From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] Clean up ARM compressed loader
Date: Wed, 24 Feb 2010 22:34:18 +0000 [thread overview]
Message-ID: <20100224223418.GB25587@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1266978217-7023-1-git-send-email-hector@marcansoft.com>
On Wed, Feb 24, 2010 at 03:23:37AM +0100, Hector Martin wrote:
> Instead, clean up the stub loader and unify it. The loader is now
> exactly the same regardless of whether you've enabled CONFIG_ZBOOT_ROM
> or not, and runs from RAM in PIC mode. CONFIG_ZBOOT_ROM simply enables
> an extra section of stub code that lets the zImage boot from ROM by
> copying itself to RAM first.
Unacceptable.
The point of putting the decompressor in ROM is to save the time spent
copying it to RAM first. Boot loaders are already perfectly capable
of copying the image into RAM and calling it there.
Getting the decompressor to do that step first just moves the copy from
the boot loader into the decompressor. It doesn't eliminate it, which
is what ROM-based decompression is all about.
Basically, this patch makes the feature entirely pointless.
next prev parent reply other threads:[~2010-02-24 22:34 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-24 2:23 [PATCH] Clean up ARM compressed loader Hector Martin
2010-02-24 8:51 ` Uwe Kleine-König
2010-02-24 9:28 ` Hector Martin
2010-02-24 22:34 ` Russell King - ARM Linux [this message]
2010-02-24 23:34 ` Nicolas Pitre
2010-02-24 23:42 ` Russell King - ARM Linux
2010-02-24 23:57 ` Hector Martin
2010-02-25 0:01 ` Russell King - ARM Linux
2010-02-25 0:30 ` Hector Martin
2010-02-25 4:28 ` Nicolas Pitre
2010-02-25 4:33 ` Nicolas Pitre
2010-02-25 9:38 ` Russell King - ARM Linux
2010-02-25 10:05 ` Hector Martin
2010-02-25 18:35 ` Nicolas Pitre
2010-02-25 19:21 ` Hector Martin
2010-02-25 19:40 ` Nicolas Pitre
2010-02-25 19:56 ` Hector Martin
2010-02-25 20:29 ` Nicolas Pitre
2010-02-25 21:05 ` Russell King - ARM Linux
2010-02-25 21:25 ` Nicolas Pitre
2010-02-25 20:30 ` Russell King - ARM Linux
2010-02-25 12:24 ` Russell King - ARM Linux
2010-02-25 19:24 ` Nicolas Pitre
2010-02-25 19:34 ` Russell King - ARM Linux
2010-02-25 23:48 ` Russell King - ARM Linux
2010-02-25 23:55 ` Russell King - ARM Linux
2010-02-25 9:51 ` Hector Martin
2010-02-25 18:30 ` Nicolas Pitre
2010-02-25 8:23 ` Russell King - ARM Linux
2010-02-25 4:06 ` Nicolas Pitre
-- strict thread matches above, loose matches on Subject: below --
2010-02-23 13:57 hector at marcansoft.com
2010-02-23 14:07 ` Russell King - ARM Linux
2010-02-24 8:42 ` Uwe Kleine-König
2010-02-24 9:27 ` Hector Martin
2010-02-24 11:03 ` Russell King - ARM Linux
2010-02-24 15:20 ` Hector Martin
2010-02-24 15:30 ` Uwe Kleine-König
2010-02-24 22:09 ` Hector Martin
2010-02-24 22:30 ` Russell King - ARM Linux
2010-02-25 0:01 ` Hector Martin
2010-02-24 16:29 ` Russell King - ARM Linux
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