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Kernel/Memory: Introduce a method to allocate TypedMapping on the heap

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This will be used later on to allocate such structure on the heap when
it is necessary to do so.
This commit is contained in:
Liav A 2022-09-23 14:47:16 +03:00 • committed by Linus Groh
parent fe2bd8e3dd
commit 6bafbd64e2
1 changed files with 13 additions and 0 deletions
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13
Kernel/Memory/TypedMapping.h
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@ -6,7 +6,9 @@
#pragma once
#include <AK/NonnullOwnPtr.h>
#include <AK/StringView.h>
#include <AK/Try.h>
#include <Kernel/Memory/MemoryManager.h>
namespace Kernel::Memory {
@ -24,6 +26,17 @@ struct TypedMapping {
size_t offset { 0 };
};
template<typename T>
static ErrorOr<NonnullOwnPtr<TypedMapping<T>>> adopt_new_nonnull_own_typed_mapping(PhysicalAddress paddr, size_t length, Region::Access access = Region::Access::Read)
{
auto mapping_length = TRY(page_round_up(paddr.offset_in_page() + length));
auto region = TRY(MM.allocate_kernel_region(paddr.page_base(), mapping_length, {}, access));
auto table = TRY(adopt_nonnull_own_or_enomem(new (nothrow) Memory::TypedMapping<T>()));
table->region = move(region);
table->offset = paddr.offset_in_page();
return table;
}
template<typename T>
static ErrorOr<TypedMapping<T>> map_typed(PhysicalAddress paddr, size_t length, Region::Access access = Region::Access::Read)
{