linux_dsm_epyc7002/arch/xtensa/include/asm/timex.h
Max Filippov f615136c06 xtensa: add SMP support
This is largely based on SMP code from the xtensa-2.6.29-smp tree by
Piet Delaney, Marc Gauthier, Joe Taylor, Christian Zankel (and possibly
other Tensilica folks).

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14 10:19:58 -08:00

76 lines
1.9 KiB
C

/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2001 - 2013 Tensilica Inc.
*/
#ifndef _XTENSA_TIMEX_H
#define _XTENSA_TIMEX_H
#include <asm/processor.h>
#include <linux/stringify.h>
#define _INTLEVEL(x) XCHAL_INT ## x ## _LEVEL
#define INTLEVEL(x) _INTLEVEL(x)
#if XCHAL_NUM_TIMERS > 0 && \
INTLEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL
# define LINUX_TIMER 0
# define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT
#elif XCHAL_NUM_TIMERS > 1 && \
INTLEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL
# define LINUX_TIMER 1
# define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT
#elif XCHAL_NUM_TIMERS > 2 && \
INTLEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL
# define LINUX_TIMER 2
# define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT
#else
# error "Bad timer number for Linux configurations!"
#endif
extern unsigned long ccount_freq;
typedef unsigned long long cycles_t;
#define get_cycles() (0)
void local_timer_setup(unsigned cpu);
/*
* Register access.
*/
#define WSR_CCOUNT(r) asm volatile ("wsr %0, ccount" :: "a" (r))
#define RSR_CCOUNT(r) asm volatile ("rsr %0, ccount" : "=a" (r))
#define WSR_CCOMPARE(x,r) asm volatile ("wsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) :: "a"(r))
#define RSR_CCOMPARE(x,r) asm volatile ("rsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) : "=a"(r))
static inline unsigned long get_ccount (void)
{
unsigned long ccount;
RSR_CCOUNT(ccount);
return ccount;
}
static inline void set_ccount (unsigned long ccount)
{
WSR_CCOUNT(ccount);
}
static inline unsigned long get_linux_timer (void)
{
unsigned ccompare;
RSR_CCOMPARE(LINUX_TIMER, ccompare);
return ccompare;
}
static inline void set_linux_timer (unsigned long ccompare)
{
WSR_CCOMPARE(LINUX_TIMER, ccompare);
}
#endif /* _XTENSA_TIMEX_H */