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exo2: implement the first half of SmcCpuSuspend

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This commit is contained in:
Michael Scire 2020-06-07 19:16:48 -07:00 committed by SciresM
parent e1835d9ba2
commit 0202a95832
11 changed files with 175 additions and 5 deletions
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112
exosphere2/program/source/smc/secmon_smc_power_management.cpp
View file

@ -18,6 +18,7 @@
#include "../secmon_cpu_context.hpp"
#include "../secmon_error.hpp"
#include "secmon_smc_power_management.hpp"
#include "secmon_smc_se_lock.hpp"
namespace ams::secmon {
@ -35,8 +36,27 @@ namespace ams::secmon::smc {
namespace {
constexpr inline uintptr_t PMC = MemoryRegionVirtualDevicePmc.GetAddress();
constexpr inline uintptr_t GPIO = MemoryRegionVirtualDeviceGpio.GetAddress();
constexpr inline uintptr_t CLK_RST = MemoryRegionVirtualDeviceClkRst.GetAddress();
constexpr inline uintptr_t CommonSmcStackTop = MemoryRegionVirtualTzramVolatileData.GetEndAddress() - (0x80 * (NumCores - 1));
enum PowerStateType {
PowerStateType_StandBy = 0,
PowerStateType_PowerDown = 1,
};
enum PowerStateId {
PowerStateId_Sc7 = 27,
};
/* http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf Page 46 */
struct SuspendCpuPowerState {
using StateId = util::BitPack32::Field< 0, 16, PowerStateId>;
using StateType = util::BitPack32::Field<16, 1, PowerStateType>;
using PowerLevel = util::BitPack32::Field<24, 2, u32>;
};
constinit bool g_charger_hi_z_mode_enabled = false;
constinit const reg::BitsMask CpuPowerGateStatusMasks[NumCores] = {
@ -126,6 +146,95 @@ namespace ams::secmon::smc {
FinalizePowerOff();
}
void ValidateSocStateForSuspend() {
/* TODO */
}
void SaveSecureContextAndSuspend() {
/* TODO */
/* Finalize our powerdown and wait for an interrupt. */
FinalizePowerOff();
}
SmcResult SuspendCpuImpl(SmcArguments &args) {
/* Decode arguments. */
const util::BitPack32 power_state = { static_cast<u32>(args.r[1]) };
const uintptr_t entry_point = args.r[2];
const uintptr_t context_id = args.r[3];
const auto state_type = power_state.Get<SuspendCpuPowerState::StateType>();
const auto state_id = power_state.Get<SuspendCpuPowerState::StateId>();
const auto core_id = hw::GetCurrentCoreId();
/* Validate arguments. */
SMC_R_UNLESS(state_type == PowerStateType_PowerDown, PsciDenied);
SMC_R_UNLESS(state_id == PowerStateId_Sc7, PsciDenied);
/* Orchestrate charger transition to Hi-Z mode if needed. */
if (IsChargerHiZModeEnabled()) {
/* Ensure we can do comms over i2c-1. */
clkrst::EnableI2c1Clock();
/* If the charger isn't in hi-z mode, perform a transition. */
if (!charger::IsHiZMode()) {
charger::EnterHiZMode();
/* Wait up to 50ms for the transition to complete. */
const auto start_time = util::GetMicroSeconds();
auto current_time = start_time;
while ((current_time - start_time) <= 50'000) {
if (auto intr_status = reg::Read(GPIO + 0x634); (intr_status & 1) == 0) {
/* Wait 256 us to ensure the transition completes. */
util::WaitMicroSeconds(256);
break;
}
current_time = util::GetMicroSeconds();
}
}
/* Disable i2c-1, since we're done communicating over it. */
clkrst::DisableI2c1Clock();
}
/* Enable wake event detection. */
pmc::EnableWakeEventDetection();
/* Ensure that i2c-5 is usable for communicating with the pmic. */
clkrst::EnableI2c5Clock();
i2c::Initialize(i2c::Port_5);
/* Orchestrate sleep entry with the pmic. */
pmic::EnableSleep();
/* Ensure that the soc is in a state valid for us to suspend. */
ValidateSocStateForSuspend();
/* Configure the pmc for sc7 entry. */
pmc::ConfigureForSc7Entry();
/* Configure the flow controller for sc7 entry. */
flow::SetCc4Ctrl(core_id, 0);
flow::SetHaltCpuEvents(core_id, false);
flow::ClearL2FlushControl();
flow::SetCpuCsr(core_id, FLOW_CTLR_CPUN_CSR_ENABLE_EXT_POWERGATE_CPU_TURNOFF_CPURAIL);
/* Save the entry context. */
SetEntryContext(core_id, entry_point, context_id);
/* Configure the cpu context for reset. */
SaveDebugRegisters();
SetCoreOff();
SetResetExpected(true);
/* Switch to use the common smc stack (all other cores are off), and perform suspension. */
PivotStackAndInvoke(reinterpret_cast<void *>(CommonSmcStackTop), SaveSecureContextAndSuspend);
/* This code will never be reached. */
__builtin_unreachable();
}
}
SmcResult SmcPowerOffCpu(SmcArguments &args) {
@ -170,8 +279,7 @@ namespace ams::secmon::smc {
}
SmcResult SmcSuspendCpu(SmcArguments &args) {
/* TODO */
return SmcResult::NotImplemented;
return LockSecurityEngineAndInvoke(args, SuspendCpuImpl);
}
bool IsChargerHiZModeEnabled() {

