linux-kernel - Re: [PATCH v9] arm64: Add architectural support for PCIe

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Message-ID: <20140818142648.GQ20043@localhost>
Date:	Mon, 18 Aug 2014 15:26:48 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Liviu Dudau <Liviu.Dudau@....com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Will Deacon <Will.Deacon@....com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Arnd Bergmann <arnd@...db.de>,
	Russell King <linux@....linux.org.uk>,
	Tanmay Inamdar <tinamdar@....com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Sinan Kaya <okaya@...eaurora.org>,
	Jingoo Han <jg1.han@...sung.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Suravee Suthikulanit <suravee.suthikulpanit@....com>,
	linux-pci <linux-pci@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v9] arm64: Add architectural support for PCIe

On Tue, Aug 12, 2014 at 05:26:00PM +0100, Liviu Dudau wrote:
> diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
> index e0ecdcf..dc34039 100644
> --- a/arch/arm64/include/asm/io.h
> +++ b/arch/arm64/include/asm/io.h
> @@ -121,7 +121,8 @@ static inline u64 __raw_readq(const volatile void __iomem *addr)
>  /*
>   *  I/O port access primitives.
>   */
> -#define IO_SPACE_LIMIT		0xffff
> +#define arch_has_dev_port()	(1)
> +#define IO_SPACE_LIMIT		0x1ffffff

Minor thing, (SZ_32M - 1) may be easier in case we ever change this.

>  #define PCI_IOBASE		((void __iomem *)(MODULES_VADDR - SZ_32M))

-- 
Catalin
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