mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-06 04:01:44 +00:00
137 lines
4.2 KiB
C++
137 lines
4.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stratosphere.hpp>
|
|
|
|
namespace ams::emummc {
|
|
|
|
namespace {
|
|
|
|
/* Convenience Definitions. */
|
|
constexpr u32 StorageMagic = util::FourCC<'E','F','S','0'>::Code;
|
|
constexpr size_t MaxDirLen = 0x7F;
|
|
|
|
/* Types. */
|
|
struct BaseConfig {
|
|
u32 magic;
|
|
u32 type;
|
|
u32 id;
|
|
u32 fs_version;
|
|
};
|
|
|
|
struct PartitionConfig {
|
|
u64 start_sector;
|
|
};
|
|
|
|
struct FileConfig {
|
|
char path[MaxDirLen + 1];
|
|
};
|
|
|
|
struct ExosphereConfig {
|
|
BaseConfig base_cfg;
|
|
union {
|
|
PartitionConfig partition_cfg;
|
|
FileConfig file_cfg;
|
|
};
|
|
char emu_dir_path[MaxDirLen + 1];
|
|
};
|
|
|
|
enum Storage : u32 {
|
|
Storage_Emmc,
|
|
Storage_Sd,
|
|
Storage_SdFile,
|
|
|
|
Storage_Count,
|
|
};
|
|
|
|
/* Globals. */
|
|
os::Mutex g_lock(false);
|
|
ExosphereConfig g_exo_config;
|
|
bool g_is_emummc;
|
|
bool g_has_cached;
|
|
|
|
/* Helpers. */
|
|
void CacheValues() {
|
|
std::scoped_lock lk(g_lock);
|
|
|
|
if (g_has_cached) {
|
|
return;
|
|
}
|
|
|
|
/* Retrieve and cache values. */
|
|
{
|
|
|
|
typename std::aligned_storage<2 * (MaxDirLen + 1), os::MemoryPageSize>::type path_storage;
|
|
|
|
struct {
|
|
char file_path[MaxDirLen + 1];
|
|
char nintendo_path[MaxDirLen + 1];
|
|
} *paths = reinterpret_cast<decltype(paths)>(&path_storage);
|
|
|
|
/* Retrieve paths from secure monitor. */
|
|
AMS_ABORT_UNLESS(spl::smc::AtmosphereGetEmummcConfig(&g_exo_config, paths, 0) == spl::smc::Result::Success);
|
|
|
|
const Storage storage = static_cast<Storage>(g_exo_config.base_cfg.type);
|
|
g_is_emummc = g_exo_config.base_cfg.magic == StorageMagic && storage != Storage_Emmc;
|
|
|
|
/* Format paths. Ignore string format warnings. */
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wformat-truncation"
|
|
{
|
|
if (storage == Storage_SdFile) {
|
|
std::snprintf(g_exo_config.file_cfg.path, sizeof(g_exo_config.file_cfg.path), "/%s", paths->file_path);
|
|
}
|
|
|
|
std::snprintf(g_exo_config.emu_dir_path, sizeof(g_exo_config.emu_dir_path), "/%s", paths->nintendo_path);
|
|
|
|
/* If we're emummc, implement default nintendo redirection path. */
|
|
if (g_is_emummc && std::strcmp(g_exo_config.emu_dir_path, "/") == 0) {
|
|
std::snprintf(g_exo_config.emu_dir_path, sizeof(g_exo_config.emu_dir_path), "/emummc/Nintendo_%04x", g_exo_config.base_cfg.id);
|
|
}
|
|
}
|
|
#pragma GCC diagnostic pop
|
|
}
|
|
|
|
g_has_cached = true;
|
|
}
|
|
|
|
}
|
|
|
|
/* Get whether emummc is active. */
|
|
bool IsActive() {
|
|
CacheValues();
|
|
return g_is_emummc;
|
|
}
|
|
|
|
/* Get Nintendo redirection path. */
|
|
const char *GetNintendoDirPath() {
|
|
CacheValues();
|
|
if (!g_is_emummc) {
|
|
return nullptr;
|
|
}
|
|
return g_exo_config.emu_dir_path;
|
|
}
|
|
|
|
/* Get Emummc folderpath, NULL if not file-based. */
|
|
const char *GetFilePath() {
|
|
CacheValues();
|
|
if (!g_is_emummc || g_exo_config.base_cfg.type != Storage_SdFile) {
|
|
return nullptr;
|
|
}
|
|
return g_exo_config.file_cfg.path;
|
|
}
|
|
|
|
}
|