arch/xtensa/include/asm/timex.h

   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
  14 #if XCHAL_NUM_TIMERS > 0 && \
  15         XTENSA_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL
  16 # define LINUX_TIMER     0
  17 # define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT
  18 #elif XCHAL_NUM_TIMERS > 1 && \
  19         XTENSA_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL
  20 # define LINUX_TIMER     1
  21 # define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT
  22 #elif XCHAL_NUM_TIMERS > 2 && \
  23         XTENSA_INT_LEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL
  24 # define LINUX_TIMER     2
  25 # define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT
  26 #else
  27 # error "Bad timer number for Linux configurations!"
  28 #endif
  29
  30 extern unsigned long ccount_freq;
  31
  32 void local_timer_setup(unsigned cpu);
  33
  34 /*
  35  * Register access.
  36  */
  37
  38 static inline unsigned long get_ccount (void)
  39 {
  40         return xtensa_get_sr(ccount);
  41 }
  42
  43 static inline void set_ccount (unsigned long ccount)
  44 {
  45         xtensa_set_sr(ccount, ccount);
  46 }
  47
  48 static inline unsigned long get_linux_timer (void)
  49 {
  50         return xtensa_get_sr(SREG_CCOMPARE + LINUX_TIMER);
  51 }
  52
  53 static inline void set_linux_timer (unsigned long ccompare)
  54 {
  55         xtensa_set_sr(ccompare, SREG_CCOMPARE + LINUX_TIMER);
  56 }
  57
  58 #include <asm-generic/timex.h>
  59
  60 #endif  /* _XTENSA_TIMEX_H */