mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-06 12:11:43 +00:00
54 lines
1.9 KiB
C++
54 lines
1.9 KiB
C++
/*
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* Copyright (c) 2018-2020 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 "boot_check_clock.hpp"
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#include "boot_power_utils.hpp"
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namespace ams::boot {
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namespace {
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/* Convenience definitions. */
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constexpr u32 ExpectedPlluDivP = (1 << 16);
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constexpr u32 ExpectedPlluDivN = (25 << 8);
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constexpr u32 ExpectedPlluDivM = (2 << 0);
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constexpr u32 ExpectedPlluVal = (ExpectedPlluDivP | ExpectedPlluDivN | ExpectedPlluDivM);
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constexpr u32 ExpectedPlluMask = 0x1FFFFF;
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constexpr u32 ExpectedUtmipDivN = (25 << 16);
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constexpr u32 ExpectedUtmipDivM = (1 << 8);
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constexpr u32 ExpectedUtmipVal = (ExpectedUtmipDivN | ExpectedUtmipDivM);
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constexpr u32 ExpectedUtmipMask = 0xFFFF00;
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/* Helpers. */
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bool IsUsbClockValid() {
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uintptr_t car_regs = dd::GetIoMapping(0x60006000ul, os::MemoryPageSize);
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const u32 pllu = reg::Read(car_regs + 0xC0);
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const u32 utmip = reg::Read(car_regs + 0x480);
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return ((pllu & ExpectedPlluMask) == ExpectedPlluVal) && ((utmip & ExpectedUtmipMask) == ExpectedUtmipVal);
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}
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}
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void CheckClock() {
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if (!IsUsbClockValid()) {
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/* Sleep for 1s, then reboot. */
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svcSleepThread(1'000'000'000ul);
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RebootSystem();
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}
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}
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}
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