Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mn10300/mm/cache-smp.h
10817 views
1
/* SMP caching definitions

2
 *

3
 * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.

4
 * Written by David Howells ([email protected])

5
 *

6
 * This program is free software; you can redistribute it and/or

7
 * modify it under the terms of the GNU General Public Licence

8
 * as published by the Free Software Foundation; either version

9
 * 2 of the Licence, or (at your option) any later version.

10
 */

11


12


13
/*

14
 * Operation requests for smp_cache_call().

15
 *

16
 * One of smp_icache_ops and one of smp_dcache_ops can be OR'd together.

17
 */

18
enum smp_icache_ops {

19
	SMP_ICACHE_NOP			= 0x0000,

20
	SMP_ICACHE_INV			= 0x0001,

21
	SMP_ICACHE_INV_RANGE		= 0x0002,

22
};

23
#define SMP_ICACHE_OP_MASK		0x0003

24


25
enum smp_dcache_ops {

26
	SMP_DCACHE_NOP			= 0x0000,

27
	SMP_DCACHE_INV			= 0x0004,

28
	SMP_DCACHE_INV_RANGE		= 0x0008,

29
	SMP_DCACHE_FLUSH		= 0x000c,

30
	SMP_DCACHE_FLUSH_RANGE		= 0x0010,

31
	SMP_DCACHE_FLUSH_INV		= 0x0014,

32
	SMP_DCACHE_FLUSH_INV_RANGE	= 0x0018,

33
};

34
#define SMP_DCACHE_OP_MASK		0x001c

35


36
#define	SMP_IDCACHE_INV_FLUSH		(SMP_ICACHE_INV | SMP_DCACHE_FLUSH)

37
#define SMP_IDCACHE_INV_FLUSH_RANGE	(SMP_ICACHE_INV_RANGE | SMP_DCACHE_FLUSH_RANGE)

38


39
/*

40
 * cache-smp.c

41
 */

42
#ifdef CONFIG_SMP

43
extern spinlock_t smp_cache_lock;

44


45
extern void smp_cache_call(unsigned long opr_mask,

46
			   unsigned long addr, unsigned long end);

47


48
static inline unsigned long smp_lock_cache(void)

49
	__acquires(&smp_cache_lock)

50
{

51
	unsigned long flags;

52
	spin_lock_irqsave(&smp_cache_lock, flags);

53
	return flags;

54
}

55


56
static inline void smp_unlock_cache(unsigned long flags)

57
	__releases(&smp_cache_lock)

58
{

59
	spin_unlock_irqrestore(&smp_cache_lock, flags);

60
}

61


62
#else

63
static inline unsigned long smp_lock_cache(void) { return 0; }

64
static inline void smp_unlock_cache(unsigned long flags) {}

65
static inline void smp_cache_call(unsigned long opr_mask,

66
				  unsigned long addr, unsigned long end)

67
{

68
}

69
#endif /* CONFIG_SMP */

70


71