1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2001 - 2013 Tensilica Inc. 7 */ 8 9#ifndef _XTENSA_TIMEX_H 10#define _XTENSA_TIMEX_H 11 12#include <asm/processor.h> 13#include <linux/stringify.h> 14 15#define _INTLEVEL(x) XCHAL_INT ## x ## _LEVEL 16#define INTLEVEL(x) _INTLEVEL(x) 17 18#if XCHAL_NUM_TIMERS > 0 && \ 19 INTLEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL 20# define LINUX_TIMER 0 21# define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT 22#elif XCHAL_NUM_TIMERS > 1 && \ 23 INTLEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL 24# define LINUX_TIMER 1 25# define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT 26#elif XCHAL_NUM_TIMERS > 2 && \ 27 INTLEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL 28# define LINUX_TIMER 2 29# define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT 30#else 31# error "Bad timer number for Linux configurations!" 32#endif 33 34extern unsigned long ccount_freq; 35 36typedef unsigned long long cycles_t; 37 38#define get_cycles() (0) 39 40void local_timer_setup(unsigned cpu); 41 42/* 43 * Register access. 44 */ 45 46#define WSR_CCOUNT(r) asm volatile ("wsr %0, ccount" :: "a" (r)) 47#define RSR_CCOUNT(r) asm volatile ("rsr %0, ccount" : "=a" (r)) 48#define WSR_CCOMPARE(x,r) asm volatile ("wsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) :: "a"(r)) 49#define RSR_CCOMPARE(x,r) asm volatile ("rsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) : "=a"(r)) 50 51static inline unsigned long get_ccount (void) 52{ 53 unsigned long ccount; 54 RSR_CCOUNT(ccount); 55 return ccount; 56} 57 58static inline void set_ccount (unsigned long ccount) 59{ 60 WSR_CCOUNT(ccount); 61} 62 63static inline unsigned long get_linux_timer (void) 64{ 65 unsigned ccompare; 66 RSR_CCOMPARE(LINUX_TIMER, ccompare); 67 return ccompare; 68} 69 70static inline void set_linux_timer (unsigned long ccompare) 71{ 72 WSR_CCOMPARE(LINUX_TIMER, ccompare); 73} 74 75#endif /* _XTENSA_TIMEX_H */ 76