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#ifndef _RISCV_DEVICES_H
#define _RISCV_DEVICES_H
#include "decode.h"
#include <map>
#include <vector>
class processor_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;
// Return a pointer to the start of the page that addr falls in, or NULL if
// there is no IO device at that address.
virtual char* page(reg_t addr) { return NULL; }
virtual ~abstract_device_t() {}
};
class bus_t : public abstract_device_t {
public:
bool load(reg_t addr, size_t len, uint8_t* bytes);
bool store(reg_t addr, size_t len, const uint8_t* bytes);
// Return a pointer to the start of the page that addr falls in, or NULL if
// there is no IO device at that address.
char* page(reg_t paddr);
void add_device(reg_t addr, abstract_device_t* dev);
private:
std::map<reg_t, abstract_device_t*> devices;
};
class rom_device_t : public abstract_device_t {
public:
rom_device_t(std::vector<char> data);
bool load(reg_t addr, size_t len, uint8_t* bytes);
bool store(reg_t addr, size_t len, const uint8_t* bytes);
const std::vector<char>& contents() { return data; }
private:
std::vector<char> data;
};
class rtc_t : public abstract_device_t {
public:
rtc_t(std::vector<processor_t*>&);
bool load(reg_t addr, size_t len, uint8_t* bytes);
bool store(reg_t addr, size_t len, const uint8_t* bytes);
size_t size() { return regs.size() * sizeof(regs[0]); }
void increment(reg_t inc);
private:
std::vector<processor_t*>& procs;
std::vector<uint64_t> regs;
uint64_t time() { return regs[0]; }
};
#endif
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