mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-09-19 21:43:29 +01:00
360 lines
14 KiB
C++
360 lines
14 KiB
C++
/*
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* Copyright (c) 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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R_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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R_SUCCEED();
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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 = static_cast<s64>(num_sectors) * static_cast<s64>(sdmmc::SectorSize);
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R_SUCCEED();
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}
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virtual Result Write(s64 offset, const void *buffer, size_t size) override {
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R_THROW(fs::ResultUnsupportedOperation());
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}
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virtual Result SetSize(s64 size) override {
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R_THROW(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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R_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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R_SUCCEED();
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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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R_SUCCEED();
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}
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virtual Result Write(s64 offset, const void *buffer, size_t size) override {
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R_THROW(fs::ResultUnsupportedOperation());
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}
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virtual Result SetSize(s64 size) override {
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R_THROW(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_handles[64];
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bool m_open[64];
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int m_file_path_ofs;
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private:
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void EnsureFile(int id) {
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if (!m_open[id]) {
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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(m_handles + id, 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_open[id] = true;
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}
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}
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public:
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EmummcFileStorage(fs::FileHandle user00, int ofs) : m_file_path_ofs(ofs) {
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const Result result = fs::GetFileSize(std::addressof(m_file_size), user00);
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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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for (size_t i = 0; i < util::size(m_handles); ++i) {
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m_open[i] = false;
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}
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m_handles[0] = user00;
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m_open[0] = true;
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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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/* Ensure the current file is open. */
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EnsureFile(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_handles[file], 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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R_SUCCEED();
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}
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virtual Result Flush() override {
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R_THROW(fs::ResultUnsupportedOperation());
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}
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virtual Result GetSize(s64 *out) override {
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R_THROW(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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R_THROW(fs::ResultUnsupportedOperation());
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}
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virtual Result SetSize(s64 size) override {
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R_THROW(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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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 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. */
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std::memcpy(g_emummc_path + len, "/eMMC", 6);
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len += 5;
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/* Open boot0. */
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fs::FileHandle boot0_file;
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std::memcpy(g_emummc_path + len, "/boot0", 7);
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if (R_FAILED((result = fs::OpenFile(std::addressof(boot0_file), g_emummc_path, fs::OpenMode_Read)))) {
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ShowFatalError("Failed to open emummc boot0 file: 0x%08" PRIx32 "!\n", result.GetValue());
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}
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/* Open boot1. */
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g_emummc_path[len + 5] = '1';
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{
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fs::DirectoryEntryType entry_type;
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bool is_archive;
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if (R_FAILED((result = fs::GetEntryType(std::addressof(entry_type), std::addressof(is_archive), g_emummc_path)))) {
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ShowFatalError("Failed to find emummc boot1 file: 0x%08" PRIx32 "!\n", result.GetValue());
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}
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if (entry_type != fs::DirectoryEntryType_File) {
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ShowFatalError("emummc boot1 file is not a file!\n");
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}
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}
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/* Open userdata. */
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std::memcpy(g_emummc_path + len, "/00", 4);
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fs::FileHandle user00_file;
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if (R_FAILED((result = fs::OpenFile(std::addressof(user00_file), g_emummc_path, fs::OpenMode_Read)))) {
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ShowFatalError("Failed to open emummc user %02d file: 0x%08" PRIx32 "!\n", 0, result.GetValue());
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}
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/* Create partitions. */
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g_boot0_storage = AllocateObject<fs::FileHandleStorage>(boot0_file);
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g_user_storage = AllocateObject<EmummcFileStorage>(user00_file, len + 1);
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} else {
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ShowFatalError("Unknown emummc type %d\n", static_cast<int>(emummc_cfg.base_cfg.type));
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}
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} else {
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/* Initialize access to mmc. */
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{
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const Result result = InitializeMmc();
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if (R_FAILED(result)) {
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ShowFatalError("Failed to initialize mmc: 0x%08" PRIx32 "\n", result.GetValue());
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}
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}
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/* Create storages. */
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g_boot0_storage = std::addressof(g_mmc_boot0_storage);
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g_user_storage = std::addressof(g_mmc_user_storage);
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}
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if (g_boot0_storage == nullptr) {
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ShowFatalError("Failed to initialize BOOT0\n");
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}
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if (g_user_storage == nullptr) {
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ShowFatalError("Failed to initialize Raw EMMC\n");
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}
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/* Read the GPT. */
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Gpt *gpt = static_cast<Gpt *>(AllocateAligned(sizeof(Gpt), 0x200));
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{
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const Result result = g_user_storage->Read(0x200, gpt, sizeof(*gpt));
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if (R_FAILED(result)) {
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ShowFatalError("Failed to read GPT: 0x%08" PRIx32 "\n", result.GetValue());
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}
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}
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/* Check the GPT. */
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if (std::memcmp(gpt->header.signature, "EFI PART", 8) != 0) {
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ShowFatalError("Invalid GPT signature\n");
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}
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if (gpt->header.number_of_partition_entries > util::size(gpt->entries)) {
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ShowFatalError("Too many GPT entries\n");
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}
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/* Create system storage. */
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for (u32 i = 0; i < gpt->header.number_of_partition_entries; ++i) {
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if (gpt->entries[i].starting_lba < gpt->header.first_usable_lba) {
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continue;
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}
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const s64 offset = INT64_C(0x200) * gpt->entries[i].starting_lba;
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const u64 size = UINT64_C(0x200) * (gpt->entries[i].ending_lba + 1 - gpt->entries[i].starting_lba);
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if (std::memcmp(gpt->entries[i].partition_name, Package2PartitionName, sizeof(Package2PartitionName)) == 0) {
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g_package2_storage = AllocateObject<fs::SubStorage>(*g_user_storage, offset, size);
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}
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}
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/* Check that we created package2 storage. */
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if (g_package2_storage == nullptr) {
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ShowFatalError("Failed to initialize Package2\n");
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}
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}
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Result ReadBoot0(s64 offset, void *dst, size_t size) {
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R_RETURN(g_boot0_storage->Read(offset, dst, size));
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}
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Result ReadPackage2(s64 offset, void *dst, size_t size) {
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R_RETURN(g_package2_storage->Read(offset, dst, size));
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}
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}
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