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-rw-r--r--arch/cris/Kconfig3
-rw-r--r--arch/cris/arch-v10/drivers/eeprom.c48
-rw-r--r--arch/cris/arch-v10/kernel/time.c37
-rw-r--r--arch/cris/arch-v32/kernel/time.c40
-rw-r--r--arch/cris/include/asm/atomic.h2
-rw-r--r--arch/cris/include/asm/thread_info.h2
-rw-r--r--arch/cris/kernel/time.c20
7 files changed, 35 insertions, 117 deletions
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 059eac6abda..e25bf4440b5 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -23,6 +23,9 @@ config RWSEM_XCHGADD_ALGORITHM
config GENERIC_TIME
def_bool y
+config GENERIC_CMOS_UPDATE
+ def_bool y
+
config ARCH_USES_GETTIMEOFFSET
def_bool y
diff --git a/arch/cris/arch-v10/drivers/eeprom.c b/arch/cris/arch-v10/drivers/eeprom.c
index 1f2ae909d3e..c3405507a3d 100644
--- a/arch/cris/arch-v10/drivers/eeprom.c
+++ b/arch/cris/arch-v10/drivers/eeprom.c
@@ -73,8 +73,7 @@ struct eeprom_type
int adapt_state; /* 1 = To high , 0 = Even, -1 = To low */
/* this one is to keep the read/write operations atomic */
- wait_queue_head_t wait_q;
- volatile int busy;
+ struct mutex lock;
int retry_cnt_addr; /* Used to keep track of number of retries for
adaptive timing adjustments */
int retry_cnt_read;
@@ -115,8 +114,7 @@ const struct file_operations eeprom_fops =
int __init eeprom_init(void)
{
- init_waitqueue_head(&eeprom.wait_q);
- eeprom.busy = 0;
+ mutex_init(&eeprom.lock);
#ifdef CONFIG_ETRAX_I2C_EEPROM_PROBE
#define EETEXT "Found"
@@ -439,10 +437,7 @@ static loff_t eeprom_lseek(struct file * file, loff_t offset, int orig)
static int eeprom_read_buf(loff_t addr, char * buf, int count)
{
- struct file f;
-
- f.f_pos = addr;
- return eeprom_read(&f, buf, count, &addr);
+ return eeprom_read(NULL, buf, count, &addr);
}
@@ -452,7 +447,7 @@ static int eeprom_read_buf(loff_t addr, char * buf, int count)
static ssize_t eeprom_read(struct file * file, char * buf, size_t count, loff_t *off)
{
int read=0;
- unsigned long p = file->f_pos;
+ unsigned long p = *off;
unsigned char page;
@@ -461,12 +456,9 @@ static ssize_t eeprom_read(struct file * file, char * buf, size_t count, loff_t
return -EFAULT;
}
- wait_event_interruptible(eeprom.wait_q, !eeprom.busy);
- if (signal_pending(current))
+ if (mutex_lock_interruptible(&eeprom.lock))
return -EINTR;
- eeprom.busy++;
-
page = (unsigned char) (p >> 8);
if(!eeprom_address(p))
@@ -476,8 +468,7 @@ static ssize_t eeprom_read(struct file * file, char * buf, size_t count, loff_t
i2c_stop();
/* don't forget to wake them up */
- eeprom.busy--;
- wake_up_interruptible(&eeprom.wait_q);
+ mutex_unlock(&eeprom.lock);
return -EFAULT;
}
@@ -501,11 +492,10 @@ static ssize_t eeprom_read(struct file * file, char * buf, size_t count, loff_t
if(read > 0)
{
- file->f_pos += read;
+ *off += read;
}
- eeprom.busy--;
- wake_up_interruptible(&eeprom.wait_q);
+ mutex_unlock(&eeprom.lock);
return read;
}
@@ -513,11 +503,7 @@ static ssize_t eeprom_read(struct file * file, char * buf, size_t count, loff_t
static int eeprom_write_buf(loff_t addr, const char * buf, int count)
{
- struct file f;
-
- f.f_pos = addr;
-
- return eeprom_write(&f, buf, count, &addr);
+ return eeprom_write(NULL, buf, count, &addr);
}
@@ -534,16 +520,14 @@ static ssize_t eeprom_write(struct file * file, const char * buf, size_t count,
return -EFAULT;
}
- wait_event_interruptible(eeprom.wait_q, !eeprom.busy);
/* bail out if we get interrupted */
- if (signal_pending(current))
+ if (mutex_lock_interruptible(&eeprom.lock))
