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MN10300: Cache: Implement SMP global cache flushing

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Implement SMP global cache flushing for MN10300.  This will be used by the AM34
which is SMP capable.

Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
Akira Takeuchi
2010-10-27 17:28:47 +01:00
committed by David Howells
parent b478491f26
commit 8be0628923
9 changed files with 535 additions and 15 deletions
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69
arch/mn10300/mm/cache-smp.h Normal file
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/* SMP caching definitions
*
* Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
/*
* Operation requests for smp_cache_call().
*
* One of smp_icache_ops and one of smp_dcache_ops can be OR'd together.
*/
enum smp_icache_ops {
SMP_ICACHE_NOP = 0x0000,
SMP_ICACHE_INV = 0x0001,
SMP_ICACHE_INV_RANGE = 0x0002,
};
#define SMP_ICACHE_OP_MASK 0x0003
enum smp_dcache_ops {
SMP_DCACHE_NOP = 0x0000,
SMP_DCACHE_INV = 0x0004,
SMP_DCACHE_INV_RANGE = 0x0008,
SMP_DCACHE_FLUSH = 0x000c,
SMP_DCACHE_FLUSH_RANGE = 0x0010,
SMP_DCACHE_FLUSH_INV = 0x0014,
SMP_DCACHE_FLUSH_INV_RANGE = 0x0018,
};
#define SMP_DCACHE_OP_MASK 0x001c
#define SMP_IDCACHE_INV_FLUSH (SMP_ICACHE_INV | SMP_DCACHE_FLUSH)
#define SMP_IDCACHE_INV_FLUSH_RANGE (SMP_ICACHE_INV_RANGE | SMP_DCACHE_FLUSH_RANGE)
/*
* cache-smp.c
*/
#ifdef CONFIG_SMP
extern spinlock_t smp_cache_lock;
extern void smp_cache_call(unsigned long opr_mask,
unsigned long addr, unsigned long end);
static inline unsigned long smp_lock_cache(void)
__acquires(&smp_cache_lock)
{
unsigned long flags;
spin_lock_irqsave(&smp_cache_lock, flags);
return flags;
}
static inline void smp_unlock_cache(unsigned long flags)
__releases(&smp_cache_lock)
{
spin_unlock_irqrestore(&smp_cache_lock, flags);
}
#else
static inline unsigned long smp_lock_cache(void) { return 0; }
static inline void smp_unlock_cache(unsigned long flags) {}
static inline void smp_cache_call(unsigned long opr_mask,
unsigned long addr, unsigned long end)
{
}
#endif /* CONFIG_SMP */