powerpc: Remove arch/ppc and include/asm-ppc

All the maintained platforms are now in arch/powerpc, so the old
arch/ppc stuff can now go away.

Acked-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Becky Bruce <becky.bruce@freescale.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Jochen Friedrich <jochen@scram.de>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: Jon Loeliger <jdl@freescale.com>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Scott Wood <scottwood@freescale.com>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 445 deletions

diff --git a/arch/ppc/kernel/time.c b/arch/ppc/kernel/time.c
deleted file mode 100644
index 18ee851e33e3..000000000000
--- a/arch/ppc/kernel/time.c
+++ /dev/null
@@ -1,445 +0,0 @@
-/*
- * Common time routines among all ppc machines.
- *
- * Written by Cort Dougan (cort@cs.nmt.edu) to merge
- * Paul Mackerras' version and mine for PReP and Pmac.
- * MPC8xx/MBX changes by Dan Malek (dmalek@jlc.net).
- *
- * First round of bugfixes by Gabriel Paubert (paubert@iram.es)
- * to make clock more stable (2.4.0-test5). The only thing
- * that this code assumes is that the timebases have been synchronized
- * by firmware on SMP and are never stopped (never do sleep
- * on SMP then, nap and doze are OK).
- *
- * TODO (not necessarily in this file):
- * - improve precision and reproducibility of timebase frequency
- * measurement at boot time.
- * - get rid of xtime_lock for gettimeofday (generic kernel problem
- * to be implemented on all architectures for SMP scalability and
- * eventually implementing gettimeofday without entering the kernel).
- * - put all time/clock related variables in a single structure
- * to minimize number of cache lines touched by gettimeofday()
- * - for astronomical applications: add a new function to get
- * non ambiguous timestamps even around leap seconds. This needs
- * a new timestamp format and a good name.
- *
- *
- * The following comment is partially obsolete (at least the long wait
- * is no more a valid reason):
- * Since the MPC8xx has a programmable interrupt timer, I decided to
- * use that rather than the decrementer.  Two reasons: 1.) the clock
- * frequency is low, causing 2.) a long wait in the timer interrupt
- *		while ((d = get_dec()) == dval)
- * loop.  The MPC8xx can be driven from a variety of input clocks,
- * so a number of assumptions have been made here because the kernel
- * parameter HZ is a constant.  We assume (correctly, today :-) that
- * the MPC8xx on the MBX board is driven from a 32.768 kHz crystal.
- * This is then divided by 4, providing a 8192 Hz clock into the PIT.
- * Since it is not possible to get a nice 100 Hz clock out of this, without
- * creating a software PLL, I have set HZ to 128.  -- Dan
- *
- * 1997-09-10  Updated NTP code according to technical memorandum Jan '96
- *             "A Kernel Model for Precision Timekeeping" by Dave Mills
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/param.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/timex.h>
-#include <linux/kernel_stat.h>
-#include <linux/mc146818rtc.h>
-#include <linux/time.h>
-#include <linux/init.h>
-#include <linux/profile.h>
-
-#include <asm/io.h>
-#include <asm/nvram.h>
-#include <asm/cache.h>
-#include <asm/8xx_immap.h>
-#include <asm/machdep.h>
-#include <asm/irq_regs.h>
-
-#include <asm/time.h>
-
-unsigned long disarm_decr[NR_CPUS];
-
-extern struct timezone sys_tz;
-
-/* keep track of when we need to update the rtc */
-time_t last_rtc_update;
-
-/* The decrementer counts down by 128 every 128ns on a 601. */
-#define DECREMENTER_COUNT_601	(1000000000 / HZ)
-
-unsigned tb_ticks_per_jiffy;
-unsigned tb_to_us;
-unsigned tb_last_stamp;
-unsigned long tb_to_ns_scale;
-
-/* used for timezone offset */
-static long timezone_offset;
-
-DEFINE_SPINLOCK(rtc_lock);
-
-EXPORT_SYMBOL(rtc_lock);
-
-/* Timer interrupt helper function */
-static inline int tb_delta(unsigned *jiffy_stamp) {
-	int delta;
-	if (__USE_RTC()) {
-		delta = get_rtcl();
-		if (delta < *jiffy_stamp) *jiffy_stamp -= 1000000000;
-		delta -= *jiffy_stamp;
-	} else {
-		delta = get_tbl() - *jiffy_stamp;
-	}
-	return delta;
-}
-
-#ifdef CONFIG_SMP
-unsigned long profile_pc(struct pt_regs *regs)
-{
-	unsigned long pc = instruction_pointer(regs);
-
-	if (in_lock_functions(pc))
-		return regs->link;
-
-	return pc;
-}
-EXPORT_SYMBOL(profile_pc);
-#endif
-
-void wakeup_decrementer(void)
-{
-	set_dec(tb_ticks_per_jiffy);
-	/* No currently-supported powerbook has a 601,
-	 * so use get_tbl, not native
-	 */
-	last_jiffy_stamp(0) = tb_last_stamp = get_tbl();
-}
-
-/*
- * timer_interrupt - gets called when the decrementer overflows,
- * with interrupts disabled.
