From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Odd Lindahl" <odd.lindahl@mail.com>
To: gdb@sources.redhat.com
Subject: assembler version of "set $cpsr = 0xd3"
Date: Thu, 14 Jun 2001 02:07:00 -0000
Message-id: <20010614090729.13656.qmail@mail.com>
X-SW-Source: 2001-06/msg00117.html

Hi all,

I have writen a program to my AT91EB40 boards flash at 0x10100000
and I want to execute it after reset by putting the switch, SW1, in the
UPPER MEM position.

The program doesn't work correctly though :-(

But if I boot in Angel mode and issue the gdb commands:

set rdiromatzero 1
set remotebaud 9600
target rdi com1
set $cpsr = 0xd3
jump *0x01010000
( or either of jump *0x01000000 and jump *0x01010000 with the switch in
UPPER MEM position)

it starts up fine!!

But if I skipp the "set $cpsr = 0xd3" command it wont run correctly.

So what exactly does the "set $cpsr = 0xd3" command do and
how do I replace the mode switch in software that I can flash.

I have tried with the instruction:
swi
as the very first instruction which puts my CPU in supervisor mode and
which I have made sure will return to the address following the swi instruction.
But this didn't do the trick.

Kind Regards
Odd

-- 

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