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 typedef unsigned long long cycles_t;
33 
34 #define get_cycles()	(0)
35 
36 void local_timer_setup(unsigned cpu);
37 
38 /*
39  * Register access.
40  */
41 
get_ccount(void)42 static inline unsigned long get_ccount (void)
43 {
44 	return xtensa_get_sr(ccount);
45 }
46 
set_ccount(unsigned long ccount)47 static inline void set_ccount (unsigned long ccount)
48 {
49 	xtensa_set_sr(ccount, ccount);
50 }
51 
get_linux_timer(void)52 static inline unsigned long get_linux_timer (void)
53 {
54 	return xtensa_get_sr(SREG_CCOMPARE + LINUX_TIMER);
55 }
56 
set_linux_timer(unsigned long ccompare)57 static inline void set_linux_timer (unsigned long ccompare)
58 {
59 	xtensa_set_sr(ccompare, SREG_CCOMPARE + LINUX_TIMER);
60 }
61 
62 #endif	/* _XTENSA_TIMEX_H */
63