svc: add ipc accessor boilerplate

libraries/libvapours/include/vapours/svc/arch/arm64/svc_thread_local_region.hpp

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2018-2020 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 <vapours/svc/svc_types_common.hpp>
+
+namespace ams::svc::arch::arm64 {
+
+    constexpr inline size_t NumTlsSlots = 16;
+    constexpr inline size_t MessageBufferSize = 0x100;
+
+    struct ThreadLocalRegion {
+        u32 message_buffer[MessageBufferSize / sizeof(u32)];
+        u16 disable_count;
+        u16 preemption_state;
+        /* TODO: How should we handle libnx vs Nintendo user thread local space? */
+        uintptr_t TODO[(0x200 - 0x108) / sizeof(uintptr_t)];
+    };
+
+    ALWAYS_INLINE ThreadLocalRegion *GetThreadLocalRegion() {
+        ThreadLocalRegion *tlr;
+        __asm__ __volatile__("mrs %[tlr], tpidrro_el0" : [tlr]"=&r"(tlr) :: "memory");
+        return tlr;
+    }
+
+}