From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 28 Jan 2015 16:55:31 +0000 (+0100)
Subject: ARM: 8297/1: cache-l2x0: optimize aurora range operations
X-Git-Tag: fixes-v4.0-rc1~125^2~1^3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1d88967900b87f94435581dad4ae319686c6ce10;p=pandora-kernel.git

ARM: 8297/1: cache-l2x0: optimize aurora range operations

The aurora_inv_range(), aurora_clean_range() and aurora_flush_range()
functions are highly redundant, both in source and in object code, and
they are harder to understand than necessary.

By moving the range loop into the aurora_pa_range() function, they
become trivial wrappers, and the object code start looking like what
one would expect for an optimal implementation.

Further optimization may be possible by using the per-CPU "virtual"
registers to avoid the spinlocks in most cases.

 (on Armada 370 RD and Armada XP GP, boot tested, plus a little bit of
 DMA traffic by reading data from a SD card)

Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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