167 lines
3.7 KiB
C++
167 lines
3.7 KiB
C++
#pragma once
|
|
|
|
#include <cstdint>
|
|
#include <vector>
|
|
#include <unordered_map>
|
|
#include <cstdint>
|
|
|
|
namespace vortex {
|
|
struct BadAddress {};
|
|
|
|
class MemDevice {
|
|
public:
|
|
virtual ~MemDevice() {}
|
|
virtual uint64_t size() const = 0;
|
|
virtual void read(void *data, uint64_t addr, uint64_t size) = 0;
|
|
virtual void write(const void *data, uint64_t addr, uint64_t size) = 0;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
class RamMemDevice : public MemDevice {
|
|
public:
|
|
RamMemDevice(uint64_t size, uint32_t wordSize);
|
|
RamMemDevice(const char *filename, uint32_t wordSize);
|
|
~RamMemDevice() {}
|
|
|
|
void read(void *data, uint64_t addr, uint64_t size) override;
|
|
void write(const void *data, uint64_t addr, uint64_t size) override;
|
|
|
|
virtual uint64_t size() const {
|
|
return contents_.size();
|
|
};
|
|
|
|
protected:
|
|
std::vector<uint8_t> contents_;
|
|
uint32_t wordSize_;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
class RomMemDevice : public RamMemDevice {
|
|
public:
|
|
RomMemDevice(const char *filename, uint32_t wordSize)
|
|
: RamMemDevice(filename, wordSize)
|
|
{}
|
|
|
|
RomMemDevice(uint64_t size, uint32_t wordSize)
|
|
: RamMemDevice(size, wordSize)
|
|
{}
|
|
|
|
~RomMemDevice();
|
|
|
|
void write(const void *data, uint64_t addr, uint64_t size) override;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
class MemoryUnit {
|
|
public:
|
|
|
|
struct PageFault {
|
|
PageFault(uint64_t a, bool nf)
|
|
: faultAddr(a)
|
|
, notFound(nf)
|
|
{}
|
|
uint64_t faultAddr;
|
|
bool notFound;
|
|
};
|
|
|
|
MemoryUnit(uint64_t pageSize, uint64_t addrBytes, bool disableVm = false);
|
|
|
|
void attach(MemDevice &m, uint64_t start, uint64_t end);
|
|
|
|
void read(void *data, uint64_t addr, uint64_t size, bool sup);
|
|
void write(const void *data, uint64_t addr, uint64_t size, bool sup);
|
|
|
|
void tlbAdd(uint64_t virt, uint64_t phys, uint32_t flags);
|
|
void tlbRm(uint64_t va);
|
|
void tlbFlush() {
|
|
tlb_.clear();
|
|
}
|
|
private:
|
|
|
|
class ADecoder {
|
|
public:
|
|
ADecoder() {}
|
|
|
|
void read(void *data, uint64_t addr, uint64_t size);
|
|
void write(const void *data, uint64_t addr, uint64_t size);
|
|
|
|
void map(uint64_t start, uint64_t end, MemDevice &md);
|
|
|
|
private:
|
|
|
|
struct mem_accessor_t {
|
|
MemDevice* md;
|
|
uint64_t addr;
|
|
};
|
|
|
|
struct entry_t {
|
|
MemDevice *md;
|
|
uint64_t start;
|
|
uint64_t end;
|
|
};
|
|
|
|
bool lookup(uint64_t a, uint32_t wordSize, mem_accessor_t*);
|
|
|
|
std::vector<entry_t> entries_;
|
|
};
|
|
|
|
struct TLBEntry {
|
|
TLBEntry() {}
|
|
TLBEntry(uint32_t pfn, uint32_t flags)
|
|
: pfn(pfn)
|
|
, flags(flags)
|
|
{}
|
|
uint32_t pfn;
|
|
uint32_t flags;
|
|
};
|
|
|
|
TLBEntry tlbLookup(uint64_t vAddr, uint32_t flagMask);
|
|
|
|
std::unordered_map<uint64_t, TLBEntry> tlb_;
|
|
uint64_t pageSize_;
|
|
uint64_t addrBytes_;
|
|
ADecoder decoder_;
|
|
bool disableVM_;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
class RAM : public MemDevice {
|
|
public:
|
|
|
|
RAM(uint32_t page_size);
|
|
~RAM();
|
|
|
|
void clear();
|
|
|
|
uint64_t size() const override;
|
|
|
|
void read(void *data, uint64_t addr, uint64_t size) override;
|
|
void write(const void *data, uint64_t addr, uint64_t size) override;
|
|
|
|
void loadBinImage(const char* filename, uint64_t destination);
|
|
void loadHexImage(const char* filename);
|
|
|
|
uint8_t& operator[](uint64_t address) {
|
|
return *this->get(address);
|
|
}
|
|
|
|
const uint8_t& operator[](uint64_t address) const {
|
|
return *this->get(address);
|
|
}
|
|
|
|
private:
|
|
|
|
uint8_t *get(uint64_t address) const;
|
|
|
|
uint64_t size_;
|
|
uint32_t page_bits_;
|
|
mutable std::unordered_map<uint64_t, uint8_t*> pages_;
|
|
mutable uint8_t* last_page_;
|
|
mutable uint64_t last_page_index_;
|
|
};
|
|
|
|
} // namespace vortex
|