1
libraries/libexosphere/include/exosphere/clkrst.hpp
View file

@ -27,6 +27,7 @@ namespace ams::clkrst {
void EnableUartCClock();
void EnableActmonClock();
void EnableI2c1Clock();
void EnableI2c5Clock();
void DisableI2c1Clock();

1
libraries/libexosphere/include/exosphere/flow.hpp
View file

@ -25,5 +25,6 @@ namespace ams::flow {
void SetCpuCsr(int core, u32 enable_ext);
void SetHaltCpuEvents(int core, bool resume_on_irq);
void SetCc4Ctrl(int core, u32 value);
void ClearL2FlushControl();
}

2
libraries/libexosphere/include/exosphere/pmc.hpp
View file

@ -36,6 +36,8 @@ namespace ams::pmc {
void SetRegisterAddress(uintptr_t address);
void InitializeRandomScratch();
void EnableWakeEventDetection();
void ConfigureForSc7Entry();
void LockSecureRegister(SecureRegister reg);

2
libraries/libexosphere/include/exosphere/pmic.hpp
View file

@ -29,5 +29,7 @@ namespace ams::pmic {
void EnableVddCpu(Regulator regulator);
void DisableVddCpu(Regulator regulator);
void EnableSleep();
bool IsAcOk();
}

1
libraries/libexosphere/include/exosphere/tegra/tegra_flow_ctlr.hpp
View file

@ -18,6 +18,7 @@
#define FLOW_CTLR_FLOW_DBG_QUAL (0x050)
#define FLOW_CTLR_L2FLUSH_CONTROL (0x094)
#define FLOW_CTLR_BPMP_CLUSTER_CONTROL (0x098)
#define FLOW_CTLR_CPU0_CSR (0x008)

2
libraries/libexosphere/include/exosphere/tegra/tegra_pmc.hpp
View file

@ -212,3 +212,5 @@ DEFINE_PMC_REG_BIT_ENUM(CLAMP_STATUS_XUSBB, 21, DISABLE, ENABLE);
DEFINE_PMC_REG_BIT_ENUM(CLAMP_STATUS_XUSBC, 22, DISABLE, ENABLE);
DEFINE_PMC_REG_BIT_ENUM(CLAMP_STATUS_VIC, 23, DISABLE, ENABLE);
DEFINE_PMC_REG_BIT_ENUM(CLAMP_STATUS_IRAM, 24, DISABLE, ENABLE);
DEFINE_PMC_REG_BIT_ENUM(CNTRL2_WAKE_DET_EN, 9, DISABLE, ENABLE);

2
libraries/libexosphere/source/clkrst/clkrst_api.cpp
View file

@ -105,7 +105,7 @@ namespace ams::clkrst {
}
void EnableI2c5Clock() {
EnableClock(I2c1Clock);
EnableClock(I2c5Clock);
}
void DisableI2c1Clock() {

