From 0a4963271c28cea3aa3eabf2115f4a22a4c2fa23 Mon Sep 17 00:00:00 2001
From: Robert Norton
Date: Thu, 27 Apr 2017 10:40:30 +0100
Subject: reverse endianness of data when writing UART. Altera jtag uart is
 little-endian and this change allows it to work when writing using store word
 (as done by FreeBSD driver) or sb (as done by cheri helloworld program).

---
 mips/mips_wrappers.sail | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'mips')

diff --git a/mips/mips_wrappers.sail b/mips/mips_wrappers.sail
index f43b9939..02131204 100644
--- a/mips/mips_wrappers.sail
+++ b/mips/mips_wrappers.sail
@@ -36,13 +36,14 @@
    (mostly identity functions here) *)
 
 function unit effect {wmem} MEMw_wrapper(addr, size, data) = 
+    let ledata = reverse_endianness(data) in
     if (addr == 0x000000007f000000) then
       {
-        UART_WDATA   := data[7..0];
+        UART_WDATA   := ledata[7..0];
         UART_WRITTEN := 1;
       } else {
         MEMea(addr, size);
-        MEMval(addr, size, reverse_endianness(data));
+        MEMval(addr, size, ledata);
       }
 
 function bool effect {wmem} MEMw_conditional_wrapper(addr, size, data) =
-- 
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