diff --git a/nemu/src/cpu/difftest/ref.c b/nemu/src/cpu/difftest/ref.c
index 7d59b4a..3f44732 100644
--- a/nemu/src/cpu/difftest/ref.c
+++ b/nemu/src/cpu/difftest/ref.c
@@ -25,7 +25,7 @@ __EXPORT void difftest_memcpy(paddr_t addr, void *buf, size_t n,
if (direction == DIFFTEST_TO_REF) {
memcpy(guest_to_host(addr), buf, n);
} else {
- assert(0);
+ memcpy(buf, guest_to_host(addr), n);
}
}
diff --git a/npc/LICENSE b/npc/LICENSE
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/npc/LICENSE
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
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+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ Copyright (C)
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+.
diff --git a/npc/csrc/Flow/CMakeLists.txt b/npc/csrc/Flow/CMakeLists.txt
index ad8d2e9..a50b3b6 100644
--- a/npc/csrc/Flow/CMakeLists.txt
+++ b/npc/csrc/Flow/CMakeLists.txt
@@ -1,6 +1,6 @@
include(ChiselBuild)
add_executable(V${TOPMODULE} config.cpp main.cpp)
-target_link_libraries(V${TOPMODULE} PRIVATE disasm sdb)
+target_link_libraries(V${TOPMODULE} PRIVATE sdb)
verilate(V${TOPMODULE} TRACE COVERAGE THREADS
TOP_MODULE ${TOPMODULE}
diff --git a/npc/csrc/Flow/main.cpp b/npc/csrc/Flow/main.cpp
index b1c37c9..f2933b4 100644
--- a/npc/csrc/Flow/main.cpp
+++ b/npc/csrc/Flow/main.cpp
@@ -7,13 +7,19 @@
#include
#include
#include
-#include
+#include
+#include
#include
+#include
+#include
#include
using VlModule = VlModuleInterfaceCommon;
using Registers = _RegistersVPI;
+// SDB::SDB sdb_dut;
+using CPUState = CPUStateBase;
+CPUState npc_cpu;
extern "C" {
void *pmem_get() {
static auto pmem = new Memory(config.memory_file,
@@ -36,16 +42,21 @@ void pmem_write(int waddr, int wdata, char wmask) {
}
}
-Disassembler d{"riscv32-pc-linux-gnu"};
-
VlModule *top;
Registers *regs;
vpiHandle pc = nullptr;
-void difftest_memcpy(paddr_t, void *, size_t, bool){};
-void difftest_regcpy(void *p, bool direction) {
+namespace NPC {
+void npc_memcpy(paddr_t addr, void *buf, size_t sz, bool direction) {
+ if (direction == TRM_FROM_MACHINE) {
+ memcpy(buf, static_cast *>(pmem_get())->mem.data(),
+ sz);
+ }
+};
- if (direction == DIFFTEST_FROM_REF) {
+void npc_regcpy(void *p, bool direction) {
+
+ if (direction == TRM_FROM_MACHINE) {
((CPUState *)p)->pc = regs->get_pc();
for (int i = 0; i < 32; i++) {
((CPUState *)p)->reg[i] = (*regs)[i];
@@ -53,7 +64,7 @@ void difftest_regcpy(void *p, bool direction) {
}
}
-void difftest_exec(uint64_t n) {
+void npc_exec(uint64_t n) {
while (n--) {
for (int i = 0; i < 2; i++) {
if (top->is_posedge()) {
@@ -64,22 +75,38 @@ void difftest_exec(uint64_t n) {
}
}
}
-// std::cout << d.disassemble(top->rootp->Flow__DOT__pc__DOT__pc_reg, (uint8_t *)&top->rootp->Flow__DOT___ram_inst, 4) << std::endl;
-void difftest_init(int port) {
+void npc_init(int port) {
