From 2d461156bd6173b1062642f1c196df42bfdb6ff8 Mon Sep 17 00:00:00 2001
From: Linus Nielsen Feltzing <linus@haxx.se>
Date: Thu, 1 Aug 2002 08:12:48 +0000
Subject: Copies code to internal ram at startup

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1498 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/crt0.S | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

(limited to 'firmware')

diff --git a/firmware/crt0.S b/firmware/crt0.S
index 78b26b77ea..99aab83867 100644
--- a/firmware/crt0.S
+++ b/firmware/crt0.S
@@ -95,8 +95,21 @@ start:
 start_l:
 	mov.l	r2,@r0
 	add	#4,r0
-	cmp/ge	r0,r1
-	bt	start_l
+	cmp/ge	r1,r0
+	bf	start_l
+	nop
+
+	/* copy the .iram section */
+	mov.l	iramcopy_k,r0
+	mov.l	iram_k,r1
+	mov.l	iramend_k,r2
+copy_l:
+	mov.l	@r0,r3
+	mov.l	r3,@r1
+	add	#4,r0
+	add	#4,r1
+	cmp/ge	r2,r1
+	bf	copy_l
 	nop
 
 	/* Munge the main thread stack */
@@ -106,8 +119,8 @@ start_l:
 munge_loop:
 	mov.l	r0,@r1
 	add	#4,r1
-	cmp/ge	r1,r2
-	bt	munge_loop
+	cmp/ge	r2,r1
+	bf	munge_loop
 	nop
 
 	mov     #0,r0
@@ -131,6 +144,12 @@ edata_k:
 	.long	_edata
 end_k:
 	.long	_end
+iramcopy_k:
+	.long	_iramcopy
+iram_k:
+	.long	_iramstart
+iramend_k:
+	.long	_iramend
 main_k:
 	.long	_main
 vbr_k:
-- 
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