refactor: remove submodules

am-kernels

@@ -1 +0,0 @@
-Subproject commit 8c4ea046225e2dce599dc36aeef6c4c857996d00

diffu

@@ -1 +0,0 @@
-Subproject commit 645b0f607ae510fda4d71b8152ea932a2b38bc32

flake.nix

@@ -11,6 +11,8 @@
       url = "git+https://git.xinyang.life/xin/nur.git";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    # diffu.url = "github:xinyangli/diffu";
+    # am-kernels.url = "git+https://git.xinyang.life/xin/am-kernels.git";
   };
 
   outputs = { self, flake-utils, nixpkgs, nixpkgs-circt162, pre-commit-hooks, nur-xin }@inputs:
@@ -65,13 +67,9 @@
           abstract-machine = pkgs.callPackage ./abstract-machine { isa = "native"; };
           nemu = pkgs.callPackage ./nemu { };
           nemu-lib = pkgs.callPackage ./nemu { };
-          am-kernels = pkgs.callPackage ./am-kernels { abstract-machine = abstract-machine; arch = "native"; };
 
           rv32Cross = rec {
             abstract-machine = rv32CrossConfig.callPackage ./abstract-machine { isa = "riscv"; platform = [ "nemu" "npc" ]; };
-            am-kernels-npc = rv32CrossConfig.callPackage ./am-kernels { inherit abstract-machine; arch = "riscv-npc"; };
-            am-kernels-nemu = rv32CrossConfig.callPackage ./am-kernels { inherit abstract-machine; arch = "riscv-nemu"; };
-            am-kernels = rv32CrossConfig.callPackage ./am-kernels { abstract-machine = abstract-machine; arch = "riscv"; };
           };
         };
 
@@ -94,13 +92,13 @@
             self.packages.${system}.nemu
           ];
           NEMU_HOME = "/home/xin/repo/ysyx-workbench/nemu";
-          NEMU_IMAGES_PATH = self.packages.${system}.rv32Cross.am-kernels-nemu + "/share/am-kernels";
+          # NEMU_IMAGES_PATH = self.packages.${system}.rv32Cross.am-kernels-nemu + "/share/am-kernels";
         };
 
         devShells.npc = pkgs.mkShell.override { stdenv = pkgs.ccacheStdenv; } {
           inherit (self.checks.${system}.pre-commit-check) shellHook;
           CHISEL_FIRTOOL_PATH = "${nixpkgs-circt162.legacyPackages.${system}.circt}/bin";
-          NPC_IMAGES_PATH = "${self.packages.${system}.rv32Cross.am-kernels-npc}/share/am-kernels";
+          # NPC_IMAGES_PATH = "${self.packages.${system}.rv32Cross.am-kernels-npc}/share/am-kernels";
           packages = with pkgs; [
             clang-tools
             cmake
@@ -125,7 +123,6 @@
             flex
             bison
             verilator
-            self.packages.${system}.rv32Cross.am-kernels-npc
           ];
 
           buildInputs = with pkgs; [

nemu/src/device/Kconfig

@@ -1,5 +1,4 @@
 menuconfig DEVICE
-  depends on !TARGET_SHARE
   bool "Devices"
   default n
   help

nemu/src/device/io/map.c

@@ -13,10 +13,10 @@
 * See the Mulan PSL v2 for more details.
 ***************************************************************************************/
 
+#include <device/map.h>
 #include <isa.h>
 #include <memory/host.h>
 #include <memory/vaddr.h>
-#include <device/map.h>
 
 #define IO_SPACE_MAX (2 * 1024 * 1024)
 
