os: add tentative IoRegionType

libraries/libstratosphere/include/stratosphere/os.hpp

@@ -49,4 +49,5 @@
 #include <stratosphere/os/os_light_message_queue.hpp>
 #include <stratosphere/os/os_light_semaphore.hpp>
 #include <stratosphere/os/os_barrier.hpp>
+#include <stratosphere/os/os_io_region.hpp>
 #include <stratosphere/os/os_waitable.hpp>

libraries/libstratosphere/include/stratosphere/os/os_io_region.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.hpp>
+#include <stratosphere/os/os_io_region_types.hpp>
+#include <stratosphere/os/os_io_region_api.hpp>
+
+namespace ams::os {
+
+    /* TODO: class IoRegion ? */
+
+}

libraries/libstratosphere/include/stratosphere/os/os_io_region_api.hpp

@@ -0,0 +1,36 @@
+/*
+ * 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.hpp>
+#include <stratosphere/os/os_memory_permission.hpp>
+
+namespace ams::os {
+
+    struct IoRegionType;
+
+    Result CreateIoRegion(IoRegionType *io_region, Handle io_pool_handle, uintptr_t address, size_t size, MemoryMapping mapping, MemoryPermission permission);
+
+    void AttachIoRegion(IoRegionType *io_region, size_t size, Handle handle, bool managed);
+
+    void DestroyIoRegion(IoRegionType *io_region);
+
+    Handle GetIoRegionHandle(const IoRegionType *io_region);
+
+    Result MapIoRegion(void **out, IoRegionType *io_region, MemoryPermission perm);
+    void UnmapIoRegion(IoRegionType *io_region);
+
+}

libraries/libstratosphere/include/stratosphere/os/os_io_region_types.hpp

@@ -0,0 +1,40 @@
+/*
+ * 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.hpp>
+#include <stratosphere/os/impl/os_internal_critical_section.hpp>
+
+namespace ams::os {
+
+    struct IoRegionType {
+        enum State {
+            State_NotInitialized = 0,
+            State_Initialized    = 1,
+            State_Mapped         = 2,
+        };
+
+        Handle handle;
+        u8 state;
+        size_t size;
+        void *mapped_address;
+        bool handle_managed;
+
+        mutable impl::InternalCriticalSectionStorage cs_io_region;
+    };
+    static_assert(std::is_trivial<IoRegionType>::value);
+
+}

libraries/libstratosphere/include/stratosphere/os/os_memory_common.hpp

@@ -30,4 +30,7 @@ namespace ams::os {
         MemoryPermission_ReadWrite = MemoryPermission_ReadOnly | MemoryPermission_WriteOnly,
     };
 
+    using MemoryMapping = svc::MemoryMapping;
+    using enum svc::MemoryMapping;
+
 }