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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#ifndef _MEMARENA_H_
#define _MEMARENA_H_
#ifdef _WIN32
#include <windows.h>
#endif
#include "common.h"
// This class lets you create a block of anonymous RAM, and then arbitrarily map views into it.
// Multiple views can mirror the same section of the block, which makes it very convenient for emulating
// memory mirrors.
class MemArena
{
public:
void GrabLowMemSpace(size_t size);
void ReleaseSpace();
void *CreateView(s64 offset, size_t size, void *base = nullptr);
void ReleaseView(void *view, size_t size);
// This only finds 1 GB in 32-bit
static u8 *Find4GBBase();
private:
#ifdef _WIN32
HANDLE hMemoryMapping;
#else
int fd;
#endif
};
enum {
MV_MIRROR_PREVIOUS = 1,
MV_FAKE_VMEM = 2,
MV_WII_ONLY = 4,
};
struct MemoryView
{
u8 **out_ptr_low;
u8 **out_ptr;
u32 virtual_address;
u32 size;
u32 flags;
};
// Uses a memory arena to set up an emulator-friendly memory map according to
// a passed-in list of MemoryView structures.
u8 *MemoryMap_Setup(const MemoryView *views, int num_views, u32 flags, MemArena *arena);
void MemoryMap_Shutdown(const MemoryView *views, int num_views, u32 flags, MemArena *arena);
#endif // _MEMARENA_H_
|
