From 68e29b56b6f34a21609ad36c65433b3809987ea6 Mon Sep 17 00:00:00 2001
From: fincs <fincs@devkitpro.org>
Date: Mon, 10 Aug 2020 21:54:13 +0200
Subject: [PATCH] kern: add stubbed KDevicePageTable implementation for systems
 without iommu

---
 .../generic/kern_k_device_page_table.hpp      | 47 +++++++++++++++++++
 .../kern_select_device_page_table.hpp         |  7 ++-
 .../svc/board/generic/svc_device_name.hpp     | 26 ++++++++++
 .../vapours/svc/svc_select_device_name.hpp    |  5 +-
 4 files changed, 83 insertions(+), 2 deletions(-)
 create mode 100644 libraries/libmesosphere/include/mesosphere/board/generic/kern_k_device_page_table.hpp
 create mode 100644 libraries/libvapours/include/vapours/svc/board/generic/svc_device_name.hpp

diff --git a/libraries/libmesosphere/include/mesosphere/board/generic/kern_k_device_page_table.hpp b/libraries/libmesosphere/include/mesosphere/board/generic/kern_k_device_page_table.hpp
new file mode 100644
index 000000000..e87148680
--- /dev/null
+++ b/libraries/libmesosphere/include/mesosphere/board/generic/kern_k_device_page_table.hpp
@@ -0,0 +1,47 @@
+/*
+ * 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 <mesosphere/kern_common.hpp>
+#include <mesosphere/kern_k_page_group.hpp>
+#include <mesosphere/kern_k_memory_manager.hpp>
+#include <mesosphere/kern_select_page_table.hpp>
+
+namespace ams::kern::board::generic {
+
+    using KDeviceVirtualAddress = u64;
+
+    class KDevicePageTable {
+        public:
+            constexpr KDevicePageTable() { /* ... */ }
+
+            Result ALWAYS_INLINE Initialize(u64 space_address, u64 space_size) { return ams::kern::svc::ResultNotImplemented(); }
+            void ALWAYS_INLINE Finalize() { /* ... */ }
+
+            Result ALWAYS_INLINE Attach(ams::svc::DeviceName device_name, u64 space_address, u64 space_size) { return ams::kern::svc::ResultNotImplemented(); }
+            Result ALWAYS_INLINE Detach(ams::svc::DeviceName device_name) { return ams::kern::svc::ResultNotImplemented(); }
+
+            Result ALWAYS_INLINE Map(size_t *out_mapped_size, const KPageGroup &pg, KDeviceVirtualAddress device_address, ams::svc::MemoryPermission device_perm, bool refresh_mappings) { return ams::kern::svc::ResultNotImplemented(); }
+            Result ALWAYS_INLINE Unmap(const KPageGroup &pg, KDeviceVirtualAddress device_address) { return ams::kern::svc::ResultNotImplemented(); }
+        public:
+            static ALWAYS_INLINE void Initialize() { /* ... */ }
+
+            static ALWAYS_INLINE void Lock() { /* ... */ }
+            static ALWAYS_INLINE void Unlock() { /* ... */ }
+            static ALWAYS_INLINE void Sleep() { /* ... */ }
+            static ALWAYS_INLINE void Wakeup() { /* ... */ }
+    };
+
+}
\ No newline at end of file
diff --git a/libraries/libmesosphere/include/mesosphere/kern_select_device_page_table.hpp b/libraries/libmesosphere/include/mesosphere/kern_select_device_page_table.hpp
index 51e4db302..6557c991e 100644
--- a/libraries/libmesosphere/include/mesosphere/kern_select_device_page_table.hpp
+++ b/libraries/libmesosphere/include/mesosphere/kern_select_device_page_table.hpp
@@ -24,5 +24,10 @@
     }
 
 #else
-    #error "Unknown board for KDevicePageTable"
+    #include <mesosphere/board/generic/kern_k_device_page_table.hpp>
+
+    namespace ams::kern {
+        using ams::kern::board::generic::KDevicePageTable;
+    }
+
 #endif
diff --git a/libraries/libvapours/include/vapours/svc/board/generic/svc_device_name.hpp b/libraries/libvapours/include/vapours/svc/board/generic/svc_device_name.hpp
new file mode 100644
index 000000000..4de1ba2bd
--- /dev/null
+++ b/libraries/libvapours/include/vapours/svc/board/generic/svc_device_name.hpp
@@ -0,0 +1,26 @@
+/*
+ * 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::board::generic {
+
+    enum DeviceName {
+        /* If there is no smmu, there are no device names. */
+        DeviceName_Count = 0,
+    };
+
+}
diff --git a/libraries/libvapours/include/vapours/svc/svc_select_device_name.hpp b/libraries/libvapours/include/vapours/svc/svc_select_device_name.hpp
index 5435c6b93..5db94155c 100644
--- a/libraries/libvapours/include/vapours/svc/svc_select_device_name.hpp
+++ b/libraries/libvapours/include/vapours/svc/svc_select_device_name.hpp
@@ -26,6 +26,9 @@
 
 #else
 
-    #error "Unknown board for svc::DeviceName"
+    #include <vapours/svc/board/generic/svc_device_name.hpp>
+    namespace ams::svc {
+        using namespace ams::svc::board::generic;
+    }
 
 #endif