#include <linux/cpufreq.h>
#include <linux/percpu.h>
#include <linux/profile.h>
-#include <linux/miscdevice.h>
-#include <linux/rtc.h>
#include <asm/oplib.h>
#include <asm/mostek.h>
#include <asm/smp.h>
#include <asm/sections.h>
#include <asm/cpudata.h>
-#include <asm/uaccess.h>
DEFINE_SPINLOCK(mostek_lock);
DEFINE_SPINLOCK(rtc_lock);
static void stick_init_tick(unsigned long offset)
{
- /* Writes to the %tick and %stick register are not
- * allowed on sun4v. The Hypervisor controls that
- * bit, per-strand.
- */
- if (tlb_type != hypervisor) {
- tick_disable_protection();
-
- /* Let the user get at STICK too. */
- __asm__ __volatile__(
- " rd %%asr24, %%g2\n"
- " andn %%g2, %0, %%g2\n"
- " wr %%g2, 0, %%asr24"
- : /* no outputs */
- : "r" (TICK_PRIV_BIT)
- : "g1", "g2");
- }
+ tick_disable_protection();
+
+ /* Let the user get at STICK too. */
+ __asm__ __volatile__(
+ " rd %%asr24, %%g2\n"
+ " andn %%g2, %0, %%g2\n"
+ " wr %%g2, 0, %%asr24"
+ : /* no outputs */
+ : "r" (TICK_PRIV_BIT)
+ : "g1", "g2");
__asm__ __volatile__(
" rd %%asr24, %%g1\n"
mon = MSTK_REG_MONTH(mregs);
year = MSTK_CVT_YEAR( MSTK_REG_YEAR(mregs) );
} else {
+ int i;
+
/* Dallas 12887 RTC chip. */
+ /* Stolen from arch/i386/kernel/time.c, see there for
+ * credits and descriptive comments.
+ */
+ for (i = 0; i < 1000000; i++) {
+ if (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP)
+ break;
+ udelay(10);
+ }
+ for (i = 0; i < 1000000; i++) {
+ if (!(CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP))
+ break;
+ udelay(10);
+ }
do {
sec = CMOS_READ(RTC_SECONDS);
min = CMOS_READ(RTC_MINUTES);
mon = CMOS_READ(RTC_MONTH);
year = CMOS_READ(RTC_YEAR);
} while (sec != CMOS_READ(RTC_SECONDS));
-
if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
BCD_TO_BIN(sec);
BCD_TO_BIN(min);
}
}
-/* davem suggests we keep this within the 4M locked kernel image */
-static u32 starfire_get_time(void)
-{
- static char obp_gettod[32];
- static u32 unix_tod;
-
- sprintf(obp_gettod, "h# %08x unix-gettod",
- (unsigned int) (long) &unix_tod);
- prom_feval(obp_gettod);
-
- return unix_tod;
-}
-
-static int starfire_set_time(u32 val)
-{
- /* Do nothing, time is set using the service processor
- * console on this platform.
- */
- return 0;
-}
-
-static u32 hypervisor_get_time(void)
-{
- register unsigned long func asm("%o5");
- register unsigned long arg0 asm("%o0");
- register unsigned long arg1 asm("%o1");
- int retries = 10000;
-
-retry:
- func = HV_FAST_TOD_GET;
- arg0 = 0;
- arg1 = 0;
- __asm__ __volatile__("ta %6"
- : "=&r" (func), "=&r" (arg0), "=&r" (arg1)
- : "0" (func), "1" (arg0), "2" (arg1),
- "i" (HV_FAST_TRAP));
- if (arg0 == HV_EOK)
- return arg1;
- if (arg0 == HV_EWOULDBLOCK) {
- if (--retries > 0) {
- udelay(100);
- goto retry;
- }
- printk(KERN_WARNING "SUN4V: tod_get() timed out.\n");
- return 0;
- }
- printk(KERN_WARNING "SUN4V: tod_get() not supported.\n");
- return 0;
-}
-
-static int hypervisor_set_time(u32 secs)
-{
- register unsigned long func asm("%o5");
- register unsigned long arg0 asm("%o0");
- int retries = 10000;
-
-retry:
- func = HV_FAST_TOD_SET;
- arg0 = secs;
- __asm__ __volatile__("ta %4"
- : "=&r" (func), "=&r" (arg0)
- : "0" (func), "1" (arg0),
- "i" (HV_FAST_TRAP));
- if (arg0 == HV_EOK)
- return 0;
- if (arg0 == HV_EWOULDBLOCK) {
- if (--retries > 0) {
- udelay(100);
- goto retry;
- }
- printk(KERN_WARNING "SUN4V: tod_set() timed out.\n");
- return -EAGAIN;
- }
- printk(KERN_WARNING "SUN4V: tod_set() not supported.\n");
- return -EOPNOTSUPP;
-}
-
void __init clock_probe(void)
{
struct linux_prom_registers clk_reg[2];
if (this_is_starfire) {
- xtime.tv_sec = starfire_get_time();
- xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
- set_normalized_timespec(&wall_to_monotonic,
- -xtime.tv_sec, -xtime.tv_nsec);
