exec: introduce MemoryRegionCache
Device models often have to perform multiple access to a single
memory region that is known in advance, but would to use "DMA-style"
functions instead of address_space_map/unmap. This can happen
for example when the data has to undergo endianness conversion.
Introduce a new data structure to cache the result of
address_space_translate without forcing usage of a host address
like address_space_map does.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
index e9004e5..ffe43d5 100644
--- a/include/exec/cpu-all.h
+++ b/include/exec/cpu-all.h
@@ -186,6 +186,29 @@
MemTxAttrs attrs, MemTxResult *result);
void address_space_stq(AddressSpace *as, hwaddr addr, uint64_t val,
MemTxAttrs attrs, MemTxResult *result);
+
+uint32_t lduw_phys_cached(MemoryRegionCache *cache, hwaddr addr);
+uint32_t ldl_phys_cached(MemoryRegionCache *cache, hwaddr addr);
+uint64_t ldq_phys_cached(MemoryRegionCache *cache, hwaddr addr);
+void stl_phys_notdirty_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
+void stw_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
+void stl_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val);
+void stq_phys_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val);
+
+uint32_t address_space_lduw_cached(MemoryRegionCache *cache, hwaddr addr,
+ MemTxAttrs attrs, MemTxResult *result);
+uint32_t address_space_ldl_cached(MemoryRegionCache *cache, hwaddr addr,
+ MemTxAttrs attrs, MemTxResult *result);
+uint64_t address_space_ldq_cached(MemoryRegionCache *cache, hwaddr addr,
+ MemTxAttrs attrs, MemTxResult *result);
+void address_space_stl_notdirty_cached(MemoryRegionCache *cache, hwaddr addr,
+ uint32_t val, MemTxAttrs attrs, MemTxResult *result);
+void address_space_stw_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val,
+ MemTxAttrs attrs, MemTxResult *result);
+void address_space_stl_cached(MemoryRegionCache *cache, hwaddr addr, uint32_t val,
+ MemTxAttrs attrs, MemTxResult *result);
+void address_space_stq_cached(MemoryRegionCache *cache, hwaddr addr, uint64_t val,
+ MemTxAttrs attrs, MemTxResult *result);
#endif
/* page related stuff */
