blob: 791cf3d43da257edca375b7352f9788e6c445b91 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/OwnPtr.h>
#include <Kernel/Memory/Region.h>
#include <Kernel/PhysicalAddress.h>
namespace Kernel::Memory {
class MappedROM {
public:
const u8* base() const { return region->vaddr().offset(offset).as_ptr(); }
const u8* end() const { return base() + size; }
OwnPtr<Region> region;
size_t size { 0 };
size_t offset { 0 };
PhysicalAddress paddr;
Optional<PhysicalAddress> find_chunk_starting_with(StringView prefix, size_t chunk_size) const
{
for (auto* candidate = base(); candidate < end(); candidate += chunk_size) {
if (!__builtin_memcmp(prefix.characters_without_null_termination(), candidate, prefix.length()))
return paddr_of(candidate);
}
return {};
}
PhysicalAddress paddr_of(const u8* ptr) const { return paddr.offset(ptr - this->base()); }
};
}
|
