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From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Denis OSTERLAND <denis.osterland@diehl.com>,
	"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>
Cc: "barebox@lists.infradead.org" <barebox@lists.infradead.org>
Subject: Re: [PATCH v2] hab: Print events on info command.
Date: Mon, 15 Oct 2018 10:46:16 +0200	[thread overview]
Message-ID: <84bd5f0d-9fcd-f454-183c-2166e5707a87@pengutronix.de> (raw)
In-Reply-To: <1539592904.5886.15.camel@diehl.com>


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On 10/15/2018 10:41 AM, Denis OSTERLAND wrote:
>> The faulting zero page problem doesn't occur on mx25 and mx28 as the HAB
>> ROM doesn't live at 0x0:
>>
>> #define HABV4_RVT_IMX28 0xffff8af8
>>
>> int imx25_hab_get_status(void)
>> {
>>         return imx_habv3_get_status(readl(IOMEM(0x780018d4)));
>> }
>>  
>> Marc
>>
> 
> Thanks for the info.
> This becomes a problem when MMU is enabled again.

I think we have a 1-to-1 mapping by default, modulo the zero page.

> I think this will require explicit mapping.
> I am not sure if it is possible to access the ABI through mapped addresses.

Probably not, I assume the code is not position independent.

> Is it possible to force mapping at exact this addresses?

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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      reply	other threads:[~2018-10-15  8:46 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-04  7:05 [PATCH] " Denis OSTERLAND
2018-10-04 21:14 ` Andrey Smirnov
2018-10-05  6:58 ` [PATCH v2] " Denis OSTERLAND
2018-10-10  7:51   ` Sascha Hauer
2018-10-10  9:29     ` Denis OSTERLAND
2018-10-12  6:23     ` Marc Kleine-Budde
2018-10-15  8:41       ` Denis OSTERLAND
2018-10-15  8:46         ` Marc Kleine-Budde [this message]

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