Update mimpid and marchid for XiangShan

Author: poemonsense

riscv/processor.cc

@@ -451,6 +451,9 @@ void state_t::reset(processor_t* const proc, reg_t max_isa)
 #elif defined(CPU_NUTSHELL)
   csrmap[CSR_MARCHID] = std::make_shared<const_csr_t>(proc, CSR_MARCHID, 0);
   csrmap[CSR_MIMPID] = std::make_shared<const_csr_t>(proc, CSR_MIMPID, 0);
+#elif defined(CPU_XIANGSHAN)
+  csrmap[CSR_MARCHID] = std::make_shared<const_csr_t>(proc, CSR_MARCHID, 25);
+  csrmap[CSR_MIMPID] = std::make_shared<const_csr_t>(proc, CSR_MIMPID, 0);
 #else
   csrmap[CSR_MARCHID] = std::make_shared<const_csr_t>(proc, CSR_MARCHID, 5);
   csrmap[CSR_MIMPID] = std::make_shared<const_csr_t>(proc, CSR_MIMPID, 0);