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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Leon Albrecht <leon2002.la@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Error.h>
#include <Kernel/VirtualAddress.h>
namespace Kernel::Memory {
class VirtualRange {
public:
VirtualRange() = delete;
VirtualRange(VirtualAddress base, size_t size)
: m_base(base)
, m_size(size)
{
}
VirtualAddress base() const { return m_base; }
size_t size() const { return m_size; }
bool is_valid() const { return !m_base.is_null(); }
bool contains(VirtualAddress vaddr) const { return vaddr >= base() && vaddr < end(); }
VirtualAddress end() const { return m_base.offset(m_size); }
bool operator==(VirtualRange const& other) const
{
return m_base == other.m_base && m_size == other.m_size;
}
bool contains(VirtualAddress base, size_t size) const
{
if (base.offset(size) < base)
return false;
return base >= m_base && base.offset(size) <= end();
}
bool contains(VirtualRange const& other) const
{
return contains(other.base(), other.size());
}
Vector<VirtualRange, 2> carve(VirtualRange const&) const;
VirtualRange intersect(VirtualRange const&) const;
bool intersects(VirtualRange const&) const;
static ErrorOr<VirtualRange> expand_to_page_boundaries(FlatPtr address, size_t size);
private:
VirtualAddress m_base;
size_t m_size { 0 };
};
}
template<>
struct AK::Formatter<Kernel::Memory::VirtualRange> : Formatter<FormatString> {
ErrorOr<void> format(FormatBuilder& builder, Kernel::Memory::VirtualRange value)
{
return Formatter<FormatString>::format(builder, "{} - {} (size {:p})"sv, value.base().as_ptr(), value.base().offset(value.size() - 1).as_ptr(), value.size());
}
};
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