exo2: rename exosphere2 -> exosphere

exosphere/warmboot/source/warmboot_main.cpp

@@ -0,0 +1,105 @@
+/*
+ * 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 <exosphere.hpp>
+#include "warmboot_bootrom_workaround.hpp"
+#include "warmboot_clkrst.hpp"
+#include "warmboot_cpu_cluster.hpp"
+#include "warmboot_dram.hpp"
+#include "warmboot_main.hpp"
+#include "warmboot_misc.hpp"
+#include "warmboot_secure_monitor.hpp"
+
+namespace ams::warmboot {
+
+    namespace {
+
+        constexpr inline const uintptr_t PMC       = secmon::MemoryRegionPhysicalDevicePmc.GetAddress();
+        constexpr inline const uintptr_t FLOW_CTLR = secmon::MemoryRegionPhysicalDeviceFlowController.GetAddress();
+
+        constexpr inline const uintptr_t ExpectedMetadataAddress = 0x40010244;
+
+    }
+
+    void Main(const Metadata *metadata) {
+        /* Ensure that we're running under vaguely sane conditions. */
+        AMS_ABORT_UNLESS(metadata->magic == Metadata::Magic);
+        AMS_ABORT_UNLESS(metadata->target_firmware <= ams::TargetFirmware_Max);
+
+        /* Restrict the bpmp's access to dram. */
+        if (metadata->target_firmware >= TargetFirmware_4_0_0) {
+            RestrictBpmpAccessToMainMemory();
+        }
+
+        /* Configure rtck-daisychaining/jtag. */
+        ConfigureMiscSystemDebug();
+
+        /* NOTE: Here, Nintendo checks that the number of burnt anti-downgrade fuses is valid. */
+
+        /* NOTE: Here, Nintendo validates that APBDEV_PMC_SECURE_SCRATCH32 contains the correct magic number for the current warmboot firmware revision. */
+
+        /* Validate that we're executing at the correct address. */
+        AMS_ABORT_UNLESS(reinterpret_cast<uintptr_t>(metadata) == ExpectedMetadataAddress);
+
+        /* Validate that we're executing on the bpmp. */
+        AMS_ABORT_UNLESS(reg::Read(PG_UP(PG_UP_TAG)) == PG_UP_TAG_PID_COP);
+
+        /* Configure fuse bypass. */
+        fuse::ConfigureFuseBypass();
+
+        /* Configure system oscillators. */
+        ConfigureOscillators();
+
+        /* Restore DRAM configuration. */
+        RestoreRamSvop();
+        ConfigureEmcPmacroTraining();
+
+        /* If on Erista, work around the bootrom mbist issue. */
+        if (fuse::GetSocType() == fuse::SocType_Erista) {
+            ApplyMbistWorkaround();
+        }
+
+        /* Initialize the cpu cluster. */
+        InitializeCpuCluster();
+
+        /* Restore the secure monitor to tzram. */
+        RestoreSecureMonitorToTzram(metadata->target_firmware);
+
+        /* Power on the cpu. */
+        PowerOnCpu();
+
+        /* Halt ourselves. */
+        const bool disable_jtag = metadata->target_firmware >= TargetFirmware_4_0_0;
+        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_SEL(HALT_COP_EVENTS_JTAG, disable_jtag, DISABLED, ENABLED));
+        }
+    }
+
+    NORETURN void ExceptionHandler() {
+        /* Write enable to MAIN_RESET. */
+        reg::Write(PMC + APBDEV_PMC_CNTRL, PMC_REG_BITS_ENUM(CNTRL_MAIN_RESET, ENABLE));
+        while (true) { /* ... */ }
+    }
+
+}
+
+namespace ams::diag {
+
+    void AbortImpl() {
+        warmboot::ExceptionHandler();
+    }
+
+}