// top = std::make_unique(config.do_trace, config.wavefile);
top = new VlModule{config.do_trace, config.wavefile};
regs = new Registers("TOP.Flow.reg_0.regFile_", "TOP.Flow.pc.out");
top->reset_eval(10);
}
-DifftestInterface dut_interface = DifftestInterface{
- &difftest_memcpy, &difftest_regcpy, &difftest_exec, &difftest_init};
+class DutTrmInterface : public TrmInterface {
+public:
+ DutTrmInterface(memcpy_t f_memcpy, regcpy_t f_regcpy, exec_t f_exec,
+ init_t f_init, void *cpu_state)
+ : TrmInterface{f_memcpy, f_regcpy, f_exec, f_init, cpu_state} {}
+ word_t at(std::string name) const override {
+ return ((CPUState *)cpu_state)->at(name);
+ }
+
+ word_t at(paddr_t addr) const override {
+ word_t buf;
+ this->memcpy(addr, &buf, sizeof(word_t), TRM_FROM_MACHINE);
+ return buf;
+ }
+ void print(std::ostream &os) const override {}
+};
+
+DutTrmInterface npc_interface =
+ DutTrmInterface{&npc_memcpy, &npc_regcpy, &npc_exec, &npc_init, &npc_cpu};
+}; // namespace NPC
-SDB::SDB sdb_dut;
extern "C" {
word_t reg_str2val(const char *name, bool *success) {
- return sdb_dut.reg_str2val(name, success);
+ return npc_cpu.reg_str2val(name, success);
}
}
@@ -88,20 +115,13 @@ int main(int argc, char **argv, char **env) {
/* -- Difftest -- */
std::filesystem::path ref{config.lib_ref};
- DifftestInterface ref_interface = DifftestInterface{ref};
+ RefTrmInterface ref_interface{ref};
+ DifftestTrmInterface diff_interface{NPC::npc_interface, ref_interface,
+ pmem_get(), 128};
+ SDB::SDB sdb_diff{diff_interface};
- Difftest> diff{dut_interface, ref_interface,
- pmem_get(), 128};
int t = 8;
- sdb_dut.main_loop();
- while (t--) {
- if (!diff.step(1)) {
- uint32_t pc = regs->get_pc();
- uint32_t inst = pmem_read(pc);
- std::cout << diff << d.disassemble(pc, (uint8_t *)&inst, 4) << std::endl;
- return EXIT_FAILURE;
- }
- }
+ sdb_diff.main_loop();
return 0;
}
diff --git a/npc/include/components.hpp b/npc/include/components.hpp
index fced1af..9b5f546 100644
--- a/npc/include/components.hpp
+++ b/npc/include/components.hpp
@@ -11,14 +11,6 @@
#include
#include
-const std::map riscv32_regs_by_name{
- {"$0", 0}, {"ra", 1}, {"sp", 2}, {"gp", 3}, {"tp", 4}, {"t0", 5},
- {"t1", 6}, {"t2", 7}, {"s0", 8}, {"s1", 9}, {"a0", 10}, {"a1", 11},
- {"a2", 12}, {"a3", 13}, {"a4", 14}, {"a5", 15}, {"a6", 16}, {"a7", 17},
- {"s2", 18}, {"s3", 19}, {"s4", 20}, {"s5", 21}, {"s6", 22}, {"s7", 23},
- {"s8", 24}, {"s9", 25}, {"s10", 26}, {"s11", 27}, {"t3", 28}, {"t4", 29},
- {"t5", 30}, {"t6", 31}};
-
template class _RegistersBase {
std::array regs;
T pc;
diff --git a/npc/include/difftest.hpp b/npc/include/difftest.hpp
deleted file mode 100644
index 7349004..0000000
--- a/npc/include/difftest.hpp
+++ /dev/null
@@ -1,130 +0,0 @@
-#ifndef _DIFFTEST_DIFFTEST_H_
-#define _DIFFTEST_DIFFTEST_H_
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-#include