Implement support for big-endian targets

1 files changed, 19 insertions, 0 deletions

diff --git a/fesvr/memif.h b/fesvr/memif.h
index 3854d66..aaa9f05 100644
--- a/fesvr/memif.h
+++ b/fesvr/memif.h
@@ -10,6 +10,12 @@ typedef uint64_t reg_t;
 typedef int64_t sreg_t;
 typedef reg_t addr_t;
 
+typedef enum {
+  memif_endianness_undecided,
+  memif_endianness_little,
+  memif_endianness_big
+} memif_endianness_t;
+
 class chunked_memif_t
 {
 public:
@@ -19,6 +25,11 @@ public:
 
   virtual size_t chunk_align() = 0;
   virtual size_t chunk_max_size() = 0;
+
+  virtual void set_target_endianness(memif_endianness_t endianness) {}
+  virtual memif_endianness_t get_target_endianness() const {
+    return memif_endianness_undecided;
+  }
 };
 
 class memif_t
@@ -55,6 +66,14 @@ public:
   virtual void write_uint64(addr_t addr, uint64_t val);
   virtual void write_int64(addr_t addr, int64_t val);
 
+  // endianness
+  virtual void set_target_endianness(memif_endianness_t endianness) {
+    cmemif->set_target_endianness(endianness);
+  }
+  virtual memif_endianness_t get_target_endianness() const {
+    return cmemif->get_target_endianness();
+  }
+
 protected:
   chunked_memif_t* cmemif;
 };