Atmosphere/stratosphere/boot/source/boot_boot_reason.cpp
2019-05-02 19:33:12 -07:00

114 lines
2.8 KiB
C++

/*
* Copyright (c) 2018-2019 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 "boot_functions.hpp"
#include "boot_pmic_driver.hpp"
#include "boot_rtc_driver.hpp"
static u32 g_boot_reason = 0;
static bool g_detected_boot_reason = false;
struct BootReasonValue {
union {
struct {
u8 power_intr;
u8 rtc_intr;
u8 nv_erc;
u8 boot_reason;
};
u32 value;
};
};
static u32 MakeBootReason(u32 power_intr, u8 rtc_intr, u8 nv_erc, bool ac_ok) {
if (power_intr & 0x08) {
return 2;
}
if (rtc_intr & 0x02) {
return 3;
}
if (power_intr & 0x80) {
return 1;
}
if (rtc_intr & 0x04) {
if (nv_erc != 0x80 && !Boot::IsRecoveryBoot()) {
return 4;
}
}
if ((nv_erc & 0x40) && ac_ok) {
return 1;
}
return 0;
}
void Boot::DetectBootReason() {
u8 power_intr;
u8 rtc_intr;
u8 rtc_intr_m;
u8 nv_erc;
bool ac_ok;
/* Get values from PMIC. */
{
PmicDriver pmic_driver;
if (R_FAILED(pmic_driver.GetPowerIntr(&power_intr))) {
std::abort();
}
if (R_FAILED(pmic_driver.GetNvErc(&nv_erc))) {
std::abort();
}
if (R_FAILED(pmic_driver.GetAcOk(&ac_ok))) {
std::abort();
}
}
/* Get values from RTC. */
{
RtcDriver rtc_driver;
if (R_FAILED(rtc_driver.GetRtcIntr(&rtc_intr))) {
std::abort();
}
if (R_FAILED(rtc_driver.GetRtcIntrM(&rtc_intr_m))) {
std::abort();
}
}
/* Set global derived boot reason. */
g_boot_reason = MakeBootReason(power_intr, rtc_intr & ~rtc_intr_m, nv_erc, ac_ok);
/* Set boot reason for 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;
if (R_FAILED(splSetBootReason(boot_reason_value.value))) {
std::abort();
}
}
g_detected_boot_reason = true;
}
u32 Boot::GetBootReason() {
if (!g_detected_boot_reason) {
std::abort();
}
return g_boot_reason;
}