add CSR_USVCFG set/get

diff --git a/riscv/processor.cc b/riscv/processor.cc
index 44cedc6e671fdf1a93de1c7c673e15f15057985a..0161abec6fd5d85b0c68bd3468aebbad1ab72233 100644 (file)
--- a/riscv/processor.cc
+++ b/riscv/processor.cc
@@ -509,6 +509,13 @@ void processor_t::set_csr(int which, reg_t val)
       reg_t destoffs = get_field(val, SV_STATE_DESTOFFS);
       state.sv().srcoffs  = std::min(srcoffs , state.sv().vl-1);
       state.sv().destoffs = std::min(destoffs, state.sv().vl-1);
+      int state_bank = get_field(val, SV_STATE_BANK);
+      int state_size = get_field(val, SV_STATE_SIZE);
+      set_csr(CSR_USVCFG, state_bank | (state_size << 3));
+      break;
+    }
+    case CSR_USVCFG:
+    {
       int old_bank = state.sv().state_bank;
       int old_size = state.sv().state_size;
       state.sv().state_bank = get_field(val, SV_STATE_BANK);
@@ -850,6 +857,8 @@ reg_t processor_t::get_csr(int which)
 #ifdef SPIKE_SIMPLEV
     case CSR_USVVL:
       return state.sv().vl;
+    case CSR_USVCFG:
+      return (state.sv().state_bank)      | (state.sv().state_size<<3);
     case CSR_USVSTATE:
       return (state.sv().vl-1)            | ((state.sv().mvl-1)<<6) |
              (state.sv().srcoffs<<12)     | (state.sv().destoffs<<18) |

diff --git a/riscv/sv.h b/riscv/sv.h
index 00f274c248ef37aa0113de7fa8c9a856d992db37..d5db778f5e5a3093d19975356f3f92498df8cfbf 100644 (file)
--- a/riscv/sv.h
+++ b/riscv/sv.h
@@ -111,4 +111,7 @@ typedef struct {
 #define SV_STATE_BANK (0x7<<24)
 #define SV_STATE_SIZE (0x3<<27)
 
+#define SV_CFG_BANK (0x7)
+#define SV_CFG_SIZE (0x3<<3)
+
 #endif