mirror of https://github.com/yuzu-emu/yuzu.git
103 lines
3.4 KiB
C++
103 lines
3.4 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <cinttypes>
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#include <map>
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#include <memory>
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#include <utility>
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#include <vector>
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "core/hle/config_mem.h"
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#include "core/hle/kernel/memory.h"
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#include "core/hle/kernel/vm_manager.h"
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#include "core/hle/result.h"
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#include "core/hle/shared_page.h"
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#include "core/memory.h"
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#include "core/memory_setup.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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namespace Kernel {
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MemoryRegionInfo memory_regions[3];
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/// Size of the APPLICATION, SYSTEM and BASE memory regions (respectively) for each system
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/// memory configuration type.
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static const u32 memory_region_sizes[8][3] = {
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// Old 3DS layouts
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{0x04000000, 0x02C00000, 0x01400000}, // 0
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{/* This appears to be unused. */}, // 1
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{0x06000000, 0x00C00000, 0x01400000}, // 2
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{0x05000000, 0x01C00000, 0x01400000}, // 3
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{0x04800000, 0x02400000, 0x01400000}, // 4
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{0x02000000, 0x04C00000, 0x01400000}, // 5
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// New 3DS layouts
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{0x07C00000, 0x06400000, 0x02000000}, // 6
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{0x0B200000, 0x02E00000, 0x02000000}, // 7
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};
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void MemoryInit(u32 mem_type) {
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// TODO(yuriks): On the n3DS, all o3DS configurations (<=5) are forced to 6 instead.
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ASSERT_MSG(mem_type <= 5, "New 3DS memory configuration aren't supported yet!");
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ASSERT(mem_type != 1);
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// The kernel allocation regions (APPLICATION, SYSTEM and BASE) are laid out in sequence, with
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// the sizes specified in the memory_region_sizes table.
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VAddr base = 0;
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for (int i = 0; i < 3; ++i) {
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memory_regions[i].base = base;
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memory_regions[i].size = memory_region_sizes[mem_type][i];
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memory_regions[i].used = 0;
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memory_regions[i].linear_heap_memory = std::make_shared<std::vector<u8>>();
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// Reserve enough space for this region of FCRAM.
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// We do not want this block of memory to be relocated when allocating from it.
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memory_regions[i].linear_heap_memory->reserve(memory_regions[i].size);
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base += memory_regions[i].size;
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}
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// We must've allocated the entire FCRAM by the end
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ASSERT(base == Memory::FCRAM_SIZE);
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using ConfigMem::config_mem;
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config_mem.app_mem_type = mem_type;
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// app_mem_malloc does not always match the configured size for memory_region[0]: in case the
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// n3DS type override is in effect it reports the size the game expects, not the real one.
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config_mem.app_mem_alloc = memory_region_sizes[mem_type][0];
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config_mem.sys_mem_alloc = static_cast<u32_le>(memory_regions[1].size);
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config_mem.base_mem_alloc = static_cast<u32_le>(memory_regions[2].size);
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}
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void MemoryShutdown() {
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for (auto& region : memory_regions) {
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region.base = 0;
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region.size = 0;
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region.used = 0;
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region.linear_heap_memory = nullptr;
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}
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}
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MemoryRegionInfo* GetMemoryRegion(MemoryRegion region) {
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switch (region) {
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case MemoryRegion::APPLICATION:
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return &memory_regions[0];
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case MemoryRegion::SYSTEM:
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return &memory_regions[1];
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case MemoryRegion::BASE:
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return &memory_regions[2];
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default:
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UNREACHABLE();
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}
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}
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void HandleSpecialMapping(VMManager& address_space, const AddressMapping& mapping) {}
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void MapSharedPages(VMManager& address_space) {}
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} // namespace Kernel
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