87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
// See LICENSE for license details.
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#ifndef MM_EMULATOR_H
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#define MM_EMULATOR_H
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#include <stdint.h>
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#include <cstring>
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#include <queue>
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const int LINE_SIZE = 64; // all cores assume this.
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const size_t MEM_SIZE = (sizeof(long) > 4 ? 4L : 1L) * 1024*1024*1024;
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class mm_t
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{
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public:
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mm_t() : data(0), size(0) {}
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virtual void init(size_t sz, int word_size, int line_size);
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virtual bool req_cmd_ready() = 0;
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virtual bool req_data_ready() = 0;
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virtual bool resp_valid() = 0;
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virtual uint64_t resp_tag() = 0;
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virtual void* resp_data() = 0;
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virtual void tick
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(
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bool req_cmd_val,
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bool req_cmd_store,
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uint64_t req_cmd_addr,
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uint64_t req_cmd_tag,
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bool req_data_val,
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void* req_data_bits,
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bool resp_rdy
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) = 0;
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virtual void* get_data() { return data; }
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virtual size_t get_size() { return size; }
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virtual size_t get_word_size() { return word_size; }
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virtual size_t get_line_size() { return line_size; }
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virtual ~mm_t();
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protected:
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char* data;
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size_t size;
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int word_size;
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int line_size;
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};
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class mm_magic_t : public mm_t
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{
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public:
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mm_magic_t() : store_inflight(false), store_count(0) {}
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virtual void init(size_t sz, int word_size, int line_size);
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virtual bool req_cmd_ready() { return !store_inflight; }
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virtual bool req_data_ready() { return store_inflight; }
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virtual bool resp_valid() { return !resp.empty(); }
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virtual uint64_t resp_tag() { return resp_valid() ? resp.front().first : 0; }
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virtual void* resp_data() { return resp_valid() ? &resp.front().second[0] : &dummy_data[0]; }
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virtual void tick
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(
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bool req_cmd_val,
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bool req_cmd_store,
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uint64_t req_cmd_addr,
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uint64_t req_cmd_tag,
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bool req_data_val,
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void* req_data_bits,
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bool resp_rdy
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);
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protected:
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bool store_inflight;
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int store_count;
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uint64_t store_addr;
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std::vector<char> dummy_data;
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uint64_t cycle;
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std::queue<std::pair<uint64_t, std::vector<char>>> resp;
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};
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void load_mem(void* mem, const char* fn);
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#endif
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