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Atmosphere/libraries/libmesosphere/include/mesosphere/kern_k_io_region.hpp
2023-02-22 17:19:51 -08:00

93 lines
3.9 KiB
C++

/*
* Copyright (c) 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_auto_object.hpp>
#include <mesosphere/kern_slab_helpers.hpp>
namespace ams::kern {
class KProcess;
class KIoPool;
class KIoRegion final : public KAutoObjectWithSlabHeapAndContainer<KIoRegion, KAutoObjectWithList>, public util::IntrusiveRedBlackTreeBaseNode<KIoRegion> {
MESOSPHERE_AUTOOBJECT_TRAITS(KIoRegion, KAutoObject);
private:
friend class KProcess;
friend class KIoPool;
public:
using RedBlackKeyType = KPhysicalAddress;
static constexpr ALWAYS_INLINE RedBlackKeyType GetRedBlackKey(const RedBlackKeyType &v) { return v; }
static constexpr ALWAYS_INLINE RedBlackKeyType GetRedBlackKey(const KIoRegion &v) { return v.GetAddress(); }
template<typename T> requires (std::same_as<T, KIoRegion> || std::same_as<T, RedBlackKeyType>)
static constexpr ALWAYS_INLINE int Compare(const T &lhs, const KIoRegion &rhs) {
const RedBlackKeyType lval = GetRedBlackKey(lhs);
const RedBlackKeyType rval = GetRedBlackKey(rhs);
if (lval < rval) {
return -1;
} else if (lval == rval) {
return 0;
} else {
return 1;
}
}
private:
KLightLock m_lock;
KIoPool *m_pool;
KPhysicalAddress m_physical_address;
size_t m_size;
ams::svc::MemoryMapping m_mapping;
ams::svc::MemoryPermission m_permission;
bool m_is_initialized;
bool m_is_mapped;
util::IntrusiveListNode m_process_list_node;
public:
explicit KIoRegion() : m_pool(nullptr), m_is_initialized(false) { /* ... */ }
Result Initialize(KIoPool *pool, KPhysicalAddress phys_addr, size_t size, ams::svc::MemoryMapping mapping, ams::svc::MemoryPermission perm);
void Finalize();
bool IsInitialized() const { return m_is_initialized; }
static void PostDestroy(uintptr_t arg) { MESOSPHERE_UNUSED(arg); /* ... */ }
Result Map(KProcessAddress address, size_t size, ams::svc::MemoryPermission map_perm);
Result Unmap(KProcessAddress address, size_t size);
constexpr bool Overlaps(KPhysicalAddress address, size_t size) const {
return m_physical_address <= (address + size - 1) && address <= (m_physical_address + m_size - 1);
}
constexpr ALWAYS_INLINE KPhysicalAddress GetAddress() const { return m_physical_address; }
constexpr ALWAYS_INLINE size_t GetSize() const { return m_size; }
constexpr uintptr_t GetHint() const {
/* TODO: Is this architecture specific? */
if (m_size >= 2_MB) {
return GetInteger(m_physical_address) & (2_MB - 1);
} else if (m_size >= 64_KB) {
return GetInteger(m_physical_address) & (64_KB - 1);
} else if (m_size >= 4_KB) {
return GetInteger(m_physical_address) & (4_KB - 1);
} else {
return 0;
}
}
};
}