From 3c7e647a0136b5a7b6fc0eb9b47c38867ec3e9f0 Mon Sep 17 00:00:00 2001
From: Prashanth Mundkur <prashanth.mundkur@gmail.com>
Date: Wed, 13 Feb 2019 18:26:02 -0800
Subject: Add Sv32 and Sv48 by essentially copying Sv39. Being first-order
 prevents straight-forward abstraction over the PTE operations, but perhaps
 there is another way to generalize and unify.

---
 model/riscv_vmem.sail | 59 ---------------------------------------------------
 1 file changed, 59 deletions(-)
 delete mode 100644 model/riscv_vmem.sail

(limited to 'model/riscv_vmem.sail')

diff --git a/model/riscv_vmem.sail b/model/riscv_vmem.sail
deleted file mode 100644
index 33f94dd..0000000
--- a/model/riscv_vmem.sail
+++ /dev/null
@@ -1,59 +0,0 @@
-/* RV64 Supervisor-mode address translation and page-table walks. */
-
-/* Define the architectural satp and its legalizer. */
-
-register satp : xlenbits
-
-function legalize_satp(a : Architecture, o : xlenbits, v : xlenbits) -> xlenbits =
-  legalize_satp64(a, o, v)
-
-/* Compute the address translation mode. */
-
-val translationMode : (Privilege) -> SATPMode effect {rreg, escape}
-function translationMode(priv) = {
-  if priv == Machine then Sbare
-  else {
-    let arch = architecture(get_mstatus_SXL(mstatus));
-    match arch {
-      Some(RV64) => {
-        let mbits : satp_mode = Mk_Satp64(satp).Mode();
-        match satp64Mode_of_bits(RV64, mbits) {
-          Some(m) => m,
-          None()  => internal_error("invalid RV64 translation mode in satp")
-        }
-      },
-      Some(RV32) => {
-        let s = Mk_Satp32(satp[31..0]);
-        if s.Mode() == false then Sbare else Sv32
-      },
-      _    => internal_error("unsupported address translation arch")
-    }
-  }
-}
-
-/* Top-level address translation dispatcher */
-
-val translateAddr : (xlenbits, AccessType, ReadType) -> TR_Result(xlenbits, ExceptionType) effect {escape, rmem, rreg, wmv, wreg}
-function translateAddr(vAddr, ac, rt) = {
-  let effPriv : Privilege = match rt {
-    Instruction => cur_privilege,
-    Data        => if   mstatus.MPRV() == true
-                   then privLevel_of_bits(mstatus.MPP())
-                   else cur_privilege
-  };
-  let mxr    : bool   = mstatus.MXR() == true;
-  let do_sum : bool   = mstatus.SUM() == true;
-  let mode : SATPMode = translationMode(effPriv);
-
-  let asid = curAsid64(satp);
-  let ptb  = curPTB64(satp);
-
-  match mode {
-    Sbare => TR_Address(vAddr),
-    SV39  => match translate39(asid, ptb, vAddr[38 .. 0], ac, effPriv, mxr, do_sum, SV39_LEVELS - 1) {
-               TR_Address(pa) => TR_Address(EXTZ(pa)),
-               TR_Failure(f)  => TR_Failure(translationException(ac, f))
-             },
-    _     => internal_error("unsupported address translation scheme")
-  }
-}
-- 
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