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// See LICENSE for license details.
#ifndef __MEMIF_H
#define __MEMIF_H
#include <stdint.h>
#include <stddef.h>
#include <stdexcept>
#include "byteorder.h"
typedef uint64_t reg_t;
typedef int64_t sreg_t;
typedef reg_t addr_t;
typedef enum {
memif_endianness_undecided,
memif_endianness_little,
memif_endianness_big
} memif_endianness_t;
class chunked_memif_t
{
public:
virtual void read_chunk(addr_t taddr, size_t len, void* dst) = 0;
virtual void write_chunk(addr_t taddr, size_t len, const void* src) = 0;
virtual void clear_chunk(addr_t taddr, size_t len) = 0;
virtual size_t chunk_align() = 0;
virtual size_t chunk_max_size() = 0;
virtual void set_target_endianness(memif_endianness_t) {}
virtual memif_endianness_t get_target_endianness() const {
return memif_endianness_undecided;
}
virtual ~chunked_memif_t() = default;
};
class memif_t
{
public:
memif_t(chunked_memif_t* _cmemif) : cmemif(_cmemif) {}
virtual ~memif_t(){}
// read and write byte arrays
virtual void read(addr_t addr, size_t len, void* bytes);
virtual void write(addr_t addr, size_t len, const void* bytes);
// read and write 8-bit words
virtual target_endian<uint8_t> read_uint8(addr_t addr);
virtual target_endian<int8_t> read_int8(addr_t addr);
virtual void write_uint8(addr_t addr, target_endian<uint8_t> val);
virtual void write_int8(addr_t addr, target_endian<int8_t> val);
// read and write 16-bit words
virtual target_endian<uint16_t> read_uint16(addr_t addr);
virtual target_endian<int16_t> read_int16(addr_t addr);
virtual void write_uint16(addr_t addr, target_endian<uint16_t> val);
virtual void write_int16(addr_t addr, target_endian<int16_t> val);
// read and write 32-bit words
virtual target_endian<uint32_t> read_uint32(addr_t addr);
virtual target_endian<int32_t> read_int32(addr_t addr);
virtual void write_uint32(addr_t addr, target_endian<uint32_t> val);
virtual void write_int32(addr_t addr, target_endian<int32_t> val);
// read and write 64-bit words
virtual target_endian<uint64_t> read_uint64(addr_t addr);
virtual target_endian<int64_t> read_int64(addr_t addr);
virtual void write_uint64(addr_t addr, target_endian<uint64_t> val);
virtual void write_int64(addr_t addr, target_endian<int64_t> val);
// endianness
virtual void set_target_endianness(memif_endianness_t endianness) {
cmemif->set_target_endianness(endianness);
}
virtual memif_endianness_t get_target_endianness() const {
return cmemif->get_target_endianness();
}
protected:
chunked_memif_t* cmemif;
};
class incompat_xlen : public std::exception {
public:
const unsigned expected_xlen;
const unsigned actual_xlen;
incompat_xlen(unsigned _expected_xlen, unsigned _actual_xlen) : expected_xlen(_expected_xlen), actual_xlen(_actual_xlen) {}
};
#endif // __MEMIF_H
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