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/*
* Copyright 2010 Tilera Corporation. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for
* more details.
*/
#ifndef _ASM_TILE_CACHE_H
#define _ASM_TILE_CACHE_H
#include <arch/chip.h>
/* bytes per L1 data cache line */
#define L1_CACHE_SHIFT CHIP_L1D_LOG_LINE_SIZE()
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
/* bytes per L2 cache line */
#define L2_CACHE_SHIFT CHIP_L2_LOG_LINE_SIZE()
#define L2_CACHE_BYTES (1 << L2_CACHE_SHIFT)
#define L2_CACHE_ALIGN(x) (((x)+(L2_CACHE_BYTES-1)) & -L2_CACHE_BYTES)
/*
* TILE-Gx is fully coherents so we don't need to define
* ARCH_KMALLOC_MINALIGN.
*/
#ifndef __tilegx__
#define ARCH_KMALLOC_MINALIGN L2_CACHE_BYTES
#endif
/* use the cache line size for the L2, which is where it counts */
#define SMP_CACHE_BYTES_SHIFT L2_CACHE_SHIFT
#define SMP_CACHE_BYTES L2_CACHE_BYTES
#define INTERNODE_CACHE_SHIFT L2_CACHE_SHIFT
#define INTERNODE_CACHE_BYTES L2_CACHE_BYTES
/* Group together read-mostly things to avoid cache false sharing */
#define __read_mostly __attribute__((__section__(".data.read_mostly")))
/*
* Attribute for data that is kept read/write coherent until the end of
* initialization, then bumped to read/only incoherent for performance.
*/
#define __write_once __attribute__((__section__(".w1data")))
#endif /* _ASM_TILE_CACHE_H */
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