projects / linux-block.git / blame
| 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 | ||
| 19 | #if XCHAL_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) == 1 | |
| 20 | # define LINUX_TIMER 0 | |
| 21 | #elif XCHAL_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) == 1 | |
| 22 | # define LINUX_TIMER 1 | |
| 23 | #elif XCHAL_INT_LEVEL(XCHAL_TIMER2_INTERRUPT) == 1 | |
| 24 | # define LINUX_TIMER 2 | |
| 25 | #else | |
| 26 | # error "Bad timer number for Linux configurations!" | |
| 27 | #endif | |
| 28 | ||
| 29 | #define LINUX_TIMER_INT XCHAL_TIMER_INTERRUPT(LINUX_TIMER) | |
| 30 | #define LINUX_TIMER_MASK (1L << LINUX_TIMER_INT) | |
| 31 | ||
| 32 | #define CLOCK_TICK_RATE 1193180 /* (everyone is using this value) */ | |
| 33 | #define CLOCK_TICK_FACTOR 20 /* Factor of both 10^6 and CLOCK_TICK_RATE */ | |
| 9a8fd558 CZ |
34 | |
| 35 | #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT | |
| 36 | extern unsigned long ccount_per_jiffy; | |
| 37 | extern unsigned long ccount_nsec; | |
| 38 | #define CCOUNT_PER_JIFFY ccount_per_jiffy | |
| 39 | #define CCOUNT_NSEC ccount_nsec | |
| 40 | #else | |
| 41 | #define CCOUNT_PER_JIFFY (CONFIG_XTENSA_CPU_CLOCK*(1000000UL/HZ)) | |
| 42 | #define CCOUNT_NSEC (1000000000UL / CONFIG_XTENSA_CPU_CLOCK) | |
| 43 | #endif | |
| 44 | ||
| 45 | ||
| 46 | typedef unsigned long long cycles_t; | |
| 47 | ||
| 48 | /* | |
| 49 | * Only used for SMP. | |
| 50 | */ | |
| 51 | ||
| 52 | extern cycles_t cacheflush_time; | |
| 53 | ||
| 54 | #define get_cycles() (0) | |
| 55 | ||
| 56 | ||
| 57 | /* | |
| 58 | * Register access. | |
| 59 | */ | |
| 60 | ||
| 61 | #define WSR_CCOUNT(r) __asm__("wsr %0,"__stringify(CCOUNT) :: "a" (r)) | |
| 62 | #define RSR_CCOUNT(r) __asm__("rsr %0,"__stringify(CCOUNT) : "=a" (r)) | |
| 63 | #define WSR_CCOMPARE(x,r) __asm__("wsr %0,"__stringify(CCOMPARE_0)"+"__stringify(x) :: "a"(r)) | |
| 64 | #define RSR_CCOMPARE(x,r) __asm__("rsr %0,"__stringify(CCOMPARE_0)"+"__stringify(x) : "=a"(r)) | |
| 65 | ||
| 66 | static inline unsigned long get_ccount (void) | |
| 67 | { | |
| 68 | unsigned long ccount; | |
| 69 | RSR_CCOUNT(ccount); | |
| 70 | return ccount; | |
| 71 | } | |
| 72 | ||
| 73 | static inline void set_ccount (unsigned long ccount) | |
| 74 | { | |
| 75 | WSR_CCOUNT(ccount); | |
| 76 | } | |
| 77 | ||
| 78 | static inline unsigned long get_linux_timer (void) | |
| 79 | { | |
| 80 | unsigned ccompare; | |
| 81 | RSR_CCOMPARE(LINUX_TIMER, ccompare); | |
| 82 | return ccompare; | |
| 83 | } | |
| 84 | ||
| 85 | static inline void set_linux_timer (unsigned long ccompare) | |
| 86 | { | |
| 87 | WSR_CCOMPARE(LINUX_TIMER, ccompare); | |
| 88 | } | |
| 89 | ||
| 90 | #endif /* __KERNEL__ */ | |
| 91 | #endif /* _XTENSA_TIMEX_H */ |