/* 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 [31mCONFIG_SMP[0m 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 */ |