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/* * 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> #if XCHAL_NUM_TIMERS > 0 && \ XTENSA_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL # define LINUX_TIMER 0 # define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT #elif XCHAL_NUM_TIMERS > 1 && \ XTENSA_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL # define LINUX_TIMER 1 # define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT #elif XCHAL_NUM_TIMERS > 2 && \ XTENSA_INT_LEVEL(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 */