7b6a7d7dfb
This cleans up the mess that address reading/writing had become and makes the code a *lot* more sensible. This adds a physical<->virtual address converter to mem_map.h. For further accuracy, we will want to properly extend this to support a wider range of address regions. For now, this makes simply homebrew applications work in a good manner though.
89 lines
3.9 KiB
C++
89 lines
3.9 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#include "common/common.h"
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#include "common/mem_arena.h"
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#include "core/mem_map.h"
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#include "core/core.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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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_exefs_code = NULL; ///< ExeFS:/.code is loaded here
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u8* g_system_mem = NULL; ///< System memory
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u8* g_heap = NULL; ///< Application heap (main memory)
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u8* g_heap_gsp = NULL; ///< GSP heap (main memory)
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u8* g_vram = NULL; ///< Video memory (VRAM) pointer
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u8* g_shared_mem = NULL; ///< Shared memory
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u8* g_kernel_mem; ///< Kernel memory
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u8* g_physical_bootrom = NULL; ///< Bootrom physical memory
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u8* g_uncached_bootrom = NULL;
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u8* g_physical_exefs_code = NULL; ///< Phsical ExeFS:/.code is loaded here
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u8* g_physical_system_mem = NULL; ///< System physical memory
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u8* g_physical_fcram = NULL; ///< Main physical memory (FCRAM)
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u8* g_physical_heap_gsp = NULL; ///< GSP heap physical memory
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u8* g_physical_vram = NULL; ///< Video physical memory (VRAM)
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u8* g_physical_shared_mem = NULL; ///< Physical shared memory
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u8* g_physical_kernel_mem; ///< Kernel memory
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// 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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{&g_exefs_code, &g_physical_exefs_code, EXEFS_CODE_VADDR, EXEFS_CODE_SIZE, 0},
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{&g_vram, &g_physical_vram, VRAM_VADDR, VRAM_SIZE, 0},
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{&g_heap, &g_physical_fcram, HEAP_VADDR, HEAP_SIZE, MV_IS_PRIMARY_RAM},
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{&g_shared_mem, &g_physical_shared_mem, SHARED_MEMORY_VADDR, SHARED_MEMORY_SIZE, 0},
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{&g_system_mem, &g_physical_system_mem, SYSTEM_MEMORY_VADDR, SYSTEM_MEMORY_SIZE, 0},
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{&g_kernel_mem, &g_physical_kernel_mem, KERNEL_MEMORY_VADDR, KERNEL_MEMORY_SIZE, 0},
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{&g_heap_gsp, &g_physical_heap_gsp, HEAP_GSP_VADDR, HEAP_GSP_SIZE, 0},
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};
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/*static MemoryView views[] =
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{
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{&m_pScratchPad, &m_pPhysicalScratchPad, 0x00010000, SCRATCHPAD_SIZE, 0},
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{NULL, &m_pUncachedScratchPad, 0x40010000, SCRATCHPAD_SIZE, MV_MIRROR_PREVIOUS},
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{&m_pVRAM, &m_pPhysicalVRAM, 0x04000000, 0x00800000, 0},
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{NULL, &m_pUncachedVRAM, 0x44000000, 0x00800000, MV_MIRROR_PREVIOUS},
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{&m_pRAM, &m_pPhysicalRAM, 0x08000000, g_MemorySize, MV_IS_PRIMARY_RAM}, // only from 0x08800000 is it usable (last 24 megs)
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{NULL, &m_pUncachedRAM, 0x48000000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_PRIMARY_RAM},
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{NULL, &m_pKernelRAM, 0x88000000, g_MemorySize, MV_MIRROR_PREVIOUS | MV_IS_PRIMARY_RAM},
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// TODO: There are a few swizzled mirrors of VRAM, not sure about the best way to
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// implement those.
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};*/
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static const int kNumMemViews = sizeof(g_views) / sizeof(MemoryView); ///< Number of mem views
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void Init() {
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int flags = 0;
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for (size_t i = 0; i < ARRAY_SIZE(g_views); i++) {
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if (g_views[i].flags & MV_IS_PRIMARY_RAM)
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g_views[i].size = 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, "initialized OK, RAM at %p (mirror at 0 @ %p)", g_heap,
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g_physical_fcram);
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}
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void Shutdown() {
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u32 flags = 0;
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MemoryMap_Shutdown(g_views, kNumMemViews, flags, &g_arena);
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g_arena.ReleaseSpace();
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g_base = NULL;
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NOTICE_LOG(MEMMAP, "shutdown OK");
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}
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} // namespace
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