rtcmmio.c File Reference

#include <Drivers/rtcmmio.h>
#include <Hal/AA64/gic.h>
#include <aucon.h>
#include <Drivers/rtc.h>
#include <string.h>
#include <Hal/AA64/aa64lowlevel.h>

Include dependency graph for rtcmmio.c:

Macros
#define	QEMU_VIRT_RTCIRQ   2
#define	PL031_RTC_MR   0x04
#define	PL031_RTC_LR   0x08
#define	PL031_RTC_CR   0x0C
#define	PL031_RTC_CR_EN_BIT   (1<<0)
#define	PL031_RTC_CR_IE_BIT   (1<<1)
#define	rtc_write32(addr, value)   (*(volatile uint32_t*)(addr) = (value))
#define	rtc_read32(addr)   (*(volatile uint32_t*)(addr))

Functions
void	AuRTCEnableInterrupt ()
	AuRTCEnableInterrupt – enable pl031 rtc.
uint32_t	AuRTCGetCurrentTime ()
	AuRTCGetCurrentTime – returns thr current time value.
void	AuRTCClearInterrupt ()
	AuRTCClearInterrupt – clear pending rtc interrupt.
int	is_leap (int year)
void	epoch_to_tm (uint32_t epoch)
	epoch_to_tm – convert unix epoch value to time
void	AuPL031RTCIRQHandle ()
	AuPL031RTCIRQHandler – irq handler of PL031 RTC.
void	AuPL031RTCInit ()
	AuPL031RTCInit – initialize pl031 rtc [NOT USED].
uint8_t	AuRTCGetYear ()
	AuRTCGetYear – returns the current year.
uint8_t	AuRTCGetCentury ()
	AuRTCGetCentury – returns the current century.
uint8_t	AuRTCGetMinutes ()
	AuRTCGetMinutes – returns the current minutes.
uint8_t	AuRTCGetSecond ()
	AuRTCGetSecond – returns the current second.
uint8_t	AuRTCGetDay ()
	AuRTCGetDay – returns the current day.
uint8_t	AuRTCGetHour ()
uint8_t	AuRTCGetMonth ()
	AuRTCGetMonth – returns the current month.

Variables
AuRTC	__rtc

Detailed Description

BSD 2-Clause License

Copyright (c) 2022-2025, Manas Kamal Choudhury All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Macro Definition Documentation

PL031_RTC_CR

#define PL031_RTC_CR   0x0C

PL031_RTC_CR_EN_BIT

#define PL031_RTC_CR_EN_BIT   (1<<0)

PL031_RTC_CR_IE_BIT

#define PL031_RTC_CR_IE_BIT   (1<<1)

PL031_RTC_LR

#define PL031_RTC_LR   0x08

PL031_RTC_MR

#define PL031_RTC_MR   0x04

QEMU_VIRT_RTCIRQ

#define QEMU_VIRT_RTCIRQ   2

rtc_read32

#define rtc_read32

(

addr

)

(*(volatile uint32_t*)(addr))

rtc_write32

#define rtc_write32	(		addr,
			value
	)		(*(volatile uint32_t*)(addr) = (value))

Function Documentation

AuPL031RTCInit()

void AuPL031RTCInit

(

)

AuPL031RTCInit – initialize pl031 rtc [NOT USED].

AuPL031RTCIRQHandle()

void AuPL031RTCIRQHandle

(

)

AuPL031RTCIRQHandler – irq handler of PL031 RTC.

AuRTCClearInterrupt()

void AuRTCClearInterrupt

(

)

AuRTCClearInterrupt – clear pending rtc interrupt.

AuRTCEnableInterrupt()

void AuRTCEnableInterrupt

(

)

AuRTCEnableInterrupt – enable pl031 rtc.

AuRTCGetCentury()

uint8_t AuRTCGetCentury

(

)

AuRTCGetCentury – returns the current century.

Returns

return century value

AuRTCGetCurrentTime()

uint32_t AuRTCGetCurrentTime

(

)

AuRTCGetCurrentTime – returns thr current time value.

Returns

return current time value

AuRTCGetDay()

uint8_t AuRTCGetDay

(

)

AuRTCGetDay – returns the current day.

Returns

return current day value

AuRTCGetHour()

uint8_t AuRTCGetHour

(

)

AuRTCGetMinutes()

uint8_t AuRTCGetMinutes

(

)

AuRTCGetMinutes – returns the current minutes.

Returns

return minute value

AuRTCGetMonth()

uint8_t AuRTCGetMonth

(

)

AuRTCGetMonth – returns the current month.

AuRTCGetSecond()

uint8_t AuRTCGetSecond

(

)

AuRTCGetSecond – returns the current second.

Returns

return current second value

AuRTCGetYear()

uint8_t AuRTCGetYear

(

)

AuRTCGetYear – returns the current year.

Returns

return year value

epoch_to_tm()

void epoch_to_tm

(

uint32_t

epoch

)

epoch_to_tm – convert unix epoch value to time

Parameters

epoch

– unix epoch value

is_leap()

int is_leap

(

int

year

)

Variable Documentation

__rtc

AuRTC __rtc