]>
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 | * | |
2d1c645c | 8 | * Copyright (C) 2001 - 2008 Tensilica Inc. |
9a8fd558 CZ |
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 | ||
0f7f9310 MF |
22 | #if XCHAL_NUM_TIMERS > 0 && \ |
23 | INTLEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL | |
9a8fd558 | 24 | # define LINUX_TIMER 0 |
173d6681 | 25 | # define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT |
0f7f9310 MF |
26 | #elif XCHAL_NUM_TIMERS > 1 && \ |
27 | INTLEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL | |
9a8fd558 | 28 | # define LINUX_TIMER 1 |
173d6681 | 29 | # define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT |
0f7f9310 MF |
30 | #elif XCHAL_NUM_TIMERS > 2 && \ |
31 | INTLEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL | |
9a8fd558 | 32 | # define LINUX_TIMER 2 |
173d6681 | 33 | # define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT |
9a8fd558 CZ |
34 | #else |
35 | # error "Bad timer number for Linux configurations!" | |
36 | #endif | |
37 | ||
e504c4b6 | 38 | extern unsigned long ccount_freq; |
9a8fd558 CZ |
39 | |
40 | typedef unsigned long long cycles_t; | |
41 | ||
42 | /* | |
43 | * Only used for SMP. | |
44 | */ | |
45 | ||
46 | extern cycles_t cacheflush_time; | |
47 | ||
48 | #define get_cycles() (0) | |
49 | ||
50 | ||
51 | /* | |
52 | * Register access. | |
53 | */ | |
54 | ||
bc5378fc MF |
55 | #define WSR_CCOUNT(r) asm volatile ("wsr %0, ccount" :: "a" (r)) |
56 | #define RSR_CCOUNT(r) asm volatile ("rsr %0, ccount" : "=a" (r)) | |
57 | #define WSR_CCOMPARE(x,r) asm volatile ("wsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) :: "a"(r)) | |
58 | #define RSR_CCOMPARE(x,r) asm volatile ("rsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) : "=a"(r)) | |
9a8fd558 CZ |
59 | |
60 | static inline unsigned long get_ccount (void) | |
61 | { | |
62 | unsigned long ccount; | |
63 | RSR_CCOUNT(ccount); | |
64 | return ccount; | |
65 | } | |
66 | ||
67 | static inline void set_ccount (unsigned long ccount) | |
68 | { | |
69 | WSR_CCOUNT(ccount); | |
70 | } | |
71 | ||
72 | static inline unsigned long get_linux_timer (void) | |
73 | { | |
74 | unsigned ccompare; | |
75 | RSR_CCOMPARE(LINUX_TIMER, ccompare); | |
76 | return ccompare; | |
77 | } | |
78 | ||
79 | static inline void set_linux_timer (unsigned long ccompare) | |
80 | { | |
81 | WSR_CCOMPARE(LINUX_TIMER, ccompare); | |
82 | } | |
83 | ||
84 | #endif /* __KERNEL__ */ | |
85 | #endif /* _XTENSA_TIMEX_H */ |