mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-15 09:36:35 +00:00
626f0ecb98
- use recursive stage 1 page table (thanks @fincs for this idea) - NULL now unmapped - no identity mapping - image + GICv2 now mapped at the same address for every platform - tempbss mapped just after "real" bss, can now steal unused mem from the latter - no hardcoded VAs for other MMIO devices - tegra: remove timers, use the generic timer instead
108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
/*
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* Copyright (c) 2019 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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#pragma once
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#include "utils.h"
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#include "sysreg.h"
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#include "platform/interrupt_config.h"
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#define SECTONSECS 1000000000ull
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#define SECTOUSECS 1000000ull
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#define SECTOMSECS 1000ull
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// All generic timers possibly defined in the Arm architecture:
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// (suffix, time source suffix, level, irqid)
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#define NS_PHYS_TIMER (p, p, 0, GIC_IRQID_NS_PHYS_TIMER)
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#define NS_VIRT_TIMER (v, v, 0, GIC_IRQID_NS_VIRT_TIMER)
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#define NS_PHYS_HYP_TIMER (hp, p, 2, GIC_IRQID_NS_PHYS_HYP_TIMER)
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#define NS_VIRT_HYP_TIMER (hv, v, 2, GIC_IRQID_NS_VIRT_HYP_TIMER)
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#define SEC_PHYS_TIMER (ps, p, 1, GIC_IRQID_SEC_PHYS_TIMER)
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#define SEC_PHYS_HYP_TIMER (hps, p, 2, GIC_IRQID_SEC_PHYS_HYP_TIMER)
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#define SEC_VIRT_HYP_TIMER (hvs, v, 2, GIC_IRQID_SEC_VIRT_HYP_TIMER)
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#define TIMER_IRQID_FIELDS(ign, ign2, ign3, id) id
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#define TIMER_COUNTER_REG_FIELDS(ign, ts, ign2, ign3) cnt##ts##ct_el0
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#define TIMER_CTL_REG_FIELDS(t, ign, el, ign2) cnt##t##_ctl_el##el
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#define TIMER_CVAL_REG_FIELDS(t, ign, el, ign2) cnt##t##_cval_el##el
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#define TIMER_TVAL_REG_FIELDS(t, ign, el, ign2) cnt##t##_tval_el##el
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#define TIMER_IRQID(name) EVAL(TIMER_IRQID_FIELDS name)
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#define TIMER_COUNTER_REG(name) EVAL(TIMER_COUNTER_REG_FIELDS name)
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#define TIMER_CTL_REG(name) EVAL(TIMER_CTL_REG_FIELDS name)
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#define TIMER_CVAL_REG(name) EVAL(TIMER_CVAL_REG_FIELDS name)
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#define TIMER_TVAL_REG(name) EVAL(TIMER_TVAL_REG_FIELDS name)
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#define TIMER_CTL_ISTATUS BITL(2)
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#define TIMER_CTL_IMASK BITL(1)
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#define TIMER_CTL_ENABLE BITL(0)
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#define CURRENT_TIMER NS_PHYS_HYP_TIMER
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extern u64 g_timerFreq;
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void timerInit(void);
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void timerInterruptHandler(void);
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static inline u64 timerGetSystemTick(void)
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{
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return GET_SYSREG(TIMER_COUNTER_REG(CURRENT_TIMER));
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}
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static inline bool timerGetInterruptStatus(void)
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{
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return (GET_SYSREG(TIMER_CTL_REG(CURRENT_TIMER)) & TIMER_CTL_ISTATUS) != 0;
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}
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static inline u64 timerGetSystemTimeNs(void)
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{
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return timerGetSystemTick() * SECTONSECS / g_timerFreq;
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}
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static inline u64 timerGetSystemTimeMs(void)
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{
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return timerGetSystemTick() * SECTOMSECS / g_timerFreq;
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}
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static inline void timerConfigure(bool enabled, bool interruptMasked)
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{
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u64 ebit = enabled ? TIMER_CTL_ENABLE : 0;
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u64 mbit = interruptMasked ? TIMER_CTL_IMASK : 0;
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SET_SYSREG(TIMER_CTL_REG(CURRENT_TIMER), mbit | ebit);
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}
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static inline void timerSetTimeoutTicks(u64 ticks)
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{
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SET_SYSREG(TIMER_CVAL_REG(CURRENT_TIMER), timerGetSystemTick() + ticks);
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timerConfigure(true, false);
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}
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static inline void timerSetTimeoutNs(u64 ns)
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{
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timerSetTimeoutTicks(ns * g_timerFreq / SECTONSECS);
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}
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static inline void timerSetTimeoutMs(u64 ms)
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{
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timerSetTimeoutTicks(ms * g_timerFreq / SECTOMSECS);
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}
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static inline void timerSetTimeoutUs(u64 us)
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{
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timerSetTimeoutTicks(us * g_timerFreq / SECTOUSECS);
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}
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void timerWaitUsecs(u64 us);
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