From 4edc0cb2313541e74026c25b52a8f9685d953a14 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji3.141@gmail.com>
Date: Sun, 22 Dec 2019 09:06:25 -0500
Subject: report number of free pages

---
 src/kernel/main.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/kernel/main.c')

diff --git a/src/kernel/main.c b/src/kernel/main.c
index d5f463c..54b0a83 100644
--- a/src/kernel/main.c
+++ b/src/kernel/main.c
@@ -21,6 +21,7 @@ OF THIS SOFTWARE.
 #include "files.h"
 #include "mem.h"
 #include "proc.h"
+#include "misc.h"
 
 void main(void) {
   *(uint32_t *)0x0000050c = (uint32_t)allocate_pages(16 * sizeof(struct file_handle_info), 2);
@@ -31,6 +32,21 @@ void main(void) {
   for (struct proc_info *i = FILE_HANDLES, *l = FILE_HANDLES + 65536; i < l; ++i)
     i->memory_start = 0;
 
+  uint16_t pages_free = 0, pages_total = 0;
+  for (uint16_t *i = MMAP; i < MMAP + 0x1000; ++i)
+    switch (*i) {
+    case 1:
+      continue;
+    case 0:
+      ++pages_free;
+    default:
+      ++pages_total;
+    }
+  put_16(pages_free);
+  put_sz(" of ");
+  put_16(pages_total);
+  put_sz(" pages free.\n");
+
   put_sz("Welcome to Portland version 0.0.8!\n");
   while (1)
     put_sz("|\b/\b-\b\\\b");
-- 
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