mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-23 12:51:13 +00:00
609a302e16
This implements waitable management for Events (and implements Events). It also refactors PM to use new Event/Waitable semantics, and also adds STS_ASSERT as a macro for asserting a boolean expression. The rest of stratosphere has been refactored to use STS_ASSERT whenever possible.
141 lines
3.8 KiB
C++
141 lines
3.8 KiB
C++
/*
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* Copyright (c) 2018-2019 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 <switch.h>
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#include <stratosphere.hpp>
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/* EFS0 */
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static constexpr u32 EmummcStorageMagic = 0x30534645;
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static constexpr size_t EmummcMaxDirLength = 0x7F;
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struct EmummcBaseConfig {
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u32 magic;
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u32 type;
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u32 id;
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u32 fs_version;
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};
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struct EmummcPartitionConfig {
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u64 start_sector;
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};
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struct EmummcFileConfig {
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char path[EmummcMaxDirLength+1];
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};
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struct ExoEmummcConfig {
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EmummcBaseConfig base_cfg;
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union {
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EmummcPartitionConfig partition_cfg;
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EmummcFileConfig file_cfg;
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};
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char emu_dir_path[EmummcMaxDirLength+1];
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};
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enum EmummcType {
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EmummcType_Emmc = 0,
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EmummcType_Sd,
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EmummcType_SdFile,
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EmummcType_Max,
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};
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static bool g_IsEmummc = false;
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static bool g_HasCached = false;
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static Mutex g_Mutex;
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static ExoEmummcConfig g_exo_emummc_config;
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static void _CacheValues(void)
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{
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if (__atomic_load_n(&g_HasCached, __ATOMIC_SEQ_CST))
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return;
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mutexLock(&g_Mutex);
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if (g_HasCached) {
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mutexUnlock(&g_Mutex);
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return;
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}
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static struct {
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char file_path[EmummcMaxDirLength+1];
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char nintendo_path[EmummcMaxDirLength+1];
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} __attribute__((aligned(0x1000))) paths;
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{
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SecmonArgs args = {0};
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args.X[0] = 0xF0000404; /* smcAmsGetEmunandConfig */
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args.X[1] = 0; /* NAND */
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args.X[2] = reinterpret_cast<u64>(&paths); /* path output */
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R_ASSERT(svcCallSecureMonitor(&args));
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STS_ASSERT(args.X[0] == 0);
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std::memcpy(&g_exo_emummc_config, &args.X[1], sizeof(args) - sizeof(args.X[0]));
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}
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const EmummcType emummc_type = static_cast<EmummcType>(g_exo_emummc_config.base_cfg.type);
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/* Ignore format warnings. */
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wformat-truncation"
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switch (emummc_type) {
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case EmummcType_SdFile:
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std::snprintf(g_exo_emummc_config.file_cfg.path, sizeof(g_exo_emummc_config.file_cfg.path), "/%s", paths.file_path);
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break;
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default:
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break;
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}
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std::snprintf(g_exo_emummc_config.emu_dir_path, sizeof(g_exo_emummc_config.emu_dir_path), "/%s", paths.nintendo_path);
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g_IsEmummc = g_exo_emummc_config.base_cfg.magic == EmummcStorageMagic && emummc_type != EmummcType_Emmc;
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/* Default Nintendo redirection path. */
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if (g_IsEmummc) {
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if (std::strcmp(g_exo_emummc_config.emu_dir_path, "/") == 0) {
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std::snprintf(g_exo_emummc_config.emu_dir_path, sizeof(g_exo_emummc_config.emu_dir_path), "/emummc/Nintendo_%04x", g_exo_emummc_config.base_cfg.id);
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}
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}
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#pragma GCC diagnostic pop
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__atomic_store_n(&g_HasCached, true, __ATOMIC_SEQ_CST);
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mutexUnlock(&g_Mutex);
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}
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/* Get whether emummc is active. */
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bool IsEmummc() {
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_CacheValues();
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return g_IsEmummc;
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}
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/* Get Nintendo redirection path. */
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const char *GetEmummcNintendoDirPath() {
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_CacheValues();
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if (!g_IsEmummc) {
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return nullptr;
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}
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return g_exo_emummc_config.emu_dir_path;
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}
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/* Get Emummc folderpath, NULL if not file-based. */
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const char *GetEmummcFilePath() {
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_CacheValues();
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if (!g_IsEmummc || g_exo_emummc_config.base_cfg.type != EmummcType_SdFile) {
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return nullptr;
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}
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return g_exo_emummc_config.file_cfg.path;
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}
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