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parisc: Change L1_CACHE_BYTES to 16

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Change L1_CACHE_BYTES to 16 bytes.
Tested for 16 days on rp3440.

Additional remarks from Helge Deller:
Saves ~17 kb of kernel code/data and gives a slight performance improvement in
various test cases.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
John David Anglin 2015-10-14 20:32:11 -04:00 committed by Helge Deller
parent c59f419bdd
commit a01fece2e4
1 changed files with 5 additions and 13 deletions
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18
arch/parisc/include/asm/cache.h
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@ -7,20 +7,12 @@
/*
* PA 2.0 processors have 64-byte cachelines; PA 1.1 processors have
* 32-byte cachelines. The default configuration is not for SMP anyway,
* so if you're building for SMP, you should select the appropriate
* processor type. There is a potential livelock danger when running
* a machine with this value set too small, but it's more probable you'll
* just ruin performance.
* PA 2.0 processors have 64 and 128-byte L2 cachelines; PA 1.1 processors
* have 32-byte cachelines. The L1 length appears to be 16 bytes but this
* is not clearly documented.
*/
#ifdef CONFIG_PA20
#define L1_CACHE_BYTES 64
#define L1_CACHE_SHIFT 6
#else
#define L1_CACHE_BYTES 32
#define L1_CACHE_SHIFT 5
#endif
#define L1_CACHE_BYTES 16
#define L1_CACHE_SHIFT 4
#ifndef __ASSEMBLY__