mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-23 12:51:13 +00:00
480 lines
19 KiB
C++
480 lines
19 KiB
C++
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/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <exosphere.hpp>
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#include "fusee_emummc.hpp"
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#include "fusee_mmc.hpp"
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#include "fusee_sd_card.hpp"
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#include "fusee_fatal.hpp"
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#include "fusee_malloc.hpp"
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#include "fs/fusee_fs_api.hpp"
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#include "fs/fusee_fs_storage.hpp"
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namespace ams::nxboot {
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namespace {
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class SdCardStorage : public fs::IStorage {
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public:
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virtual Result Read(s64 offset, void *buffer, size_t size) override {
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if (!util::IsAligned(offset, sdmmc::SectorSize) || !util::IsAligned(size, sdmmc::SectorSize)) {
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ShowFatalError("SdCard: unaligned access to %" PRIx64 ", size=%" PRIx64"\n", static_cast<u64>(offset), static_cast<u64>(size));
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}
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return ReadSdCard(buffer, size, offset / sdmmc::SectorSize, size / sdmmc::SectorSize);
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}
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virtual Result Flush() override {
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return ResultSuccess();
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}
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virtual Result GetSize(s64 *out) override {
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u32 num_sectors;
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R_TRY(GetSdCardMemoryCapacity(std::addressof(num_sectors)));
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*out = num_sectors * sdmmc::SectorSize;
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return ResultSuccess();
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}
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virtual Result Write(s64 offset, const void *buffer, size_t size) override {
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return fs::ResultUnsupportedOperation();
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}
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virtual Result SetSize(s64 size) override {
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return fs::ResultUnsupportedOperation();
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}
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};
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template<sdmmc::MmcPartition Partition>
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class MmcPartitionStorage : public fs::IStorage {
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public:
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constexpr MmcPartitionStorage() { /* ... */ }
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virtual Result Read(s64 offset, void *buffer, size_t size) override {
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if (!util::IsAligned(offset, sdmmc::SectorSize) || !util::IsAligned(size, sdmmc::SectorSize)) {
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ShowFatalError("SdCard: unaligned access to %" PRIx64 ", size=%" PRIx64"\n", static_cast<u64>(offset), static_cast<u64>(size));
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}
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return ReadMmc(buffer, size, Partition, offset / sdmmc::SectorSize, size / sdmmc::SectorSize);
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}
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virtual Result Flush() override {
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return ResultSuccess();
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}
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virtual Result GetSize(s64 *out) override {
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u32 num_sectors;
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R_TRY(GetMmcMemoryCapacity(std::addressof(num_sectors), Partition));
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*out = num_sectors * sdmmc::SectorSize;
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return ResultSuccess();
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}
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virtual Result Write(s64 offset, const void *buffer, size_t size) override {
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return fs::ResultUnsupportedOperation();
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}
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virtual Result SetSize(s64 size) override {
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return fs::ResultUnsupportedOperation();
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}
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};
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using MmcBoot0Storage = MmcPartitionStorage<sdmmc::MmcPartition_BootPartition1>;
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using MmcUserStorage = MmcPartitionStorage<sdmmc::MmcPartition_UserData>;
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constinit char g_emummc_path[0x300];
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class EmummcFileStorage : public fs::IStorage {
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private:
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s64 m_file_size;
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fs::FileHandle m_handle;
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int m_id;
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int m_file_path_ofs;
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private:
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void SwitchFile(int id) {
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if (m_id != id) {
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fs::CloseFile(m_handle);
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/* Update path. */
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g_emummc_path[m_file_path_ofs + 1] = '0' + (id % 10);
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g_emummc_path[m_file_path_ofs + 0] = '0' + (id / 10);
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/* Open new file. */
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const Result result = fs::OpenFile(std::addressof(m_handle), g_emummc_path, fs::OpenMode_Read);
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if (R_FAILED(result)) {
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ShowFatalError("Failed to open emummc user %02d file: 0x%08" PRIx32 "!\n", id, result.GetValue());
