mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 17:54:13 +08:00
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
|
|
*
|
|
* 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 */
|