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From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: "Joel Stanley" <joel@jms.id.au>,
	"Marek Szyprowski" <m.szyprowski@samsung.com>,
	"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
	"Linux Samsung SOC" <linux-samsung-soc@vger.kernel.org>,
	"Krzysztof Kozlowski" <krzk@kernel.org>,
	"Linus Walleij" <linus.walleij@linaro.org>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Nicolas Pitre" <nico@fluxnic.net>,
	"Cédric Le Goater" <clg@kaod.org>
Subject: Re: [PATCH v2 2/2] ARM: move device tree mapping out of linear region
Date: Wed, 28 Oct 2020 13:00:50 +0000	[thread overview]
Message-ID: <20201028130050.GL1551@shell.armlinux.org.uk> (raw)
In-Reply-To: <CAMj1kXH90MzCUJ_DHZ_2=JcWBX=Qf1PT-A9PX9EeBTVx22EkaQ@mail.gmail.com>

On Wed, Oct 28, 2020 at 01:52:48PM +0100, Ard Biesheuvel wrote:
> Does this help?
> 
> diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
> index bb79e52aeb90..4f355bda872a 100644
> --- a/arch/arm/include/asm/memory.h
> +++ b/arch/arm/include/asm/memory.h
> @@ -68,8 +68,8 @@
>  #define XIP_VIRT_ADDR(physaddr)  (MODULES_VADDR + ((physaddr) & 0x000fffff))
> 
>  #define FDT_FIXED_BASE         UL(0xff800000)
> -#define FDT_FIXED_SIZE         (2 * PMD_SIZE)
> -#define FDT_VIRT_ADDR(physaddr)        ((void *)(FDT_FIXED_BASE |
> (physaddr) % PMD_SIZE))
> +#define FDT_FIXED_SIZE         (2 * SECTION_SIZE)
> +#define FDT_VIRT_ADDR(physaddr)        ((void *)(FDT_FIXED_BASE |
> (physaddr) % SECTION_SIZE))

Is this correct? If the FDT fixed size is 2x, why does FDT_VIRT_ADDR()
only work for half of it?

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

WARNING: multiple messages have this Message-ID (diff)
From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: "Linux Samsung SOC" <linux-samsung-soc@vger.kernel.org>,
	"Nicolas Pitre" <nico@fluxnic.net>,
	"Linus Walleij" <linus.walleij@linaro.org>,
	"Krzysztof Kozlowski" <krzk@kernel.org>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Cédric Le Goater" <clg@kaod.org>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Joel Stanley" <joel@jms.id.au>,
	"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
	"Marek Szyprowski" <m.szyprowski@samsung.com>
Subject: Re: [PATCH v2 2/2] ARM: move device tree mapping out of linear region
Date: Wed, 28 Oct 2020 13:00:50 +0000	[thread overview]
Message-ID: <20201028130050.GL1551@shell.armlinux.org.uk> (raw)
In-Reply-To: <CAMj1kXH90MzCUJ_DHZ_2=JcWBX=Qf1PT-A9PX9EeBTVx22EkaQ@mail.gmail.com>

On Wed, Oct 28, 2020 at 01:52:48PM +0100, Ard Biesheuvel wrote:
> Does this help?
> 
> diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
> index bb79e52aeb90..4f355bda872a 100644
> --- a/arch/arm/include/asm/memory.h
> +++ b/arch/arm/include/asm/memory.h
> @@ -68,8 +68,8 @@
>  #define XIP_VIRT_ADDR(physaddr)  (MODULES_VADDR + ((physaddr) & 0x000fffff))
> 
>  #define FDT_FIXED_BASE         UL(0xff800000)
> -#define FDT_FIXED_SIZE         (2 * PMD_SIZE)
> -#define FDT_VIRT_ADDR(physaddr)        ((void *)(FDT_FIXED_BASE |
> (physaddr) % PMD_SIZE))
> +#define FDT_FIXED_SIZE         (2 * SECTION_SIZE)
> +#define FDT_VIRT_ADDR(physaddr)        ((void *)(FDT_FIXED_BASE |
> (physaddr) % SECTION_SIZE))

Is this correct? If the FDT fixed size is 2x, why does FDT_VIRT_ADDR()
only work for half of it?

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2020-10-28 22:23 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-07  8:39 [PATCH v2 0/2] ARM: move FDT mapping out of linear region Ard Biesheuvel
2020-10-07  8:39 ` [PATCH v2 1/2] ARM: centralize phys-to-virt conversion of DT/ATAGS address Ard Biesheuvel
2020-10-07 15:28   ` Nicolas Pitre
2020-10-07  8:39 ` [PATCH v2 2/2] ARM: move device tree mapping out of linear region Ard Biesheuvel
2020-10-07 15:28   ` Nicolas Pitre
2020-10-07 15:32     ` Ard Biesheuvel
2020-10-07 16:38       ` Nicolas Pitre
2020-10-07 16:40       ` Nicolas Pitre
2020-10-07 21:32     ` Russell King - ARM Linux admin
2020-10-07 22:05       ` Nicolas Pitre
     [not found]   ` <CGME20201028091912eucas1p13fb9cd947faa6bfd79199ea79648b6af@eucas1p1.samsung.com>
2020-10-28  9:19     ` Marek Szyprowski
2020-10-28  9:19       ` Marek Szyprowski
2020-10-28  9:22       ` Ard Biesheuvel
2020-10-28  9:22         ` Ard Biesheuvel
2020-10-28  9:24         ` Ard Biesheuvel
2020-10-28  9:24           ` Ard Biesheuvel
2020-10-28  9:43           ` Marek Szyprowski
2020-10-28  9:43             ` Marek Szyprowski
2020-10-28 12:05       ` Joel Stanley
2020-10-28 12:05         ` Joel Stanley
2020-10-28 12:52         ` Ard Biesheuvel
2020-10-28 12:52           ` Ard Biesheuvel
2020-10-28 12:59           ` Joel Stanley
2020-10-28 12:59             ` Joel Stanley
2020-10-28 13:00             ` Ard Biesheuvel
2020-10-28 13:00               ` Ard Biesheuvel
2020-10-28 13:06               ` Joel Stanley
2020-10-28 13:06                 ` Joel Stanley
2020-10-28 13:00           ` Russell King - ARM Linux admin [this message]
2020-10-28 13:00             ` Russell King - ARM Linux admin
2020-10-28 13:04             ` Ard Biesheuvel
2020-10-28 13:04               ` Ard Biesheuvel
2020-10-28 13:09               ` Russell King - ARM Linux admin
2020-10-28 13:09                 ` Russell King - ARM Linux admin
2020-10-28 13:16           ` Marek Szyprowski
2020-10-28 13:16             ` Marek Szyprowski
2020-10-11 16:39 ` [PATCH v2 0/2] ARM: move FDT " Ard Biesheuvel

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