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[SC]SystemC在CPU/GPU验证中的应用（三）

ds 2025/8/22 10:23:34

SystemC在CPU/GPU验证中的应用（三）

摘要：下面分享50个逐步升级SystemC编程能力的示例及建议的学习路线图。您可以一次一批地完成它们——从前五个基础的例子开始，然后转向channels, TLM, bus models, simple CPU/GPU kernels等等。在每个阶段掌握之后，再进行下一组的学习。

50个代表性的SystemC例子

Hello, SystemC! (module + sc_main)
Simple clock generator
4-bit up/down counter
Blocking FIFO channel
Non-blocking handshake channel
Combinational AND/OR modules
D-flip‐flop with async reset
8×1 multiplexer
Simple RAM model (blocking accesses)
Simple ROM model
Dual-port RAM
Bus arbiter (round-robin)
TLM2.0 blocking transport (initiator)
TLM2.0 blocking transport (target)
TLM2.0 non-blocking transport
TLM2.0 analysis port / export
Simple AXI-Lite bus model
AXI-Lite master + slave example
Quantum keeper & time annotation
tlm_utils::simple_initiator_socket
tlm_utils::simple_target_socket
Hierarchical module instantiation
Dynamic process spawn & kill
Event notification & sc_event_queue
Reset synchronization circuit
Clock domain crossing FIFO
Bus monitor / tracer (TLM analysis)
Memory-mapped register file
Interrupt controller model
Pipeline stage model (fetch/decode/execute)
Simple 4-stage CPU datapath
Cache model (direct-mapped)
DMA engine model
GPGPU kernel launcher skeleton
GPU shader core (vector add)
Barrier synchronization (sc_barrier emulation)
Producer-consumer with sc_mutex
sc_semaphore example
SystemC-AMS basic RC filter
Fixed-point arithmetic with sc_fixed
Power‐aware sc_trace (VCD generation)
Cross-trade-off analysis (timing vs. power)
SystemC assertions (SC_ASSERT)
UVM-SystemC basic use case
Co-simulation stub (Verilog DPI)
SystemC Python binding stub
Parameterized module (SC_MODULE_T)
TLM-2.0 generic payload extensions
Simple NoC router model
Full mini‐SOC: CPU + L2 cache + memory + interconnect

Third Batch: Examples 11–20

Below are the first five examples with complete code + detailed comments.

11. Dual-port RAM (阻塞访问)

文件名：dual_port_ram.cpp

#include <systemc.h>
#include <vector>// 定义 RAM 接口（阻塞）
struct ram_if : sc_interface {virtual unsigned int read(unsigned int addr, unsigned int port) = 0;virtual void write(unsigned int addr, unsigned int data, unsigned int port) = 0;
};// 双端口 RAM 模块
SC_MODULE(DualPortRAM) : public ram_if {std::vector<unsigned int> mem;sc_time latency;SC_CTOR(DualPortRAM): mem(256, 0)                // 256×32-bit, latency(sc_time(20, SC_NS)){}// 端口 port = 0 或 1unsigned int read(unsigned int addr, unsigned int port) override {wait(latency);if (addr < mem.size()) return mem[addr];return 0;}void write(unsigned int addr, unsigned int data, unsigned int port) override {wait(latency);if (addr < mem.size()) mem[addr] = data;}
};// Testbench
SC_MODULE(TB_DualPortRAM) {sc_port<ram_if> ram0, ram1;  // 两个端口SC_CTOR(TB_DualPortRAM) {SC_THREAD(proc0);SC_THREAD(proc1);}void proc0() {// 端口 0 先写for (unsigned i = 0; i < 8; ++i) {ram0->write(i, i*100, 0);cout << sc_time_stamp() << " P0 WRITE ["<< i <<"]="<< i*100 << endl;}wait(100, SC_NS);// 端口 0 读for (unsigned i = 0; i < 8; ++i) {unsigned d = ram0->read(i, 0);cout << sc_time_stamp() << " P0 READ  ["<< i <<"]="<< d << endl;}}void proc1() {// 稍后启动端口1，模拟并发wait(40, SC_NS);for (unsigned i = 0; i < 8; ++i) {ram1->write(i, i*1000, 1);cout << sc_time_stamp() << " P1 WRITE ["<< i <<"]="<< i*1000 << endl;}wait(100, SC_NS);for (unsigned i = 0; i < 8; ++i) {unsigned d = ram1->read(i, 1);cout << sc_time_stamp() << " P1 READ  ["<< i <<"]="<< d << endl;}sc_stop();}
};int sc_main(int, char*[]) {DualPortRAM ram("ram");TB_DualPortRAM tb("tb");tb.ram0(ram);tb.ram1(ram);sc_start();return 0;
}

12. Bus Arbiter（轮询）

文件名：bus_arbiter.cpp

#include <systemc.h>// 简单 4-master 轮询仲裁器
SC_MODULE(Arbiter) {sc_in<bool> req[4];sc_out<bool> gnt[4];unsigned idx; // 下一个检查的 masterSC_CTOR(Arbiter): idx(0) {SC_METHOD(prioritize);for (int i = 0; i < 4; ++i)sensitive << req[i];}void prioritize() {// 清空所有 grantfor (int i = 0; i < 4; ++i) gnt[i].write(false);// 轮询检查请求for (int cnt = 0; cnt < 4; ++cnt) {unsigned i = (idx + cnt) % 4;if (req[i].read()) {gnt[i].write(true);idx = (i + 1) % 4; // 下次从 i+1 开始return;}}}
};// Testbench
SC_MODULE(TB_Arbiter) {sc_signal<bool> req[4], gnt[4];Arbiter arb;SC_CTOR(TB_Arbiter): arb("arb") {// 端口绑定for (int i = 0; i < 4; ++i) {arb.req[i](req[i]);arb.gnt[i](gnt[i]);}SC_THREAD(stimulus);SC_METHOD(monitor);for (int i = 0; i < 4; ++i) sensitive << gnt[i];}void stimulus() {// 不同 master 在不同时间发出请求req[0].write(true); wait(10, SC_NS);req[1].write(true); wait(10, SC_NS);req[0].write(false); wait(10, SC_NS);req[2].write(true); wait(10, SC_NS);req[1].write(false); req[2].write(false); req[3].write(true);wait(10, SC_NS);sc_stop();}void monitor() {cout << sc_time_stamp() << " grants:";

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