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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
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parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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-/* Simulator header for cgen scache support.
- Copyright (C) 1998 Free Software Foundation, Inc.
- Contributed by Cygnus Solutions.
-
-This file is part of GDB, the GNU debugger.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#ifndef CGEN_SCACHE_H
-#define CGEN_SCACHE_H
-
-#ifndef WITH_SCACHE
-#define WITH_SCACHE 0
-#endif
-
-/* When caching bb's, instructions are extracted into "chains".
- SCACHE_MAP is a hash table into these chains. */
-
-typedef struct {
- PCADDR pc;
- SCACHE *sc;
-} SCACHE_MAP;
-
-typedef struct cpu_scache {
- /* Simulator cache size. Must be a power of 2.
- This is the number of elements in the `cache' member. */
- unsigned int size;
-#define CPU_SCACHE_SIZE(cpu) ((cpu) -> cgen_cpu.scache.size)
- /* The cache. */
- SCACHE *cache;
-#define CPU_SCACHE_CACHE(cpu) ((cpu) -> cgen_cpu.scache.cache)
-
-#if WITH_SCACHE_PBB
- /* Number of hash chains. Must be a power of 2. */
- unsigned int num_hash_chains;
-#define CPU_SCACHE_NUM_HASH_CHAINS(cpu) ((cpu) -> cgen_cpu.scache.num_hash_chains)
- /* Number of entries in each hash chain.
- The hash table is a statically allocated NxM array where
- N = num_hash_chains
- M = num_hash_chain_entries. */
- unsigned int num_hash_chain_entries;
-#define CPU_SCACHE_NUM_HASH_CHAIN_ENTRIES(cpu) ((cpu) -> cgen_cpu.scache.num_hash_chain_entries)
- /* Maximum number of instructions in a chain.
- ??? This just let's us set a static size of chain_lengths table.
- In a simulation that handles more than just the cpu, this might also be
- used to keep too many instructions from being executed before checking
- for events (or some such). */
- unsigned int max_chain_length;
-#define CPU_SCACHE_MAX_CHAIN_LENGTH(cpu) ((cpu) -> cgen_cpu.scache.max_chain_length)
- /* Special scache entry for (re)starting bb extraction. */
- SCACHE *pbb_begin;
-#define CPU_SCACHE_PBB_BEGIN(cpu) ((cpu) -> cgen_cpu.scache.pbb_begin)
- /* Hash table into cached chains. */
- SCACHE_MAP *hash_table;
-#define CPU_SCACHE_HASH_TABLE(cpu) ((cpu) -> cgen_cpu.scache.hash_table)
- /* Next free entry in cache. */
- SCACHE *next_free;
-#define CPU_SCACHE_NEXT_FREE(cpu) ((cpu) -> cgen_cpu.scache.next_free)
-
- /* Address of cti-chain insn, only used by functional semantics,
- not switch form. */
- SCACHE **pbb_br_npc_ptr;
-#define CPU_PBB_BR_NPC_PTR(cpu) ((cpu) -> cgen_cpu.scache.pbb_br_npc_ptr)
- /* Target's branch address. */
- PCADDR pbb_br_npc;
-#define CPU_PBB_BR_NPC(cpu) ((cpu) -> cgen_cpu.scache.pbb_br_npc)
-#endif /* WITH_SCACHE_PBB */
-
-#if WITH_PROFILE_SCACHE_P
- /* Cache hits, misses. */
- unsigned long hits, misses;
-#define CPU_SCACHE_HITS(cpu) ((cpu) -> cgen_cpu.scache.hits)
-#define CPU_SCACHE_MISSES(cpu) ((cpu) -> cgen_cpu.scache.misses)
-
-#if WITH_SCACHE_PBB
- /* Chain length counts.
- Each element is a count of the number of chains created with that
- length. */
- unsigned long *chain_lengths;
-#define CPU_SCACHE_CHAIN_LENGTHS(cpu) ((cpu) -> cgen_cpu.scache.chain_lengths)
- /* Number of times cache was flushed due to its being full. */
- unsigned long full_flushes;
-#define CPU_SCACHE_FULL_FLUSHES(cpu) ((cpu) -> cgen_cpu.scache.full_flushes)
-#endif
-#endif
-} CPU_SCACHE;
-
-/* Hash a PC value.
- This is split into two parts to help with moving as much of the
- computation out of the main loop. */
-#define CPU_SCACHE_HASH_MASK(cpu) (CPU_SCACHE_SIZE (cpu) - 1)
-#define SCACHE_HASH_PC(pc, mask) \
-((CGEN_MIN_INSN_SIZE == 2 ? ((pc) >> 1) \
- : CGEN_MIN_INSN_SIZE == 4 ? ((pc) >> 2) \
- : (pc)) \
- & (mask))
-
-/* Non-zero if cache is in use. */
-#define USING_SCACHE_P(sd) (STATE_SCACHE_SIZE (sd) > 0)
-
-/* Install the simulator cache into the simulator. */
-MODULE_INSTALL_FN scache_install;
-
-/* Lookup a PC value in the scache [compilation only]. */
-extern SCACHE * scache_lookup (SIM_CPU *, PCADDR);
-/* Return a pointer to at least N buffers. */
-extern SCACHE *scache_lookup_or_alloc (SIM_CPU *, PCADDR, int, SCACHE **);
-/* Flush all cpu's scaches. */
-extern void scache_flush (SIM_DESC);
-/* Flush a cpu's scache. */
-extern void scache_flush_cpu (SIM_CPU *);
-
-/* Scache profiling support. */
-
-/* Print summary scache usage information. */
-extern void scache_print_profile (SIM_CPU *cpu, int verbose);
-
-#if WITH_PROFILE_SCACHE_P
-
-#define PROFILE_COUNT_SCACHE_HIT(cpu) \
-do { \
- if (CPU_PROFILE_FLAGS (cpu) [PROFILE_SCACHE_IDX]) \
- ++ CPU_SCACHE_HITS (cpu); \
-} while (0)
-#define PROFILE_COUNT_SCACHE_MISS(cpu) \
-do { \
- if (CPU_PROFILE_FLAGS (cpu) [PROFILE_SCACHE_IDX]) \
- ++ CPU_SCACHE_MISSES (cpu); \
-} while (0)
-#define PROFILE_COUNT_SCACHE_CHAIN_LENGTH(cpu,length) \
-do { \
- if (CPU_PROFILE_FLAGS (cpu) [PROFILE_SCACHE_IDX]) \
- ++ CPU_SCACHE_CHAIN_LENGTHS (cpu) [length]; \
-} while (0)
-#define PROFILE_COUNT_SCACHE_FULL_FLUSH(cpu) \
-do { \
- if (CPU_PROFILE_FLAGS (cpu) [PROFILE_SCACHE_IDX]) \
- ++ CPU_SCACHE_FULL_FLUSHES (cpu); \
-} while (0)
-
-#else
-
-#define PROFILE_COUNT_SCACHE_HIT(cpu)
-#define PROFILE_COUNT_SCACHE_MISS(cpu)
-#define PROFILE_COUNT_SCACHE_CHAIN_LENGTH(cpu,length)
-#define PROFILE_COUNT_SCACHE_FULL_FLUSH(cpu)
-
-#endif
-
-#endif /* CGEN_SCACHE_H */