thermosphere: handle stage2 data aborts, trap gicd accesses

thermosphere/src/data_abort.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2019 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "exceptions.h"
+
+typedef struct DataAbortIss {
+    u32 dfsc        : 6; // Fault status code
+
+    u32 wnr         : 1; // Write, not Read
+    u32 s1ptw       : 1; // Stage1 page table walk fault
+    u32 cm          : 1; // Cache maintenance
+    u32 ea          : 1; // External abort
+    u32 fnv         : 1; // FAR not Valid
+    u32 set         : 2; // Synchronous error type
+    u32 vncr        : 1; // vncr_el2 trap
+
+    u32 ar          : 1; // Acquire/release. Bit 14
+    u32 sf          : 1; // 64-bit register used
+    u32 srt         : 1; // Syndrome register transfer (register used)
+    u32 sse         : 1; // Syndrome sign extend
+    u32 sas         : 2; // Syndrome access size. Bit 23
+
+    u32 isv         : 1; // Instruction syndrome valid (ISS[23:14] valid)
+} DataAbortIss;
+
+void dumpUnhandledDataAbort(DataAbortIss dabtIss, u64 far, const char *msg);
+void handleLowerElDataAbortException(ExceptionStackFrame *frame, ExceptionSyndromeRegister esr);