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sortix--sortix/sortix/memorymanagement.h

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/******************************************************************************
COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along
with Sortix. If not, see <http://www.gnu.org/licenses/>.
memorymanagement.h
Functions that allow modification of virtual memory.
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******************************************************************************/
#ifndef SORTIX_MEMORYMANAGEMENT_H
#define SORTIX_MEMORYMANAGEMENT_H
// Forward declarations.
typedef struct multiboot_info multiboot_info_t;
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namespace Sortix
{
namespace Page
{
addr_t Get();
void Put(addr_t page);
// Rounds a memory address down to nearest page.
inline addr_t AlignDown(addr_t page) { return page & ~(0xFFFUL); }
// Rounds a memory address up to nearest page.
inline addr_t AlignUp(addr_t page) { return AlignDown(page + 0xFFFUL); }
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}
namespace Memory
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{
void Init(multiboot_info_t* bootinfo);
void InvalidatePage(addr_t addr);
void Flush();
addr_t Fork();
addr_t SwitchAddressSpace(addr_t addrspace);
void DestroyAddressSpace();
bool MapRangeKernel(addr_t where, size_t bytes);
void UnmapRangeKernel(addr_t where, size_t bytes);
bool MapRangeUser(addr_t where, size_t bytes);
void UnmapRangeUser(addr_t where, size_t bytes);
bool MapKernel(addr_t physical, addr_t mapto);
bool MapUser(addr_t physical, addr_t mapto);
addr_t UnmapKernel(addr_t mapto);
addr_t UnmapUser(addr_t mapto);
void Statistics(size_t* amountused, size_t* totalmem);
addr_t GetKernelStack();
size_t GetKernelStackSize();
addr_t GetInitRD();
size_t GetInitRDSize();
void RegisterInitRDSize(size_t size);
addr_t GetHeapLower();
addr_t GetHeapUpper();
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}
}
#endif