/* Sun-$Revision: 23.7 $ */
/* Copyright 1992-9 Sun Microsystems, Inc. and Stanford University.
See the LICENSE file for license information. */
# pragma interface
// Handle "self-modifying" code on processors with separate I-caches.
// To minimize the performance penalty of the flushes, the VM always
// does a sequence of selective flushes followed by a flush_instruction_cache_for_debugging().
// On the SPARC, the selective flushes are more efficient; on the 68K, the
// global flush.
// For processors with a small I-cache / without selective cache invalidation,
// define MachineCache::flush_instruction_cache_for_debugging to flush the entire I-cache. Otherwise, make it a no-op.
// For processors with selective cache invalidation,
// define flushCacheWord and flushCacheRange
class MachineCache {
public:
static void flush_instruction_cache_for_debugging();
static void flush_instruction_cache_word(void* addr); // flush one 32-bit word (instruction)
static void flush_instruction_cache_range(void* start, void* end);// flush range [start, end)
# include "_machineCache_pd.h.incl"
};
// define FLUSH_ALL (for debugging) to flush the complete I cache of nmethods
// and PICs very regularly
# ifndef FLUSH_ALL
inline void MachineCache::flush_instruction_cache_for_debugging() {}
# endif
