71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#pragma once
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#include "common/common.h"
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// This class lets you create a block of anonymous RAM, and then arbitrarily map views into it.
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// Multiple views can mirror the same section of the block, which makes it very convient for emulating
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// memory mirrors.
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class MemArena
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{
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public:
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void GrabLowMemSpace(size_t size);
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void ReleaseSpace();
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void *CreateView(s64 offset, size_t size, void *base = 0);
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void ReleaseView(void *view, size_t size);
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// This only finds 1 GB in 32-bit
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static u8 *Find4GBBase();
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private:
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#ifdef _WIN32
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HANDLE hMemoryMapping;
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#else
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int fd;
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#endif
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};
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enum {
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MV_MIRROR_PREVIOUS = 1,
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// MV_FAKE_VMEM = 2,
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// MV_WII_ONLY = 4,
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MV_IS_PRIMARY_RAM = 0x100,
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MV_IS_EXTRA1_RAM = 0x200,
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MV_IS_EXTRA2_RAM = 0x400,
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};
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struct MemoryView
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{
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u8 **out_ptr_low;
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u8 **out_ptr;
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u32 virtual_address;
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u32 size;
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u32 flags;
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};
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// Uses a memory arena to set up an emulator-friendly memory map according to
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// a passed-in list of MemoryView structures.
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u8 *MemoryMap_Setup(const MemoryView *views, int num_views, u32 flags, MemArena *arena);
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void MemoryMap_Shutdown(const MemoryView *views, int num_views, u32 flags, MemArena *arena);
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