linux-kernel - Re: [RFC][Patch] IBM Real-Time "SMI Free" mode driver -v4

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Message-Id: <201009242240.38987.arnd@arndb.de>
Date:	Fri, 24 Sep 2010 22:40:38 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Vernon Mauery <vernux@...ibm.com>
Cc:	Randy Dunlap <rdunlap@...otime.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Keith Mannthey <kmannth@...ibm.com>
Subject: Re: [RFC][Patch] IBM Real-Time "SMI Free" mode driver -v4

On Friday 24 September 2010 20:23:27 Vernon Mauery wrote:
> No, inb/outb have address as as unsigned long, which would explain why 
> 0x40000 works with PIO.  When doing inb/outb via the ioread/iowrite 
> macros, the port value is the address (minus the offset) masked off to 
> PIO_MASK, which is 16 bits on x86.

What I meant is that the inb/outb *instructions* only take a 16 bit
argument, not the kernel functions. You should really try to find
out what is going on there.

	Arnd
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