LXR linux/arch/arm/include/asm/outercache.h

   1/*
   2 * arch/arm/include/asm/outercache.h
   3 *
   4 * Copyright (C) 2010 ARM Ltd.
   5 * Written by Catalin Marinas <catalin.marinas@arm.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19 */
  20
  21#ifndef __ASM_OUTERCACHE_H
  22#define __ASM_OUTERCACHE_H
  23
  24#include <linux/types.h>
  25
  26struct l2x0_regs;
  27
  28struct outer_cache_fns {
  29        void (*inv_range)(unsigned long, unsigned long);
  30        void (*clean_range)(unsigned long, unsigned long);
  31        void (*flush_range)(unsigned long, unsigned long);
  32        void (*flush_all)(void);
  33        void (*disable)(void);
  34#ifdef CONFIG_OUTER_CACHE_SYNC
  35        void (*sync)(void);
  36#endif
  37        void (*resume)(void);
  38
  39        /* This is an ARM L2C thing */
  40        void (*write_sec)(unsigned long, unsigned);
  41        void (*configure)(const struct l2x0_regs *);
  42};
  43
  44extern struct outer_cache_fns outer_cache;
  45
  46#ifdef CONFIG_OUTER_CACHE
  47/**
  48 * outer_inv_range - invalidate range of outer cache lines
  49 * @start: starting physical address, inclusive
  50 * @end: end physical address, exclusive
  51 */
  52static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
  53{
  54        if (outer_cache.inv_range)
  55                outer_cache.inv_range(start, end);
  56}
  57
  58/**
  59 * outer_clean_range - clean dirty outer cache lines
  60 * @start: starting physical address, inclusive
  61 * @end: end physical address, exclusive
  62 */
  63static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
  64{
  65        if (outer_cache.clean_range)
  66                outer_cache.clean_range(start, end);
  67}
  68
  69/**
  70 * outer_flush_range - clean and invalidate outer cache lines
  71 * @start: starting physical address, inclusive
  72 * @end: end physical address, exclusive
  73 */
  74static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
  75{
  76        if (outer_cache.flush_range)
  77                outer_cache.flush_range(start, end);
  78}
  79
  80/**
  81 * outer_flush_all - clean and invalidate all cache lines in the outer cache
  82 *
  83 * Note: depending on implementation, this may not be atomic - it must
  84 * only be called with interrupts disabled and no other active outer
  85 * cache masters.
  86 *
  87 * It is intended that this function is only used by implementations
  88 * needing to override the outer_cache.disable() method due to security.
  89 * (Some implementations perform this as a clean followed by an invalidate.)
  90 */
  91static inline void outer_flush_all(void)
  92{
  93        if (outer_cache.flush_all)
  94                outer_cache.flush_all();
  95}
  96
  97/**
  98 * outer_disable - clean, invalidate and disable the outer cache
  99 *
 100 * Disable the outer cache, ensuring that any data contained in the outer
 101 * cache is pushed out to lower levels of system memory.  The note and
 102 * conditions above concerning outer_flush_all() applies here.
 103 */
 104extern void outer_disable(void);
 105
 106/**
 107 * outer_resume - restore the cache configuration and re-enable outer cache
 108 *
 109 * Restore any configuration that the cache had when previously enabled,
 110 * and re-enable the outer cache.
 111 */
 112static inline void outer_resume(void)
 113{
 114        if (outer_cache.resume)
 115                outer_cache.resume();
 116}
 117
 118#else
 119
 120static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
 121{ }
 122static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
 123{ }
 124static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
 125{ }
 126static inline void outer_flush_all(void) { }
 127static inline void outer_disable(void) { }
 128static inline void outer_resume(void) { }
 129
 130#endif
 131
 132#endif  /* __ASM_OUTERCACHE_H */
 133