- * We set it up to overflow again in 1/HZ seconds.
- */
-void timer_interrupt(struct pt_regs * regs)
-{
-	struct pt_regs *old_regs;
-	int next_dec;
-	unsigned long cpu = smp_processor_id();
-	unsigned jiffy_stamp = last_jiffy_stamp(cpu);
-	extern void do_IRQ(struct pt_regs *);
-
-	if (atomic_read(&ppc_n_lost_interrupts) != 0)
-		do_IRQ(regs);
-
-	old_regs = set_irq_regs(regs);
-	irq_enter();
-
-	while ((next_dec = tb_ticks_per_jiffy - tb_delta(&jiffy_stamp)) <= 0) {
-		jiffy_stamp += tb_ticks_per_jiffy;
-		
-		profile_tick(CPU_PROFILING);
-		update_process_times(user_mode(regs));
-
-	  	if (smp_processor_id())
-			continue;
-
-		/* We are in an interrupt, no need to save/restore flags */
-		write_seqlock(&xtime_lock);
-		tb_last_stamp = jiffy_stamp;
-		do_timer(1);
-
-		/*
-		 * update the rtc when needed, this should be performed on the
-		 * right fraction of a second. Half or full second ?
-		 * Full second works on mk48t59 clocks, others need testing.
-		 * Note that this update is basically only used through
-		 * the adjtimex system calls. Setting the HW clock in
-		 * any other way is a /dev/rtc and userland business.
-		 * This is still wrong by -0.5/+1.5 jiffies because of the
-		 * timer interrupt resolution and possible delay, but here we
-		 * hit a quantization limit which can only be solved by higher
-		 * resolution timers and decoupling time management from timer
-		 * interrupts. This is also wrong on the clocks
-		 * which require being written at the half second boundary.
-		 * We should have an rtc call that only sets the minutes and
-		 * seconds like on Intel to avoid problems with non UTC clocks.
-		 */
-		if ( ppc_md.set_rtc_time && ntp_synced() &&
-		     xtime.tv_sec - last_rtc_update >= 659 &&
-		     abs((xtime.tv_nsec / 1000) - (1000000-1000000/HZ)) < 500000/HZ) {
-		  	if (ppc_md.set_rtc_time(xtime.tv_sec+1 + timezone_offset) == 0)
-				last_rtc_update = xtime.tv_sec+1;
-			else
-				/* Try again one minute later */
-				last_rtc_update += 60;
-		}
-		write_sequnlock(&xtime_lock);
-	}
-	if ( !disarm_decr[smp_processor_id()] )
-		set_dec(next_dec);
-	last_jiffy_stamp(cpu) = jiffy_stamp;
-
-	if (ppc_md.heartbeat && !ppc_md.heartbeat_count--)
-		ppc_md.heartbeat();
-
-	irq_exit();
-	set_irq_regs(old_regs);
-}
-
-/*
- * This version of gettimeofday has microsecond resolution.
