cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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bcache.h (2086B)

      1/*
      2 * This file is subject to the terms and conditions of the GNU General Public
      3 * License.  See the file "COPYING" in the main directory of this archive
      4 * for more details.
      5 *
      6 * Copyright (c) 1997, 1999 by Ralf Baechle
      7 * Copyright (c) 1999 Silicon Graphics, Inc.
      8 */
      9#ifndef _ASM_BCACHE_H
     10#define _ASM_BCACHE_H
     11
     12#include <linux/types.h>
     13
     14/* Some R4000 / R4400 / R4600 / R5000 machines may have a non-dma-coherent,
     15   chipset implemented caches.	On machines with other CPUs the CPU does the
     16   cache thing itself. */
     17struct bcache_ops {
     18	void (*bc_enable)(void);
     19	void (*bc_disable)(void);
     20	void (*bc_wback_inv)(unsigned long page, unsigned long size);
     21	void (*bc_inv)(unsigned long page, unsigned long size);
     22	void (*bc_prefetch_enable)(void);
     23	void (*bc_prefetch_disable)(void);
     24	bool (*bc_prefetch_is_enabled)(void);
     25};
     26
     27extern void indy_sc_init(void);
     28
     29#ifdef CONFIG_BOARD_SCACHE
     30
     31extern struct bcache_ops *bcops;
     32
     33static inline void bc_enable(void)
     34{
     35	bcops->bc_enable();
     36}
     37
     38static inline void bc_disable(void)
     39{
     40	bcops->bc_disable();
     41}
     42
     43static inline void bc_wback_inv(unsigned long page, unsigned long size)
     44{
     45	bcops->bc_wback_inv(page, size);
     46}
     47
     48static inline void bc_inv(unsigned long page, unsigned long size)
     49{
     50	bcops->bc_inv(page, size);
     51}
     52
     53static inline void bc_prefetch_enable(void)
     54{
     55	if (bcops->bc_prefetch_enable)
     56		bcops->bc_prefetch_enable();
     57}
     58
     59static inline void bc_prefetch_disable(void)
     60{
     61	if (bcops->bc_prefetch_disable)
     62		bcops->bc_prefetch_disable();
     63}
     64
     65static inline bool bc_prefetch_is_enabled(void)
     66{
     67	if (bcops->bc_prefetch_is_enabled)
     68		return bcops->bc_prefetch_is_enabled();
     69
     70	return false;
     71}
     72
     73#else /* !defined(CONFIG_BOARD_SCACHE) */
     74
     75/* Not R4000 / R4400 / R4600 / R5000.  */
     76
     77#define bc_enable() do { } while (0)
     78#define bc_disable() do { } while (0)
     79#define bc_wback_inv(page, size) do { } while (0)
     80#define bc_inv(page, size) do { } while (0)
     81#define bc_prefetch_enable() do { } while (0)
     82#define bc_prefetch_disable() do { } while (0)
     83#define bc_prefetch_is_enabled() 0
     84
     85#endif /* !defined(CONFIG_BOARD_SCACHE) */
     86
     87#endif /* _ASM_BCACHE_H */