Commit | Line | Data |
---|---|---|
9a8fd558 CZ |
1 | /* |
2 | * include/asm-xtensa/timex.h | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General Public | |
5 | * License. See the file "COPYING" in the main directory of this archive | |
6 | * for more details. | |
7 | * | |
8 | * Copyright (C) 2001 - 2005 Tensilica Inc. | |
9 | */ | |
10 | ||
11 | #ifndef _XTENSA_TIMEX_H | |
12 | #define _XTENSA_TIMEX_H | |
13 | ||
14 | #ifdef __KERNEL__ | |
15 | ||
16 | #include <asm/processor.h> | |
17 | #include <linux/stringify.h> | |
18 | ||
173d6681 CZ |
19 | #define _INTLEVEL(x) XCHAL_INT ## x ## _LEVEL |
20 | #define INTLEVEL(x) _INTLEVEL(x) | |
21 | ||
22 | #if INTLEVEL(XCHAL_TIMER0_INTERRUPT) == 1 | |
9a8fd558 | 23 | # define LINUX_TIMER 0 |
173d6681 CZ |
24 | # define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT |
25 | #elif INTLEVEL(XCHAL_TIMER1_INTERRUPT) == 1 | |
9a8fd558 | 26 | # define LINUX_TIMER 1 |
173d6681 CZ |
27 | # define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT |
28 | #elif INTLEVEL(XCHAL_TIMER2_INTERRUPT) == 1 | |
9a8fd558 | 29 | # define LINUX_TIMER 2 |
173d6681 | 30 | # define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT |
9a8fd558 CZ |
31 | #else |
32 | # error "Bad timer number for Linux configurations!" | |
33 | #endif | |
34 | ||
9a8fd558 CZ |
35 | #define LINUX_TIMER_MASK (1L << LINUX_TIMER_INT) |
36 | ||
37 | #define CLOCK_TICK_RATE 1193180 /* (everyone is using this value) */ | |
38 | #define CLOCK_TICK_FACTOR 20 /* Factor of both 10^6 and CLOCK_TICK_RATE */ | |
9a8fd558 CZ |
39 | |
40 | #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT | |
41 | extern unsigned long ccount_per_jiffy; | |
42 | extern unsigned long ccount_nsec; | |
43 | #define CCOUNT_PER_JIFFY ccount_per_jiffy | |
2b8aea74 | 44 | #define NSEC_PER_CCOUNT ccount_nsec |
9a8fd558 CZ |
45 | #else |
46 | #define CCOUNT_PER_JIFFY (CONFIG_XTENSA_CPU_CLOCK*(1000000UL/HZ)) | |
2b8aea74 | 47 | #define NSEC_PER_CCOUNT (1000UL / CONFIG_XTENSA_CPU_CLOCK) |
9a8fd558 CZ |
48 | #endif |
49 | ||
50 | ||
51 | typedef unsigned long long cycles_t; | |
52 | ||
53 | /* | |
54 | * Only used for SMP. | |
55 | */ | |
56 | ||
57 | extern cycles_t cacheflush_time; | |
58 | ||
59 | #define get_cycles() (0) | |
60 | ||
61 | ||
62 | /* | |
63 | * Register access. | |
64 | */ | |
65 | ||
66 | #define WSR_CCOUNT(r) __asm__("wsr %0,"__stringify(CCOUNT) :: "a" (r)) | |
67 | #define RSR_CCOUNT(r) __asm__("rsr %0,"__stringify(CCOUNT) : "=a" (r)) | |
173d6681 CZ |
68 | #define WSR_CCOMPARE(x,r) __asm__("wsr %0,"__stringify(CCOMPARE)"+"__stringify(x) :: "a"(r)) |
69 | #define RSR_CCOMPARE(x,r) __asm__("rsr %0,"__stringify(CCOMPARE)"+"__stringify(x) : "=a"(r)) | |
9a8fd558 CZ |
70 | |
71 | static inline unsigned long get_ccount (void) | |
72 | { | |
73 | unsigned long ccount; | |
74 | RSR_CCOUNT(ccount); | |
75 | return ccount; | |
76 | } | |
77 | ||
78 | static inline void set_ccount (unsigned long ccount) | |
79 | { | |
80 | WSR_CCOUNT(ccount); | |
81 | } | |
82 | ||
83 | static inline unsigned long get_linux_timer (void) | |
84 | { | |
85 | unsigned ccompare; | |
86 | RSR_CCOMPARE(LINUX_TIMER, ccompare); | |
87 | return ccompare; | |
88 | } | |
89 | ||
90 | static inline void set_linux_timer (unsigned long ccompare) | |
91 | { | |
92 | WSR_CCOMPARE(LINUX_TIMER, ccompare); | |
93 | } | |
94 | ||
95 | #endif /* __KERNEL__ */ | |
96 | #endif /* _XTENSA_TIMEX_H */ |