsableMemory);
 }
 
 MM_PFN