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Diffstat (limited to 'arch/blackfin/kernel/time.c')
-rw-r--r--arch/blackfin/kernel/time.c64
1 files changed, 3 insertions, 61 deletions
diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c
index adb54aa7d7c8..bd3b53da295e 100644
--- a/arch/blackfin/kernel/time.c
+++ b/arch/blackfin/kernel/time.c
@@ -14,6 +14,7 @@
14#include <linux/time.h> 14#include <linux/time.h>
15#include <linux/irq.h> 15#include <linux/irq.h>
16#include <linux/delay.h> 16#include <linux/delay.h>
17#include <linux/sched.h>
17 18
18#include <asm/blackfin.h> 19#include <asm/blackfin.h>
19#include <asm/time.h> 20#include <asm/time.h>
@@ -81,11 +82,11 @@ time_sched_init(irqreturn_t(*timer_routine) (int, void *))
81#endif 82#endif
82} 83}
83 84
85#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
84/* 86/*
85 * Should return useconds since last timer tick 87 * Should return useconds since last timer tick
86 */ 88 */
87#ifndef CONFIG_GENERIC_TIME 89u32 arch_gettimeoffset(void)
88static unsigned long gettimeoffset(void)
89{ 90{
90 unsigned long offset; 91 unsigned long offset;
91 unsigned long clocks_per_jiffy; 92 unsigned long clocks_per_jiffy;
@@ -184,65 +185,6 @@ void __init time_init(void)
184 time_sched_init(timer_interrupt); 185 time_sched_init(timer_interrupt);
185} 186}
186 187
187#ifndef CONFIG_GENERIC_TIME
188void do_gettimeofday(struct timeval *tv)
189{
190 unsigned long flags;
191 unsigned long seq;
192 unsigned long usec, sec;
193
194 do {
195 seq = read_seqbegin_irqsave(&xtime_lock, flags);
196 usec = gettimeoffset();
197 sec = xtime.tv_sec;
198 usec += (xtime.tv_nsec / NSEC_PER_USEC);
199 }
200 while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
201
202 while (usec >= USEC_PER_SEC) {
203 usec -= USEC_PER_SEC;
204 sec++;
205 }
206
207 tv->tv_sec = sec;
208 tv->tv_usec = usec;
209}
210EXPORT_SYMBOL(do_gettimeofday);
211
212int do_settimeofday(struct timespec *tv)
213{
214 time_t wtm_sec, sec = tv->tv_sec;
215 long wtm_nsec, nsec = tv->tv_nsec;
216
217 if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
218 return -EINVAL;
219
220 write_seqlock_irq(&xtime_lock);
221 /*
222 * This is revolting. We need to set the xtime.tv_usec
223 * correctly. However, the value in this location is
224 * is value at the last tick.
225 * Discover what correction gettimeofday
226 * would have done, and then undo it!
227 */
228 nsec -= (gettimeoffset() * NSEC_PER_USEC);
229
230 wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
231 wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
232
233 set_normalized_timespec(&xtime, sec, nsec);
234 set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
235
236 ntp_clear();
237
238 write_sequnlock_irq(&xtime_lock);
239 clock_was_set();
240
241 return 0;
242}
243EXPORT_SYMBOL(do_settimeofday);
244#endif /* !CONFIG_GENERIC_TIME */
245
246/* 188/*
247 * Scheduler clock - returns current time in nanosec units. 189 * Scheduler clock - returns current time in nanosec units.
248 */ 190 */