add entire atmosphere source code and also add ram timing fixes

Source/Atmosphere/fusee/program/source/fusee_main.cpp

@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 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 <exosphere.hpp>
+#include "fusee_display.hpp"
+#include "sein/fusee_secure_initialize.hpp"
+#include "sdram/fusee_sdram.hpp"
+#include "mtc/fusee_mtc.hpp"
+#include "fs/fusee_fs_api.hpp"
+#include "fusee_overlay_manager.hpp"
+#include "fusee_sd_card.hpp"
+#include "fusee_fatal.hpp"
+#include "fusee_external_package.hpp"
+#include "fusee_setup_horizon.hpp"
+#include "fusee_secmon_sync.hpp"
+
+namespace ams::nxboot {
+
+    namespace {
+
+        constexpr const char ExternalPackageFilePath[] = "sdmc:/atmosphere/package3";
+
+        constinit fs::FileHandle g_package_file;
+
+        void OpenExternalPackage() {
+            Result result;
+
+            /* Open external package. */
+            if (R_FAILED((result = fs::OpenFile(std::addressof(g_package_file), ExternalPackageFilePath, fs::OpenMode_Read)))) {
+                ShowFatalError("Failed to open %s!\n", ExternalPackageFilePath);
+            }
+
+            /* Get file size. */
+            s64 file_size;
+            if (R_FAILED((result = fs::GetFileSize(std::addressof(file_size), g_package_file)))) {
+                ShowFatalError("Failed to get package3 size: 0x%08" PRIx32 "\n", result.GetValue());
+            }
+
+            /* Check file size. */
+            if (static_cast<size_t>(file_size) != ExternalPackageSize) {
+                ShowFatalError("package3 seems corrupted (size 0x%zx != 0x%zx)", static_cast<size_t>(file_size), ExternalPackageSize);
+            }
+        }
+
+        void ReadFullExternalPackage() {
+            Result result;
+
+            if (R_FAILED((result = fs::ReadFile(g_package_file, 0, const_cast<void *>(static_cast<const void *>(std::addressof(GetExternalPackage()))), ExternalPackageSize)))) {
+                ShowFatalError("Failed to read %s!\n", ExternalPackageFilePath);
+            }
+        }
+
+        void CloseExternalPackage() {
+            fs::CloseFile(g_package_file);
+        }
+
+    }
+
+    void Main() {
+        /* Perform secure hardware initialization. */
+        SecureInitialize(true);
+
+        /* Overclock the bpmp. */
+        clkrst::SetBpmpClockRate(fuse::GetSocType() == fuse::SocType_Mariko ? clkrst::BpmpClockRate_589MHz : clkrst::BpmpClockRate_576MHz);
+
+        /* Initialize Sdram. */
+        InitializeSdram();
+
+        /* Initialize cache. */
+        hw::InitializeDataCache();
+
+        /* Initialize SD card. */
+        {
+            Result result = InitializeSdCard();
+            if (R_FAILED(result)) {
+                ShowFatalError("Failed to initialize the SD card: 0x%08" PRIx32 "\n", result.GetValue());
+            }
+        }
+
+        /* Mount SD card. */
+        if (!fs::MountSdCard()) {
+            ShowFatalError("Failed to mount the SD card.");
+        }
+
+        /* If we have a fatal error, save and display it. */
+        SaveAndShowFatalError();
+
+        /* Open the external package. */
+        OpenExternalPackage();
+
+        /* Load the memory training overlay. */
+        LoadOverlay(g_package_file, OverlayId_MemoryTraining);
+
+        /* Do memory training. */
+        DoMemoryTraining();
+
+        /* Read the rest of the archive file. */
+        ReadFullExternalPackage();
+
+        /* Save the memory training overlay. */
+        SaveMemoryTrainingOverlay();
+
+        /* Initialize display (splash screen will be visible from this point onwards). */
+        InitializeDisplay();
+        ShowDisplay();
+
+        /* Close the external package. */
+        CloseExternalPackage();
+
+        /* Perform rest of the boot process. */
+        SetupAndStartHorizon();
+
+        /* Restore the memory training overlay. */
+        RestoreMemoryTrainingOverlay();
+
+        /* Restore memory clock rate. */
+        RestoreMemoryClockRate();
+
+        /* Restore secure monitor code. */
+        RestoreSecureMonitorOverlay();
+
+        /* Finalize display. */
+        FinalizeDisplay();
+
+        /* Finalize sd card. */
+        FinalizeSdCard();
+
+        /* Finalize the data cache. */
+        hw::FinalizeDataCache();
+
+        /* Downclock the bpmp. */
+        clkrst::SetBpmpClockRate(clkrst::BpmpClockRate_408MHz);
+
+        /* Signal to the secure monitor that we're done. */
+        SetBootloaderState(pkg1::BootloaderState_Done);
+
+        /* Halt ourselves. */
+        while (true) {
+            reg::Write(secmon::MemoryRegionPhysicalDeviceFlowController.GetAddress() + FLOW_CTLR_HALT_COP_EVENTS, FLOW_REG_BITS_ENUM(HALT_COP_EVENTS_MODE, FLOW_MODE_STOP),
+                                                                                                                  FLOW_REG_BITS_ENUM(HALT_COP_EVENTS_JTAG,        ENABLED));
+        }
+    }
+
+}