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-rw-r--r--src/emu/emumem_hedw.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/src/emu/emumem_hedw.h b/src/emu/emumem_hedw.h
new file mode 100644
index 00000000000..ed51d826f97
--- /dev/null
+++ b/src/emu/emumem_hedw.h
@@ -0,0 +1,61 @@
+// license:BSD-3-Clause
+// copyright-holders:Olivier Galibert
+
+// handler_entry_write_dispatch
+
+// dispatches an access among multiple handlers indexed on part of the address
+
+template<int HighBits, int Width, int AddrShift, int Endian> class handler_entry_write_dispatch : public handler_entry_write<Width, AddrShift, Endian>
+{
+public:
+ using uX = typename handler_entry_size<Width>::uX;
+ using inh = handler_entry_write<Width, AddrShift, Endian>;
+ using mapping = typename inh::mapping;
+
+ handler_entry_write_dispatch(address_space *space, const handler_entry::range &init, handler_entry_write<Width, AddrShift, Endian> *handler);
+ ~handler_entry_write_dispatch();
+
+ void write(offs_t offset, uX data, uX mem_mask) override;
+ void *get_ptr(offs_t offset) const override;
+ void lookup(offs_t address, offs_t &start, offs_t &end, handler_entry_write<Width, AddrShift, Endian> *&handler) const override;
+
+ void dump_map(std::vector<memory_entry> &map) const override;
+
+ std::string name() const override;
+
+ void populate_nomirror(offs_t start, offs_t end, offs_t ostart, offs_t oend, handler_entry_write<Width, AddrShift, Endian> *handler) override;
+ void populate_mirror(offs_t start, offs_t end, offs_t ostart, offs_t oend, offs_t mirror, handler_entry_write<Width, AddrShift, Endian> *handler) override;
+ void populate_mismatched_nomirror(offs_t start, offs_t end, offs_t ostart, offs_t oend, const memory_units_descriptor<Width, AddrShift, Endian> &descriptor, u8 rkey, std::vector<mapping> &mappings) override;
+ void populate_mismatched_mirror(offs_t start, offs_t end, offs_t ostart, offs_t oend, offs_t mirror, const memory_units_descriptor<Width, AddrShift, Endian> &descriptor, std::vector<mapping> &mappings) override;
+ void populate_passthrough_nomirror(offs_t start, offs_t end, offs_t ostart, offs_t oend, handler_entry_write_passthrough<Width, AddrShift, Endian> *handler, std::vector<mapping> &mappings) override;
+ void populate_passthrough_mirror(offs_t start, offs_t end, offs_t ostart, offs_t oend, offs_t mirror, handler_entry_write_passthrough<Width, AddrShift, Endian> *handler, std::vector<mapping> &mappings) override;
+ void detach(const std::unordered_set<handler_entry *> &handlers) override;
+ void range_cut_before(offs_t address, int start = COUNT);
+ void range_cut_after(offs_t address, int start = -1);
+
+ void enumerate_references(handler_entry::reflist &refs) const override;
+
+protected:
+ static constexpr u32 LowBits = handler_entry_dispatch_lowbits(HighBits, Width, AddrShift);
+ static constexpr u32 BITCOUNT = HighBits > LowBits ? HighBits - LowBits : 0;
+ static constexpr u32 COUNT = 1 << BITCOUNT;
+ static constexpr offs_t BITMASK = make_bitmask<offs_t>(BITCOUNT);
+ static constexpr offs_t LOWMASK = make_bitmask<offs_t>(LowBits);
+ static constexpr offs_t HIGHMASK = make_bitmask<offs_t>(HighBits) ^ LOWMASK;
+ static constexpr offs_t UPMASK = ~make_bitmask<offs_t>(HighBits);
+
+ handler_entry_write<Width, AddrShift, Endian> *m_dispatch[COUNT];
+ handler_entry::range m_ranges[COUNT];
+
+private:
+ void populate_nomirror_subdispatch(offs_t entry, offs_t start, offs_t end, offs_t ostart, offs_t oend, handler_entry_write<Width, AddrShift, Endian> *handler);
+ void populate_mirror_subdispatch(offs_t entry, offs_t start, offs_t end, offs_t ostart, offs_t oend, offs_t mirror, handler_entry_write<Width, AddrShift, Endian> *handler);
+
+ void populate_mismatched_nomirror_subdispatch(offs_t entry, offs_t start, offs_t end, offs_t ostart, offs_t oend, const memory_units_descriptor<Width, AddrShift, Endian> &descriptor, u8 rkey, std::vector<mapping> &mappings);
+ void populate_mismatched_mirror_subdispatch(offs_t entry, offs_t start, offs_t end, offs_t ostart, offs_t oend, offs_t mirror, const memory_units_descriptor<Width, AddrShift, Endian> &descriptor, std::vector<mapping> &mappings);
+ void mismatched_patch(const memory_units_descriptor<Width, AddrShift, Endian> &descriptor, u8 rkey, std::vector<mapping> &mappings, handler_entry_write<Width, AddrShift, Endian> *&target);
+
+ void populate_passthrough_nomirror_subdispatch(offs_t entry, offs_t start, offs_t end, offs_t ostart, offs_t oend, handler_entry_write_passthrough<Width, AddrShift, Endian> *handler, std::vector<mapping> &mappings);
+ void populate_passthrough_mirror_subdispatch(offs_t entry, offs_t start, offs_t end, offs_t ostart, offs_t oend, offs_t mirror, handler_entry_write_passthrough<Width, AddrShift, Endian> *handler, std::vector<mapping> &mappings);
+ void passthrough_patch(handler_entry_write_passthrough<Width, AddrShift, Endian> *handler, std::vector<mapping> &mappings, handler_entry_write<Width, AddrShift, Endian> *&target);
+};