db8c1ee9d0
The Cycle CouNTer on ARM cannot be used reliably as it wraps around rather quickly and can be altered by user space (on Minix). Furthermore, it's buggy when wrapping and is not implemented at all on the Linaro Beagleboard emulator. This patch programs GPTIMER10 as a free running clock at 1.625 MHz (it doesn't generate interrupts). It's memory mapped into every process, which enables libsys to provide micro_delay(). Change-Id: Iba004c6c62976762fe154ea390d69e518eec1531
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
#ifndef _MINIX_SYSUTIL_H
|
|
#define _MINIX_SYSUTIL_H 1
|
|
|
|
#include <minix/ipc.h>
|
|
#include <sys/cdefs.h>
|
|
|
|
/* Extra system library definitions to support device drivers and servers.
|
|
*
|
|
* Created:
|
|
* Mar 15, 2004 by Jorrit N. Herder
|
|
*
|
|
* Changes:
|
|
* May 31, 2005: added printf, kputc (relocated from syslib)
|
|
* May 31, 2005: added getuptime
|
|
* Mar 18, 2005: added tickdelay
|
|
* Oct 01, 2004: added env_parse, env_prefix, env_panic
|
|
* Jul 13, 2004: added fkey_ctl
|
|
* Apr 28, 2004: added report, panic
|
|
* Mar 31, 2004: setup like other libraries, such as syslib
|
|
*/
|
|
|
|
/*==========================================================================*
|
|
* Miscellaneous helper functions.
|
|
*==========================================================================*/
|
|
|
|
/* Environment parsing return values. */
|
|
#define EP_BUF_SIZE 128 /* local buffer for env value */
|
|
#define EP_UNSET 0 /* variable not set */
|
|
#define EP_OFF 1 /* var = off */
|
|
#define EP_ON 2 /* var = on (or field left blank) */
|
|
#define EP_SET 3 /* var = 1:2:3 (nonblank field) */
|
|
#define EP_EGETKENV 4 /* sys_getkenv() failed ... */
|
|
|
|
extern int env_argc;
|
|
extern char **env_argv;
|
|
|
|
void env_setargs(int argc, char *argv[]);
|
|
int env_get_param(char *key, char *value, int max_size);
|
|
int env_prefix(char *env, char *prefix);
|
|
void env_panic(char *key);
|
|
int env_parse(char *env, char *fmt, int field, long *param, long min,
|
|
long max);
|
|
|
|
#define fkey_map(fkeys, sfkeys) fkey_ctl(FKEY_MAP, (fkeys), (sfkeys))
|
|
#define fkey_unmap(fkeys, sfkeys) fkey_ctl(FKEY_UNMAP, (fkeys), (sfkeys))
|
|
#define fkey_events(fkeys, sfkeys) fkey_ctl(FKEY_EVENTS, (fkeys), (sfkeys))
|
|
int fkey_ctl(int req, int *fkeys, int *sfkeys);
|
|
|
|
int printf(const char *fmt, ...);
|
|
void kputc(int c);
|
|
__dead void panic(const char *fmt, ...);
|
|
int getuptime(clock_t *ticks);
|
|
int getuptime2(clock_t *ticks, time_t *boottime);
|
|
int tickdelay(clock_t ticks);
|
|
int tsc_calibrate(void);
|
|
u32_t sys_hz(void);
|
|
double getidle(void);
|
|
void util_stacktrace(void);
|
|
int micro_delay(u32_t micros);
|
|
u32_t tsc_64_to_micros(u64_t tsc);
|
|
u32_t tsc_to_micros(u32_t low, u32_t high);
|
|
u32_t tsc_get_khz(void);
|
|
u32_t micros_to_ticks(u32_t micros);
|
|
#if defined(__arm__)
|
|
u32_t read_frclock(void);
|
|
u32_t delta_frclock(u32_t base, u32_t cur);
|
|
u64_t read_frclock_64(void);
|
|
u64_t delta_frclock_64(u64_t base, u64_t cur);
|
|
#endif
|
|
void ser_putc(char c);
|
|
void get_randomness(struct k_randomness *, int);
|
|
u32_t sqrt_approx(u32_t);
|
|
|
|
#define asynsend(ep, msg) asynsend3(ep, msg, 0)
|
|
int asynsend3(endpoint_t ep, message *msg, int flags);
|
|
int asyn_geterror(endpoint_t *dst, message *msg, int *err);
|
|
|
|
#define ASSERT(c) if(!(c)) { panic("%s:%d: assert %s failed", __FILE__, __LINE__, #c); }
|
|
|
|
/* timing library */
|
|
#define TIMING_CATEGORIES 20
|
|
|
|
#define TIMING_POINTS 20 /* timing resolution */
|
|
#define TIMING_CATEGORIES 20
|
|
#define TIMING_NAME 10
|
|
|
|
struct util_timingdata {
|
|
char names[TIMING_NAME];
|
|
unsigned long lock_timings[TIMING_POINTS];
|
|
unsigned long lock_timings_range[2];
|
|
unsigned long binsize, resets, misses, measurements;
|
|
unsigned long starttimes[2]; /* nonzero if running */
|
|
};
|
|
|
|
typedef struct util_timingdata util_timingdata_t;
|
|
|
|
#endif /* _MINIX_SYSUTIL_H */
|
|
|