yuzu/src/core/src/mem_map.cpp

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/**
* Copyright (C) 2014 Citra 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/
*/
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#include "common.h"
#include "mem_arena.h"
#include "mem_map.h"
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#include "core.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
namespace Memory {
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u8* g_base = NULL; ///< The base pointer to the auto-mirrored arena.
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MemArena g_arena; ///< The MemArena class
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u8* g_bootrom = NULL; ///< Bootrom memory (super secret code/data @ 0x8000) pointer
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u8* g_fcram = NULL; ///< Main memory (FCRAM) pointer
u8* g_vram = NULL; ///< Video memory (VRAM) pointer
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u8* g_physical_bootrom = NULL; ///< Bootrom physical memory (super secret code/data @ 0x8000)
u8* g_uncached_bootrom = NULL;
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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.
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static MemoryView g_views[] =
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{
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{&g_bootrom, &g_physical_bootrom, 0x00000000, MEM_BOOTROM_SIZE, 0},
{NULL, &g_uncached_bootrom, 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_fcram, &g_physical_fcram, 0x20000000, MEM_FCRAM_SIZE, MV_IS_PRIMARY_RAM},
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};
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/*static MemoryView views[] =
{
{&m_pScratchPad, &m_pPhysicalScratchPad, 0x00010000, SCRATCHPAD_SIZE, 0},
{NULL, &m_pUncachedScratchPad, 0x40010000, SCRATCHPAD_SIZE, MV_MIRROR_PREVIOUS},
{&m_pVRAM, &m_pPhysicalVRAM, 0x04000000, 0x00800000, 0},
{NULL, &m_pUncachedVRAM, 0x44000000, 0x00800000, MV_MIRROR_PREVIOUS},
{&m_pRAM, &m_pPhysicalRAM, 0x08000000, g_MemorySize, MV_IS_PRIMARY_RAM}, // only from 0x08800000 is it usable (last 24 megs)
{NULL, &m_pUncachedRAM, 0x48000000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_PRIMARY_RAM},
{NULL, &m_pKernelRAM, 0x88000000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_PRIMARY_RAM},
// TODO: There are a few swizzled mirrors of VRAM, not sure about the best way to
// implement those.
};*/
static const int kNumMemViews = sizeof(g_views) / sizeof(MemoryView); ///< Number of mem views
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void Init() {
int flags = 0;
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for (size_t i = 0; i < ARRAY_SIZE(g_views); i++) {
if (g_views[i].flags & MV_IS_PRIMARY_RAM)
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g_views[i].size = MEM_FCRAM_SIZE;
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}
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g_base = MemoryMap_Setup(g_views, kNumMemViews, flags, &g_arena);
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NOTICE_LOG(MEMMAP, "Memory system initialized. RAM at %p (mirror at 0 @ %p)", g_fcram,
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g_physical_fcram);
}
void Shutdown() {
u32 flags = 0;
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MemoryMap_Shutdown(g_views, kNumMemViews, flags, &g_arena);
g_arena.ReleaseSpace();
g_base = NULL;
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NOTICE_LOG(MEMMAP, "Memory system shut down.");
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}
} // namespace