From f1530d8a8267f6ff6686623f12da3c3cf33b9888 Mon Sep 17 00:00:00 2001
From: Linus Nielsen Feltzing <linus@haxx.se>
Date: Fri, 4 Feb 2005 18:24:58 +0000
Subject: Boot loader safety measures

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5791 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/crt0.S | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'firmware/crt0.S')

diff --git a/firmware/crt0.S b/firmware/crt0.S
index 1f385d4ce5..339366582f 100644
--- a/firmware/crt0.S
+++ b/firmware/crt0.S
@@ -173,6 +173,21 @@ irq_handler:
         
 
 #ifdef BOOTLOADER
+        /* The cookie is not reset. This must mean that the boot loader
+           has crashed. Let's start the original firmware immediately. */
+        lea     0x10017ffc,%a2
+        move.l  (%a2),%d0
+        move.l  #0xc0015a17,%d1
+        cmp.l   %d0,%d1
+        bne     .nocookie
+        /* Clear the cookie again */
+        move.l  #0,(%a2)
+        jmp     8
+        
+.nocookie:
+        /* Set the cookie */
+        move.l  %d1,(%a2)
+        
         /* Set up the DRAM controller. The refresh is based on the 11.2896MHz
            clock (5.6448MHz bus frequency). We haven't yet started the PLL */
         move.l #0x80050000,%d0
-- 
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