From: Clemens Koller <clemens.koller@anagramm•de>
To: Gerhard Jaeger <g.jaeger@sysgo•com>
Cc: Eric Kampman <erickampman@yahoo•com>, linuxppc-embedded@ozlabs•org
Subject: Re: MPC8555CDS & CCSRBAR
Date: Tue, 09 Aug 2005 17:53:42 +0200 [thread overview]
Message-ID: <42F8D186.1030209@anagramm.de> (raw)
In-Reply-To: <200508091615.53736.g.jaeger@sysgo.com>
Hi!
You might want to try that:
#include <asm/mpc85xx.h>
#include <immap_85xx.h> /* see mail archives for complete mpc8540 version */
...
void foo(void)
{
volatile ccsr_t *immap;
phys_addr_t ccsrbar;
ccsrbar=get_ccsrbar();
immap=ioremap(ccsrbar,sizeof(ccsr_t)); /* is ioremap_nochache() the same on mpc85xx? */
if (!immap) {
printk(KERN_ALERT "Failed to ioremap CCSRBAR!\n");
err = -EIO;
goto out;
}
/* examples */
printk(KERN_INFO "CCSRBAR addr %.8lx\n",ccsrbar);
printk(KERN_INFO "IMMAP addr %p\n",immap);
printk(KERN_INFO "BR0 %.8x\n",immap->im_lbc.br0);
printk(KERN_INFO "OR0 %.8x\n",immap->im_lbc.or0);
/* unmap the ccsr*/
iounmap(immap);
out:
}
I hope that's all current code.
Comments are welcome.
Greets,
Clemens Koller
_______________________________
R&D Imaging Devices
Anagramm GmbH
Rupert-Mayer-Str. 45/1
81379 Muenchen
Germany
http://www.anagramm.de
Phone: +49-89-741518-50
Fax: +49-89-741518-19
Gerhard Jaeger wrote:
> On Tuesday 09 August 2005 16:04, Eric Kampman wrote:
>
>>Trying to port an SEC driver to Linux/PPC8555. Reading
>>the default CCSRBAR @ 0xFF700000 I read 0xFFFFFFFF
>>which is wrong. Looking at Metrowerks init files and
>>uboot code (1.1.2) I see it's likely been moved to
>>0xE0000000, but I get a seg fault when I try to read
>>there.
>>
>>So, what am I doing wrong, and even better, how do I
>>at runtime find out where CCSRBAR is? Thanks in
>>advance, and please forgive the likely ignorance,
>>
>>Eric
>>
>
>
> use the get_ccsrbar() function to get the address, then ioremap()
> will be your friend ;)
>
> HTH
> Gerhard
next prev parent reply other threads:[~2005-08-09 15:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-09 14:04 MPC8555CDS & CCSRBAR Eric Kampman
2005-08-09 14:15 ` Gerhard Jaeger
2005-08-09 14:33 ` Kumar Gala
2005-08-09 15:53 ` Clemens Koller [this message]
2005-08-09 16:04 ` Kim Phillips
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=42F8D186.1030209@anagramm.de \
--to=clemens.koller@anagramm$(echo .)de \
--cc=erickampman@yahoo$(echo .)com \
--cc=g.jaeger@sysgo$(echo .)com \
--cc=linuxppc-embedded@ozlabs$(echo .)org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox