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bus: send a weak ptr to io

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Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
This commit is contained in:
Amneesh Singh
2024-06-14 20:25:36 +05:30
parent d1df555a6a
commit bafd534671
8 changed files with 121 additions and 94 deletions
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41
include/bus.hh
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@@ -2,41 +2,51 @@
#include "header.hh"
#include "io/io.hh"
#include <memory>
#include <optional>
#include <span>
#include <vector>
namespace matar {
class Bus {
private:
struct Private {
explicit Private() = default;
};
public:
static constexpr uint32_t BIOS_SIZE = 1024 * 16;
Bus(std::array<uint8_t, BIOS_SIZE>&& bios, std::vector<uint8_t>&& rom);
uint8_t read_byte(uint32_t address);
void write_byte(uint32_t address, uint8_t byte);
Bus(Private, std::array<uint8_t, BIOS_SIZE>&&, std::vector<uint8_t>&&);
uint16_t read_halfword(uint32_t address);
void write_halfword(uint32_t address, uint16_t halfword);
static std::shared_ptr<Bus> init(std::array<uint8_t, BIOS_SIZE>&&,
std::vector<uint8_t>&&);
uint32_t read_word(uint32_t address);
void write_word(uint32_t address, uint32_t word);
uint8_t read_byte(uint32_t);
void write_byte(uint32_t, uint8_t);
uint16_t read_halfword(uint32_t);
void write_halfword(uint32_t, uint16_t);
uint32_t read_word(uint32_t);
void write_word(uint32_t, uint32_t);
private:
template<unsigned int N>
std::optional<std::span<const uint8_t>> read(uint32_t address) const;
template<unsigned int>
std::optional<std::span<const uint8_t>> read(uint32_t) const;
template<unsigned int N>
std::optional<std::span<uint8_t>> write(uint32_t address);
template<unsigned int>
std::optional<std::span<uint8_t>> write(uint32_t);
#define MEMORY_REGION(name, start) \
static constexpr uint32_t name##_START = start;
#define DECL_MEMORY(name, ident, start, end) \
MEMORY_REGION(name, start) \
std::array<uint8_t, end - start + 1> ident;
std::array<uint8_t, end - start + 1> ident = {};
MEMORY_REGION(BIOS, 0x00000000)
std::array<uint8_t, BIOS_SIZE> bios;
std::array<uint8_t, BIOS_SIZE> bios = {};
// board working RAM
DECL_MEMORY(BOARD_WRAM, board_wram, 0x02000000, 0x0203FFFF)
@@ -61,9 +71,10 @@ class Bus {
#undef MEMORY_REGION
std::vector<uint8_t> rom;
std::unique_ptr<IoDevices> io;
Header header;
void parse_header();
IoDevices io;
};
}