48 lines
1.8 KiB
C++
48 lines
1.8 KiB
C++
/*
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* Kernel Memory Management
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*
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* Copyright (C) 2009-2011 Udo Steinberg <udo@hypervisor.org>
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* Economic rights: Technische Universitaet Dresden (Germany)
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*
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* Copyright (C) 2012-2013 Udo Steinberg, Intel Corporation.
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* Copyright (C) 2019-2025 Udo Steinberg, BlueRock Security, Inc.
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*
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* This file is part of the NOVA microhypervisor.
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*
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* NOVA is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* NOVA is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License version 2 for more details.
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*/
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#pragma once
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#include "compiler.hpp"
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#include "memory.hpp"
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#include "types.hpp"
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class Kmem final
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{
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private:
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static inline constinit uintptr_t offset asm ("__kmem_offset") { 0 };
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static auto phys_to_virt (uintptr_t p) { return p + offset; }
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static auto virt_to_phys (uintptr_t v) { return v - offset; }
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public:
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static auto sym_to_virt (void const *p) { return reinterpret_cast<uintptr_t>(p) + OFFSET; }
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static auto sym_to_phys (void const *p) { return virt_to_phys (sym_to_virt (p)); }
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static auto ptr_to_phys (void const *p) { return virt_to_phys (reinterpret_cast<uintptr_t>(p)); }
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static auto phys_to_ptr (uintptr_t p) { return reinterpret_cast<void *>(phys_to_virt (p)); }
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// Convert CPULOCAL pointer to global alias pointer
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template<typename T> NONNULL static auto loc_to_glb (cpu_t cpu, T *p)
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{
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return reinterpret_cast<T *>(reinterpret_cast<uintptr_t>(p) - MMAP_CPU_DATA + MMAP_GLB_CPUS + cpu * PAGE_SIZE (0));
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}
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};
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