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48564041a7
MemoryRegionCache was reverted to "normal" address_space_* operations
for 2.9, due to lack of support for IOMMUs. Reinstate the
optimizations, caching only the IOMMU translation at address_cache_init
but not the IOMMU lookup and target AddressSpace translation are not
cached; now that MemoryRegionCache supports IOMMUs, it becomes more widely
applicable too.
The inlined fast path is defined in memory_ldst_cached.inc.h, while the
slow path uses memory_ldst.inc.c as before. The smaller fast path causes
a little code size reduction in MemoryRegionCache users:
hw/virtio/virtio.o text size before: 32373
hw/virtio/virtio.o text size after: 31941
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/*
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* Memory access templates for MemoryRegionCache
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*
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* Copyright (c) 2018 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#define ADDRESS_SPACE_LD_CACHED(size) \
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glue(glue(address_space_ld, size), glue(ENDIANNESS, _cached))
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#define ADDRESS_SPACE_LD_CACHED_SLOW(size) \
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glue(glue(address_space_ld, size), glue(ENDIANNESS, _cached_slow))
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#define LD_P(size) \
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glue(glue(ld, size), glue(ENDIANNESS, _p))
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static inline uint32_t ADDRESS_SPACE_LD_CACHED(l)(MemoryRegionCache *cache,
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hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
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{
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assert(addr < cache->len && 4 <= cache->len - addr);
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if (likely(cache->ptr)) {
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return LD_P(l)(cache->ptr + addr);
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} else {
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return ADDRESS_SPACE_LD_CACHED_SLOW(l)(cache, addr, attrs, result);
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}
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}
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static inline uint64_t ADDRESS_SPACE_LD_CACHED(q)(MemoryRegionCache *cache,
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hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
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{
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assert(addr < cache->len && 8 <= cache->len - addr);
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if (likely(cache->ptr)) {
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return LD_P(q)(cache->ptr + addr);
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} else {
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return ADDRESS_SPACE_LD_CACHED_SLOW(q)(cache, addr, attrs, result);
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}
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}
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static inline uint32_t ADDRESS_SPACE_LD_CACHED(uw)(MemoryRegionCache *cache,
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hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
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{
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assert(addr < cache->len && 2 <= cache->len - addr);
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if (likely(cache->ptr)) {
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return LD_P(uw)(cache->ptr + addr);
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} else {
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return ADDRESS_SPACE_LD_CACHED_SLOW(uw)(cache, addr, attrs, result);
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}
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}
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#undef ADDRESS_SPACE_LD_CACHED
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#undef ADDRESS_SPACE_LD_CACHED_SLOW
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#undef LD_P
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#define ADDRESS_SPACE_ST_CACHED(size) \
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glue(glue(address_space_st, size), glue(ENDIANNESS, _cached))
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#define ADDRESS_SPACE_ST_CACHED_SLOW(size) \
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glue(glue(address_space_st, size), glue(ENDIANNESS, _cached_slow))
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#define ST_P(size) \
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glue(glue(st, size), glue(ENDIANNESS, _p))
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static inline void ADDRESS_SPACE_ST_CACHED(l)(MemoryRegionCache *cache,
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hwaddr addr, uint32_t val, MemTxAttrs attrs, MemTxResult *result)
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{
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assert(addr < cache->len && 4 <= cache->len - addr);
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if (likely(cache->ptr)) {
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ST_P(l)(cache->ptr + addr, val);
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} else {
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ADDRESS_SPACE_ST_CACHED_SLOW(l)(cache, addr, val, attrs, result);
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}
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}
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static inline void ADDRESS_SPACE_ST_CACHED(w)(MemoryRegionCache *cache,
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hwaddr addr, uint32_t val, MemTxAttrs attrs, MemTxResult *result)
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{
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assert(addr < cache->len && 2 <= cache->len - addr);
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if (likely(cache->ptr)) {
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ST_P(w)(cache->ptr + addr, val);
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} else {
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ADDRESS_SPACE_ST_CACHED_SLOW(w)(cache, addr, val, attrs, result);
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}
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}
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static inline void ADDRESS_SPACE_ST_CACHED(q)(MemoryRegionCache *cache,
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hwaddr addr, uint64_t val, MemTxAttrs attrs, MemTxResult *result)
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{
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assert(addr < cache->len && 8 <= cache->len - addr);
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if (likely(cache->ptr)) {
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ST_P(q)(cache->ptr + addr, val);
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} else {
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ADDRESS_SPACE_ST_CACHED_SLOW(q)(cache, addr, val, attrs, result);
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}
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}
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#undef ADDRESS_SPACE_ST_CACHED
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#undef ADDRESS_SPACE_ST_CACHED_SLOW
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#undef ST_P
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#undef ENDIANNESS
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