@@ -33,17 +33,25 @@ uint8_t* new_space(int size) {
 }
 
 static void check_bound(IOMap *map, paddr_t addr) {
+#ifndef CONFIG_TARGET_SHARE
   if (map == NULL) {
-    Assert(map != NULL, "address (" FMT_PADDR ") is out of bound at pc = " FMT_WORD, addr, cpu.pc);
+    Assert(map != NULL,
+           "address (" FMT_PADDR ") is out of bound at pc = " FMT_WORD, addr,
+           cpu.pc);
   } else {
     Assert(addr <= map->high && addr >= map->low,
-        "address (" FMT_PADDR ") is out of bound {%s} [" FMT_PADDR ", " FMT_PADDR "] at pc = " FMT_WORD,
+           "address (" FMT_PADDR ") is out of bound {%s} [" FMT_PADDR
+           ", " FMT_PADDR "] at pc = " FMT_WORD,
            addr, map->name, map->low, map->high, cpu.pc);
   }
+#endif
 }
 
-static void invoke_callback(io_callback_t c, paddr_t offset, int len, bool is_write) {
-  if (c != NULL) { c(offset, len, is_write); }
+static void invoke_callback(io_callback_t c, paddr_t offset, int len,
+                            bool is_write) {
+  if (c != NULL) {
+    c(offset, len, is_write);
+  }
 }
 
 void init_map() {

nemu/src/isa/riscv32/inst.c

@@ -86,38 +86,16 @@ static void decode_operand(Decode *s, int *rd, word_t *src1, word_t *src2,
   int rs2 = BITS(i, 24, 20);
   *rd = BITS(i, 11, 7);
   switch (type) {
-  case TYPE_R:
-    src1R();
-    src2R();
-    break;
-  case TYPE_I:
-    src1R();
-    immI();
-    break;
-  case TYPE_U:
-    immU();
-    break;
-  case TYPE_J:
-    immJ();
-    break;
-  case TYPE_S:
-    src1R();
-    src2R();
-    immS();
-    break;
-  case TYPE_B:
-    src1R();
-    src2R();
-    immB();
-    break;
-  case TYPE_CSR:
-    src1R();
-    csr();
-    break;
-  case TYPE_CSRI:
-    csr();
-    uimm();
-    break;
+    // clang-format off
+  case TYPE_R: src1R(); src2R(); break;
+  case TYPE_I: src1R(); immI(); break;
+  case TYPE_U: immU(); break;
+  case TYPE_J: immJ(); break;
+  case TYPE_S: src1R(); src2R(); immS(); break;
+  case TYPE_B: src1R(); src2R(); immB(); break;
+  case TYPE_CSR: src1R(); csr(); break;
+  case TYPE_CSRI: csr(); uimm(); break;
+    // clang-format on
   }
 }
 
@@ -271,6 +249,9 @@ static int decode_exec(Decode *s) {
 
   // "Previledge"
   // -- CSR instructions
+  // src2: R(read register)
+  // src1: R(write source)
+  // imm: write data()
   INSTPAT(
       "??????? ????? ????? 001 ????? 11100 11", csrrw, CSR, do {
         R(rd) = read_csr(cpu.csr, src2);

nemu/src/isa/riscv32/reg.c

@@ -52,13 +52,11 @@ word_t isa_reg_str2val(const char *s, bool *success) {
 }
 
 int isa_read_reg(void *args, int regno, size_t *reg_value) {
-  if (regno > 33) {
+  if (regno > 32) {
     return EFAULT;
   }
 
-  if (regno == 33) {
-    *reg_value = cpu.csr[MTVEC];
-  } else if (regno == 32) {
+  if (regno == 32) {
     *reg_value = cpu.pc;
   } else {
     *reg_value = cpu.gpr[regno];
@@ -67,13 +65,11 @@ int isa_read_reg(void *args, int regno, size_t *reg_value) {
 }
 
 int isa_write_reg(void *args, int regno, size_t data) {
-  if (regno > 33) {
+  if (regno > 32) {
     return EFAULT;
   }
 
-  if (regno == 33) {
-    cpu.csr[MTVEC] = data;
-  } else if (regno == 32) {
+  if (regno == 32) {
     cpu.pc = data;
   } else {
     cpu.gpr[regno] = data;
@@ -81,6 +77,6 @@ int isa_write_reg(void *args, int regno, size_t data) {
   return 0;
 }
 
