From bc2714ab2a9a505646e726304e7d8353e7597198 Mon Sep 17 00:00:00 2001
From: Maxim Poliakovski <maximumspatium@googlemail.com>
Date: Thu, 15 Feb 2024 15:35:17 +0100
Subject: [PATCH] platinum: handle non-DWORD register accesses.

---
 devices/memctrl/platinum.cpp | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/devices/memctrl/platinum.cpp b/devices/memctrl/platinum.cpp
index 8cc85d4..962c544 100644
--- a/devices/memctrl/platinum.cpp
+++ b/devices/memctrl/platinum.cpp
@@ -113,11 +113,10 @@ uint32_t PlatinumCtrl::read(uint32_t rgn_start, uint32_t offset, int size) {
         }
     }
 
-    if (size != 4) {
-        LOG_F(WARNING, "%s: unsupported register access size %d!", this->name.c_str(),
-              size);
+    // non-DWORD accesses will produce undefined results according with the ERS
+    // I believe we can safely return 0 in this case
+    if (size != 4)
         return 0;
-    }
 
     switch (offset) {
     case PlatinumReg::CPU_ID:
@@ -169,6 +168,12 @@ void PlatinumCtrl::write(uint32_t rgn_start, uint32_t offset, uint32_t value, in
         return;
     }
 
+    if (size != 4) {
+        LOG_F(WARNING, "%s: non-DWORD write access, size %d!", this->name.c_str(),
+              size);
+        return;
+    }
+
     switch (offset) {
     case PlatinumReg::ROM_TIMING:
         this->rom_timing = value;