arch-riscv: Enable support for riscv 32-bit in SE mode.

This patch splits up the riscv SE mode support for 32 and 64-bit.
A future patch will add support for decoding rv32 instructions.

Change-Id: Ia79ae19f753caf94dc7e5830a6630efb94b419d7
Signed-off-by: Austin Harris <austinharris@utexas.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/15355
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Alec Roelke <alec.roelke@gmail.com>
Maintainer: Alec Roelke <alec.roelke@gmail.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/sim/process.cc b/src/sim/process.cc
index 62959b4c5..c4dd64107 100644
--- a/src/sim/process.cc
+++ b/src/sim/process.cc
@@ -623,14 +623,19 @@ ProcessParams::create()
         fatal("Unknown/unsupported operating system.");
     }
 #elif THE_ISA == RISCV_ISA
-    if (obj_file->getArch() != ObjectFile::Riscv)
+    ObjectFile::Arch arch = obj_file->getArch();
+    if (arch != ObjectFile::Riscv64 && arch != ObjectFile::Riscv32)
         fatal("Object file architecture does not match compiled ISA (RISCV).");
     switch (obj_file->getOpSys()) {
       case ObjectFile::UnknownOpSys:
         warn("Unknown operating system; assuming Linux.");
         // fall through
       case ObjectFile::Linux:
-        process = new RiscvLinuxProcess(this, obj_file);
+        if (arch == ObjectFile::Riscv64) {
+            process = new RiscvLinuxProcess64(this, obj_file);
+        } else {
+            process = new RiscvLinuxProcess32(this, obj_file);
+        }
         break;
       default:
         fatal("Unknown/unsupported operating system.");