mirror of
https://github.com/holub/mame
synced 2025-06-01 18:41:47 +03:00
639c9b85fc
A standard memory handler has as a prototype (where uX = u8, u16, u32 or u64): uX device::read(address_space &space, offs_t offset, uX mem_mask); void device::write(address_space &space, offs_t offset, uX data, uX mem_mask); We now allow simplified versions which are: uX device::read(offs_t offset, uX mem_mask); void device::write(offs_t offset, uX data, uX mem_mask); uX device::read(offs_t offset); void device::write(offs_t offset, uX data); uX device::read(); void device::write(uX data); Use them at will. Also consider (DECLARE_)(READ|WRITE)(8|16|32|64)_MEMBER on the way out, use the explicit prototypes. Same for lambdas in the memory map, the parameters are now optional following the same combinations.
62 lines
4.6 KiB
C++
62 lines
4.6 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Olivier Galibert
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// handler_entry_write_dispatch
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// dispatches an access among multiple handlers indexed on part of the address
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template<int HighBits, int Width, int AddrShift, int Endian> class handler_entry_write_dispatch : public handler_entry_write<Width, AddrShift, Endian>
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{
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public:
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using uX = typename emu::detail::handler_entry_size<Width>::uX;
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using inh = handler_entry_write<Width, AddrShift, Endian>;
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using mapping = typename inh::mapping;
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handler_entry_write_dispatch(address_space *space, const handler_entry::range &init, handler_entry_write<Width, AddrShift, Endian> *handler);
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~handler_entry_write_dispatch();
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void write(offs_t offset, uX data, uX mem_mask) override;
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void *get_ptr(offs_t offset) const override;
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void lookup(offs_t address, offs_t &start, offs_t &end, handler_entry_write<Width, AddrShift, Endian> *&handler) const override;
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void dump_map(std::vector<memory_entry> &map) const override;
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std::string name() const override;
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void populate_nomirror(offs_t start, offs_t end, offs_t ostart, offs_t oend, handler_entry_write<Width, AddrShift, Endian> *handler) override;
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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;
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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;
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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;
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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;
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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;
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void detach(const std::unordered_set<handler_entry *> &handlers) override;
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void range_cut_before(offs_t address, int start = COUNT);
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void range_cut_after(offs_t address, int start = -1);
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void enumerate_references(handler_entry::reflist &refs) const override;
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protected:
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static constexpr u32 LowBits = emu::detail::handler_entry_dispatch_lowbits(HighBits, Width, AddrShift);
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static constexpr u32 BITCOUNT = HighBits > LowBits ? HighBits - LowBits : 0;
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static constexpr u32 COUNT = 1 << BITCOUNT;
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static constexpr offs_t BITMASK = make_bitmask<offs_t>(BITCOUNT);
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static constexpr offs_t LOWMASK = make_bitmask<offs_t>(LowBits);
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static constexpr offs_t HIGHMASK = make_bitmask<offs_t>(HighBits) ^ LOWMASK;
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static constexpr offs_t UPMASK = ~make_bitmask<offs_t>(HighBits);
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handler_entry_write<Width, AddrShift, Endian> *m_dispatch[COUNT];
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handler_entry::range m_ranges[COUNT];
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private:
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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);
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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);
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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);
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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);
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void mismatched_patch(const memory_units_descriptor<Width, AddrShift, Endian> &descriptor, u8 rkey, std::vector<mapping> &mappings, handler_entry_write<Width, AddrShift, Endian> *&target);
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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);
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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);
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void passthrough_patch(handler_entry_write_passthrough<Width, AddrShift, Endian> *handler, std::vector<mapping> &mappings, handler_entry_write<Width, AddrShift, Endian> *&target);
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};
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