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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/**
* Copyright (C) 2013 Akiru Emulator
*
* @file mem_map.cpp
* @author ShizZy <shizzy247@gmail.com>
* @date 2013-09-05
* @brief Memory map - handles virtual to physical memory access
*
* @section LICENSE
* This program 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 2 of
* the License, or (at your option) any later version.
*
* This program 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 at
* http://www.gnu.org/copyleft/gpl.html
*
* Official project repository can be found at:
* http://code.google.com/p/gekko-gc-emu/
*/
#include "common.h"
#include "mem_arena.h"
#include "mem_map.h"
#include "core.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
namespace Memory {
u8* g_mem_base = NULL; ///< The base pointer to the auto-mirrored arena.
MemArena g_mem_arena; ///< The MemArena class
u8* g_fcram = NULL; ///< Main memory (FCRAM) pointer
u8* g_vram = NULL; ///< Video memory (VRAM) pointer
u8* g_physical_fcram = NULL; ///< Main physical memory (FCRAM)
u8* g_physical_vram = NULL; ///< Video physical memory (VRAM)
// We don't declare the IO region in here since its handled by other means.
static MemoryView g_mem_views[] =
{
{NULL, NULL, 0x00000000, MEM_BOOTROM_SIZE, 0},
{NULL, NULL, 0x00010000, MEM_BOOTROM_SIZE, MV_MIRROR_PREVIOUS},
{NULL, NULL, 0x17E00000, MEM_MPCORE_PRIV_SIZE, 0},
{&g_vram, &g_physical_vram, 0x18000000, MEM_VRAM_SIZE, 0},
{NULL, NULL, 0x1FF00000, MEM_DSP_SIZE, 0},
{NULL, NULL, 0x1FF80000, MEM_AXI_WRAM_SIZE, 0},
{&g_ram, &g_physical_fcram, 0x20000000, MEM_FCRAM_SIZE, MV_IS_PRIMARY_RAM},
};
static const int kNumMemViews = sizeof(g_mem_views) / sizeof(MemoryView); ///< Number of mem views
u8 Read8(const u32 addr) {
return 0xDE;
}
u16 Read16(const u32 addr) {
return 0xDEAD;
}
u32 Read32(const u32 addr) {
return 0xDEADBEEF;
}
void Write8(const u32 addr, const u32 data) {
}
void Write16(const u32 addr, const u32 data) {
}
void Write32(const u32 addr, const u32 data) {
}
void Init() {
int flags = 0;
for (size_t i = 0; i < ARRAY_SIZE(g_mem_views); i++) {
if (g_mem_views[i].flags & MV_IS_PRIMARY_RAM)
g_mem_views[i].size = MEMORY_SIZE;
}
g_base = MemoryMap_Setup(g_mem_views, kNumMemViews, flags, &g_mem_arena);
INFO_LOG(MEMMAP, "Memory system initialized. RAM at %p (mirror at 0 @ %p)", g_fcram,
g_physical_fcram);
}
void Shutdown() {
u32 flags = 0;
MemoryMap_Shutdown(g_mem_views, kNumMemViews, flags, &g_mem_arena);
g_mem_arena.ReleaseSpace();
g_mem_base = NULL;
INFO_LOG(MEMMAP, "Memory system shut down.");
}
} // namespace
|
