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#if XCHAL_NUM_TIMERS > 0 && \ 16 XTENSA_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL 17# define LINUX_TIMER 0 18# define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT 19#elif XCHAL_NUM_TIMERS > 1 && \ 20 XTENSA_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL 21# define LINUX_TIMER 1 22# define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT 23#elif XCHAL_NUM_TIMERS > 2 && \ 24 XTENSA_INT_LEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL 25# define LINUX_TIMER 2 26# define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT 27#else 28# error "Bad timer number for Linux configurations!" 29#endif 30 31extern unsigned long ccount_freq; 32 33typedef unsigned long long cycles_t; 34 35#define get_cycles() (0) 36 37void local_timer_setup(unsigned cpu); 38 39/* 40 * Register access. 41 */ 42 43#define WSR_CCOUNT(r) asm volatile ("wsr %0, ccount" :: "a" (r)) 44#define RSR_CCOUNT(r) asm volatile ("rsr %0, ccount" : "=a" (r)) 45#define WSR_CCOMPARE(x,r) asm volatile ("wsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) :: "a"(r)) 46#define RSR_CCOMPARE(x,r) asm volatile ("rsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) : "=a"(r)) 47 48static inline unsigned long get_ccount (void) 49{ 50 unsigned long ccount; 51 RSR_CCOUNT(ccount); 52 return ccount; 53} 54 55static inline void set_ccount (unsigned long ccount) 56{ 57 WSR_CCOUNT(ccount); 58} 59 60static inline unsigned long get_linux_timer (void) 61{ 62 unsigned ccompare; 63 RSR_CCOMPARE(LINUX_TIMER, ccompare); 64 return ccompare; 65} 66 67static inline void set_linux_timer (unsigned long ccompare) 68{ 69 WSR_CCOMPARE(LINUX_TIMER, ccompare); 70} 71 72#endif /* _XTENSA_TIMEX_H */ 73