-__EXPORT arch_info_t isa_arch_info = {.reg_num = 33,
+__EXPORT arch_info_t isa_arch_info = {.reg_num = 32,
                                       .reg_byte = MUXDEF(CONFIG_RV64, 8, 4),
                                       .target_desc = TARGET_RV32};

nemu/src/memory/paddr.c

@@ -15,6 +15,7 @@
 
 #include "common.h"
 #include "debug.h"
+#include "utils.h"
 #include <device/mmio.h>
 #include <isa.h>
 #include <memory/host.h>
@@ -44,9 +45,14 @@ static void pmem_write(paddr_t addr, int len, word_t data) {
 }
 
 static void out_of_bound(paddr_t addr) {
+#ifdef CONFIG_TARGET_SHARE
+  // Do not panic when used as a library. Give an error in log
+  Error("Out of bound at 0x%x", addr);
+#else
   panic("address = " FMT_PADDR " is out of bound of pmem [" FMT_PADDR
         ", " FMT_PADDR "] at pc = " FMT_WORD,
         addr, PMEM_LEFT, PMEM_RIGHT, cpu.pc);
+#endif
 }
 
 #ifdef CONFIG_MTRACE

nemu/src/monitor/gdbstub.cc

@@ -1,3 +1,4 @@
+#include "types.h"
 #include "utils.h"
 #include <vector>
 
@@ -18,7 +19,7 @@ typedef struct {
 
 __EXPORT size_t nemu_dbg_state_size = sizeof(DbgState);
 __EXPORT bool nemu_do_difftest = true;
-__EXPORT arch_info_t nemu_isa_arch_info;
+__EXPORT arch_info_t nemu_isa_arch_info = isa_arch_info;
 
 __EXPORT int nemu_read_mem(void *args, size_t addr, size_t len, void *val) {
   if (!in_pmem(addr))

nemu/src/utils/disasm.cc

@@ -59,7 +59,8 @@ extern "C" void init_disasm(const char *triple) {
   llvm::MCRegisterInfo *gMRI = nullptr;
   auto target = llvm::TargetRegistry::lookupTarget(gTriple, errstr);
   if (!target) {
-    llvm::errs() << "Can't find target for " << gTriple << ": " << errstr << "\n";
+    llvm::errs() << "Can't find target for " << gTriple << ": " << errstr
+                 << "\n";
     assert(0);
   }
 
@@ -85,14 +86,16 @@ extern "C" void init_disasm(const char *triple) {
 #endif
   gDisassembler = target->createMCDisassembler(*gSTI, *Ctx);
   gIP = target->createMCInstPrinter(llvm::Triple(gTriple),
-      AsmInfo->getAssemblerDialect(), *AsmInfo, *gMII, *gMRI);
+                                    AsmInfo->getAssemblerDialect(), *AsmInfo,
+                                    *gMII, *gMRI);
   gIP->setPrintImmHex(true);
   gIP->setPrintBranchImmAsAddress(true);
   if (isa == "riscv32" || isa == "riscv64")
     gIP->applyTargetSpecificCLOption("no-aliases");
 }
 
-extern "C" void disassemble(char *str, int size, uint64_t pc, uint8_t *code, int nbyte) {
+extern "C" void disassemble(char *str, int size, uint64_t pc, uint8_t *code,
+                            int nbyte) {
   MCInst inst;
   llvm::ArrayRef<uint8_t> arr(code, nbyte);
   uint64_t dummy_size = 0;

nemu/tools/spike-diff/difftest.cc

@@ -13,17 +13,18 @@
 * See the Mulan PSL v2 for more details.
 ***************************************************************************************/
 
+#include "../../include/common.h"
 #include "mmu.h"
 #include "sim.h"
-#include "../../include/common.h"
 #include <difftest-def.h>
 