return -EINTR;
- eeprom.busy++;
for(i = 0; (i < EEPROM_RETRIES) && (restart > 0); i++)
{
restart = 0;
written = 0;
- p = file->f_pos;
+ p = *off;
while( (written < count) && (p < eeprom.size))
@@ -556,8 +540,7 @@ static ssize_t eeprom_write(struct file * file, const char * buf, size_t count,
i2c_stop();
/* don't forget to wake them up */
- eeprom.busy--;
- wake_up_interruptible(&eeprom.wait_q);
+ mutex_unlock(&eeprom.lock);
return -EFAULT;
}
#ifdef EEPROM_ADAPTIVE_TIMING
@@ -669,12 +652,11 @@ static ssize_t eeprom_write(struct file * file, const char * buf, size_t count,
} /* while */
} /* for */
- eeprom.busy--;
- wake_up_interruptible(&eeprom.wait_q);
- if (written == 0 && file->f_pos >= eeprom.size){
+ mutex_unlock(&eeprom.lock);
+ if (written == 0 && p >= eeprom.size){
return -ENOSPC;
}
- file->f_pos += written;
+ *off = p;
return written;
}
diff --git a/arch/cris/arch-v10/kernel/time.c b/arch/cris/arch-v10/kernel/time.c
index 31ca1418d5a..30adae594ae 100644
--- a/arch/cris/arch-v10/kernel/time.c
+++ b/arch/cris/arch-v10/kernel/time.c
@@ -26,7 +26,6 @@
/* it will make jiffies at 96 hz instead of 100 hz though */
#undef USE_CASCADE_TIMERS
-extern void update_xtime_from_cmos(void);
extern int set_rtc_mmss(unsigned long nowtime);
extern int have_rtc;
@@ -188,8 +187,6 @@ stop_watchdog(void)
#endif
}
-/* last time the cmos clock got updated */
-static long last_rtc_update = 0;
/*
* timer_interrupt() needs to keep up the real-time clock,
@@ -232,24 +229,6 @@ timer_interrupt(int irq, void *dev_id)
do_timer(1);
cris_do_profile(regs); /* Save profiling information */
-
- /*
- * If we have an externally synchronized Linux clock, then update
- * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
- * called as close as possible to 500 ms before the new second starts.
- *
- * The division here is not time critical since it will run once in
- * 11 minutes
- */
- if (ntp_synced() &&
- xtime.tv_sec > last_rtc_update + 660 &&
- (xtime.tv_nsec / 1000) >= 500000 - (tick_nsec / 1000) / 2 &&
- (xtime.tv_nsec / 1000) <= 500000 + (tick_nsec / 1000) / 2) {
- if (set_rtc_mmss(xtime.tv_sec) == 0)
- last_rtc_update = xtime.tv_sec;
- else
- last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
- }
return IRQ_HANDLED;
}
@@ -274,22 +253,10 @@ time_init(void)
*/
loops_per_usec = 50;
- if(RTC_INIT() < 0) {
- /* no RTC, start at 1980 */
- xtime.tv_sec = 0;
- xtime.tv_nsec = 0;
+ if(RTC_INIT() < 0)
have_rtc = 0;
- } else {
- /* get the current time */
+ else
have_rtc = 1;
- update_xtime_from_cmos();
- }
-
- /*
- * Initialize wall_to_monotonic such that adding it to xtime will yield zero, the
- * tv_nsec field must be normalized (i.e., 0 <= nsec < NSEC_PER_SEC).
- */
- set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, -xtime.tv_nsec);
/* Setup the etrax timers
* Base frequency is 25000 hz, divider 250 -> 100 HZ
diff --git a/arch/cris/arch-v32/kernel/time.c b/arch/cris/arch-v32/kernel/time.c
index b1920d8de40..1ee0e101022 100644
--- a/arch/cris/arch-v32/kernel/time.c
+++ b/arch/cris/arch-v32/kernel/time.c
@@ -44,7 +44,6 @@ unsigned long timer_regs[NR_CPUS] =
#endif
};
-extern void update_xtime_from_cmos(void);
extern int set_rtc_mmss(unsigned long nowtime);
extern int have_rtc;
@@ -198,9 +197,6 @@ handle_watchdog_bite(struct pt_regs* regs)
#endif
}
-/* Last time the cmos clock got updated. */
-static long last_rtc_update = 0;
-
/*
* timer_interrupt() needs to keep up the real-time clock,
* as well as call the "do_timer()" routine every clocktick.