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}
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m_id = id;
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}
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}
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public:
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EmummcFileStorage(fs::FileHandle user00, int ofs) : m_handle(user00), m_id(0), m_file_path_ofs(ofs) {
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const Result result = fs::GetFileSize(std::addressof(m_file_size), m_handle);
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if (R_FAILED(result)) {
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ShowFatalError("Failed to get emummc file size: 0x%08" PRIx32 "!\n", result.GetValue());
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}
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}
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virtual Result Read(s64 offset, void *buffer, size_t size) override {
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int file = offset / m_file_size;
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s64 subofs = offset % m_file_size;
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u8 *cur_dst = static_cast<u8 *>(buffer);
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for (/* ... */; size > 0; ++file) {
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/* Switch to the current file. */
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SwitchFile(file);
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/* Perform the current read. */
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const size_t cur_size = std::min<size_t>(m_file_size - subofs, size);
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R_TRY(fs::ReadFile(m_handle, subofs, cur_dst, cur_size));
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/* Advance. */
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cur_dst += cur_size;
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size -= cur_size;
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subofs = 0;
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}
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return ResultSuccess();
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}
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virtual Result Flush() override {
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return fs::FlushFile(m_handle);
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}
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virtual Result GetSize(s64 *out) override {
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return fs::ResultUnsupportedOperation();
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}
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virtual Result Write(s64 offset, const void *buffer, size_t size) override {
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return fs::ResultUnsupportedOperation();
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}
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virtual Result SetSize(s64 size) override {
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return fs::ResultUnsupportedOperation();
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}
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};
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constinit SdCardStorage g_sd_card_storage;
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constinit MmcBoot0Storage g_mmc_boot0_storage;
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constinit MmcUserStorage g_mmc_user_storage;
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constinit fs::IStorage *g_boot0_storage = nullptr;
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constinit fs::IStorage *g_user_storage = nullptr;
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class SystemPartitionStorage : public fs::IStorage {
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private:
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static constexpr size_t CacheEntries = BITSIZEOF(u32);
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static constexpr size_t SectorSize = 0x4000;
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private:
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fs::SubStorage m_storage;
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u8 *m_sector_cache;
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u32 *m_sector_ids;
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u32 m_sector_flags;
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u32 m_next_idx;
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private:
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Result LoadSector(u8 *sector, u32 sector_id) {
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/* Read the sector data. */
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R_TRY(m_storage.Read(static_cast<s64>(sector_id) * SectorSize, sector, SectorSize));
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/* Decrypt the sector. */
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se::DecryptAes128Xts(sector, SectorSize, pkg1::AesKeySlot_BootloaderSystem0, pkg1::AesKeySlot_BootloaderSystem1, sector, SectorSize, sector_id);
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/* Mark the sector as freshly loaded. */
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m_sector_flags &= ~(1u << (sector_id % CacheEntries));
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return ResultSuccess();
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}
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Result GetSector(u8 **out_sector, u32 sector_id) {
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/* Try to find in the cache. */
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for (size_t i = 0; i < CacheEntries; ++i) {
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if (m_sector_ids[i] == sector_id) {
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m_sector_flags &= ~(1u << i);
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*out_sector = m_sector_cache + SectorSize * i;
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return ResultSuccess();
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}
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}
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/* Find a sector to evict. */
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while ((m_sector_flags & (1u << m_next_idx)) == 0) {
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m_sector_flags |= (1u << m_next_idx);
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m_next_idx = (m_next_idx + 1) % CacheEntries;
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}
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/* Get the chosen sector. */
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*out_sector = m_sector_cache + SectorSize * m_next_idx;
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m_next_idx = (m_next_idx + 1) % CacheEntries;
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/* Load the sector. */
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return this->LoadSector(*out_sector, sector_id);
