From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 09/17] ARM: add atag32_to_cpu() function
Date: Mon, 11 Feb 2013 19:30:59 +0000 [thread overview]
Message-ID: <20130211193059.GN17833@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <51194347.9090501@codethink.co.uk>
On Mon, Feb 11, 2013 at 07:15:19PM +0000, Ben Dooks wrote:
> It isn't defined, and I have failed to find any information on
> it online. I have no idea if the IXP devices ran their boot-loader
> in big-endian or little-endian format?
It will be native endian, because that's the format which we've supported
up to now.
>> 1. define all tags using a new __atagXX, etc types.
>> 2. always use atagXX_to_cpu() to read these.
>> 3. Implement:
>>
>> #if defined(CONFIG_ATAG_LE)
>> typedef __le32 __atag32;
>> ...
>> #define atag32_to_cpu(x) le32_to_cpu(x)
>> ...
>> #elif defined(CONFIG_ATAG_BE)
>> typedef __be32 __atag32;
>> ...
>> #define atag32_to_cpu(x) be32_to_cpu(x)
>> ...
>> #elif defined(CONFIG_ATAG_NE)
>> typedef __u32 __atag32;
>> ...
>> #define atag32_to_cpu(x) x
>> ...
>> #endif
>>
>> and select the appropriate definition. Obviously, this is a fundamental
>> configuration just like the overall BE/LE configuration of the kernel.
>
> Ok, should I sort out doing that for the next round of patches?
Yes please.
> Should the ATAG_xx configurations go into arch/arm/Kconfig or
> is there somewhere better for them to go?
arch/arm/Kconfig for the time being. I've debated about moving some
config options to arch/arm/boot/Kconfig
next prev parent reply other threads:[~2013-02-11 19:30 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-08 23:17 ARM big-endian on current kernels for linux-3.8 Ben Dooks
2013-02-08 23:17 ` [PATCH 01/17] ARM: add CPU_BE8_BOOT_LE configuration Ben Dooks
2013-02-09 4:10 ` Nicolas Pitre
2013-02-09 16:46 ` Ben Dooks
2013-02-08 23:17 ` [PATCH 02/17] ARM: set BE8 if LE in head code Ben Dooks
2013-02-09 3:33 ` Nicolas Pitre
2013-02-09 16:47 ` Ben Dooks
2013-02-09 21:38 ` Rob Herring
2013-02-09 21:56 ` Ben Dooks
2013-02-11 19:35 ` Ben Dooks
2013-02-08 23:17 ` [PATCH 03/17] ARM: fix ARCH_IXP4xx usage of ARCH_SUPPORTS_BIG_ENDIAN Ben Dooks
2013-02-08 23:17 ` [PATCH 04/17] ARM: Add ARCH_SUPPORTS_BIG_ENDIAN Ben Dooks
2013-02-09 11:55 ` Russell King - ARM Linux
2013-02-09 16:55 ` Ben Dooks
2013-02-08 23:17 ` [PATCH 05/17] ARM: fixup_pv_table bug when CPU_ENDIAN_BE8 Ben Dooks
2013-02-09 3:40 ` Nicolas Pitre
2013-02-11 19:11 ` Ben Dooks
2013-02-12 21:45 ` Nicolas Pitre
2013-02-08 23:17 ` [PATCH 06/17] ARM: fixup head for atag verification Ben Dooks
2013-02-09 3:51 ` Nicolas Pitre
2013-02-09 17:09 ` Ben Dooks
2013-02-08 23:17 ` [PATCH 07/17] ARM: twd: data endian fix Ben Dooks
2013-02-08 23:17 ` [PATCH 08/17] ARM: smp_scu: data endian fixes Ben Dooks
2013-02-08 23:17 ` [PATCH 09/17] ARM: add atag32_to_cpu() function Ben Dooks
2013-02-09 3:57 ` Nicolas Pitre
2013-02-09 12:03 ` Russell King - ARM Linux
2013-02-11 19:15 ` Ben Dooks
2013-02-11 19:30 ` Russell King - ARM Linux [this message]
2013-02-12 18:46 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-12 20:34 ` Russell King - ARM Linux
2013-02-08 23:17 ` [PATCH 10/17] ARM: update atag-to-fdt code to be endian agnostic Ben Dooks
2013-02-09 3:57 ` Nicolas Pitre
2013-02-09 12:05 ` Russell King - ARM Linux
2013-02-11 19:16 ` Ben Dooks
2013-02-12 21:53 ` Nicolas Pitre
2013-02-13 11:27 ` Ben Dooks
2013-02-14 4:43 ` Nicolas Pitre
2013-02-15 11:28 ` Ben Dooks
2013-02-08 23:17 ` [PATCH 11/17] ARM: fixup atags " Ben Dooks
2013-02-09 4:03 ` Nicolas Pitre
2013-02-09 12:06 ` Russell King - ARM Linux
2013-02-08 23:17 ` [PATCH 12/17] ARM: fix magic for bootloader in BE8 Ben Dooks
2013-02-09 4:06 ` Nicolas Pitre
2013-02-09 12:08 ` Russell King - ARM Linux
2013-02-12 18:50 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-12 18:54 ` Ben Dooks
2013-02-12 19:52 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-11 19:17 ` Ben Dooks
2013-02-12 21:57 ` Nicolas Pitre
2013-02-08 23:17 ` [PATCH 13/17] ARM: pl01x debug code endian fix Ben Dooks
2013-02-09 12:09 ` Russell King - ARM Linux
2013-02-11 19:19 ` Ben Dooks
2013-02-08 23:17 ` [PATCH 14/17] highbank: enable big-endian Ben Dooks
2013-02-09 21:33 ` Rob Herring
2013-02-09 22:00 ` Ben Dooks
2013-02-08 23:17 ` [PATCH 15/17] xgmac: fix printing of hardware version Ben Dooks
2013-02-09 12:10 ` Russell King - ARM Linux
2013-02-09 17:20 ` Ben Dooks
2013-02-09 21:35 ` Rob Herring
2013-02-08 23:17 ` [PATCH 16/17] xgmac: replace __raw with relaxed IO Ben Dooks
2013-02-09 20:59 ` Rob Herring
2013-02-09 22:03 ` Ben Dooks
2013-02-08 23:17 ` [PATCH 17/17] mvebu: support running big-endian Ben Dooks
2013-02-12 17:08 ` ARM big-endian on current kernels for linux-3.8 Thomas Petazzoni
2013-02-12 17:25 ` Ben Dooks
2013-02-12 18:49 ` Thomas Petazzoni
2013-02-12 18:54 ` Ben Dooks
2013-02-13 9:48 ` Thomas Petazzoni
2013-02-12 17:13 ` Russell King - ARM Linux
2013-02-12 17:33 ` Ben Dooks
2013-02-12 22:13 ` Nicolas Pitre
2013-02-13 11:00 ` Ben Dooks
2013-02-13 10:24 ` Matthieu CASTET
2013-02-13 11:18 ` Ben Dooks
2013-02-13 15:52 ` Catalin Marinas
2013-02-13 16:02 ` Ben Dooks
2013-02-13 16:03 ` Arnd Bergmann
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