- return;
- }
- if (tlb_type == hypervisor) {
- xtime.tv_sec = hypervisor_get_time();
+ /* davem suggests we keep this within the 4M locked kernel image */
+ static char obp_gettod[256];
+ static u32 unix_tod;
+
+ sprintf(obp_gettod, "h# %08x unix-gettod",
+ (unsigned int) (long) &unix_tod);
+ prom_feval(obp_gettod);
+ xtime.tv_sec = unix_tod;
xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
}
struct freq_table {
+ unsigned long udelay_val_ref;
unsigned long clock_tick_ref;
unsigned int ref_freq;
};
-static DEFINE_PER_CPU(struct freq_table, sparc64_freq_table) = { 0, 0 };
+static DEFINE_PER_CPU(struct freq_table, sparc64_freq_table) = { 0, 0, 0 };
unsigned long sparc64_get_clock_tick(unsigned int cpu)
{
if (!ft->ref_freq) {
ft->ref_freq = freq->old;
+ ft->udelay_val_ref = cpu_data(cpu).udelay_val;
ft->clock_tick_ref = cpu_data(cpu).clock_tick;
}
if ((val == CPUFREQ_PRECHANGE && freq->old < freq->new) ||
(val == CPUFREQ_POSTCHANGE && freq->old > freq->new) ||
(val == CPUFREQ_RESUMECHANGE)) {
+ cpu_data(cpu).udelay_val =
+ cpufreq_scale(ft->udelay_val_ref,
+ ft->ref_freq,
+ freq->new);
cpu_data(cpu).clock_tick =
cpufreq_scale(ft->clock_tick_ref,
ft->ref_freq,
};
/* The quotient formula is taken from the IA64 port. */
-#define SPARC64_NSEC_PER_CYC_SHIFT 30UL
+#define SPARC64_NSEC_PER_CYC_SHIFT 10UL
void __init time_init(void)
{
unsigned long clock = sparc64_init_timers();
return retval;
}
}
-
-#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */
-static unsigned char mini_rtc_status; /* bitmapped status byte. */
-
-/* months start at 0 now */
-static unsigned char days_in_mo[] =
-{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
-
-#define FEBRUARY 2
-#define STARTOFTIME 1970
-#define SECDAY 86400L
-#define SECYR (SECDAY * 365)
-#define leapyear(year) ((year) % 4 == 0 && \
- ((year) % 100 != 0 || (year) % 400 == 0))
-#define days_in_year(a) (leapyear(a) ? 366 : 365)
-#define days_in_month(a) (month_days[(a) - 1])
-
-static int month_days[12] = {
- 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
-};
-
-/*
- * This only works for the Gregorian calendar - i.e. after 1752 (in the UK)
- */
-static void GregorianDay(struct rtc_time * tm)
-{
- int leapsToDate;
- int lastYear;
- int day;
- int MonthOffset[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
-
- lastYear = tm->tm_year - 1;
-
- /*
- * Number of leap corrections to apply up to end of last year
- */
- leapsToDate = lastYear / 4 - lastYear / 100 + lastYear / 400;
-
- /*
- * This year is a leap year if it is divisible by 4 except when it is
- * divisible by 100 unless it is divisible by 400
- *
- * e.g. 1904 was a leap year, 1900 was not, 1996 is, and 2000 was
- */
- day = tm->tm_mon > 2 && leapyear(tm->tm_year);
-
- day += lastYear*365 + leapsToDate + MonthOffset[tm->tm_mon-1] +
- tm->tm_mday;
-
- tm->tm_wday = day % 7;
-}
-
-static void to_tm(int tim, struct rtc_time *tm)
-{
- register int i;
- register long hms, day;
-
- day = tim / SECDAY;
- hms = tim % SECDAY;
-
- /* Hours, minutes, seconds are easy */
- tm->tm_hour = hms / 3600;
- tm->tm_min = (hms % 3600) / 60;
- tm->tm_sec = (hms % 3600) % 60;
-
- /* Number of years in days */
- for (i = STARTOFTIME; day >= days_in_year(i); i++)
- day -= days_in_year(i);
- tm->tm_year = i;
-
- /* Number of months in days left */
- if (leapyear(tm->tm_year))
- days_in_month(FEBRUARY) = 29;
- for (i = 1; day >= days_in_month(i); i++)
- day -= days_in_month(i);
- days_in_month(FEBRUARY) = 28;
- tm->tm_mon = i;
-
- /* Days are what is left over (+1) from all that. */
- tm->tm_mday = day + 1;
-
- /*
- * Determine the day of week
- */
- GregorianDay(tm);
-}
-
-/* Both Starfire and SUN4V give us seconds since Jan 1st, 1970,
- * aka Unix time. So we have to convert to/from rtc_time.
