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Atmosphere/stratosphere/boot/source/boot_boot_reason.cpp

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/*
* Copyright (c) Atmosphère-NX
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*
* 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>
#include "boot_boot_reason.hpp"
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#include "boot_pmic_driver.hpp"
#include "boot_rtc_driver.hpp"
namespace ams::boot {
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namespace {
/* Globals. */
constinit spl::BootReason g_boot_reason = spl::BootReason_Unknown;
constinit bool g_detected_boot_reason = false;
/* Helpers. */
spl::BootReason DetectBootReason(u32 power_intr, u8 rtc_intr, u8 nv_erc, bool ac_ok) {
if (power_intr & 0x08) {
return spl::BootReason_OnKey;
}
if (rtc_intr & 0x02) {
return spl::BootReason_RtcAlarm1;
}
if (power_intr & 0x80) {
return spl::BootReason_AcOk;
}
if (rtc_intr & 0x04) {
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if (nv_erc != 0x80 && !spl::IsRecoveryBoot()) {
return spl::BootReason_RtcAlarm2;
}
}
if ((nv_erc & 0x40) && ac_ok) {
return spl::BootReason_AcOk;
}
return spl::BootReason_Unknown;
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}
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}
void DetectBootReason() {
u8 power_intr;
u8 rtc_intr;
u8 rtc_intr_m;
u8 nv_erc;
bool ac_ok;
/* Get values from PMIC. */
{
PmicDriver pmic_driver;
R_ABORT_UNLESS(pmic_driver.GetOnOffIrq(std::addressof(power_intr)));
R_ABORT_UNLESS(pmic_driver.GetNvErc(std::addressof(nv_erc)));
R_ABORT_UNLESS(pmic_driver.GetAcOk(std::addressof(ac_ok)));
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}
/* Get values from RTC. */
{
RtcDriver rtc_driver;
R_ABORT_UNLESS(rtc_driver.GetRtcIntr(std::addressof(rtc_intr)));
R_ABORT_UNLESS(rtc_driver.GetRtcIntrM(std::addressof(rtc_intr_m)));
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}
/* Set global derived boot reason. */
g_boot_reason = DetectBootReason(power_intr, rtc_intr & ~rtc_intr_m, nv_erc, ac_ok);
/* Set boot reason for SPL. */
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if (hos::GetVersion() >= hos::Version_3_0_0) {
/* Create the boot reason value. */
spl::BootReasonValue boot_reason_value = {};
boot_reason_value.power_intr = power_intr;
boot_reason_value.rtc_intr = rtc_intr & ~rtc_intr_m;
boot_reason_value.nv_erc = nv_erc;
boot_reason_value.boot_reason = g_boot_reason;
/* Set the boot reason value. */
R_ABORT_UNLESS(spl::SetBootReason(boot_reason_value));
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}
g_detected_boot_reason = true;
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}
spl::BootReason GetBootReason() {
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AMS_ABORT_UNLESS(g_detected_boot_reason);
return g_boot_reason;
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}
}