From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 5 Nov 2018 08:55:04 +0000 (+0000)
Subject: add CSR_USVCFG set/get
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ba71d502282cf9195bcefa1496d5bf3feb3e05ba;p=riscv-isa-sim.git

add CSR_USVCFG set/get
---

diff --git a/riscv/processor.cc b/riscv/processor.cc
index 44cedc6..0161abe 100644
--- 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 00f274c..d5db778 100644
--- 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