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8be0628923
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>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/* SMP caching definitions
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*
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* Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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/*
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* Operation requests for smp_cache_call().
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*
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* One of smp_icache_ops and one of smp_dcache_ops can be OR'd together.
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*/
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enum smp_icache_ops {
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SMP_ICACHE_NOP = 0x0000,
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SMP_ICACHE_INV = 0x0001,
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SMP_ICACHE_INV_RANGE = 0x0002,
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};
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#define SMP_ICACHE_OP_MASK 0x0003
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enum smp_dcache_ops {
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SMP_DCACHE_NOP = 0x0000,
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SMP_DCACHE_INV = 0x0004,
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SMP_DCACHE_INV_RANGE = 0x0008,
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SMP_DCACHE_FLUSH = 0x000c,
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SMP_DCACHE_FLUSH_RANGE = 0x0010,
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SMP_DCACHE_FLUSH_INV = 0x0014,
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SMP_DCACHE_FLUSH_INV_RANGE = 0x0018,
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};
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#define SMP_DCACHE_OP_MASK 0x001c
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#define SMP_IDCACHE_INV_FLUSH (SMP_ICACHE_INV | SMP_DCACHE_FLUSH)
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#define SMP_IDCACHE_INV_FLUSH_RANGE (SMP_ICACHE_INV_RANGE | SMP_DCACHE_FLUSH_RANGE)
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/*
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* cache-smp.c
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*/
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#ifdef CONFIG_SMP
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extern spinlock_t smp_cache_lock;
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extern void smp_cache_call(unsigned long opr_mask,
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unsigned long addr, unsigned long end);
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static inline unsigned long smp_lock_cache(void)
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__acquires(&smp_cache_lock)
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{
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unsigned long flags;
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spin_lock_irqsave(&smp_cache_lock, flags);
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return flags;
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}
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static inline void smp_unlock_cache(unsigned long flags)
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__releases(&smp_cache_lock)
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{
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spin_unlock_irqrestore(&smp_cache_lock, flags);
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}
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#else
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static inline unsigned long smp_lock_cache(void) { return 0; }
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static inline void smp_unlock_cache(unsigned long flags) {}
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static inline void smp_cache_call(unsigned long opr_mask,
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unsigned long addr, unsigned long end)
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{
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}
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#endif /* CONFIG_SMP */
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