- */
-static inline void mini_get_rtc_time(struct rtc_time *time)
-{
- unsigned long flags;
- u32 seconds;
-
- spin_lock_irqsave(&rtc_lock, flags);
- seconds = 0;
- if (this_is_starfire)
- seconds = starfire_get_time();
- else if (tlb_type == hypervisor)
- seconds = hypervisor_get_time();
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- to_tm(seconds, time);
- time->tm_year -= 1900;
- time->tm_mon -= 1;
-}
-
-static inline int mini_set_rtc_time(struct rtc_time *time)
-{
- u32 seconds = mktime(time->tm_year + 1900, time->tm_mon + 1,
- time->tm_mday, time->tm_hour,
- time->tm_min, time->tm_sec);
- unsigned long flags;
- int err;
-
- spin_lock_irqsave(&rtc_lock, flags);
- err = -ENODEV;
- if (this_is_starfire)
- err = starfire_set_time(seconds);
- else if (tlb_type == hypervisor)
- err = hypervisor_set_time(seconds);
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- return err;
-}
-
-static int mini_rtc_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct rtc_time wtime;
- void __user *argp = (void __user *)arg;
-
- switch (cmd) {
-
- case RTC_PLL_GET:
- return -EINVAL;
-
- case RTC_PLL_SET:
- return -EINVAL;
-
- case RTC_UIE_OFF: /* disable ints from RTC updates. */
- return 0;
-
- case RTC_UIE_ON: /* enable ints for RTC updates. */
- return -EINVAL;
-
- case RTC_RD_TIME: /* Read the time/date from RTC */
- /* this doesn't get week-day, who cares */
- memset(&wtime, 0, sizeof(wtime));
- mini_get_rtc_time(&wtime);
-
- return copy_to_user(argp, &wtime, sizeof(wtime)) ? -EFAULT : 0;
-
- case RTC_SET_TIME: /* Set the RTC */
- {
- int year;
- unsigned char leap_yr;
-
- if (!capable(CAP_SYS_TIME))
- return -EACCES;
-
- if (copy_from_user(&wtime, argp, sizeof(wtime)))
- return -EFAULT;
-
- year = wtime.tm_year + 1900;
- leap_yr = ((!(year % 4) && (year % 100)) ||
- !(year % 400));
-
- if ((wtime.tm_mon < 0 || wtime.tm_mon > 11) || (wtime.tm_mday < 1))
- return -EINVAL;
-
- if (wtime.tm_mday < 0 || wtime.tm_mday >
- (days_in_mo[wtime.tm_mon] + ((wtime.tm_mon == 1) && leap_yr)))
- return -EINVAL;
-
- if (wtime.tm_hour < 0 || wtime.tm_hour >= 24 ||
- wtime.tm_min < 0 || wtime.tm_min >= 60 ||
- wtime.tm_sec < 0 || wtime.tm_sec >= 60)
- return -EINVAL;
-
- return mini_set_rtc_time(&wtime);
- }
- }
-
- return -EINVAL;
-}
-
-static int mini_rtc_open(struct inode *inode, struct file *file)
-{
- if (mini_rtc_status & RTC_IS_OPEN)
- return -EBUSY;
-
- mini_rtc_status |= RTC_IS_OPEN;
-
- return 0;
-}
-
-static int mini_rtc_release(struct inode *inode, struct file *file)
-{
- mini_rtc_status &= ~RTC_IS_OPEN;
- return 0;
-}
-
-
-static struct file_operations mini_rtc_fops = {
- .owner = THIS_MODULE,
- .ioctl = mini_rtc_ioctl,
- .open = mini_rtc_open,
- .release = mini_rtc_release,
-};
-
-static struct miscdevice rtc_mini_dev =
-{
- .minor = RTC_MINOR,
- .name = "rtc",
- .fops = &mini_rtc_fops,
-};
-
-static int __init rtc_mini_init(void)
-{
- int retval;
-
- if (tlb_type != hypervisor && !this_is_starfire)
- return -ENODEV;
-
- printk(KERN_INFO "Mini RTC Driver\n");
-
- retval = misc_register(&rtc_mini_dev);
- if (retval < 0)
- return retval;
-
- return 0;
-}
-
-static void __exit rtc_mini_exit(void)
-{
- misc_deregister(&rtc_mini_dev);
-}
-
-
-module_init(rtc_mini_init);
-module_exit(rtc_mini_exit);
git://git.onelab.eu / linux-2.6.git / blobdiff