Commit a491e203 authored by Mao Minkai's avatar Mao Minkai Committed by guzitao
Browse files

sw64: add timer support 

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8Y8CY



--------------------------------

Add timer for basic SW64 support.

Signed-off-by: default avatarMao Minkai <maominkai@wxiat.com>
Reviewed-by: default avatarHe Sheng <hesheng@wxiat.com>
Signed-off-by: default avatarGu Zitao <guzitao@wxiat.com>
parent 4549f1fd

arch/sw_64/include/asm/tc.h

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/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _ASM_SW64_TC_H

#define _ASM_SW64_TC_H



static inline unsigned long rdtc(void)

{

	unsigned long ret;



	__asm__ __volatile__ ("rtc %0" : "=r"(ret));

	return ret;

}



extern void tc_sync_clear(void);

extern void tc_sync_ready(void *ignored);

extern void tc_sync_set(void);

#endif /* _ASM_SW64_TC_H */

arch/sw_64/include/asm/timer.h

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/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _ASM_SW64_TIMER_H

#define _ASM_SW64_TIMER_H



extern void sw64_setup_clocksource(void);



extern void sw64_setup_timer(void);



extern void __init setup_sched_clock(void);



#endif /* _ASM_SW64_TIMER_H */

arch/sw_64/include/asm/timex.h

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/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _ASM_SW64_TIMEX_H

#define _ASM_SW64_TIMEX_H



#include <asm/tc.h>



/* With only one or two oddballs, we use the RTC as the ticker, selecting

 * the 32.768kHz reference clock, which nicely divides down to our HZ.

 */

#define CLOCK_TICK_RATE	32768



/*

 * Standard way to access the cycle counter.

 */



typedef unsigned long cycles_t;



static inline cycles_t get_cycles(void)

{

	return rdtc();

}



#endif /* _ASM_SW64_TIMEX_H */