ARM: l2c: provide generic hook to intercept writes to secure registers

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When Linux is running in the non-secure world, any write to a secure
L2C register will generate an abort.  Platforms normally have to call
firmware to work around this.  Provide a hook for them to intercept
any L2C secure register write.

l2c_write_sec() avoids writes to secure registers which are already set
to the appropriate value, thus avoiding the overhead of needlessly
calling into the secure monitor.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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This commit is contained in:

Russell King 2014-03-16 17:38:08 +00:00

parent c0fe18ba30

commit 8abd259f65

2 changed files with 34 additions and 13 deletions

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5

arch/arm/include/asm/outercache.h

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42

arch/arm/mm/cache-l2x0.c

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