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66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
/******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along
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with Sortix. If not, see <http://www.gnu.org/licenses/>.
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memorymanagement.h
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Handles memory for the x86 architecture.
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******************************************************************************/
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#ifndef SORTIX_MEMORYMANAGEMENT_H
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#define SORTIX_MEMORYMANAGEMENT_H
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namespace Sortix
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{
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namespace Page
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{
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#ifdef MULTIBOOT_HEADER
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void Init(multiboot_info_t* BootInfo);
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#endif
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addr_t Get();
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void Put(addr_t Page);
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inline addr_t AlignDown(addr_t page) { return page & ~(0xFFFUL); }
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inline addr_t AlignUp(addr_t page) { return AlignDown(page + 0xFFFUL); }
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}
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namespace VirtualMemory
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{
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void Init();
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void Flush();
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addr_t CreateAddressSpace();
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addr_t SwitchAddressSpace(addr_t addrspace);
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void MapKernel(addr_t where, addr_t physical);
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bool MapUser(addr_t where, addr_t physical);
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addr_t UnmapKernel(addr_t where);
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addr_t UnmapUser(addr_t where);
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#ifdef PLATFORM_X86
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const addr_t heapLower = 0x80000000UL;
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const addr_t heapUpper = 0xFF800000UL;
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// Physical pages may be safely temporarily mapped to this address and a
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// good dozen of pages onwards. Beware that this is only meant to be temporary.
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const addr_t tempaddr = 0xFF800000UL;
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#endif
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}
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}
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#endif
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