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112 lines
3 KiB
C
112 lines
3 KiB
C
/*
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* Copyright (c) 2018-2020 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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#ifndef EXOSPHERE_TIMERS_H
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#define EXOSPHERE_TIMERS_H
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#include <stdint.h>
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#include "memory_map.h"
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/* Exosphere driver for the Tegra X1 Timers. */
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static inline uintptr_t get_timers_base(void) {
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return MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_TMRs_WDTs);
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}
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static inline uintptr_t get_rtc_base(void) {
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return MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_RTC_PMC);
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}
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#define TIMERS_BASE (get_timers_base())
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#define MAKE_TIMERS_REG(n) MAKE_REG32(TIMERS_BASE + n)
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#define TIMERUS_CNTR_1US_0 MAKE_TIMERS_REG(0x10)
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#define TIMERUS_USEC_CFG_0 MAKE_TIMERS_REG(0x14)
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#define SHARED_INTR_STATUS_0 MAKE_TIMERS_REG(0x1A0)
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#define SHARED_TIMER_SECURE_CFG_0 MAKE_TIMERS_REG(0x1A4)
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#define RTC_BASE (get_rtc_base())
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#define MAKE_RTC_REG(n) MAKE_REG32(RTC_BASE + n)
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#define RTC_SECONDS MAKE_RTC_REG(0x08)
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#define RTC_SHADOW_SECONDS MAKE_RTC_REG(0x0C)
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#define RTC_MILLI_SECONDS MAKE_RTC_REG(0x10)
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typedef struct {
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uint32_t CONFIG;
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uint32_t STATUS;
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uint32_t COMMAND;
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uint32_t PATTERN;
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} watchdog_timers_t;
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#define GET_WDT(n) ((volatile watchdog_timers_t *)(TIMERS_BASE + 0x100 + 0x20 * n))
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#define WDT_REBOOT_PATTERN 0xC45A
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#define GET_WDT_REBOOT_CFG_REG(n) MAKE_REG32(TIMERS_BASE + 0x60 + 0x8 * n)
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void wait(uint32_t microseconds);
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static inline uint32_t get_time_s(void) {
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return RTC_SECONDS;
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}
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static inline uint32_t get_time_ms(void) {
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return (RTC_MILLI_SECONDS | (RTC_SHADOW_SECONDS << 10));
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}
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static inline uint32_t get_time_us(void) {
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return TIMERUS_CNTR_1US_0;
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}
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/**
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* Returns the time in microseconds.
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*/
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static inline uint32_t get_time(void) {
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return get_time_us();
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}
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/**
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* Returns the number of microseconds that have passed since a given get_time().
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*/
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static inline uint32_t get_time_since(uint32_t base) {
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return get_time_us() - base;
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}
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/**
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* Delays for a given number of microseconds.
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*/
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static inline void udelay(uint32_t usecs) {
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uint32_t start = get_time_us();
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while (get_time_us() - start < usecs);
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}
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/**
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* Delays until a number of usecs have passed since an absolute start time.
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*/
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static inline void udelay_absolute(uint32_t start, uint32_t usecs) {
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while (get_time_us() - start < usecs);
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}
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/**
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* Delays for a given number of milliseconds.
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*/
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static inline void mdelay(uint32_t msecs) {
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uint32_t start = get_time_ms();
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while (get_time_ms() - start < msecs);
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}
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__attribute__ ((noreturn)) void watchdog_reboot(void);
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#endif
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