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}
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public:
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SystemPartitionStorage(s64 ofs, s64 size) : m_storage(*g_user_storage, ofs, size) {
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/* Allocate sector cache. */
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m_sector_cache = static_cast<u8 *>(AllocateAligned(CacheEntries * SectorSize, SectorSize));
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/* Allocate sector ids. */
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m_sector_ids = static_cast<u32 *>(AllocateAligned(CacheEntries * sizeof(u32), alignof(u32)));
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for (size_t i = 0; i < CacheEntries; ++i) {
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m_sector_ids[i] = std::numeric_limits<u32>::max();
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}
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/* All sectors are dirty. */
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m_sector_flags = ~0u;
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/* Next sector is 0. */
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m_next_idx = 0;
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}
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virtual Result Read(s64 offset, void *buffer, size_t size) override {
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u32 sector_id = offset / SectorSize;
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s64 subofs = offset % SectorSize;
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u8 *cur_dst = static_cast<u8 *>(buffer);
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while (size > 0) {
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/* Get the current sector. */
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u8 *sector;
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R_TRY(this->GetSector(std::addressof(sector), sector_id++));
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/* Copy the data. */
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const size_t cur_size = std::min<size_t>(SectorSize - subofs, size);
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std::memcpy(cur_dst, sector + subofs, cur_size);
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/* Advance. */
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cur_dst += cur_size;
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size -= cur_size;
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subofs = 0;
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}
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return ResultSuccess();
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}
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virtual Result Flush() override {
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return m_storage.Flush();
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}
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virtual Result GetSize(s64 *out) override {
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return m_storage.GetSize(out);
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}
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virtual Result Write(s64 offset, const void *buffer, size_t size) override {
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return fs::ResultUnsupportedOperation();
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}
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virtual Result SetSize(s64 size) override {
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return fs::ResultUnsupportedOperation();
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}
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};
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constinit SystemPartitionStorage *g_system_storage = nullptr;
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constinit fs::SubStorage *g_package2_storage = nullptr;
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struct Guid {
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u32 data1;
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u16 data2;
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u16 data3;
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u8 data4[8];
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};
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static_assert(sizeof(Guid) == 0x10);
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struct GptHeader {
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char signature[8];
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u32 revision;
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u32 header_size;
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u32 header_crc32;
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u32 reserved0;
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u64 my_lba;
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u64 alt_lba;
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u64 first_usable_lba;
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u64 last_usable_lba;
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Guid disk_guid;
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u64 partition_entry_lba;
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u32 number_of_partition_entries;
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u32 size_of_partition_entry;
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u32 partition_entry_array_crc32;
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u32 reserved1;
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};
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static_assert(sizeof(GptHeader) == 0x60);
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struct GptPartitionEntry {
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Guid partition_type_guid;
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Guid unique_partition_guid;
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u64 starting_lba;
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u64 ending_lba;
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u64 attributes;
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char partition_name[0x48];
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};
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static_assert(sizeof(GptPartitionEntry) == 0x80);
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struct Gpt {
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GptHeader header;
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u8 padding[0x1A0];
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GptPartitionEntry entries[128];
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};
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static_assert(sizeof(Gpt) == 16_KB + 0x200);
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constexpr const u16 SystemPartitionName[] = {
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'S', 'Y', 'S', 'T', 'E', 'M', 0
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};