 #define NR_GPR MUXDEF(CONFIG_RVE, 16, 32)
 
-static std::vector<std::pair<reg_t, abstract_device_t*>> difftest_plugin_devices;
+static std::vector<std::pair<reg_t, abstract_device_t *>>
+    difftest_plugin_devices;
 static std::vector<std::string> difftest_htif_args;
-static std::vector<std::pair<reg_t, mem_t*>> difftest_mem(
-    1, std::make_pair(reg_t(DRAM_BASE), new mem_t(CONFIG_MSIZE)));
+static std::vector<std::pair<reg_t, mem_t *>>
+    difftest_mem(1, std::make_pair(reg_t(DRAM_BASE), new mem_t(CONFIG_MSIZE)));
 static debug_module_config_t difftest_dm_config = {
     .progbufsize = 2,
     .max_sba_data_width = 0,
@@ -33,8 +34,7 @@ static debug_module_config_t difftest_dm_config = {
     .support_abstract_csr_access = true,
     .support_abstract_fpr_access = true,
     .support_haltgroups = true,
-  .support_impebreak = true
-};
+    .support_impebreak = true};
 
 struct diff_context_t {
   word_t gpr[MUXDEF(CONFIG_RVE, 16, 32)];
@@ -50,9 +50,7 @@ void sim_t::diff_init(int port) {
   state = p->get_state();
 }
 
-void sim_t::diff_step(uint64_t n) {
-  step(n);
-}
+void sim_t::diff_step(uint64_t n) { step(n); }
 
 void sim_t::diff_get_regs(void *diff_context) {
   struct diff_context_t *ctx = (struct diff_context_t *)diff_context;
@@ -79,7 +77,8 @@ void sim_t::diff_memcpy(reg_t dest, void* src, size_t n) {
 
 extern "C" {
 
-__EXPORT void difftest_memcpy(paddr_t addr, void *buf, size_t n, bool direction) {
+__EXPORT void difftest_memcpy(paddr_t addr, void *buf, size_t n,
+                              bool direction) {
   if (direction == DIFFTEST_TO_REF) {
     s->diff_memcpy(addr, buf, n);
   } else {
@@ -95,13 +94,12 @@ __EXPORT void difftest_regcpy(void* dut, bool direction) {
   }
 }
 
-__EXPORT void difftest_exec(uint64_t n) {
-  s->diff_step(n);
-}
+__EXPORT void difftest_exec(uint64_t n) { s->diff_step(n); }
 
 __EXPORT void difftest_init(int port) {
   difftest_htif_args.push_back("");
-  const char *isa = "RV" MUXDEF(CONFIG_RV64, "64", "32") MUXDEF(CONFIG_RVE, "E", "I") "MAFDC";
+  const char *isa =
+      "RV" MUXDEF(CONFIG_RV64, "64", "32") MUXDEF(CONFIG_RVE, "E", "I") "MAFDC";
   cfg_t cfg(/*default_initrd_bounds=*/std::make_pair((reg_t)0, (reg_t)0),
             /*default_bootargs=*/nullptr,
             /*default_isa=*/isa,
@@ -114,12 +112,9 @@ __EXPORT void difftest_init(int port) {
             /*default_hartids=*/std::vector<size_t>(1),
             /*default_real_time_clint=*/false,
             /*default_trigger_count=*/4);
-  s = new sim_t(&cfg, false,
-      difftest_mem, difftest_plugin_devices, difftest_htif_args,
-      difftest_dm_config, nullptr, false, NULL,
-      false,
-      NULL,
-      true);
+  s = new sim_t(&cfg, false, difftest_mem, difftest_plugin_devices,
+                difftest_htif_args, difftest_dm_config, nullptr, false, NULL,
+                false, NULL, true);
   s->diff_init(port);
 }
 
@@ -127,5 +122,4 @@ __EXPORT void difftest_raise_intr(uint64_t NO) {
   trap_t t(NO);
   p->take_trap_public(t, state->pc);
 }
-
 }