4
libraries/libexosphere/source/flow/flow_api.cpp
View file

@ -76,4 +76,8 @@ namespace ams::flow {
reg::Write(g_register_address + FlowControllerRegisterOffsets[core].cc4_core_ctrl, value);
}
void ClearL2FlushControl() {
reg::Write(g_register_address + FLOW_CTLR_L2FLUSH_CONTROL, 0);
}
}

26
libraries/libexosphere/source/pmc/pmc_api.cpp
View file

@ -224,6 +224,32 @@ namespace ams::pmc {
LockSecureRegister(SecureRegister_Srk);
}
void EnableWakeEventDetection() {
/* Get the address. */
const uintptr_t address = g_register_address;
/* Wait 75us, then enable event detection, then wait another 75us. */
util::WaitMicroSeconds(75);
reg::ReadWrite(address + APBDEV_PMC_CNTRL2, PMC_REG_BITS_ENUM(CNTRL2_WAKE_DET_EN, ENABLE));
util::WaitMicroSeconds(75);
/* Enable all wake events. */
reg::Write(address + APBDEV_PMC_WAKE_STATUS, 0xFFFFFFFFu);
reg::Write(address + APBDEV_PMC_WAKE2_STATUS, 0xFFFFFFFFu);
util::WaitMicroSeconds(75);
}
void ConfigureForSc7Entry() {
/* Get the address. */
const uintptr_t address = g_register_address;
/* Configure the bootrom to perform a warmboot. */
reg::Write(address + APBDEV_PMC_SCRATCH0, 0x1);
/* Enable the TSC multiplier. */
reg::ReadWrite(address + APBDEV_PMC_DPD_ENABLE, PMC_REG_BITS_ENUM(DPD_ENABLE_TSC_MULT_EN, ENABLE));
}
void LockSecureRegister(SecureRegister reg) {
/* Get the address. */
const uintptr_t address = g_register_address;

27
libraries/libexosphere/source/pmic/pmic_api.cpp
View file

@ -25,13 +25,17 @@ namespace ams::pmic {
constexpr inline int I2cAddressMarikoMax77812_A = 0x31;
constexpr inline int I2cAddressMarikoMax77812_B = 0x33;
constexpr inline int I2cAddressMax77620Pmic = 0x3C;
/* https://github.com/Atmosphere-NX/Atmosphere/blob/master/emummc/source/power/max77620.h */
/* https://github.com/Atmosphere-NX/Atmosphere/blob/master/emummc/source/power/max7762x.h */
/* TODO: Find datasheet, link to it instead. */
/* NOTE: Tentatively, Max77620 "mostly" matches https://datasheets.maximintegrated.com/en/ds/MAX77863.pdf. */
/* This does not contain Max77621 documentation, though. */
constexpr inline int Max77620RegisterGpio0 = 0x36;
constexpr inline int Max77620RegisterAmeGpio = 0x40;
constexpr inline int Max77620RegisterOnOffStat = 0x15;
constexpr inline int Max77620RegisterGpio0 = 0x36;
constexpr inline int Max77620RegisterAmeGpio = 0x40;
constexpr inline int Max77620RegisterOnOffCnfg1 = 0x41;
constexpr inline int Max77621RegisterVOut = 0x00;
constexpr inline int Max77621RegisterVOutDvc = 0x01;
@ -108,6 +112,10 @@ namespace ams::pmic {
}
}
u8 GetPmicOnOffStat() {
return i2c::QueryByte(i2c::Port_5, I2cAddressMax77620Pmic, Max77620RegisterOnOffStat);
}
}
void EnableVddCpu(Regulator regulator) {
@ -132,4 +140,19 @@ namespace ams::pmic {
}
}
void EnableSleep() {
/* Get the current onoff cfg. */
u8 cnfg = i2c::QueryByte(i2c::Port_5, I2cAddressMax77620Pmic, Max77620RegisterOnOffCnfg1);
/* Set SlpEn. */
cnfg |= (1 << 2);
/* Write the new cfg. */
i2c::SendByte(i2c::Port_5, I2cAddressMax77620Pmic, Max77620RegisterOnOffCnfg1, cnfg);
}
bool IsAcOk() {
return (GetPmicOnOffStat() & (1 << 1)) != 0;
}
}