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thermosphere: generic timer rewrite

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This commit is contained in:
TuxSH 2020-02-27 01:59:23 +00:00
parent d15154f668
commit 0cb5eab933
5 changed files with 172 additions and 155 deletions
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9
thermosphere/src/cpu/hvisor_cpu_sysreg_general.hpp
View file

@ -438,4 +438,11 @@ namespace ams::hvisor::cpu {
PSR_SP_ELX = BITL(0),
};
}
// cnt*_ctl flags
enum CntCtlFlags {
CNTCTL_ISTATUS = BITL(2),
CNTCTL_IMASK = BITL(1),
CNTCTL_ENABLE = BITL(0),
};
}

61
thermosphere/src/hvisor_generic_timer.cpp Normal file
View file

@ -0,0 +1,61 @@
/*
* Copyright (c) 2019-2020 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 "hvisor_generic_timer.hpp"
#include "hvisor_irq_manager.hpp"
#include "hvisor_core_context.hpp"
#include "cpu/hvisor_cpu_interrupt_mask_guard.hpp"
#include "cpu/hvisor_cpu_instructions.hpp"
#include <mutex>
namespace ams::hvisor {
void GenericTimer::Initialize()
{
Configure(false, false);
if (currentCoreCtx->IsBootCore()) {
m_timerFreq = THERMOSPHERE_GET_SYSREG(cntfrq_el0);
}
IrqManager::GetInstance().Register(*this, irqId, true);
}
std::optional<bool> GenericTimer::InterruptTopHalfHandler(u32 irqId, u32)
{
if (irqId != GenericTimer::irqId) {
return std::nullopt;
}
// Mask the timer interrupt until reprogrammed
Configure(false, false);
return false;
}
void GenericTimer::WaitTicks(s64 ticks)
{
IrqManager::EnterInterruptibleHypervisorCode();
auto flags = cpu::UnmaskIrq();
SetTimeoutTicks(ticks);
do {
cpu::wfi();
} while (!GetInterruptStatus());
cpu::RestoreInterruptFlags(flags);
}
}

103
thermosphere/src/hvisor_generic_timer.hpp Normal file
View file

@ -0,0 +1,103 @@
/*
* Copyright (c) 2019-2020 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/>.
*/
#pragma once
#include "defines.hpp"
#include "hvisor_i_interrupt_task.hpp"
#include "cpu/hvisor_cpu_sysreg_general.hpp"
#include "preprocessor.h"
#include "platform/interrupt_config.h"
#include <chrono>
namespace ams::hvisor {
class GenericTimer final : public IInterruptTask {
SINGLETON(GenericTimer);
private:
static constexpr u32 irqId = GIC_IRQID_NS_PHYS_HYP_TIMER;
private:
static void Configure(bool enabled, bool interruptMasked)
{
u64 ebit = enabled ? cpu::CNTCTL_ENABLE : 0;
u64 mbit = interruptMasked ? cpu::CNTCTL_IMASK: 0;
THERMOSPHERE_SET_SYSREG(cnthp_ctl_el2, mbit | ebit);
}
static bool GetInterruptStatus()
{
return (THERMOSPHERE_GET_SYSREG(cnthp_ctl_el2) & cpu::CNTCTL_ISTATUS) != 0;
}
private:
u64 m_timerFreq = 0;
private:
constexpr GenericTimer() = default;
public:
static s64 GetSystemTick()
{
return static_cast<s64>(THERMOSPHERE_GET_SYSREG(cntpct_el0));
}
static void SetTimeoutTicks(s64 ticks)
{
THERMOSPHERE_SET_SYSREG(cnthp_cval_el2, GetSystemTick() + ticks);
Configure(true, false);
}
static void WaitTicks(s64 ticks);
public:
void Initialize();
std::optional<bool> InterruptTopHalfHandler(u32 irqId, u32) final;
constexpr u64 GetTimerFrequency() const { return m_timerFreq; }
template<typename SecondRatio = std::ratio<1>>
auto GetSystemTime() const
{
auto tick = GetSystemTick();
return (tick * SecondRatio::den) / (m_timerFreq * SecondRatio::num);
}
std::chrono::nanoseconds GetSystemTimeNs() const
{
return std::chrono::nanoseconds{GetSystemTime<std::nano>()};
}
template<typename Duration>
void SetTimeout(Duration d) const
{
using SecondRatio = typename Duration::period;
auto v = (d.count() * m_timerFreq * SecondRatio::num) / SecondRatio::den;
SetTimeoutTicks(v);
}
template<typename Duration>
void Wait(Duration d) const
{
using SecondRatio = typename Duration::period;
auto v = (d.count() * m_timerFreq * SecondRatio::num) / SecondRatio::den;
WaitTicks(v);
}
};
}

