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SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/StringView.h>
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#include <Kernel/VM/MemoryManager.h>
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namespace Kernel {
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template<typename T>
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struct TypedMapping {
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const T* ptr() const { return reinterpret_cast<const T*>(region->vaddr().offset(offset).as_ptr()); }
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T* ptr() { return reinterpret_cast<T*>(region->vaddr().offset(offset).as_ptr()); }
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const T* operator->() const { return ptr(); }
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T* operator->() { return ptr(); }
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const T& operator*() const { return *ptr(); }
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T& operator*() { return *ptr(); }
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OwnPtr<Region> region;
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size_t offset { 0 };
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};
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template<typename T>
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static TypedMapping<T> map_typed(PhysicalAddress paddr, size_t length, Region::Access access = Region::Access::Read)
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{
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TypedMapping<T> table;
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table.region = MM.allocate_kernel_region(paddr.page_base(), page_round_up(length), {}, access);
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table.offset = paddr.offset_in_page();
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return table;
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}
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template<typename T>
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static TypedMapping<T> map_typed(PhysicalAddress paddr)
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{
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return map_typed<T>(paddr, sizeof(T));
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}
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template<typename T>
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static TypedMapping<T> map_typed_writable(PhysicalAddress paddr)
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{
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return map_typed<T>(paddr, sizeof(T), Region::Access::Read | Region::Access::Write);
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}
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}
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