cache.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/* $Id: cache.h,v 1.6 2004/03/11 18:08:05 lethal Exp $
 3 *
 4 * include/asm-sh/cache.h
 5 *
 6 * Copyright 1999 (C) Niibe Yutaka
 7 * Copyright 2002, 2003 (C) Paul Mundt
 8 */
 9#ifndef __ASM_SH_CACHE_H
10#define __ASM_SH_CACHE_H
11
12#include <linux/init.h>
13#include <cpu/cache.h>
14
15#define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)
16
17/*
18 * Some drivers need to perform DMA into kmalloc'ed buffers
19 * and so we have to increase the kmalloc minalign for this.
20 */
21#define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
22
23#define __read_mostly __section(".data..read_mostly")
24
25#ifndef __ASSEMBLER__
26struct cache_info {
27	unsigned int ways;		/* Number of cache ways */
28	unsigned int sets;		/* Number of cache sets */
29	unsigned int linesz;		/* Cache line size (bytes) */
30
31	unsigned int way_size;		/* sets * line size */
32
33	/*
34	 * way_incr is the address offset for accessing the next way
35	 * in memory mapped cache array ops.
36	 */
37	unsigned int way_incr;
38	unsigned int entry_shift;
39	unsigned int entry_mask;
40
41	/*
42	 * Compute a mask which selects the address bits which overlap between
43	 * 1. those used to select the cache set during indexing
44	 * 2. those in the physical page number.
45	 */
46	unsigned int alias_mask;
47	unsigned int n_aliases;		/* Number of aliases */
48
49	unsigned long flags;
50};
51#endif /* __ASSEMBLER__ */
52#endif /* __ASM_SH_CACHE_H */