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#ifndef _RISCV_ABSTRACT_DEVICE_H
#define _RISCV_ABSTRACT_DEVICE_H
#include "decode.h"
#include "common.h"
#include <cstdint>
#include <cstddef>
#include <string>
#include <map>
#include <stdexcept>
class sim_t;
class abstract_device_t {
public:
virtual bool load(reg_t addr, size_t len, uint8_t* bytes) = 0;
virtual bool store(reg_t addr, size_t len, const uint8_t* bytes) = 0;
virtual ~abstract_device_t() {}
virtual void tick(reg_t UNUSED rtc_ticks) {}
};
// factory for devices which should show up in the DTS, and can be
// parameterized by parsing the DTS
class device_factory_t {
public:
virtual abstract_device_t* parse_from_fdt(const void* fdt, const sim_t* sim, reg_t* base) const = 0;
virtual std::string generate_dts(const sim_t* sim) const = 0;
virtual ~device_factory_t() {}
};
// Type for holding all registered MMIO plugins by name.
using mmio_device_map_t = std::map<std::string, device_factory_t*>;
mmio_device_map_t& mmio_device_map();
#define REGISTER_DEVICE(name, parse, generate) \
class name##_factory_t : public device_factory_t { \
public: \
name##_factory_t() { \
std::string str(#name); \
if (!mmio_device_map().emplace(str, this).second) throw std::runtime_error("Plugin \"" + str + "\" already registered"); \
}; \
name##_t* parse_from_fdt(const void* fdt, const sim_t* sim, reg_t* base) const override { return parse(fdt, sim, base); } \
std::string generate_dts(const sim_t* sim) const override { return generate(sim); } \
}; device_factory_t *name##_factory = new name##_factory_t();
#endif
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