From: Ben Pfaff <blp@cs.stanford.edu>
Date: Thu, 7 Oct 2004 00:35:18 +0000 (+0000)
Subject: Check that the serial rate is reasonable.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ac128198b7500ae73aaceba3bd2096add2960b20;p=pintos-anon

Check that the serial rate is reasonable.
---

diff --git a/src/devices/serial.c b/src/devices/serial.c
index 8dc7f18..099b228 100644
--- a/src/devices/serial.c
+++ b/src/devices/serial.c
@@ -131,6 +131,8 @@ set_serial (int bps)
   int baud_base = 1843200 / 16;         /* Base rate of 16550A. */
   uint16_t divisor = baud_base / bps;   /* Clock rate divisor. */
 
+  ASSERT (bps >= 300 && bps <= 115200);
+
   /* Enable DLAB. */
   outb (LCR_REG, LCR_N81 | LCR_DLAB);