- */
-void do_gettimeofday(struct timeval *tv)
-{
-	unsigned long flags;
-	unsigned long seq;
-	unsigned delta, usec, sec;
-
-	do {
-		seq = read_seqbegin_irqsave(&xtime_lock, flags);
-		sec = xtime.tv_sec;
-		usec = (xtime.tv_nsec / 1000);
-		delta = tb_ticks_since(tb_last_stamp);
-#ifdef CONFIG_SMP
-		/* As long as timebases are not in sync, gettimeofday can only
-		 * have jiffy resolution on SMP.
-		 */
-		if (!smp_tb_synchronized)
-			delta = 0;
-#endif /* CONFIG_SMP */
-	} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
-
-	usec += mulhwu(tb_to_us, delta);
-	while (usec >= 1000000) {
-	  	sec++;
-		usec -= 1000000;
-	}
-	tv->tv_sec = sec;
-	tv->tv_usec = usec;
-}
-
-EXPORT_SYMBOL(do_gettimeofday);
-
-int do_settimeofday(struct timespec *tv)
-{
-	time_t wtm_sec, new_sec = tv->tv_sec;
-	long wtm_nsec, new_nsec = tv->tv_nsec;
-	unsigned long flags;
-	int tb_delta;
-
-	if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
-		return -EINVAL;
-
-	write_seqlock_irqsave(&xtime_lock, flags);
-	/* Updating the RTC is not the job of this code. If the time is
-	 * stepped under NTP, the RTC will be update after STA_UNSYNC
-	 * is cleared. Tool like clock/hwclock either copy the RTC
-	 * to the system time, in which case there is no point in writing
-	 * to the RTC again, or write to the RTC but then they don't call
-	 * settimeofday to perform this operation. Note also that
-	 * we don't touch the decrementer since:
-	 * a) it would lose timer interrupt synchronization on SMP
-	 * (if it is working one day)
-	 * b) it could make one jiffy spuriously shorter or longer
-	 * which would introduce another source of uncertainty potentially
-	 * harmful to relatively short timers.
-	 */
-
-	/* This works perfectly on SMP only if the tb are in sync but
-	 * guarantees an error < 1 jiffy even if they are off by eons,
-	 * still reasonable when gettimeofday resolution is 1 jiffy.
-	 */
-	tb_delta = tb_ticks_since(last_jiffy_stamp(smp_processor_id()));
-
-	new_nsec -= 1000 * mulhwu(tb_to_us, tb_delta);
-
-	wtm_sec  = wall_to_monotonic.tv_sec + (xtime.tv_sec - new_sec);
-	wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - new_nsec);
-
-	set_normalized_timespec(&xtime, new_sec, new_nsec);
-	set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
-
-	/* In case of a large backwards jump in time with NTP, we want the
-	 * clock to be updated as soon as the PLL is again in lock.
-	 */
-	last_rtc_update = new_sec - 658;
-
-	ntp_clear();
-	write_sequnlock_irqrestore(&xtime_lock, flags);
-	clock_was_set();
-	return 0;
-}
-
-EXPORT_SYMBOL(do_settimeofday);
-
-/* This function is only called on the boot processor */
-void __init time_init(void)
-{
-	time_t sec, old_sec;
-	unsigned old_stamp, stamp, elapsed;
-
-        if (ppc_md.time_init != NULL)
-                timezone_offset = ppc_md.time_init();
-
-	if (__USE_RTC()) {
-		/* 601 processor: dec counts down by 128 every 128ns */
-		tb_ticks_per_jiffy = DECREMENTER_COUNT_601;
-		/* mulhwu_scale_factor(1000000000, 1000000) is 0x418937 */
-		tb_to_us = 0x418937;
-        } else {
-                ppc_md.calibrate_decr();
-		tb_to_ns_scale = mulhwu(tb_to_us, 1000 << 10);
-	}
-
-	/* Now that the decrementer is calibrated, it can be used in case the
-	 * clock is stuck, but the fact that we have to handle the 601
-	 * makes things more complex. Repeatedly read the RTC until the
-	 * next second boundary to try to achieve some precision.  If there
-	 * is no RTC, we still need to set tb_last_stamp and
-	 * last_jiffy_stamp(cpu 0) to the current stamp.
