Amneesh Singh
9397140473
also fix bus' shared pointer in cpu TODO: put cpu in bus not the other way around Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
#pragma once
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#include "header.hh"
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#include "io/io.hh"
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#include <optional>
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#include <span>
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#include <vector>
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namespace matar {
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class Bus {
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public:
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static constexpr uint32_t BIOS_SIZE = 1024 * 16;
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Bus(std::array<uint8_t, BIOS_SIZE>&& bios, std::vector<uint8_t>&& rom);
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uint8_t read_byte(uint32_t address);
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void write_byte(uint32_t address, uint8_t byte);
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uint16_t read_halfword(uint32_t address);
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void write_halfword(uint32_t address, uint16_t halfword);
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uint32_t read_word(uint32_t address);
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void write_word(uint32_t address, uint32_t word);
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private:
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template<unsigned int N>
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std::optional<std::span<const uint8_t>> read(uint32_t address) const;
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template<unsigned int N>
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std::optional<std::span<uint8_t>> write(uint32_t address);
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#define MEMORY_REGION(name, start) \
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static constexpr uint32_t name##_START = start;
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#define DECL_MEMORY(name, ident, start, end) \
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MEMORY_REGION(name, start) \
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std::array<uint8_t, end - start + 1> ident;
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MEMORY_REGION(BIOS, 0x00000000)
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std::array<uint8_t, BIOS_SIZE> bios;
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// board working RAM
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DECL_MEMORY(BOARD_WRAM, board_wram, 0x02000000, 0x0203FFFF)
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// chip working RAM
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DECL_MEMORY(CHIP_WRAM, chip_wram, 0x03000000, 0x03007FFF)
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// palette RAM
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DECL_MEMORY(PALETTE_RAM, palette_ram, 0x05000000, 0x050003FF)
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// video RAM
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DECL_MEMORY(VRAM, vram, 0x06000000, 0x06017FFF)
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// OAM OBJ attributes
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DECL_MEMORY(OAM_OBJ_ATTR, oam_obj_attr, 0x07000000, 0x070003FF)
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#undef DECL_MEMORY
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MEMORY_REGION(ROM_0, 0x08000000)
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MEMORY_REGION(ROM_1, 0x0A000000)
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MEMORY_REGION(ROM_2, 0x0C000000)
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#undef MEMORY_REGION
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std::vector<uint8_t> rom;
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Header header;
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void parse_header();
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IoDevices io;
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};
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}
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