@@ -238,25 +234,6 @@ timer_interrupt(int irq, void *dev_id)
/* Call the real timer interrupt handler */
do_timer(1);
-
- /*
- * If we have an externally synchronized Linux clock, then update
- * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
- * called as close as possible to 500 ms before the new second starts.
- *
- * The division here is not time critical since it will run once in
- * 11 minutes
- */
- if ((time_status & STA_UNSYNC) == 0 &&
- xtime.tv_sec > last_rtc_update + 660 &&
- (xtime.tv_nsec / 1000) >= 500000 - (tick_nsec / 1000) / 2 &&
- (xtime.tv_nsec / 1000) <= 500000 + (tick_nsec / 1000) / 2) {
- if (set_rtc_mmss(xtime.tv_sec) == 0)
- last_rtc_update = xtime.tv_sec;
- else
- /* Do it again in 60 s */
- last_rtc_update = xtime.tv_sec - 600;
- }
return IRQ_HANDLED;
}
@@ -309,23 +286,10 @@ time_init(void)
*/
loops_per_usec = 50;
- if(RTC_INIT() < 0) {
- /* No RTC, start at 1980 */
- xtime.tv_sec = 0;
- xtime.tv_nsec = 0;
+ if(RTC_INIT() < 0)
have_rtc = 0;
- } else {
- /* Get the current time */
+ else
have_rtc = 1;
- update_xtime_from_cmos();
- }
-
- /*
- * Initialize wall_to_monotonic such that adding it to
- * xtime will yield zero, the tv_nsec field must be normalized
- * (i.e., 0 <= nsec < NSEC_PER_SEC).
- */
- set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, -xtime.tv_nsec);
/* Start CPU local timer. */
cris_timer_init();
diff --git a/arch/cris/include/asm/atomic.h b/arch/cris/include/asm/atomic.h
index a6aca819e9f..88dc9b9c4ba 100644
--- a/arch/cris/include/asm/atomic.h
+++ b/arch/cris/include/asm/atomic.h
@@ -15,7 +15,7 @@
#define ATOMIC_INIT(i) { (i) }
-#define atomic_read(v) ((v)->counter)
+#define atomic_read(v) (*(volatile int *)&(v)->counter)
#define atomic_set(v,i) (((v)->counter) = (i))
/* These should be written in asm but we do it in C for now. */
diff --git a/arch/cris/include/asm/thread_info.h b/arch/cris/include/asm/thread_info.h
index c3aade36c33..91776069ca8 100644
--- a/arch/cris/include/asm/thread_info.h
+++ b/arch/cris/include/asm/thread_info.h
@@ -85,7 +85,7 @@ struct thread_info {
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
-#define TIF_MEMDIE 17
+#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
#define TIF_FREEZE 18 /* is freezing for suspend */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
diff --git a/arch/cris/kernel/time.c b/arch/cris/kernel/time.c
index a05dd31f3ef..c72730d20ef 100644
--- a/arch/cris/kernel/time.c
+++ b/arch/cris/kernel/time.c
@@ -98,6 +98,8 @@ unsigned long
get_cmos_time(void)
{
unsigned int year, mon, day, hour, min, sec;
+ if(!have_rtc)
+ return 0;
sec = CMOS_READ(RTC_SECONDS);
min = CMOS_READ(RTC_MINUTES);
@@ -119,19 +121,19 @@ get_cmos_time(void)
return mktime(year, mon, day, hour, min, sec);
}
-/* update xtime from the CMOS settings. used when /dev/rtc gets a SET_TIME.
- * TODO: this doesn't reset the fancy NTP phase stuff as do_settimeofday does.
- */
-void
-update_xtime_from_cmos(void)
+int update_persistent_clock(struct timespec now)
{
- if(have_rtc) {
- xtime.tv_sec = get_cmos_time();
- xtime.tv_nsec = 0;
- }
+ return set_rtc_mmss(now.tv_sec);
}
+void read_persistent_clock(struct timespec *ts)
+{
+ ts->tv_sec = get_cmos_time();
+ ts->tv_nsec = 0;
+}
+
+
extern void cris_profile_sample(struct pt_regs* regs);
void
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 05:46:02 +0000