mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 03:22:43 +00:00
d6e122fd3a
For that, we have a new type of VMObject, called ContiguousVMObject, that is responsible for allocating contiguous physical pages.
66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
/*
|
|
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <Kernel/VM/ContiguousVMObject.h>
|
|
#include <Kernel/VM/MemoryManager.h>
|
|
#include <Kernel/VM/PhysicalPage.h>
|
|
|
|
namespace Kernel {
|
|
|
|
//#define CONTIGUOUS_VMOBJECT_DEBUG
|
|
|
|
NonnullRefPtr<ContiguousVMObject> ContiguousVMObject::create_with_size(size_t size)
|
|
{
|
|
return adopt(*new ContiguousVMObject(size));
|
|
}
|
|
|
|
ContiguousVMObject::ContiguousVMObject(size_t size)
|
|
: VMObject(size)
|
|
{
|
|
auto contiguous_physical_pages = MM.allocate_contiguous_supervisor_physical_pages(size);
|
|
for (size_t i = 0; i < page_count(); i++) {
|
|
physical_pages()[i] = contiguous_physical_pages[i];
|
|
#ifdef CONTIGUOUS_VMOBJECT_DEBUG
|
|
dbg() << "Contiguous page[" << i << "]: " << physical_pages()[i]->paddr();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
ContiguousVMObject::ContiguousVMObject(const ContiguousVMObject& other)
|
|
: VMObject(other)
|
|
{
|
|
}
|
|
|
|
ContiguousVMObject::~ContiguousVMObject()
|
|
{
|
|
}
|
|
|
|
NonnullRefPtr<VMObject> ContiguousVMObject::clone()
|
|
{
|
|
ASSERT_NOT_REACHED();
|
|
}
|
|
|
|
}
|