linux-kernel - Re: [PATCH 1/6 v8] ARM: Add basic architecture support for VIA/WonderMedia 85xx SoC's

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Date:	Wed, 6 Jul 2011 13:34:17 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Alexey Charkov <alchark@...il.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	vt8500-wm8505-linux-kernel@...glegroups.com,
	Eric Miao <eric.y.miao@...il.com>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Albin Tonnerre <albin.tonnerre@...e-electrons.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6 v8] ARM: Add basic architecture support for
	VIA/WonderMedia 85xx SoC's

On Sun, Dec 19, 2010 at 08:40:17PM +0300, Alexey Charkov wrote:
> +static struct map_desc vt8500_io_desc[] __initdata = {
> +	/* SoC MMIO registers, to be filled in later */
> +	[0] = {
> +		.type		= MT_DEVICE
> +	},
> +	/* PCI I/O space, numbers tied to those in <mach/io.h> */
> +	[1] = {
> +		.virtual	= 0xf0000000,
> +		.pfn		= __phys_to_pfn(0xc0000000),
> +		.length		= SZ_64K,
> +		.type		= MT_DEVICE
> +	},
> +};
...
> diff --git a/arch/arm/mach-vt8500/include/mach/io.h b/arch/arm/mach-vt8500/include/mach/io.h
> new file mode 100644
> index 0000000..8dd55c8
> --- /dev/null
> +++ b/arch/arm/mach-vt8500/include/mach/io.h
> +#ifndef __ASM_ARM_ARCH_IO_H
> +#define __ASM_ARM_ARCH_IO_H
> +
> +#define IO_SPACE_LIMIT 0xffff
> +
> +#define __io(a)		((void __iomem *)((a) + 0xf0000000))
> +#define __mem_pci(a)	(a)

Can you explain why you seem to have PCI IO space, yet don't have CONFIG_PCI
selected?  Do you have any drivers which use this space without CONFIG_PCI=y?

Thanks.
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