From 50c363d07e2a72b73bacde9136ab9de9616f7830 Mon Sep 17 00:00:00 2001
From: henryk <henryk@6dc7ffe9-61d6-0310-9af1-9938baff3ed1>
Date: Wed, 21 Nov 2007 05:40:46 +0000
Subject: Add tragically failed (and commented out) attempt to remap ram to
 addr 0

git-svn-id: https://svn.openpcd.org:2342/trunk@341 6dc7ffe9-61d6-0310-9af1-9938baff3ed1
---
 openpicc/os/boot/boot.s | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'openpicc/os')

diff --git a/openpicc/os/boot/boot.s b/openpicc/os/boot/boot.s
index cbd9be7..f75bed1 100644
--- a/openpicc/os/boot/boot.s
+++ b/openpicc/os/boot/boot.s
@@ -40,6 +40,7 @@
     .equ  F_BIT, 0x40               /* when F bit is set, FIQ is disabled */
 
 .equ AT91C_BASE_AIC,  (0xFFFFF000)
+.equ AT91C_BASE_MC,   (0xFFFFFF00)
 .equ AT91C_BASE_PIOA, 0xFFFFF400
 .equ AT91C_BASE_TC0,  0xFFFA0000
 .equ AT91C_TC_SWTRG,  (1 << 2)
@@ -53,6 +54,7 @@
 .equ AIC_EOICR,       (304)
 /*.equ PIO_LED1,        (1 << 25)*/
 .equ PIO_LED1,        (1 << 12)
+.equ MC_RCR,          0xFFFFFF00
 
 start:
 _start:
@@ -126,12 +128,26 @@ _mainCRTStartup:
 
 .end_set_loop:
 
+	/* Load absolute address and jump there to get from pc=0x0000... to pc=0x0010... */
+    ldr lr, _here
+    bx lr
+   
+.here:
+	/* Perform remap FIXME doesn't work (not even the absolute jump above seems to help)*/
+	/*ldr     r0, =AT91C_BASE_MC
+	mov     r1, #0x01
+	str     r1, [r0, #0]*/
+	
+	/* call main */
 	mov		r0, #0          /* no arguments  */
 	mov		r1, #0          /* no argv either */
 
     ldr lr, =main	
 	bx	lr
 
+_here:
+	.word .here 
+
 endless_loop:
 	b               endless_loop
 
-- 
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