From 60064dbf1b3d2a5ba5ff12cec0e2804474bb1204 Mon Sep 17 00:00:00 2001
From: taiwoabe <143144801+taiwoabe@users.noreply.github.com>
Date: Tue, 24 Sep 2024 18:48:13 -0500
Subject: [PATCH] Update sysproc.c

---
 kernel/sysproc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/kernel/sysproc.c b/kernel/sysproc.c
index 3b4d5bd863..d7ce6b0b41 100644
--- a/kernel/sysproc.c
+++ b/kernel/sysproc.c
@@ -5,6 +5,7 @@
 #include "memlayout.h"
 #include "spinlock.h"
 #include "proc.h"
+#include "mmu.h"
 
 uint64
 sys_exit(void)
@@ -91,3 +92,10 @@ sys_uptime(void)
   release(&tickslock);
   return xticks;
 }
+extern int kfreepages(void);  // Declaration of function that returns free pages
+
+int sys_getfreemem(void) {
+    // Calculate free memory in bytes, assuming PGSIZE is the size of each page
+    int free_pages = kfreepages();  // This function should return the number of free pages
+    return free_pages * PGSIZE;     // Return the free memory in bytes
+}