-	 */
-	stamp = get_native_tbl();
-	if (ppc_md.get_rtc_time) {
-		sec = ppc_md.get_rtc_time();
-		elapsed = 0;
-		do {
-			old_stamp = stamp;
-			old_sec = sec;
-			stamp = get_native_tbl();
-			if (__USE_RTC() && stamp < old_stamp)
-				old_stamp -= 1000000000;
-			elapsed += stamp - old_stamp;
-			sec = ppc_md.get_rtc_time();
-		} while ( sec == old_sec && elapsed < 2*HZ*tb_ticks_per_jiffy);
-		if (sec==old_sec)
-			printk("Warning: real time clock seems stuck!\n");
-		xtime.tv_sec = sec;
-		xtime.tv_nsec = 0;
-		/* No update now, we just read the time from the RTC ! */
-		last_rtc_update = xtime.tv_sec;
-	}
-	last_jiffy_stamp(0) = tb_last_stamp = stamp;
-
-	/* Not exact, but the timer interrupt takes care of this */
-	set_dec(tb_ticks_per_jiffy);
-
-	/* If platform provided a timezone (pmac), we correct the time */
-        if (timezone_offset) {
-		sys_tz.tz_minuteswest = -timezone_offset / 60;
-		sys_tz.tz_dsttime = 0;
-		xtime.tv_sec -= timezone_offset;
-        }
-        set_normalized_timespec(&wall_to_monotonic,
-                                -xtime.tv_sec, -xtime.tv_nsec);
-}
-
-#define FEBRUARY		2
-#define	STARTOFTIME		1970
-#define SECDAY			86400L
-#define SECYR			(SECDAY * 365)
-
-/*
- * Note: this is wrong for 2100, but our signed 32-bit time_t will
- * have overflowed long before that, so who cares.  -- paulus
- */
-#define	leapyear(year)		((year) % 4 == 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
-};
-
-void to_tm(int tim, struct rtc_time * tm)
-{
-	register int i;
-	register long hms, day, gday;
-
-	gday = 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. Jan. 1, 1970 was a Thursday.
-	 */
-	tm->tm_wday = (gday + 4) % 7;
-}
-
-/* Auxiliary function to compute scaling factors */
-/* Actually the choice of a timebase running at 1/4 the of the bus
- * frequency giving resolution of a few tens of nanoseconds is quite nice.
- * It makes this computation very precise (27-28 bits typically) which
- * is optimistic considering the stability of most processor clock
- * oscillators and the precision with which the timebase frequency
- * is measured but does not harm.
- */
-unsigned mulhwu_scale_factor(unsigned inscale, unsigned outscale) {
-	unsigned mlt=0, tmp, err;
-	/* No concern for performance, it's done once: use a stupid
-	 * but safe and compact method to find the multiplier.
-	 */
-	for (tmp = 1U<<31; tmp != 0; tmp >>= 1) {
-		if (mulhwu(inscale, mlt|tmp) < outscale) mlt|=tmp;
-	}
-	/* We might still be off by 1 for the best approximation.
-	 * A side effect of this is that if outscale is too large
-	 * the returned value will be zero.
-	 * Many corner cases have been checked and seem to work,
-	 * some might have been forgotten in the test however.
-	 */
-	err = inscale*(mlt+1);
-	if (err <= inscale/2) mlt++;
-	return mlt;
-}
-
-unsigned long long sched_clock(void)
-{
-	unsigned long lo, hi, hi2;
-	unsigned long long tb;
-
-	if (!__USE_RTC()) {
-		do {
-			hi = get_tbu();
-			lo = get_tbl();
-			hi2 = get_tbu();
-		} while (hi2 != hi);
-		tb = ((unsigned long long) hi << 32) | lo;
-		tb = (tb * tb_to_ns_scale) >> 10;
-	} else {
-		do {
-			hi = get_rtcu();
-			lo = get_rtcl();
-			hi2 = get_rtcu();
-		} while (hi2 != hi);
-		tb = ((unsigned long long) hi) * 1000000000 + lo;
-	}
-	return tb;
-}