46
thermosphere/src/timer.c
View file

@ -1,46 +0,0 @@
/*
* Copyright (c) 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 "timer.h"
#include "irq.h"
#include "exceptions.h"
u64 g_timerFreq = 0;
void timerInit(void)
{
timerConfigure(false, false);
if (currentCoreCtx->isBootCore) {
g_timerFreq = GET_SYSREG(cntfrq_el0);
}
}
void timerInterruptHandler(void)
{
// Mask the timer interrupt until reprogrammed
timerConfigure(false, false);
}
void timerWaitUsecs(u64 us)
{
exceptionEnterInterruptibleHypervisorCode();
u64 mask = unmaskIrq();
timerSetTimeoutUs(us);
do {
__wfi();
} while (!timerGetInterruptStatus());
restoreInterruptFlags(mask);
}

108
thermosphere/src/timer.h
View file

@ -1,108 +0,0 @@
/*
* Copyright (c) 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/>.
*/
#pragma once
#include "utils.h"
#include "sysreg.h"
#include "platform/interrupt_config.h"
#define SECTONSECS 1000000000ull
#define SECTOUSECS 1000000ull
#define SECTOMSECS 1000ull
// All generic timers possibly defined in the Arm architecture:
// (suffix, time source suffix, level, irqid)
#define NS_PHYS_TIMER (p, p, 0, GIC_IRQID_NS_PHYS_TIMER)
#define NS_VIRT_TIMER (v, v, 0, GIC_IRQID_NS_VIRT_TIMER)
#define NS_PHYS_HYP_TIMER (hp, p, 2, GIC_IRQID_NS_PHYS_HYP_TIMER)
#define NS_VIRT_HYP_TIMER (hv, v, 2, GIC_IRQID_NS_VIRT_HYP_TIMER)
#define SEC_PHYS_TIMER (ps, p, 1, GIC_IRQID_SEC_PHYS_TIMER)
#define SEC_PHYS_HYP_TIMER (hps, p, 2, GIC_IRQID_SEC_PHYS_HYP_TIMER)
#define SEC_VIRT_HYP_TIMER (hvs, v, 2, GIC_IRQID_SEC_VIRT_HYP_TIMER)
#define TIMER_IRQID_FIELDS(ign, ign2, ign3, id) id
#define TIMER_COUNTER_REG_FIELDS(ign, ts, ign2, ign3) cnt##ts##ct_el0
#define TIMER_CTL_REG_FIELDS(t, ign, el, ign2) cnt##t##_ctl_el##el
#define TIMER_CVAL_REG_FIELDS(t, ign, el, ign2) cnt##t##_cval_el##el
#define TIMER_TVAL_REG_FIELDS(t, ign, el, ign2) cnt##t##_tval_el##el
#define TIMER_IRQID(name) EVAL(TIMER_IRQID_FIELDS name)
#define TIMER_COUNTER_REG(name) EVAL(TIMER_COUNTER_REG_FIELDS name)
#define TIMER_CTL_REG(name) EVAL(TIMER_CTL_REG_FIELDS name)
#define TIMER_CVAL_REG(name) EVAL(TIMER_CVAL_REG_FIELDS name)
#define TIMER_TVAL_REG(name) EVAL(TIMER_TVAL_REG_FIELDS name)
#define TIMER_CTL_ISTATUS BITL(2)
#define TIMER_CTL_IMASK BITL(1)
#define TIMER_CTL_ENABLE BITL(0)
#define CURRENT_TIMER NS_PHYS_HYP_TIMER
extern u64 g_timerFreq;
void timerInit(void);
void timerInterruptHandler(void);
static inline u64 timerGetSystemTick(void)
{
return GET_SYSREG(TIMER_COUNTER_REG(CURRENT_TIMER));
}
static inline bool timerGetInterruptStatus(void)
{
return (GET_SYSREG(TIMER_CTL_REG(CURRENT_TIMER)) & TIMER_CTL_ISTATUS) != 0;
}
static inline u64 timerGetSystemTimeNs(void)
{
return timerGetSystemTick() * SECTONSECS / g_timerFreq;
}
static inline u64 timerGetSystemTimeMs(void)
{
return timerGetSystemTick() * SECTOMSECS / g_timerFreq;
}
static inline void timerConfigure(bool enabled, bool interruptMasked)
{
u64 ebit = enabled ? TIMER_CTL_ENABLE : 0;
u64 mbit = interruptMasked ? TIMER_CTL_IMASK : 0;
SET_SYSREG(TIMER_CTL_REG(CURRENT_TIMER), mbit | ebit);
}
static inline void timerSetTimeoutTicks(u64 ticks)
{
SET_SYSREG(TIMER_CVAL_REG(CURRENT_TIMER), timerGetSystemTick() + ticks);
timerConfigure(true, false);
}
static inline void timerSetTimeoutNs(u64 ns)
{
timerSetTimeoutTicks(ns * g_timerFreq / SECTONSECS);
}
static inline void timerSetTimeoutMs(u64 ms)
{
timerSetTimeoutTicks(ms * g_timerFreq / SECTOMSECS);
}
static inline void timerSetTimeoutUs(u64 us)
{
timerSetTimeoutTicks(us * g_timerFreq / SECTOUSECS);
}
void timerWaitUsecs(u64 us);