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constexpr const u16 Package2PartitionName[] = {
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'B', 'C', 'P', 'K', 'G', '2', '-', '1', '-', 'N', 'o', 'r', 'm', 'a', 'l', '-', 'M', 'a', 'i', 'n', 0
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};
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}
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void InitializeEmummc(bool emummc_enabled, const secmon::EmummcConfiguration &emummc_cfg) {
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Result result;
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if (emummc_enabled) {
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/* Get sd card size. */
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s64 sd_card_size;
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if (R_FAILED((result = g_sd_card_storage.GetSize(std::addressof(sd_card_size))))) {
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ShowFatalError("Failed to get sd card size: 0x%08" PRIx32 "!\n", result.GetValue());
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}
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if (emummc_cfg.base_cfg.type == secmon::EmummcType_Partition) {
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const s64 partition_start = emummc_cfg.partition_cfg.start_sector * sdmmc::SectorSize;
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g_boot0_storage = AllocateObject<fs::SubStorage>(g_sd_card_storage, partition_start, 4_MB);
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g_user_storage = AllocateObject<fs::SubStorage>(g_sd_card_storage, partition_start + 8_MB, sd_card_size - (partition_start + 8_MB));
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} else if (emummc_cfg.base_cfg.type == secmon::EmummcType_File) {
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/* Get the base emummc path. */
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std::memcpy(g_emummc_path, emummc_cfg.file_cfg.path.str, sizeof(emummc_cfg.file_cfg.path.str));
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/* Get path length. */
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auto len = std::strlen(g_emummc_path);
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|
||
|
|
/* Append emmc. */
|
||
|
|
std::memcpy(g_emummc_path + len, "/eMMC", 6);
|
||
|
|
len += 6;
|
||
|
|
|
||
|
|
/* Open boot0. */
|
||
|
|
fs::FileHandle boot0_file;
|
||
|
|
std::memcpy(g_emummc_path + len, "/boot0", 7);
|
||
|
|
if (R_FAILED((result = fs::OpenFile(std::addressof(boot0_file), g_emummc_path, fs::OpenMode_Read)))) {
|
||
|
|
ShowFatalError("Failed to open emummc boot0 file: 0x%08" PRIx32 "!\n", result.GetValue());
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Open boot1. */
|
||
|
|
g_emummc_path[len + 5] = '1';
|
||
|
|
{
|
||
|
|
fs::DirectoryEntryType entry_type;
|
||
|
|
bool is_archive;
|
||
|
|
if (R_FAILED((result = fs::GetEntryType(std::addressof(entry_type), std::addressof(is_archive), g_emummc_path)))) {
|
||
|
|
ShowFatalError("Failed to find emummc boot1 file: 0x%08" PRIx32 "!\n", result.GetValue());
|
||
|
|
}
|
||
|
|
|
||
|
|
if (entry_type != fs::DirectoryEntryType_File) {
|
||
|
|
ShowFatalError("emummc boot1 file is not a file!\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Open userdata. */
|
||
|
|
std::memcpy(g_emummc_path + len, "/00", 4);
|
||
|
|
fs::FileHandle user00_file;
|
||
|
|
if (R_FAILED((result = fs::OpenFile(std::addressof(user00_file), g_emummc_path, fs::OpenMode_Read)))) {
|
||
|
|
ShowFatalError("Failed to open emummc user %02d file: 0x%08" PRIx32 "!\n", 0, result.GetValue());
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Create partitions. */
|
||
|
|
g_boot0_storage = AllocateObject<fs::FileHandleStorage>(boot0_file);
|
||
|
|
g_user_storage = AllocateObject<EmummcFileStorage>(user00_file, len + 1);
|
||
|
|
} else {
|
||
|
|
ShowFatalError("Unknown emummc type %d\n", static_cast<int>(emummc_cfg.base_cfg.type));
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* Initialize access to mmc. */
|
||
|
|
{
|
||
|
|
const Result result = InitializeMmc();
|
||
|
|
if (R_FAILED(result)) {
|
||
|
|
ShowFatalError("Failed to initialize mmc: 0x%08" PRIx32 "\n", result.GetValue());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Create storages. */
|
||
|
|
g_boot0_storage = std::addressof(g_mmc_boot0_storage);
|
||
|
|
g_user_storage = std::addressof(g_mmc_user_storage);
|
||
|
|
}
|
||
|
|
if (g_boot0_storage == nullptr) {
|
||
|
|
ShowFatalError("Failed to initialize BOOT0\n");
|
||
|
|
}
|
||
|
|
if (g_user_storage == nullptr) {
|
||
|
|
ShowFatalError("Failed to initialize Raw EMMC\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read the GPT. */
|
||
|
|
Gpt *gpt = static_cast<Gpt *>(AllocateAligned(sizeof(Gpt), 0x200));
|
||
|
|
{
|
||
|
|
const Result result = g_user_storage->Read(0x200, gpt, sizeof(*gpt));
|
||
|
|
if (R_FAILED(result)) {
|
||
|
|
ShowFatalError("Failed to read GPT: 0x%08" PRIx32 "\n", result.GetValue());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check the GPT. */
|
||
|
|
if (std::memcmp(gpt->header.signature, "EFI PART", 8) != 0) {
|
||
|
|
ShowFatalError("Invalid GPT signature\n");
|
||
|
|
}
|
||
|
|
if (gpt->header.number_of_partition_entries > util::size(gpt->entries)) {
|
||
|
|
ShowFatalError("Too many GPT entries\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Create system storage. */
|
||
|
|
for (u32 i = 0; i < gpt->header.number_of_partition_entries; ++i) {
|
||
|
|
if (gpt->entries[i].starting_lba < gpt->header.first_usable_lba) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
const s64 offset = 0x200 * gpt->entries[i].starting_lba;
|
||
|
|
const u64 size = 0x200 * (gpt->entries[i].ending_lba + 1 - gpt->entries[i].starting_lba);
|
||
|
|
|
||
|
|
if (std::memcmp(gpt->entries[i].partition_name, SystemPartitionName, sizeof(SystemPartitionName)) == 0) {
|
||
|
|
g_system_storage = AllocateObject<SystemPartitionStorage>(offset, size);
|
||
|
|
} else if (std::memcmp(gpt->entries[i].partition_name, Package2PartitionName, sizeof(Package2PartitionName)) == 0) {
|
||
|
|
g_package2_storage = AllocateObject<fs::SubStorage>(*g_user_storage, offset, size);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check that we created system storage. */
|
||
|
|
if (g_system_storage == nullptr) {
|
||
|
|
ShowFatalError("Failed to initialize SYSTEM\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check that we created package2 storage. */
|
||
|
|
if (g_package2_storage == nullptr) {
|
||
|
|
ShowFatalError("Failed to initialize Package2\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Mount system. */
|
||
|
|
if (!fs::MountSystem()) {
|
||
|
|
ShowFatalError("Failed to mount SYSTEM\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Result ReadBoot0(s64 offset, void *dst, size_t size) {
|
||
|
|
return g_boot0_storage->Read(offset, dst, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
Result ReadPackage2(s64 offset, void *dst, size_t size) {
|
||
|
|
return g_package2_storage->Read(offset, dst, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
Result ReadSystem(s64 offset, void *dst, size_t size) {
|
||
|
|
return g_system_storage->Read(offset, dst, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|